Self‐assembly of Two Cobalt(II) Coordination Polymers Derived from Tetrabromoterephthalate and Flexible Bis(Benzimidazole) Co‐ligands

Abstract

Two new cobalt(II) coordination polymers, {[Co(L1)(tbta)]·0.8H2O}n (1) and {[Co(L2)(tbta)]·H2O}n (2) [L1 = 1,1′‐(1,3‐propanediyl)bis(2‐methylbenzimidazole), L2 = 1,2‐bis(2‐methylbenzimidazole‐1‐ylmethyl)benzene, H2tbta = tetrabromoterephthalic acid] were obtained under hydrothermal conditions and structurally characterized by single‐crystal X‐ray diffraction methods, IR spectroscopy, TGA, and elemental analysis. The cobalt atoms present similar environments with tetrahedral arrangements in 1 and 2. The two complexes show a 2D (4,4) coordination network with sql topology. Compound 2 is further extended into a rare 3,3,4T3 three‐dimensional supramolecular framework by weak C–H···O hydrogen bonding interactions. The fluorescence and catalytic properties of the complexes for the degradation of the congo red azo dye in a Fenton‐like process were investigated.

Tungsten Carbide–Nitride on Graphene Nanoplatelets as a Durable Hydrogen Evolution Electrocatalyst

“…Meanwhile, as an important family of multidentate O‐donor ligands, cyclohexanedicarboxylic acid, such as 1,4‐cyclohexanedicarboxylic acid (1,4‐H 2 chdc), 1,3‐cyclohexanedicarboxylic acid (1,3‐H 2 chdc), which can control conformation and conformational transformation in coordination networks due to their various coordination modes to metal ions, have been intensively investigated 17–19. However, only a few examples of the metal complexes based on flexible bis(benzimidazole) and 1,2‐cyclohexanedicarboxylic acid (1,2‐H 2 chdc) or aromatic 3‐nitrophthalic acid (H 2 npht) ligands were reported 20–22…”

Methods in Molecular Biology 969: Synthetic Messenger RNA and Cell Metabolism Modulation: Methods and Protocols. Edited by Peter M. Rabinovich.

“…The apical position is occupied by two oxygen atoms (O4 and O4 i ) from coordinated water molecules. The Co–N bond lengths range from 2.086 to 2.140 Å and the Co–O bond length is 2.089 Å, which are all in normal ranges 23,24. 2,4,3‐tpt acts as a chelate ligand binding to the central Co II atom forming a unit of [Co(2,4,3‐tpt) 2 (H 2 O) 2 ] 2+ with N triazole and N 2‐pyridyl .…”

Hydrothermal Synthesis, Crystal Structures, and Catalytic Properties of Three Coordination Polymers Containing ­Flexible Bis(benzimidazole) and Dicarboxylate Ligands

“…[17][18][19] However, only a few examples of the metal complexes based on flexible bis(benzimidazole) and 1,2-cyclohexanedicarboxylic acid (1,2-H 2 chdc) or aromatic 3-nitrophthalic acid (H 2 npht) ligands were reported. [20][21][22] In this work, flexible 1,2-bis(2-methylbenzimidazole-1-ylmethyl)benzene (L1) and 1,2-bis(5,6-dimethylbenzimidazole-1-ylmethyl)benzene (L2) (Scheme 1) were selected as N-donor auxiliary linkers and the ternary mixed-ligand MOCPs, namely www.zaac.wiley-vch.de…”