A New Cd(II)-Based Coordination Polymer for Efficient Photocatalytic Removal of Organic Dyes

Abstract

Coordination polymers (CPs) are a diverse class of multi-dimensional compounds that show promise as photocatalysts for degrading dyes in polluted water. Herein, a new 1D Cd(II)-based coordination polymer with the formula [Cd(bpyp)(nba)2] (1) (bpyp = 2,5-bis(pyrid-4-yl)pyridine and Hnba = 4-nitrobenzoic acid) is synthesized and characterized. In 1, the two carboxyl groups of two different nba− ligands show μ2-η1:η1 and μ1-η1:η1 coordination modes to connect the CdII centers and sit on either side of the chain along the b direction. The produced CP 1 was utilized as the photocatalyst in the process of the photodegradation of methyl blue (MB), methyl orange (MO), rhodamine B (RhB), and methyl violet (MV) dyes when exposed to UV light. The photocatalytic degradation activities of CP 1 were analyzed, and the results suggest that it exhibits an extraordinary efficiency in the degradation of MB, MV, MO, and RhB. RhB has a 95.52% efficiency of degradation, whereas MV has a 58.92% efficiency, MO has 35.44%, and MB has 29.24%. The photodecomposition of dyes is catalyzed mostly by •O2− and •OH−, as shown by research involving the trapping of radicals.

Impact of N-donor auxiliary ligands on three new Co(ii)-based coordination polymers with symmetrical tetracarboxylate ligands: a magnetism study

“…Our research focuses on the exploration of under investigated polycarboxylic acid blocks for the design of new CPs. 12,13 Herein, we have chosen 5,5′-(ethene-1,2-diyl)diisophthalic acid (Scheme 1), namely (H 4 L), and explored its potential application in the hydrothermal generation of Co( ii )-based CPs. In order to select H 4 L as a principal block, the below characteristics have been considered: 14–16 (1) this carboxylic acid shows eight possible coordination sites (eight carboxylate oxygen donors), which can generate diverse coordination modes; (2) the H 4 L linker shows two aromatic rings that cannot rotate or twist to inhibit the generation of the interpenetration mode due to a rigid and full framework; and (3) the coordination chemistry of this building block is still unexplored.…”

Recent advances in Zn-MOFs and their derivatives for cancer therapeutic applications

“…They are a good choice as a carrier for the delivery of substances such as drugs, photosensitisers and contrast agents. They are also widely used in sensing, 3 catalysis, 4 magnetism, 5 and gas storage. 6 In addition, metal–organic frameworks (MOFs) have been tremendously used in cancer therapeutic applications.…”

Current status of Fe-based MOFs in biomedical applications

“…22–27 MOFs have been extensively studied because of their remarkable properties like flexible framework, large effective external surface, controllable size distribution, and good biocompatibility. 28–32 Thus, some MOFs are biomedically favorable for drug delivery and cancer therapy. 33–35…”