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Themed collection Supramolecular chemistry: self-assembly and molecular recognition

22 items
Review Article

Selectively sensing first-row transition metal ions through fluorescence enhancement

Fluorescence signaling systems that give enhancement in the presence of first-row transition metal ions are discussed.

Graphical abstract: Selectively sensing first-row transition metal ions through fluorescence enhancement
Review Article

Radicals in metal–organic frameworks

We discuss early advances in the incorporation of radicals into the ever evolving class of materials known as metal–organic frameworks.

Graphical abstract: Radicals in metal–organic frameworks
Communication

Self-assembly of supramolecular triangles with neutral trans-PdCl2 directing units

Pd(II)-directed self-assembly of homoleptic metal–polypyridyl complexes functionalized with 3-pyridyl groups gives rise to supramolecular metallo-triangles as confirmed by a combination of analytical techniques.

Graphical abstract: Self-assembly of supramolecular triangles with neutral trans-PdCl2 directing units
Communication

Anion-dependent spin crossover in solution for an iron(II) complex of a 1H-pyrazolyl ligand

The spin-crossover equilibrium midpoint temperature (T1/2) in [Fe(3-bpp)2]X2 (3-bpp = 2,6-di{pyrazol-3-yl}pyridine) varies from 259 K when X = BPh4 to 277 K when X = Br, in a polar acetone–water solvent mixture.

Graphical abstract: Anion-dependent spin crossover in solution for an iron(ii) complex of a 1H-pyrazolyl ligand
Paper

Hydrogen-bonding driven luminescent assembly and efficient Förster Resonance Energy Transfer (FRET) in a dialkoxynaphthalene-based organogel

Co-assembly of FRET donor–acceptor pair facilitates highly efficient energy transfer in gel state.

Graphical abstract: Hydrogen-bonding driven luminescent assembly and efficient Förster Resonance Energy Transfer (FRET) in a dialkoxynaphthalene-based organogel
Open Access Paper

Supramolecular assemblies of semiconductor quantum dots and a bis(bipyridinium) derivative: luminescence quenching and aggregation phenomena

CdSe and CdSe–ZnS nanocrystal aggregates are formed in solution in the presence of a bis(bipyridinium) species, and disrupted upon addition of a macrocyclic host.

Graphical abstract: Supramolecular assemblies of semiconductor quantum dots and a bis(bipyridinium) derivative: luminescence quenching and aggregation phenomena
Paper

Subtle backbone modifications control the interpenetration of dibenzosuberone-based coordination cages

The self-assembly of interpenetrated double-cages was examined with respect to various synthetic modifications of the dibenzosuberone backbone.

Graphical abstract: Subtle backbone modifications control the interpenetration of dibenzosuberone-based coordination cages
Paper

Ester-substituted cyclometallated rhodium and iridium coordination assemblies with π-bonded dioxolene ligand: synthesis, structures and luminescent properties

A series of functionalized cyclometallated rhodium and iridium coordination assemblies 2–7 displaying a π-bonded dioxolene ligand is described.

Graphical abstract: Ester-substituted cyclometallated rhodium and iridium coordination assemblies with π-bonded dioxolene ligand: synthesis, structures and luminescent properties
Paper

A 4-tert-butylcalix[4]arene tetrahydroxamate podand based on the 1-oxypiperidine-2-one (1,2-PIPO) chelate. Self-assembly into a supramolecular ionophore driven by coordination of tetravalent zirconium or hafnium(IV)

K+ is encapsulated by 2 : 2 complexes of tetravalent zirconium or hafnium with the calix[4]arene podand 1H4 carrying four cyclic hydroxamate binding units.

Graphical abstract: A 4-tert-butylcalix[4]arene tetrahydroxamate podand based on the 1-oxypiperidine-2-one (1,2-PIPO−) chelate. Self-assembly into a supramolecular ionophore driven by coordination of tetravalent zirconium or hafnium(iv)
Paper

Anion dependent silver(I) complexes of pyrazine mono-N-oxide

Pyrazine mono-N-oxide reacts with silver salts to form either discrete complexes involving monodentate N-coordination or 1D coordination polymers in which the ligand acts in a N,O-bridging bidentate coordination mode.

Graphical abstract: Anion dependent silver(i) complexes of pyrazine mono-N-oxide
Paper

New insights into dihydrogenphosphate recognition with dirhenium(I) tricarbonyl complexes bridged by a thiourea moiety

Three thiourea ligands and their dirhenium(I) complexes are reported that show an unusual cooperative binding to two dihydrogenphosphate anions; this could explain the high selectivity for phosphate in many reported anion receptors.

Graphical abstract: New insights into dihydrogenphosphate recognition with dirhenium(i) tricarbonyl complexes bridged by a thiourea moiety
Open Access Paper

The versatility of “click” reactions: molecular recognition at interfaces

“Click” reactions allow functionalizing azide-terminated gold surfaces with host and guest molecules to examine molecular recognition at interfaces.

Graphical abstract: The versatility of “click” reactions: molecular recognition at interfaces
Paper

An octahedral aluminium(III) complex as a three-fold node for supramolecular heterometallic self-assemblies: solution and solid state chemistry

A ligand possessing two orthogonal metal binding sites is designed to bind three-fold and four-fold symmetric metal ions in such a way as to form a cage.

Graphical abstract: An octahedral aluminium(iii) complex as a three-fold node for supramolecular heterometallic self-assemblies: solution and solid state chemistry
Open Access Paper

Melting temperatures deduced from molar volumes: a consequence of the combination of enthalpy/entropy compensation with linear cohesive free-energy densities

Exploiting a simple harmonic potential for modelling intermolecular interactions results in chemically intuitive correlations connecting molecular volumes with melting enthalpies and entropies.

Graphical abstract: Melting temperatures deduced from molar volumes: a consequence of the combination of enthalpy/entropy compensation with linear cohesive free-energy densities
Paper

BODIPY dyes functionalized with 2-(2-dimethylaminophenyl)ethanol moieties as selective OFF–ON fluorescent chemodosimeters for the nerve agent mimics DCNP and DFP

Hand held sensing kits for detecting nerve agents simulants.

Graphical abstract: BODIPY dyes functionalized with 2-(2-dimethylaminophenyl)ethanol moieties as selective OFF–ON fluorescent chemodosimeters for the nerve agent mimics DCNP and DFP
Paper

Preparation of open and closed forms of the lvt network with Cu(II) complexes of structurally related 1,2-diazole ligands

Two Cu(II) coordination polymers prepared from 1H-indazole-3-carboxylic acid and 1H-pyrazole-3-carboxylic acid form 3-D coordination polymers described by the lvt topology, and their frameworks are either of closed or open forms, respectively.

Graphical abstract: Preparation of open and closed forms of the lvt network with Cu(ii) complexes of structurally related 1,2-diazole ligands
Open Access Paper

The one pot synthesis of heterobimetallic complexes from a homoditopic pyrimidine–hydrazone ligand

Three new heterobimetallic complexes have been synthesised facilely in high yield and purity from a symmetric homoditopic pyrimidine-hydrazone ligand in a one-pot, two step reaction.

Graphical abstract: The one pot synthesis of heterobimetallic complexes from a homoditopic pyrimidine–hydrazone ligand
Paper

Acid-induced formation of hydrogen-bonded double helix based on chiral polyphenyl-bridged bis(2,2′-bipyridine) ligands

Chiral polyphenyl-bridged bis(2,2′-bipyridine) ligands L2–4 give intense CD signals when protonated with tetrachloroferric acid or perchloric acid. X-ray crystal structure of [(L2)2H2](FeCl4)2 shows that a double-stranded helix stabilized by both interior and exterior hydrogen bonding is formed. Theoretical DFT calculations show that such stabilization exists in solution.

Graphical abstract: Acid-induced formation of hydrogen-bonded double helix based on chiral polyphenyl-bridged bis(2,2′-bipyridine) ligands
Paper

Bis-triazolium containing macrocycles, pseudorotaxanes and interlocked structures for anion recognition

The use of the bis-triazolium motif to prepare potent anion receptors is described. A bis-triazolium axle containing rotaxane exhibits selective halide anion recognition in competitive solvent media.

Graphical abstract: Bis-triazolium containing macrocycles, pseudorotaxanes and interlocked structures for anion recognition
Paper

Assembling model tris(bipyridine)ruthenium(II) photosensitizers into ordered monolayers in the presence of the polyoxometallate anion [Co4(H2O)2(α-PW9O34)2]10−

Model ruthenium(II) photosensitizers with long alkyl chains are assembled into ordered monolayers on water with or without an anionic polyoxometallate. LB films on mica substrates are visualized using AFM.

Graphical abstract: Assembling model tris(bipyridine)ruthenium(ii) photosensitizers into ordered monolayers in the presence of the polyoxometallate anion [Co4(H2O)2(α-PW9O34)2]10−
Paper

Insight into the dynamic ligand exchange process involved in bipyridyl linked arene ruthenium metalla-rectangles

Ligand exchange processes of metalla-rectangles have been explored using 1H/2D isotope labelling, showing that ligand exchange does not proceed spontaneously.

Graphical abstract: Insight into the dynamic ligand exchange process involved in bipyridyl linked arene ruthenium metalla-rectangles
Paper

An anion-binding fluorinated alcohol isophthalamide isostere

The anion complexation properties of a fluorinated alcohol that is isosteric with a simple isophthalamide revealed that the alcohol can complex weakly basic anions with stability constants greater than those of the isophthalamide.

Graphical abstract: An anion-binding fluorinated alcohol isophthalamide isostere
22 items

About this collection

Welcome to this themed collection ‘Supramolecular chemistry: self-assembly and molecular recognition,’ Guest Edited by Professor Mike Ward (University of Sheffield, UK). The articles presented here cover many aspects of the formation of, and molecular recognition with, non-covalent self-assembled systems. Systems studied span the range of supramolecular assemblies from MOFs to gels, and potential applications or functional behaviour that are on display here include host/guest chemistry, spin crossover, molecular sensors, and extraction/separation. This collections of articles powerfully illustrates the diversity and increasing importance of supramolecular chemistry, and we hope you enjoy reading it.

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