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Silver(I)‐Based Complexes Used as High‐Performance Photocatalysts for the Degradation of Organic Dyes in Water
Author(s) -
Liu ChaoFan,
Liu ChunYu,
Ren ZhiGang,
Lang JianPing
Publication year - 2019
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201900026
Subject(s) - chemistry , photodegradation , catalysis , deprotonation , photocatalysis , photochemistry , homo/lumo , density functional theory , degradation (telecommunications) , photocurrent , atom (system on chip) , ion , organic chemistry , molecule , computational chemistry , telecommunications , physics , optoelectronics , computer science , embedded system
Coordination compounds have been used as efficient photocatalysts for the degradation of pollutive organic dyes due to their semiconductive nature and diverse structures that may be adjusted by the central metals and ligands. Herein we prepared N′ , N′ ‐2,2‐tetrakis(diphenylphosphanylmethyl)thiocarbohydrazide ( tpptch ) and utilized it to react with AgX (X = Br, I, CN) in different solvent systems. These reactions afforded two dicationic tetranuclear complexes {[Ag 4 X 2 ( tpptch ) 2 ]X 2 ( 1 : X = Br; 2 : X = I)}, one 1D coordination polymer [Ag 2 I 2 ( tpptch )] n ( 3 ) and one neutral tetranuclear complex [Ag 4 (CN) 2 ( dptpptch ) 2 ] ( 4 , dptpptch is the anion of deprotonated tpptch after an enolization). In 1 – 4 , the S atom of the C=S group binds at one Ag I atom in 1 or 2 , or remains uncoordinated in 3 , or connects with two Ag I atoms after transforming into the C–S – end in 4 . The catalytic activities of these compounds toward the photodegradation of nine organic dyes under UV irradiation were examined, among which 3 showed the best performance. Their anodic photocurrent responses and HOMO–LUMO energy gaps derived from density functional theory (DFT) calculations correlated well with the photocatalytic activities. The different bindings of the S end of tpptch and dptpptch ligands with Ag I centers in 2 – 4 may be contributed to the discrepancy in their catalytic activities. The results provide a ready route to design and prepare highly stable and efficient photocatalysts for treating dye‐polluted water.