Influence of 4-cyanopyridinium multicationic isomers on the structure–property relationships of two-dimensional hybrid as photocatalyst for the degradation of organic dyes

Abstract Via slow evaporation approach a series of organic cations as template agent were selected and introduced to self-assemble with metal pseudohalide to obtain 4 novel organic-inorganic hybrid supramolecules named {[O-CN] [Cu2(SCN)4] ·DMF }n (1), {[M-CN][Cu2(SCN)4]}n (2),{[P-CN][Cu2(SCN)4]}n (3), [ Multi-CN]0.5[Cu2(SCN)4]}n (4), (O-CN/ M-CN/ P-CN = α, α'-Bis (4-cyano-l-pyridino)-o/m/p-xylene, Multi-CN = 1, 2, 4, 5-four [(4-cyanopyridyl)-N-methylene] benzene). Structure analysis shows that compounds 1-4 are two-dimensional polypseudorotaxane structure. Their photocatalytic properties were explored and the results showed that complexes 1-3 exhibited high efficiency in degradation methylene blue and methyl orange under ultraviolet light.