Construction of two Zn(ii)/Cd(ii) multifunctional coordination polymers with mixed ligands for catalytic and sensing properties

Abstract

Two Zn(ii)/Cd(ii) coordination polymers with different networks were constructed with mixed ligands. The former compound shows high catalytic activity for Knoevenagel condensation, and the latter compound can selectively recognize l-cysteine through the luminescence quenching effect.

A new 2D cadmium coordination polymer based on hydroxyl‐substituted benzenedicarboxylic acid as an effective heterogeneous catalyst for Knoevenagel condensation

“…[33] The activity of these polymers is in good competition with other materials, not only by featuring high surface area and large pores, but also by bearing Lewis acidic (metal nodes) or basic sites (active functional moieties on linkers), performing appropriate electrostatic interactions. [34][35][36] Formation of carbon-carbon bonds by the reaction of aldehydes (C=O group) and active methylene compounds occurs under both acidic and basic conditions, known as Knoevenagel condensation. While the acid catalysts speed up the condensation through polarizing the carbonyl group of aldehyde, base catalysts active the methylene group initially for further nucleophilic attack on the C=O moiety of aldehyde.…”

Crystal structure of poly[diaqua-bis(μ2-3-((1H-imidazol-1-yl)methyl)benzoato-κ2 N:O)manganese(II)], C22H22MnN4O6

“…At present, many coordination polymers have been prepared by various organic ligands. Obviously, the design of suitable organic ligands and the reasonable selection of metal centers are crucial to the construction and structural tuning of the resulting complexes [8][9][10]. Organic ligands bearing imidazole and carboxylate groups separated by a -CH 2 -spacer can show versatile coordination modes, which makes it a useful linker to generate coordination polymers [11][12][13].…”

Crystal structure of the 2D coordination polymer poly[diaqua-bis(μ2-3- methoxyisonicotinato-κ2 N:O)cobalt(II)] — dimethylformamide (1/1), C20H30CoN4O10

“…In the past few decades, coordination compounds (CPs) have been becoming one of the most rapidly developing fields in chemical and material science not only because of their highly diversified topologies, but also due to their potential applications in many areas, such as magnetism [5,6], catalysis [6,7], luminescence [8,9], sensing [10,11], conductivity [12,13] and so on. At present, many multitopic organic ligands have been employed to prepare such materials and rapid progress in this flourishing field has been made [14,15].…”