Shape-Controlled Micro-Crystals of Chain-Like Zn(II) Coordination Polymer [Zn(NIA)EDA]∝ and Its Catalytic Performance

Abstract

In this study, a new Zn coordination polymer (Zn-CP), hereafter, 1Zn, was successfully assembled in a solvothermal system, exhibiting one-dimensional extended chains. 1Zn morphologies were controlled by temperature and surfactants. In addition, the catalytic performance of 1Zn microsized CP was investigated. Knoevenagel condensation after 4 h afforded a conversion of 86%, and a conversion greater than 96% was obtained for 4-chlorobenzaldehyde and 4-bromobenzaldehyde because of their electron-withdrawing ligands. In addition, excellent selectivity was achieved for the degradation (64% conversion) of malachite green in aqueous solution. The microcrystal morphology affected the conversion, and a relative catalytic mechanism was proposed. The developed strategy of shape-controlled assembled CPs will certainly enhance new potential applications of micro-CPs.

Synthesis of multi-organo-functionalized fibrous silica KCC-1 for highly efficient adsorption of acid fuchsine and acid orange II from aqueous solution

“…To date, several removal methods including biosorption and adsorption 5 , 9 , 10 , ion-exchange 11 , 12 , catalytic degradation 13 – 15 , and membrane separation 16 , 17 have been studied and used to remove synthetic dyes from the aqueous environments. Among them, the adsorption technique has attracted a great deal of attention because it is a more efficient, simple, versatile, cost-effective, and best-suited process for the removal of synthetic dyes like AF and AO 9 , 18 – 20 .…”

Ferrocene-Functionalized Dithiocarbamate Zinc(II) Complexes as Efficient Bifunctional Catalysts for the One-Pot Synthesis of Chromene and Imidazopyrimidine Derivatives via Knoevenagel Condensation Reaction

“…Owing to the importance of these chromene and imidazopyrimidine derivatives in the pharmaceutical industry, the development of an efficient catalytic system for the synthesis of these organic molecules that especially operates under mild reaction conditions is needed, so as to lower the energy consumption and also production costs. A variety of metal–organic framework (MOF) catalysts, such as zeolite imidazolate frameworks, many solid-supported amine-functionalized catalysts, heterometallic catalysts, cation-exchange zeolites, and ionic liquids, have been utilized for this reaction . Albeit there are only a few examples of heterogeneous bifunctional catalysts, based on coordination polymers (CPs) having both active sites, i.e., coordinatively unsaturated metal centers acting as the Lewis acidic sites and free Lewis basic sites within the same molecular framework .…”