Issue 25, 2018

Three Cd(ii) coordination polymers constructed from a series of multidentate ligands derived from cyclotriphosphazene: synthesis, structures and luminescence properties

Abstract

By utilizing three ligands derived from cyclotriphosphazene, three novel cadmium-based coordination polymers (CPs), namely, {[Cd3(L1)(H2O)5]}n (1), {[Cd4(H2L2)2(H2O)8]}n (2) and {[Cd2(H2L3)2(H2O)2]·(H2O)}n (3), (H6L1 = hexakis(4-carboxylatophenoxy)cyclotriphosphazene, H6L2 = hexakis(3-carboxylatophenoxy)cyclotriphosphazene, H6L3 = hexakis(4-(1H-tetrazol-5-yl)phenoxy)cyclotriphosphazene), have been successfully synthesized and structurally characterized. Their distinct topological architectures must be ascribed to the coordination conformations of the flexible ligands along with the different sites and coordination modes of the coordination groups. 1 exhibits a 3D topological structure based on the connection of trinuclear units and fully deprotonated L1 ligands. Just by changing the position of the carboxylate groups, a 2D layer structure with dinuclear units and partially deprotonated L2 ligands has been constructed. Comparably, by substituting the carboxylate by tetrazole groups, a distinct 3D structure with tetranuclear units has been synthesized. In addition, the three Cd CPs exhibit the corresponding photo-chemical properties in accordance with their structures.

Graphical abstract: Three Cd(ii) coordination polymers constructed from a series of multidentate ligands derived from cyclotriphosphazene: synthesis, structures and luminescence properties

Supplementary files

Article information

Article type
Paper
Submitted
06 Apr 2018
Accepted
10 May 2018
First published
16 May 2018

CrystEngComm, 2018,20, 3535-3542

Three Cd(II) coordination polymers constructed from a series of multidentate ligands derived from cyclotriphosphazene: synthesis, structures and luminescence properties

X. Chen, H. Dong, H. Peng, L. Hong, D. Luo, G. Zhuang and Q. Ye, CrystEngComm, 2018, 20, 3535 DOI: 10.1039/C8CE00537K

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