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基于镉、烟酸乙酯和硫氰酸根配体的纳米超分子配位聚合物作为高效催化剂对废水中有害元素的去除协同作用。

Synergistic impact of nano-supramolecular coordination polymer based on cadmium, ethyl nicotinate and thiocyanate ligands as efficient catalyst to remove harmful elements from wastewater.

作者信息

Saleh Dalia I, Mahmoud Samy F, Etaiw Safaa Eldin H

机构信息

Department of Chemistry, College of Science, Taif University P.O. Box 11099 Taif 21944 Saudi Arabia

Department of Biotechnology, College of Science, Taif University P.O. Box 11099 Taif 21944 Saudi Arabia

出版信息

RSC Adv. 2024 Oct 4;14(43):31471-31485. doi: 10.1039/d4ra05068a. eCollection 2024 Oct 1.

DOI:10.1039/d4ra05068a
PMID:39372049
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11450447/
Abstract

Under ultrasonication, cadmium nitrate tetrahydrates, ethyl nicotinate (EN), and potassium thiocyanate as connecting ligand self-assembled to form the nanosized supramolecular coordination polymer (NSCP1) and the crystalline supramolecular coordination polymer (SCP1) [Cd(EN)(SCN)]. Single crystal SCP1 X-ray diffraction (XRD) revealed that Cd has an octahedral shape. The network structure of SCP1 is composed of chair conformation cyclic [Cd(SCN)] building blocks that form a one dimensional (1D) chain with bilaterally coordinated EN. The 1D-chain is joined to the other by extensive hydrogen bonds, which arrange the chains into a three-dimensional network. By stacking π-π, the strands are fluttering the three-dimensional (3D) network even more. Several structural characterization methods and spectral analyses were used to analyze SCP1 and NSCP1. The heterogeneous catalysts SCP1 and NSCP1 have been shown to display exceptionally strong catalytic activity against the breakdown of the designated contaminant, indigo carmine (IC) color in very short durations under ultraviolet (UV) or ultrasonic wave conditions. The photoluminescence probing approach was utilized to determine the reactive oxygen species and reaction process using the disodium salt of terephthalic acid.

摘要

在超声作用下，四水合硝酸镉、烟酸乙酯（EN）和硫氰酸钾作为连接配体自组装形成纳米级超分子配位聚合物（NSCP1）和晶体超分子配位聚合物（SCP1）[Cd(EN)(SCN)]。单晶SCP1的X射线衍射（XRD）表明Cd呈八面体形状。SCP1的网络结构由椅式构象的环状[Cd(SCN)]结构单元组成，这些结构单元与双边配位的EN形成一维（1D）链。一维链通过广泛的氢键相互连接，将链排列成三维网络。通过π-π堆积，这些链进一步构建起三维（3D）网络。采用多种结构表征方法和光谱分析对SCP1和NSCP1进行分析。已证明非均相催化剂SCP1和NSCP1在紫外（UV）或超声波条件下，能在极短时间内对指定污染物靛蓝胭脂红（IC）的分解表现出极强的催化活性。利用光致发光探测方法，使用对苯二甲酸二钠盐来确定活性氧物种和反应过程。

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