Themed collection Recent Open Access Articles in Frontiers Journals
Neglected sulfur(VI) pharmacophores in drug discovery: exploration of novel chemical space by the interplay of drug design and method development
The key learnings of the utilization of sulfoximines, sulfondiimines and sulfonimidamides in drug discovery at Bayer AG are shared.
Mechanisms of Mg carbonates precipitation and implications for CO2 capture and utilization/storage
The precipitation of anhydrous Mg carbonates is hindered by the high energy barrier for dehydrating Mg2+ cations, and the mechanisms involved (classical or non-classical crystallization) in their precipitation remains as a scientific gap.
Recent developments in current collectors for lithium metal anodes
Lithium-ion batteries have been widely used in recent decades.
Site-selective modification of peptide backbones
Exciting developments in the site-selective modification of peptide backbones are allowing an outstanding fine-tuning of peptide conformation, folding ability, and physico-chemical and biological properties.
Advanced XPS characterization: XPS-based multi-technique analyses for comprehensive understanding of functional materials
X-ray photoelectron spectroscopy (XPS) has achieved maturity as an analytical technique in the materials community, however as made apparent by recent reviews highlighting it's misuse, it is a practice which is often misunderstood.
Direct synthetic routes to functionalised crown ethers
Modification of crown ethers via grafting of functional groups represents a convenient yet underexplored tool.
Emerging computational approaches for the study of regio- and stereoselectivity in organic synthesis
Computational chemistry has become important in organic synthesis as it provides a detailed understanding of molecular structures and properties and detailed reaction mechanisms.
Green strategies for transition metal-catalyzed C–H activation in molecular syntheses
Sustainable strategies for the activation of inert C–H bonds towards improved resource-economy.
Structural variation of self-assembled lanthanide supramolecular complexes induced by reaction conditions
The structural variation of self-assembled lanthanide supramolecular complexes which can be induced by different factors such as concentration, anion and solvent, cationic radii, stoichiometric ratio and light.
Recent advances in understanding oxygen evolution reaction mechanisms over iridium oxide
Recent spectroscopic and computational studies concerning the oxygen evolution reaction over iridium oxides are reviewed to provide the state-of-the-art understanding of its reaction mechanism.
Heterometallic coordination polymers as heterogeneous electrocatalysts
Heterometallic coordination polymers have been rapidly developed as heterogeneous electrocatalysts. This review highlights the synthesis strategies of these polymers and the relationships between structures and electrocatalytic performances.
Photodynamic therapy: photosensitizers and nanostructures
Photodynamic therapy (PDT) uses photosensitizers (PSs) to treat some skin and eye diseases, and certain types of cancer. In this review, we summarise the strategies to design PSs and how they can be incorporated into different nanostructures.
Stereoselective synthesis and applications of spirocyclic oxindoles
This review summaries recent synthetic developments towards spirocyclic oxindoles and applications as valuable medicinal and synthetic targets.
Nanocarriers used as probes for super-resolution microscopy
Super-resolution microscopy (SRM) has revolutionized cell biology, enabling visualization of cellular structures with nanometric resolution, single-molecule sensitivity, and with multiple colors. Here we review how nanocontainers have been used to enhance these techniques.
Recent advances in oligomers/polymers with unconventional chromophores
Unorthodox chromophores enjoy the advantages of better hydrophilicity, large structural diversity, low-cost and facile synthesis, high chain flexibility and good biocompatibility compared to conventional chromophores, leading to many applications.
A diversity of recently reported methodology for asymmetric imine reduction
This review describes recent developments in enantioselective imine reduction, including related substrates in which a CN bond is the target for reduction, and in situ methods.
Ring-opening Metathesis Polymerisation derived poly(dicyclopentadiene) based materials
This review article summarises the academic work in the fields of initiator development, polymer chemistry and physics, composites, self-healing composites, novel processing opportunities and macro-as well as microporous materials.
Biosafety materials: an emerging new research direction of materials science from the COVID-19 outbreak
We first officially propose the brand-new concept of “biosafety materials”, which utilizes materials science to solve biosafety problems.
High-order structures from nucleic acids for biomedical applications
This article reviews important developments in DNA nanotechnology and RNA nanotechnology and highlights supramolecular nucleic acid structures with biomedical applications.
Chemically modified electrodes with MOFs for the determination of inorganic and organic analytes via voltammetric techniques: a critical review
Current status on MOF-modified electrodes for voltammetric analyses of inorganic/organic species is critically discussed. We provide future research directions and specific criteria that MOFs should satisfy prior to their use as electrode modifiers.
Electro-activity and magnetic switching in lanthanide-based single-molecule magnets
The present work reviews switching of single-molecule magnetic behaviour achieved through various stimuli such as temperature, light irradiation, redox processes, solvation/desolvation, and magnetic field.
Diazido platinum(IV) complexes for photoactivated anticancer chemotherapy
Diazido Pt(IV) complexes with a general formula [Pt(N3)2(L)(L′)(OR)(OR′)] are a new generation of anticancer prodrugs designed for use in photoactivated chemotherapy.
Progress in the synthesis of perylene bisimide dyes
Rapid progress in the synthesis of perylene bisimide dyes gave an old scaffold new life.
Exceptionally flexible quinodimethanes with multiple conformations: polymorph-dependent colour tone and emission of crystals
Tetraazaanthraquinodimethanes can exhibit various colours and emissions depending on their multiple conformations, such as not only folded and twisted forms but also intermediate structures, e.g., planar and twisted-folded forms, in pseudopolymorphs.
Magnetic and relaxation properties of vanadium(IV) complexes: an integrated 1H relaxometric, EPR and computational study
The combination of two complementary magnetic resonance techniques, integrated by computational procedures, allows detailed solution characterization of vanadium(IV) complexes.
Sulfur–oleylamine copolymer synthesized via inverse vulcanization for the selective recovery of copper from lithium-ion battery E-waste
A novel sulfur–oleylamine copolymer as a promising sorbent to selectively recover Cu2+ ions from a mixture of metal ions in acidic pH and its potential applications in battery recycling.
Vapochromic films of π-conjugated polymers based on coordination and desorption at hypervalent tin(IV)-fused azobenzene compounds
Vapochromic π-conjugated polymer thin films showing a reversible color change were prepared. Reversible coordination-number control of hypervalent tin(IV)-fused azobenzene moieties between five and six triggered tuning of the electronic properties.
Fluorometric detection of volatile amines using an indanonalkene platform
An “indanonalkene” fluorescent chemosensor captured volatile amines via an amine–thiol scrambling reaction, and was applied to prepare portable paper-based sensors and polymeric film sensors for point-of-care detection of amines.
Stereoselective semisynthesis of uzarigenin and allo-uzarigenin
Herein, we present the first stereoselective semisynthesis of uzarigenin and allo-uzarigenin starting from the broadly available epi-androsterone in nine and seven steps, respectively.
Exfoliating layered zeolite MFI into unilamellar nanosheets in solution as precursors for the synthesis of hierarchical nanocomposites and oriented films
The separation of layered MFI into unilamellar nanosheets in solution confirms the general validity of soft-chemical exfoliation for zeolites and allows top-down production of films with potential applications in separation and catalysis.
Luminescent (metallo-supramolecular) cross-linked lanthanide hydrogels from a btp (2,3-bis(1,2,3-triazol-4-yl)picolinamide) monomer give rise to strong Tb(III) and Eu(III) centred emissions
The synthesis and study of the lanthanide luminescent 2,3-bis(1,2,3- triazol-4-yl)picolinamide (btp) based hydrogels F1 and F2 is described where Tb(III) or Eu(III) are also used to crosslink the btp units within the polymers.
Catalytic reactions in a Co12 cuboctahedral cage arising from guest encapsulation and cage-based redox activation
A Co12 coordination cage performs catalytic oxidation of bound fluorescein by a mechanism involving redox activation of HSO5− using metal ions in the superstructure.
Distinct insight into the use of difunctional double-decker silsesquioxanes as building blocks for alternating A–B type macromolecular frameworks
A distinct look at known, hydrosilylation reactions used for the formation of DDSQ-based linear A–B alternating macromolecular systems with DPn > 1000 is presented. Selected physicochemical properties of obtained hybrid co-polymers were determined.
Using internal strain and mass to modulate Dy⋯Dy coupling and relaxation of magnetization in heterobimetallic metallofullerenes DyM2N@C80 and Dy2MN@C80 (M = Sc, Y, La, Lu)
Relaxation of magnetization in DyM2N@C80 and Dy2MN@C80 (M = Sc, Y, La, Lu) series correlates, respectively, with the mass and size of the diamagnetic metal M.
Engineered mesoporous silica-based nanoparticles as smart chemotherapy nanodevice for bortezomib administration
Engineered mesoporous silica-based nanostructures for selective and pH-sensitive release of the anticancer drug bortezomib. The developed “smart chemotherapy” showed higher efficacy in vivo compared to traditional free bortezomib administration.
Towards panchromatic Fe(II) NHC sensitizers via HOMO inversion
Fused polythiophenes attached to Fe(II)NHC complexes induced a mixing of the t2g and π HOMO orbitals promoting 80 nm red-shift of the MLCT transition, 3 fold increase of the molar extinction coefficient and 3MLCT excited state lifetime up to 18 ps.
Precise control of the site selectivity in ruthenium-catalyzed C–H bond amidations using cyclic amides as powerful directing groups
A ruthenium-catalyzed C–H amidation using cyclic amides as directing groups features broad functional group tolerance. Mechanistic studies supported by DFT calculations highlight the relevance of six-membered ruthenacycles in the catalytic cycle.
Sequence-sorted redox-switchable heterorotaxanes
Programming the sequence of functional units in redox-switchable heterorotaxanes is achieved by integrative self-sorting for a library of five crown ethers.
Gating the photoactivity of azobenzene-type ligands trapped within a dynamic system of an M4L6 tetrahedral cage, an M2L2 metallocycle and mononuclear MLn complexes
Complexation of metal ions by a ligand bearing a azobenzene linker yielded two types of complexes: an [M2L2]4+ metallocycle and an [M4L6]8+ tetrahedral cage, which can be further converted into libraries of mononuclear [M(L′/L′′)n]2+ species.
Wanzlick's equilibrium in tri- and tetraaminoolefins
How to isolate small carbenes, previously reported to from dimers instantaneously, and how to split triaminoolefins into free carbenes.
Homolysis/mesolysis of alkoxyamines activated by chemical oxidation and photochemical-triggered radical reactions at room temperature
Instantaneous and spontaneous room temperature C–ON bond mesolysis of alkoxyamines triggered by chemical oxidation.
Photochemical CO2 conversion on pristine and Mg-doped gallium nitride (GaN): a comprehensive DFT study based on a cluster model approach
Photochemical reduction of carbon dioxide into methanol on bare and Mg-doped gallium nitrides. A detailed DFT study to shed light on the photocatalytic activity of this promising material.
Amphiphilic-like carbon dots as antitumoral drug vehicles and phototherapeutical agents
Amphiphilic-like carbon dots bearing ionizable carboxylate groups and hydrophobic alkyl chains entrap hydrophobic molecules and solubilize them in aqueous systems. In nanomedicine they can be used as drug delivery systems and phototherapeutic agents.
Multigram synthesis of an orthogonally-protected pentasaccharide for use as a glycan precursor in a Shigella flexneri 3a conjugate vaccine: application to a ready-for-conjugation decasaccharide
Fine-tuned catalytic processes facilitating regio- and stereoselective conversions for the large-scale synthesis of a pentasaccharide and its oligomerization into ready-for-conjugation haptens.
Deoxygenative nucleophilic difluoromethylselenylation of carboxylic acids and alcohols with BT-SeCF2H
BT-SeCF2H is introduced as a nucleophilic reagent for the deoxygenative difluoromethylselenylation of readily available carboxylic acid and alcohols.
An expedient, mild and aqueous method for Suzuki–Miyaura diversification of (hetero)aryl halides or (poly)chlorinated pharmaceuticals
Simple, aqueous and direct cross-coupling of diverse and complex (hetero)aromatic halides and active pharmaceutical agents.
Radical cations and dications of bisbenzothieno[1,4]thiazine isomers
Radical cations and dications of three isomeric bisbenzothieno[1,4]thiazines are (electro)chemically generated, spectroscopically characterized and assigned by (TD)DFT calculations.
Induced fit activity-based sensing: a mechanistic study of pyrophosphate detection with a “flexible” Fe-salen complex
A detailed mechanistic study of pyrophosphate (PPi) detection with a fluorometric Fe-salen based probe unravels the key structural switch of the Fe-bound PPi (“induced fit principle”) explaining the novel selectivity over other competing analytes.
Extended enantiopure ortho-phenylene ethylene (o-OPE)-based helical systems as scaffolds for supramolecular architectures: a study of chiroptical response and its connection to the CISS effect
Versatile enantiopure helical systems are described and are of interest owing to their intense chiroptical responses, their attractive architecture for metallosupramolecular chemistry and CISS effect.
Self-organizing gelatin–polycaprplactone materials with good fluid transmission can promote full-thickness skin regeneration
Gt–PCL composite materials, synthesized with polycaprplactone, gelatin and collagen, showed an improved epidermal healing rate and were able to respond and repair in advance.
A bifunctional robust metal sulfide with highly selective capture of Pb2+ ions and luminescence sensing ability for heavy metals in aqueous media
A 3-D metal sulfide ion exchanger (MSIE) with extra-framework H+ ions showed a remarkable capability for sorption of Pb2+ ions and highly efficient luminescence sensing properties towards various heavy metal ions.
Functional group introduction and aromatic unit variation in a set of π-conjugated macrocycles: revealing the central role of local and global aromaticity
Insights into how the optoelectronic properties of π-conjugated macrocycles evolve as a result of systematic structural changes are presented, helping to develop structure–property relationships and molecular design guidelines.
Aqueous assembly of a (pseudo)rotaxane with a donor–π–acceptor axis formed by a Knoevenagel condensation
The incorporation of a linear D–π–A “push–pull” chromophore synthesized by a Knoevenagel condensation as axle of a rotaxane is reported.
Elemental mapping of half-sandwich azopyridine osmium arene complexes in cancer cells
Nanofocused synchrotron X-ray fluorescence and inductively coupled plasma-mass spectrometry provide insights into time-dependent ligand exchange reactions of organo-osmium anticancer complexes in cancer cells. Created with Biorender.com.
Exploiting coordination geometry to tune the dimensions and processability of metallosupramolecular polymers
The increase in preorganization associated with coordination geometry changes is exploited to regulate solvation effects and, in turn, processability of metallosupramolecular polymers exhibiting close metal–metal contacts.
Experimental and theoretical evidence of charge transfer in multi-component alloys – how chemical interactions reduce atomic size mismatch
Ab initio DFT simulations show significant charge transfer in multi-component alloys reducing atomic mismatch, which is confirmed by X-ray photoelectron spectroscopy.
M/TiO2 (M = Fe, Co, Ni, Cu, Zn) catalysts for photocatalytic hydrogen production under UV and visible light irradiation
Cu/TiO2 photocatalysts can be considered a promising low-cost alternative to the well-known Pt/TiO2 system for hydrogen production under UV-Vis irradiation.
Cucurbitimines – imine cages with concave walls
Kinked tetraaldehyde building blocks lead in condensation reactions with diamines to pumpkin shaped cages – the cucurbitimines.
Dual-stimuli pseudorotaxane switches under kinetic control
Dual-stimuli pseudorotaxane switches: Threaded complexes dissociate upon deprotonation or oxidation. A mechanical bond changes the influence of a ‘speed bump’ on the outcome of a switching event.
In situ real-time monitoring of the mechanism of self-assembly of short peptide supramolecular polymers
The mechanism of self-assembly of amphiphilic short peptides has been studied in detail by the combination of multiparametric FLIM microscopy and single-molecule FLCS.
Mild reductive rearrangement of oximes and oxime ethers to secondary amines with hydrosilanes catalyzed by B(C6F5)3
Oximes, its ether derivatives and the corresponding hydroxylamines rearrange to secondary amines when reacted with PhSiH3 and B(C6F5)3 as catalyst. Computations suggest a reduction–rearrangement to be slightly favored over a Beckmann-type sequence.
The sol–gel autocombustion as a route towards highly CO2-selective, active and long-term stable Cu/ZrO2 methanol steam reforming catalysts
The adaption of the sol–gel autocombustion method to the Cu/ZrO2 system opens new pathways for the specific optimisation of the activity, long-term stability and CO2 selectivity of methanol steam reforming (MSR) catalysts.
Cork-derived hierarchically porous hydroxyapatite with different stoichiometries for biomedical and environmental applications
Hierarchically porous hydroxyapatite derived from cork powder shows excellent performance in biomedicine (low cytotoxicity) and environmental remediation (high Pb2+ removal).
Rational design of aqueous conjugated polymer nanoparticles as potential theranostic agents of breast cancer
Aqueous conjugated polymer nanoparticles developed by nanoprecipitation from a quinoxaline–thiophene type conjugated polymer with 3 fluorine atoms as potential cancer theranostics for breast cancer.
Effect of dz2 orbital electron-distribution of La-based inorganic perovskites on surface kinetics of a model reaction
Lanthanum-based perovskites, LaMO3 (M = Co, Fe, Mn, Ni, Cr, Cu, Zn) were synthesized using sol–gel method and characterised using both physical and chemical techniques.
Multi-technique structural characterization of glass foams with complex pore structures obtained through phase separation
Typical pore characterization techniques combined with computed tomography provided a complete description of the multimodal porous architecture of novel glass foams synthesised via foaming process followed by phase-separation and selective leaching.
Silica gel-induced aryne generation from o-triazenylarylboronic acids as stable solid precursors
We developed o-triazenylarylboronic acids as stable solid aryne precursors, which generate arynes under mild conditions using silica gel as the sole reagent and undergo reactions with a range of arynophiles both in solution and in the solid-state.
Organo-redox-catalysis for the difunctionalization of alkenes and oxidative Ritter reactions by C–H functionalization
Roll over transition metals-triarylamines are redox-catalysts, enabling olefin difunctionalization and C–H functionalization reactions by activating benzoyl peroxide.
Ceria doping boosts methylene blue photodegradation in titania nanostructures
The photocatalytic activity of titania nanotubes and nanoparticles toward methylene blue (MB) can be enhanced through addition of a small amount of Ce. MB acts as a hole scavenger, fastening the photocatalytic process.
Diversifying the luminescence of phenanthro-diimine ligands in zinc complexes
Strongly blue fluorescent 1-phenyl-2-(pyridin-2-yl)-1H-phenanthro[9,10-d]imidazole (L1) is a facile block for the construction of multichromophore organic molecules, and simultaneously serves as a chelating diimine ligand.
About this collection
This collection contains recent Open Access articles published from Frontiers journals (Inorganic Chemistry Frontiers, Organic Chemistry Frontiers and Materials Chemistry Frontiers) . New articles will be added to this webpage as soon as possible after publication.