scholarly journals Metal-Based Molecular Functional Materials - From Discrete Metal Complexes to Supramolecular Assembly, Nanostructures and Functions

2017 ◽  
Vol 69 (0) ◽  
pp. 21-28
Author(s):  
Vivian Wing-Wah Yam
Keyword(s):  
Metal Complexes ◽  
Supramolecular Assembly ◽  
Functional Materials

scholarly journals Core-Substituted Naphthalene-diimides (cNDI) and Related Derivatives: Versatile Scaffold for Supramolecular Assembly and Functional Materials

2021 ◽  
Author(s):  
Anurag Mukherjee ◽  
Suhrit Ghosh
Keyword(s):  
Photophysical Properties ◽  
Supramolecular Assembly ◽  
Functional Materials ◽  
Building Blocks ◽  
Short Review ◽  
Molecular Engineering ◽  
Organic Optoelectronics ◽  
Naphthalene Diimide ◽  
Naphthalene Diimides ◽  
Derivatives Of

Naphthalene-diimide (NDI) derived building blocks have been explored extensively for supramolecular assembly as they exhibit attractive photophysical properties, suitable for applications in organic optoelectronics. Core-substituted derivatives of the NDI chromophore (cNDI) differ significantly from the parent NDI dye in terms of optical and redox properties. Adequate molecular engineering opportunities and substitution-dependent tunable optoelectronic properties make cNDI derivatives highly promising candidates for supramolecular assembly and functional material. This short review discusses recent development in the area of functional supramolecular assemblies based on cNDIs and related molecules.

scholarly journals Supramolecular Assembly of Metal Complexes by (Aryl)I⋅⋅⋅d[Pt II ] Halogen Bonds

2020 ◽  
Vol 26 (34) ◽  
pp. 7692-7701 ◽  
Author(s):  
Eugene A. Katlenok ◽  
Matti Haukka ◽  
Oleg V. Levin ◽  
Antonio Frontera ◽  
Vadim Yu. Kukushkin
Keyword(s):  
Metal Complexes ◽  
Supramolecular Assembly ◽  
Halogen Bonds

Supramolecular assembly of melamine and its derivatives: nanostructures to functional materials

RSC Advances ◽  
2014 ◽  
Vol 4 (4) ◽  
pp. 1708-1734 ◽  
Author(s):  
Bappaditya Roy ◽  
Partha Bairi ◽  
Arun K. Nandi
Keyword(s):  
Supramolecular Assembly ◽  
Functional Materials

scholarly journals High-Spin Cobalt(II) Complex with Record-Breaking Anisotropy of the Magnetic Susceptibility According to Paramagnetic NMR Spectroscopy Data

2021 ◽  
Vol 47 (1) ◽  
pp. 10-16
Author(s):  
Ya. A. Pankratova ◽  
Yu. V. Nelyubina ◽  
V. V. Novikov ◽  
A. A. Pavlov
Keyword(s):  
Magnetic Susceptibility ◽  
Nmr Spectroscopy ◽  
Transition Metal ◽  
Metal Complexes ◽  
Transition Metal Complexes ◽  
Single Molecule ◽  
Functional Materials ◽  
Medical Diagnostics ◽  
Paramagnetic Nmr ◽  
Single Molecule Magnets

Abstract The tetrahedral cobalt(II) complex [CoL2](HNEt3)2 (I), where L is 1,2-bis(methanesulfonamido)benzene, exhibiting the properties of a single-molecule magnet is synthesized and characterized. The electronic structure parameters of complex I are determined by paramagnetic NMR spectroscopy. They completely reproduce the results of less available methods of studying single-molecule magnets. The value of axial anisotropy of the magnetic susceptibility estimated for complex I (Δχax = 34.5 × 10–32 m3 at 20°C) is record-breaking among all transition metal complexes studied by the NMR method, which provides wide possibilities for the use of complex I as a paramagnetic label for structural biology or as a contrast agent and even a temperature sensor for medical diagnostics. The data obtained indicate the advantages of paramagnetic NMR spectroscopy as a method of investigation of the magnetic properties and electronic structures of highly anisotropic transition metal complexes, which are precursors of many functional materials.

scholarly journals New types of the hybrid functional materials based on cage metal complexes for (electro) catalytic hydrogen production

2020 ◽  
Vol 92 (7) ◽  
pp. 1159-1174
Author(s):  
Yan Z. Voloshin ◽  
Vyacheslav M. Buznik ◽  
Alexey G. Dedov
Keyword(s):  
Metal Complexes ◽  
Hybrid Materials ◽  
Electrocatalytic Activity ◽  
Carbon Materials ◽  
Porous Ceramic ◽  
Functional Materials ◽  
Single Atom ◽  
Carbon Paper ◽  
Syngas Production ◽  
Catalytically Active

AbstractSuccessful using of cage metal complexes (clathrochelates) and the functional hybrid materials based on them as promising electro- and (pre)catalysts for hydrogen and syngas production is highlighted in this microreview. The designed polyaromatic-terminated iron, cobalt and ruthenium clathrochelates, adsorbed on carbon materials, were found to be the efficient electrocatalysts of the hydrogen evolution reaction (HER), including those in polymer electrolyte membrane (PEM) water electrolysers. The clathrochelate-electrocatalayzed performances of HER 2H+/H2 in these semi-industrial electrolysers are encouraging being similar to those for the best known to date molecular catalysts and for the promising non-platinum solid-state HER electrocatalysts as well. Electrocatalytic activity of the above clathrochelates was found to be affected by the number of the terminal polyaromatic group(s) per a clathrochelate molecule and the lowest Tafel slopes were obtained with hexaphenanthrene macrobicyclic complexes. The use of suitable carbon materials of a high surface area, as the substrates for their efficient immobilization, allowed to substantially increase an electrocatalytic activity of the corresponding clathrochelate-containing carbon paper-based cathodes. In the case of the reaction of dry reforming of methane (DRM) into syngas of a stoichiometry CO/H2 1:1, the designed metal(II) clathrochelates with terminal polar groups are only the precursors (precatalysts) of single atom catalysts, where each of their catalytically active single sites is included in a matrix of its former encapsulating ligand. Choice of their designed ligands allowed an efficient immobilization of the corresponding cage metal complexes on the surface of a given highly porous ceramic material as a substrate and caused increasing of a surface concentration of the catalytically active centers (and, therefore, that of the catalytic activity of hybrid materials modified with these clathrochelates). Thus designed cage metal complexes and hybrid materials based on them operate under the principals of “green chemistry” and can be considered as efficient alternatives to some classical inorganic and molecular (pre)catalysts of these industrial processes.

Emergent Supramolecular Assembly Properties of Recognition-Encoded Oligoesters

2019 ◽  
Author(s):  
Filip Szczypiński ◽  
Luca Gabrielli ◽  
Christopher Hunter
Keyword(s):  
Hydrogen Bonding ◽  
Three Dimensional ◽  
Supramolecular Assembly ◽  
Functional Materials ◽  
Intramolecular Hydrogen Bonding ◽  
Dimensional Structure ◽  
Stem Loop ◽  
Recognition Sites ◽  
Hydrogen Bonding Interactions ◽  
Intramolecular Hydrogen

The sequences of oligomeric molecules equipped with interacting side-chains encode the three-dimensional structure, the supramolecular assembly properties, and ultimately function. In an attempt to replicate the duplex forming properties of nucleic acids, an oligoester containing an alternating sequence of hydrogen bonding donor (<b>D</b>) and acceptor (<b>A</b>) residues was synthesised. Characterisation of assembly properties of the <b>ADAD</b> oligomer revealed a supramolecular architecture that resembles the kissing stem-loops motif found in folded RNA. NMR dilution and melting experiments in chloroform and 1,1,2,2-tetrachloroethane show that intramolecular hydrogen bonding interactions between the terminal phenol and phosphine oxide recognition sites in the <b>ADAD</b> 4-mer leads to 1,4-folding. This folded stem-loop structure can be denatured to give the single strand by heating. At higher concentrations or lower temperatures, the stem-loop dimerises via intermolecular hydrogen bonding interactions between the two inner recognition sites, leading to a kissing stem-loops structure. The results suggest a rich supramolecular chemistry for these recognition-encoded oligoesters and lay strong foundations for the future development of new functional materials based on synthetic information molecules.

Irᴵᴵᴵ as a Strategy for Preorganization in H-Bonded Motifs

2019 ◽  
Author(s):  
Barbora Balonova ◽  
Helena J. Shepherd ◽  
Christopher Serpell ◽  
Barry Blight
Keyword(s):  
Hydrogen Bonding ◽  
Metal Complexes ◽  
General Formula ◽  
Self Assembly ◽  
Structural Design ◽  
Functional Materials ◽  
Soft Materials ◽  
Thiourea Derivatives ◽  
Hydrogen Bonded Systems ◽  
Hydrogen Bonded

Here we present the synthesis and characterisation of four hydrogen bonded systems based on thiourea derivatives. These motifs are considered to be stable and desirable for supramolecular hydrogen-bonded functional materials. Interpretation of the structural design of thiourea based ligand and its incorporation into metal complexes can contribute to the understanding of preorganised self-assembly and open new pathways in design of novel soft materials. This work contributes to the unexplored library of hydrogen bonded metal complexes based on iridium. Further we examined the photoluminescence of the system of general formula [Ir(C^N)<sub>2</sub>(N^S)] and the effect of hydrogen bonding on the emission properties when combined with different <i>n</i>-heteroacenes.

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