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Themed collection Selenium & Tellurium chemistry at the beginning of the 3rd millennium: a celebration of ICCST

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Editorial

Selenium & tellurium chemistry at the beginning of the 3rd millennium: a celebration of ICCST

Vito Lippolis and Claudio Santi introduce the New Journal of Chemistry themed collection on selenium & tellurium chemistry at the beginning of the 3rd millennium: a celebration of ICCST.

Graphical abstract: Selenium & tellurium chemistry at the beginning of the 3rd millennium: a celebration of ICCST
Perspective

Ring opening reactions of heterocycles with selenium and tellurium nucleophiles

An overview of the preparation and synthetic potentialities of functionalized organoselenium and organotellurium compounds is presented.

Graphical abstract: Ring opening reactions of heterocycles with selenium and tellurium nucleophiles
Perspective

Pyridyl and pyrimidyl chalcogenolates of coinage metals and their utility as molecular precursors for the preparation of metal chalcogenides

Synthesis of and metallophilic interactions in N-heterocyclic chalcogenolates of coinage metals have been described and their utility as molecular precursors for binary and ternary chalcogenide materials has been demonstrated.

Graphical abstract: Pyridyl and pyrimidyl chalcogenolates of coinage metals and their utility as molecular precursors for the preparation of metal chalcogenides
Perspective

1,4-Anhydro-4-seleno-D-talitol (SeTal): a remarkable selenium-containing therapeutic molecule

1,4-Anhydro-4-seleno-D-talitol is an exceptional selenium-containing small molecule with significant therapeutic potential; its beneficial actions firmly establish a new therapeutic paradigm in which selenium plays a central role.

Graphical abstract: 1,4-Anhydro-4-seleno-d-talitol (SeTal): a remarkable selenium-containing therapeutic molecule
Perspective

Organoselenium small molecules as catalysts for the oxidative functionalization of organic molecules

This perspective highlights the critical analysis of the challenges, in the past decade, which led to the development of organoselenium compounds and their use as versatile catalysts in organic synthesis towards the oxidation of olefins and C–H bonds. Furthermore, the emphasis here differs from previous reviews of the field by classifying the various types of catalyses and the diverse strategies.

Graphical abstract: Organoselenium small molecules as catalysts for the oxidative functionalization of organic molecules
Open Access Perspective

Adaptive responses of sterically confined intramolecular chalcogen bonds

The existence of intramolecular chalcogen bonds (IChBs) in 2,6-disubstituted arylchalcogen derivatives is determined by the substituents and the sigma hole donor behavior of the chalcogen atom in the molecule.

Graphical abstract: Adaptive responses of sterically confined intramolecular chalcogen bonds
Perspective

Developments in the chemistry of the hard early metals (Groups 1–6) with thioether, selenoether and telluroether ligands

Key developments in the coordination chemistry of the soft, neutral chalcogenoether ligands towards hard s-, f- and early d-block ions, and their prospects for various applications are discussed.

Graphical abstract: Developments in the chemistry of the hard early metals (Groups 1–6) with thioether, selenoether and telluroether ligands
Perspective

PCP-bridged chalcogen-centred anions: coordination chemistry and carbon-based reactivity

Multidentate chalcogen-centred ligands, whose flexibility and redox-activity is manifested in their metal complexes, are generated from bis(chalcogenophosphinoyl) C-bridged anions via selenium–proton exchange or direct reaction with chalcogens.

Graphical abstract: PCP-bridged chalcogen-centred anions: coordination chemistry and carbon-based reactivity
Frontier

Palladium-catalysed direct thiolation and selenation of aryl C–H bonds assisted by directing groups

Recent advances on transition-metal-catalyzed direct chalcogenation of C–H bonds with disulfides and diselenides are summarized.

Graphical abstract: Palladium-catalysed direct thiolation and selenation of aryl C–H bonds assisted by directing groups
Minireview

Biology and toxicology of tellurium explored by speciation analysis

Recent advances in the speciation and identification of tellurium metabolites in animals and plants by LC-ICP-MS and LC-ESI-MS are reviewed.

Graphical abstract: Biology and toxicology of tellurium explored by speciation analysis
Feature Article

Marriage of heavy main group elements with π-conjugated materials for optoelectronic applications

This review showcases recent work devoted to placing heavy inorganic elements within π-conjugated frameworks and the novel properties that can arise.

Graphical abstract: Marriage of heavy main group elements with π-conjugated materials for optoelectronic applications
Review Article

“The green side of the moon: ecofriendly aspects of organoselenium chemistry”

Key aspects for the development of a greener synthesis and the use of the organoselenium compounds.

Graphical abstract: “The green side of the moon: ecofriendly aspects of organoselenium chemistry”
Tutorial Review

Tellurium: a maverick among the chalcogens

This tutorial review elucidates the fundamental concepts necessary for an understanding of the unique structures and reactivities of tellurium compounds.

Graphical abstract: Tellurium: a maverick among the chalcogens
Tutorial Review

The single molecular precursor approach to metal telluride thin films: imino-bis(diisopropylphosphine tellurides) as examples

Pure thin films of metal tellurides, such as CdTe, Sb2Te3 and In2Te3, can be generated from complexes of the [TePri2PNPPri2Te] ligand by using the technique of aerosol-assisted chemical vapour deposition.

Graphical abstract: The single molecular precursor approach to metal telluride thin films: imino-bis(diisopropylphosphine tellurides) as examples
Communication

Synthesis of selenocysteine-containing cyclic peptides via tandem N-to-S acyl migration and intramolecular selenocysteine-mediated native chemical ligation

Cyclic selenocysteine-containing peptides were synthesized via one-pot tandem conversion of N-alkylcysteine-containing selenopeptides.

Graphical abstract: Synthesis of selenocysteine-containing cyclic peptides via tandem N-to-S acyl migration and intramolecular selenocysteine-mediated native chemical ligation
Communication

Visible-light promoted fluoroalkylselenolation: toward the reactivity of unsaturated compounds

α-Fluoroalkylselenolated sulfones have been readily obtained via a visible-light promoted radical addition of fluoroalkylselenyl and tosyl groups onto unsaturated substrates.

Graphical abstract: Visible-light promoted fluoroalkylselenolation: toward the reactivity of unsaturated compounds
From the themed collection: Fluorine Chemistry
Communication

Synthesis and antioxidant capacity of novel stable 5-tellurofuranose derivatives

Novel stable tellurium-containing carbohydrates are prepared; these react very rapidly with two-electron oxidants and show promise as protective agents.

Graphical abstract: Synthesis and antioxidant capacity of novel stable 5-tellurofuranose derivatives
Communication

Methionine and seleno-methionine type peptide and peptoid building blocks synthesized by five-component five-center reactions

A first example of Ugi 5-component 5-center reactions resulted in methionine and Se-methionine type peptide and peptoid building blocks.

Graphical abstract: Methionine and seleno-methionine type peptide and peptoid building blocks synthesized by five-component five-center reactions
Communication

A new class of silica-supported chromo-fluorogenic chemosensors for anion recognition based on a selenourea scaffold

The first example of a chromo-fluorogenic chemosensor containing a selenourea moiety is here described.

Graphical abstract: A new class of silica-supported chromo-fluorogenic chemosensors for anion recognition based on a selenourea scaffold
Communication

A ruthenium tellurocarbonyl (CTe) complex with a cyclopentadienyl ligand: systematic studies of a series of chalcogenocarbonyl complexes [CpRuCl(CE)(H2IMes)] (E = O, S, Se, Te)

The first tellurocarbonyl complex with a half-sandwich structure [CpRuCl(CTe)(H2IMes)] was synthesized and compared with its CE (E = O, S, Se) analogs.

Graphical abstract: A ruthenium tellurocarbonyl (CTe) complex with a cyclopentadienyl ligand: systematic studies of a series of chalcogenocarbonyl complexes [CpRuCl(CE)(H2IMes)] (E = O, S, Se, Te)
Open Access Communication

Permanently porous hydrogen-bonded frameworks of rod-like thiophenes, selenophenes, and tellurophenes capped with MIDA boronates

Permanently porous hydrogen-bonded organic frameworks comprising rod-like molecules with two MIDA boronate termini have been prepared.

Graphical abstract: Permanently porous hydrogen-bonded frameworks of rod-like thiophenes, selenophenes, and tellurophenes capped with MIDA boronates
Communication

Diselenide-based probe for the selective imaging of hypochlorite in living cancer cells

A non-traditional and robust probe skeleton was derivatized for chemosensing applications to investigate a potential novel mode of hypochlorite detection.

Graphical abstract: Diselenide-based probe for the selective imaging of hypochlorite in living cancer cells
Communication

Sodium and rhodium complexes of a spirocyclic Te5 dianion supported by P2N2 rings

The versatile coordinating ability of a novel spirocyclic, P2N2-supported Te5 dianion is exemplified by N,N′-bonding to Na+ ions and Te,Te′,Te′′ linkages to a Cp*Rh(III) group.

Graphical abstract: Sodium and rhodium complexes of a spirocyclic Te5 dianion supported by P2N2 rings
Open Access Communication

Biosynthetic selenoproteins with genetically-encoded photocaged selenocysteines

The first general approach for the biosynthesis of selenoproteins that contain photocaged selenocysteine residues at genetically-encoded positions is described.

Graphical abstract: Biosynthetic selenoproteins with genetically-encoded photocaged selenocysteines
Communication

Phosphorescence within benzotellurophenes and color tunable tellurophenes under ambient conditions

The zirconium-mediated syntheses of pinacolboronate (BPin) appended benzo[b]tellurophenes and two phenyl/BPin substituted tellurophene isomers with different colors of emission have been achieved.

Graphical abstract: Phosphorescence within benzotellurophenes and color tunable tellurophenes under ambient conditions
Open Access Communication

Diselenolodiselenole: a selenium containing fused heterocycle for conjugated systems

Diselenolodiselenole (C4Se4) derivatives are synthesized for the first time by heating substituted diaryl diynes with elemental selenium. The optical, electrochemical and structural properties of C4Se4-derivatives are tuned by varying end-capping aromatic substituents.

Graphical abstract: Diselenolodiselenole: a selenium containing fused heterocycle for conjugated systems
Open Access Communication

The activation of Woollins' reagent. Isolation of pyridine stabilised PhPSe2

Reaction of Woollins' reagent (WR) with pyridine yields the P(V) species PhPSe2 stabilised by pyridine coordination. Its potential as a selenation reagent under mild conditions was shown by calculations and an experimental comparison to WR.

Graphical abstract: The activation of Woollins' reagent. Isolation of pyridine stabilised PhPSe2
Communication

An ebselen like catalyst with enhanced GPx activity via a selenol intermediate

Benzamide ring-substituted, quinine-derived ebselen analogue is synthesized which exists in selenol form upon addition of PhSH. It catalyses oxidation of PhSH with H2O2 faster (103-fold) than ebselen.

Graphical abstract: An ebselen like catalyst with enhanced GPx activity via a selenol intermediate
Communication

Anti-Markovnikov hydrophosphoroselenoylation of alkenes using phosphorodiselenoic acid esters leading to the formation of phosphonoselenoic acid esters

Phosphorodiselenoic acid esters with a binaphthyl group were reacted with alkenes in the presence of Bu3SnH and AIBN to give phosphonoselenoic acid esters in moderate to good yields.

Graphical abstract: Anti-Markovnikov hydrophosphoroselenoylation of alkenes using phosphorodiselenoic acid esters leading to the formation of phosphonoselenoic acid esters
Open Access Communication

An efficient route for the synthesis of phosphorus–selenium macro-heterocycles

[PhP(Se)(μ-Se)]2 (Woollins' reagent, WR) with disodium alkenyl-diols and dibromoalkanes are able to construct a series of unusual nine- to fifteen-membered organoselenophosphorus macrocycles bearing the O–P–Se–Cn–Se–P–O linkage or the O–P–Se–Cn–O–P–Se linkage.

Graphical abstract: An efficient route for the synthesis of phosphorus–selenium macro-heterocycles
Communication

Controlling Pt nanoparticle formation through Se⋯Pt interactions on the electrode surface

Interactions between the electrode surface and the transition metal during the initial step of metal nanoparticle formation can be utilized to control the formation and size of metal nanoparticles deposited on a conducting surface.

Graphical abstract: Controlling Pt nanoparticle formation through Se⋯Pt interactions on the electrode surface
Communication

Planar P6E6 (E = Se, S) macrocycles incorporating P2N2 scaffolds

The 15-membered rings [(tBuN)P(μ-NtBu)2P(NtBu)(μ-E–E)]3 (E = Se, S) are comprised of planar P6E6 motifs stabilised by perpendicular P2N2 rings.

Graphical abstract: Planar P6E6 (E = Se, S) macrocycles incorporating P2N2 scaffolds
Communication

Photoluminescent selenospirocyclic and selenotetracyclic derivatives by domino reactions of amines and imines

Novel photoluminescent selenospirocyclic and selenotetracyclic compounds, stabilized by intramolecular secondary Se⋯O interactions with an ortho-nitro group, have been accessed successfully through domino reactions of amines and imines, respectively.

Graphical abstract: Photoluminescent selenospirocyclic and selenotetracyclic derivatives by domino reactions of amines and imines
Communication

Thermal reaction of a (hydrido)(selenolato)platinum(II) complex having a dibenzobarrelenylgroup leading to three cyclometalations

The thermal reaction of a (dibenzobarreleneselenolato)(hydrido)platinum(II) complex gave two four-membered selenaplatinacycles by syn-hydroplatination and a vinylic C–H activation and a five-membered one by an aromatic C–H activation.

Graphical abstract: Thermal reaction of a (hydrido)(selenolato)platinum(ii) complex having a dibenzobarrelenyl group leading to three cyclometalations
Communication

Novel carbon-centred reactivity of [(H)C(PPh2Se)2] in the formation of structurally diverse Sn(IV), Te(IV) and Hg(II) complexes of the triseleno ligand [(Se)C(PPh2Se)2]2–

The 2 : 1 reactions between TMEDA·Li[(H)C(PPh2Se)2] and MCl2 afforded the homoleptic complexes, {M[(H)C(PPh2Se)2]2}, which undergo a selenium/hydrogen exchange at the carbon centre to yield the dianionic triseleno ligand in {Mn[(Se)C(PPh2Se)2]2} (n = 1, M = Sn, Te; n = 2, M = Hg).

Graphical abstract: Novel carbon-centred reactivity of [(H)C(PPh2Se)2]− in the formation of structurally diverse Sn(iv), Te(iv) and Hg(ii) complexes of the triseleno ligand [(Se)C(PPh2Se)2]2–
Communication

Poly(cyclopenta[c]selenophene): a new polyselenophene

Cyclopenta[c]selenophene-(CH2OMe)2 has been synthesized by a new synthetic approach and successfully electrochemically polymerized. PCPS showed well-defined spectroelectrochemistry, a low band gap and good stability in the oxidized state. Calculations predicted a planar structure for PCPS.

Graphical abstract: Poly(cyclopenta[c]selenophene): a new polyselenophene
Communication

Hydrolysis of 2-phenylazophenyltellurium trihalides: isolation of an unprecedented homometallic, discrete heptanuclear organotellurium oxidecluster

Alkaline hydrolysis of (2-phenylazophenyl)tellurium trihalides gave an intramolecularly stabilized homometallic, heptanuclear organotellurium oxide cluster R6Te7O11 (4) in good yield.

Graphical abstract: Hydrolysis of 2-phenylazophenyltellurium trihalides: isolation of an unprecedented homometallic, discrete heptanuclear organotellurium oxide cluster
Communication

Diazabutadiene complexes of selenium as Se2+ transfer reagents

Alkyl and aryl substituted diazabutadiene ligands are shown to support a highly electrophilic “Se2+” synthon, which can be utilized in ligand exchange reactions to generate Se centred dicationic coordination complexes.

Graphical abstract: Diazabutadiene complexes of selenium as Se2+ transfer reagents
Communication

N-Triphenylboryl- and N,N′-bis(triphenylboryl)benzo-2,1,3-telluradiazole

Triphenylborane adducts of benzo-2,1,3-telluradiazole are isoelectronic and isostructural analogues of N-alkyl-substituted telluradiazolyl cations.

Graphical abstract: N-Triphenylboryl- and N,N′-bis(triphenylboryl)benzo-2,1,3-telluradiazole
Communication

Telluroselenophosphonium ions: their unusual soft–soft interactions with iodotellurate anions

The formally uncharged tellurium atom from the first telluroselenophosphonium cation [tBu(iPr)2(p-TolTeSe)P]+ behaves as a soft acceptor towards the central tellurium atom of a diiodotellurate(II) anion [p-TolTeI2], exhibiting a novel type of Te(anion)→ Te(cation) donor–acceptor interaction involving two orthogonal 3c–4e systems.

Graphical abstract: Telluroselenophosphonium ions: their unusual soft–soft interactions with iodotellurate anions
Communication

The effect of selenium incorporation on the bandwidth and conductivity of neutral radical conductors

The first example of an undimerized π-stacked bis-1,2,3-thiaselenazolyl radical displays improved bandwidth and conductivity relative to an isostructural bis-1,2,3-dithiazolyl.

Graphical abstract: The effect of selenium incorporation on the bandwidth and conductivity of neutral radical conductors
Communication

Enantiomerically pure P-chiral phosphinoselenoic chlorides: inversion of configuration at the P-chirogenic center in the synthesis and reaction of these substances

Optically active P-chiral phosphinoselenoic chlorides were successfully synthesized by reacting optically active phosphinoselenoic acid salts with oxalyl chloride. The chloride was converted to a phosphinoselenothioic acid salt with high ee.

Graphical abstract: Enantiomerically pure P-chiral phosphinoselenoic chlorides: inversion of configuration at the P-chirogenic center in the synthesis and reaction of these substances
Communication

Synthesis of primary-alkyl selenols and selenides from primary-alkyl thiols involving diphenyl sulfonium salts

Hexyl thiol has been transformed to hexyl selenol and related selenides and selenocyanate by substitution of the corresponding hexyldiphenylsulfonium tetrafluoroborate with selenium nucleophiles.

Graphical abstract: Synthesis of primary-alkyl selenols and selenides from primary-alkyl thiols involving diphenyl sulfonium salts
Communication

Vapour deposited films of quinoidal biselenophene and bithiophene derivatives as active layers of n-channel organic field-effect transistors

n-Channel OFETs using oligoselenophane- and oligothiophene-based semiconductors as active layers have been successfully fabricated, and the field-effect mobilities for the selenophane-based compounds are found to be higher than those for the thiophene analogues.

Graphical abstract: Vapour deposited films of quinoidal biselenophene and bithiophene derivatives as active layers of n-channel organic field-effect transistors
Communication

First linear alignment of five C–Se⋯O⋯Se–C atoms in anthraquinone and 9-(methoxy)anthracene bearing phenylselanyl groups at 1,8-positions

Five Ci–Se⋯O⋯Se–Ci atoms in anthraquinone and 9-(methoxy)anthracene bearing phenylselanyl groups at 1,8-positions align linearly, the origin of which is shown to be a non-bonded 5c–6e interaction of the five atoms.

Graphical abstract: First linear alignment of five C–Se⋯O⋯Se–C atoms in anthraquinone and 9-(methoxy)anthracene bearing phenylselanyl groups at 1,8-positions
Communication

Functionalizing the surface of II–VI clusters: redox active centres on the adamantoid complex [Cd4Cl4{μ-(SeC5H4)Fe(C5H5)}6]2−

Trimethylsilylselenoferrocene 1 has been prepared in good yield from sodium ferrocenylselenolate. The reagent 1 is used as for the synthesis [Cl4Cd42-Se(C5H4)Fe(C5H5)}6]2−2 (shown), a Cd4Se6 adamantoid cluster with six surface ferrocenyl groups.

Graphical abstract: Functionalizing the surface of II–VI clusters: redox active centres on the adamantoid complex [Cd4Cl4{μ-(SeC5H4)Fe(C5H5)}6]2−
Communication

Dissociative cycloelimination, a new selenium based pericyclic reaction

Letter

Model study on trapping of protein selenenic acids by utilizing a stable synthetic congener

Model studies on the trapping reaction of protein selenenic acids were carried out with a stable primary-alkyl model compound.

Graphical abstract: Model study on trapping of protein selenenic acids by utilizing a stable synthetic congener
Open Access Edge Article

Diselenolane-mediated cellular uptake

Selenophilicity, minimized dihedral angles, acidic selenols, multitarget hopping: cytosolic delivery with 1,2-diselenolanes outperforms 1,2-dithiolanes, by far.

Graphical abstract: Diselenolane-mediated cellular uptake
Open Access Edge Article

Accessing human selenoproteins through chemical protein synthesis

The human body contains 25 selenoproteins, but challenges in their preparations have prevented biological characterizations thus far. Here we report the first total chemical syntheses of two human selenoproteins, selenoprotein M (SELM) and selenoprotein W (SELW).

Graphical abstract: Accessing human selenoproteins through chemical protein synthesis
Open Access Edge Article

Diaryldichalcogenide radical cations

One-electron oxidation of diaryldichalcogenides is the key to the preparation of the corresponding radical cations.

Graphical abstract: Diaryldichalcogenide radical cations
Edge Article

Investigation on photo-induced charge separation in CdS/CdTe nanopencils

CdS/CdTe nanopencils were synthesized via anion exchange and the effect of the geometry on the carrier dynamics was investigated.

Graphical abstract: Investigation on photo-induced charge separation in CdS/CdTe nanopencils
Paper

Copper complexes and carbon nanotube–copper ferrite-catalyzed benzenoid A-ring selenation of quinones: an efficient method for the synthesis of trypanocidal agents

A-ring selenation of naphthoquinones and anthraquinones is reported. The reaction proceeds in the presence of a copper source, and provides an efficient and general method for preparing selenium-based quinones with trypanocidal activity.

Graphical abstract: Copper complexes and carbon nanotube–copper ferrite-catalyzed benzenoid A-ring selenation of quinones: an efficient method for the synthesis of trypanocidal agents
Paper

Structural diversity of the complexes of monovalent metal d10 ions with macrocyclic aggregates of iso-tellurazole N-oxides

Iso-tellurazole N-oxides yield a remarkable variety of structures with coinage-metal monocations.

Graphical abstract: Structural diversity of the complexes of monovalent metal d10 ions with macrocyclic aggregates of iso-tellurazole N-oxides
Paper

The reaction of phenoxatellurine with single-electron oxidizers revisited

Baking Pancakes: Dicationic products of the single-electron oxidation of phenoxatellurine.

Graphical abstract: The reaction of phenoxatellurine with single-electron oxidizers revisited
Paper

Sulphur–sulphur, sulphur–selenium, selenium–selenium and selenium–carbon bond activation using Fe3(CO)12: an unexpected formation of an Fe2(CO)6 complex containing a μ23-C,O,Se-ligand

Four diiron hexacarbonyl-complexes containing dithiolato (5), diselenolato (6), selenolato-thiolato (7) and μ23-C,O,Se-ligands (8), respectively have been prepared as [FeFe]-hydrogenase mimics.

Graphical abstract: Sulphur–sulphur, sulphur–selenium, selenium–selenium and selenium–carbon bond activation using Fe3(CO)12: an unexpected formation of an Fe2(CO)6 complex containing a μ2,κ3-C,O,Se-ligand
Paper

Free radical induced selenoxide formation in isomeric organoselenium compounds: the effect of chemical structures on antioxidant activity

Formation of selenoxides improves the antioxidant activity of organoselenium compounds and should be considered as an important marker in the design of new selenium based antioxidants.

Graphical abstract: Free radical induced selenoxide formation in isomeric organoselenium compounds: the effect of chemical structures on antioxidant activity
Paper

Reactivity of bis[{2,6-(dimethylamino)methyl}phenyl]telluride with Pd(II) and Hg(II): isolation of the first Pd(II) complex of an organotellurenium cation as a ligand

The first complex of an organotellurenium cation as a ligand with Pd(II) is reported.

Graphical abstract: Reactivity of bis[{2,6-(dimethylamino)methyl}phenyl]telluride with Pd(ii) and Hg(ii): isolation of the first Pd(ii) complex of an organotellurenium cation as a ligand
Paper

Isomorphic substitution in molecular crystals and geometry of hypervalent tellurium: comments inspired by a case study of RMeTeI2 and [RMe2Te]+I (R = Ph, Fc)

Unusual isomorphic substitution in the crystals of [FcMe2Te]+I with an admixture of Te–I ionized [FcMeTeI+]I supports the 3c-4e as a general, seamless bonding model for the hypervalent tellurium in both the isolated molecules and crystals.

Graphical abstract: Isomorphic substitution in molecular crystals and geometry of hypervalent tellurium: comments inspired by a case study of RMeTeI2 and [RMe2Te]+I− (R = Ph, Fc)
Paper

A comparative study on NHC-functionalized ternary Se/Te–Fe–Cu compounds: synthesis, catalysis, and the effect of chalcogens

A novel family of highly efficient Se–Fe–Cu–NHC catalysts was synthesized, which were suitable models for the study of the chalcogen effect.

Graphical abstract: A comparative study on NHC-functionalized ternary Se/Te–Fe–Cu compounds: synthesis, catalysis, and the effect of chalcogens
Paper

Selenopheno[2,3-f]coumarins: novel scaffolds with antimetastatic activity against melanoma and breast cancer

The general aim of the current research is to find novel non-toxic small molecules with antimetastatic activity.

Graphical abstract: Selenopheno[2,3-f]coumarins: novel scaffolds with antimetastatic activity against melanoma and breast cancer
Paper

Reaction of imidazoline-2-selone derivatives with mesityltellurenyl iodide: a unique example of a 3c-4e Se→Te←Se three-body system embedding a tellurenyl cation

1,2-Bis(3-methyl-4-imidazolin-2-selone)ethane was used to stabilize the first example of an authentic mesityltellurenyl cation, [MesTe]+, as a charge transfer adduct featuring a 3c-4e Se→Te←Se three-body system.

Graphical abstract: Reaction of imidazoline-2-selone derivatives with mesityltellurenyl iodide: a unique example of a 3c-4e Se→Te←Se three-body system embedding a tellurenyl cation
Open Access Paper

Release of reactive selenium species from phthalic selenoanhydride in the presence of hydrogen sulfide and glutathione with implications for cancer research

The last decade has witnessed a renewed interest in selenium (Se) as an element able to prevent a range of illnesses in humans, mainly through supplementation.

Graphical abstract: Release of reactive selenium species from phthalic selenoanhydride in the presence of hydrogen sulfide and glutathione with implications for cancer research
Paper

Experimental evidence for hypercoordination in triorganotelluronium halides with 2-(Me2NCH2)C6H4 groups

Triorganotelluronium halides of type [{2-(Me2NCH2)C6H4}nPh3−nTe]+X (n = 1–3, X = Cl, Br, I) were prepared and structurally characterized both in solution and in the solid state, showing a (C,N)-chelating behavior of the 2-(Me2NCH2)C6H4 groups.

Graphical abstract: Experimental evidence for hypercoordination in triorganotelluronium halides with 2-(Me2NCH2)C6H4 groups
Paper

A reversible and turn-on type fluorescence behaviour of hydrogen sulfide via a redox cycle between selenoxide and selenide

Upon treatment with H2S in MeCN–PBS, the fluorescence dormant selenoxides of dibenzobarrelene- and benzobarrelene-based 1-seleno-1,3-butadiene derivatives are rapidly converted to strongly fluorescent selenides.

Graphical abstract: A reversible and turn-on type fluorescence behaviour of hydrogen sulfide via a redox cycle between selenoxide and selenide
Paper

New methodology of nucleophilic substitution at three different centers of a seleniranium intermediate in reactions of 2-bromomethyl-1,3-thiaselenole with mercapto benzazoles

Regio- and stereoselective reactions accompanied by rearrangements with ring extension or contraction.

Graphical abstract: New methodology of nucleophilic substitution at three different centers of a seleniranium intermediate in reactions of 2-bromomethyl-1,3-thiaselenole with mercapto benzazoles
Open Access Paper

Acylseleno- and acylthioureato complexes of gold(I) N-heterocyclic carbenes

Gold(I) N-heterocyclic carbene complexes with anionic acylselenourea ligands bound to gold only through selenium were prepared in a one-pot procedure.

Graphical abstract: Acylseleno- and acylthioureato complexes of gold(i) N-heterocyclic carbenes
Paper

Dicationic ditelluride salts stabilized by N-heterocyclic carbene

Two types of dicationic ditelluride salts stabilized by N-heterocyclic carbene have been synthesized and characterized by their spectroscopic data, X-ray diffraction, and DFT calculations.

Graphical abstract: Dicationic ditelluride salts stabilized by N-heterocyclic carbene
Paper

Syntheses, characterization, DNA/BSA binding, and in vitro cytostatic activity of fluorobenzenetelluronic triorganotin(IV) esters

A new series of fluorobenzenetelluronic triorganotin(IV) esters (1–6) have been synthesized by the reaction of deprotonated fluorobenzenetelluronic acid ligands and the corresponding R3SnCl (R = Me, Ph).

Graphical abstract: Syntheses, characterization, DNA/BSA binding, and in vitro cytostatic activity of fluorobenzenetelluronic triorganotin(iv) esters
Paper

Energy framework approach to the supramolecular reactions: interplay of the secondary bonding interaction in Ph2E2 (E = Se, Te)/p-I-C6F4-I co-crystals

Persistent packing patterns found in pure diorgano-dichalcogenides (Ph2E2) and their co-crystals suggest new, energy-based visualization and description of co-crystal formation.

Graphical abstract: Energy framework approach to the supramolecular reactions: interplay of the secondary bonding interaction in Ph2E2 (E = Se, Te)/p-I-C6F4-I co-crystals
137 items - Showing page 1 of 2

About this collection

The chemistry of selenium and tellurium is experiencing continuous and exponential growth thanks to its implication in many research fields spanning from fundamental organic/inorganic/bio-chemistry, to material science, biology, pharmacology, medicine, agriculture and environmental science.

The International Conference on the Chemistry of Selenium and Tellurium (ICCST), next year at its 14th edition, has witnessed and supported the growth of this research area since 1971, offering an International forum for discussing cutting-edge results. Interest in the chemistry of these two elements has been sustained by the RSC publishing several reviews and monographs over the past decade. 

This thematic web collection on all facets of the chemistry of selenium and tellurium will give an open updated snapshot of the research on these two elements as multidisciplinary science, offering unique opportunities of interactions of researchers working in different areas, and it will celebrate ICCST as recognized platform of discussion. 

The collection, Guest Edited by Vito Lippolis and Claudio Santi, will contain papers published in the past 20 years by chemists who have attended ICCST, and new papers published in NJC by the end of 2019. 

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