Issue 40, 2014

Five solvent-induced cadmium coordination polymers (CPs) based on the same mixed ligands

Abstract

Five new solvent-induced cadmium coordination architectures, {[Cd(bib)(5-Br-H2ip)]·EtOH}n (1), {[Cd0.5(bib)0.5(5-Br-H2ip)0.5]·3H2O}n (2), {[Cd2(bib)(5-Br-H2ip)2(MeOH)]}n (3), {[Cd(bib)0.5(5-Br-H2ip)(H2O)2]·H2O}n (4), and {[Cd(bib)0.5(5-Br-H2ip)(H2O)]}n (5), have been constructed from the same materials (1,4-bis(2-methyl-imidazol-1-yl)butane (bib), 5-bromoisophthalic acid (5-Br-H2ip) and Cd(Ac)2·2H2O) under different reaction solvents. As controlled by solvent systems, compound 1 shows a 3-fold interpenetrating 3D framework based on the left- and right-handed helical chains, while compound 2 reveals a 3-fold interpenetrating 3D network and each single net is based on the left-handed, right-handed and meso-helical chains. Compound 3 is a 3D framework that can be simplified as a 6-connected net with (48·62) topology. Both 4 and 5 display 3D supramolecular frameworks through weak aromatic π–π stacking interactions and hydrogen bonding interactions. However, the topologies of 4 and 5 are definitely different. Compound 4 presents a 3-connected net with (82·10) topology, while compound 5 reveals a 4-connected net with (42·63·8) topology. The effects of solvents on the crystal structures were discussed and thermogravimetric analysis and solid-state photoluminescence results for 1–5 were investigated.

Graphical abstract: Five solvent-induced cadmium coordination polymers (CPs) based on the same mixed ligands

Supplementary files

Article information

Article type
Paper
Submitted
02 Jul 2014
Accepted
22 Aug 2014
First published
26 Aug 2014

CrystEngComm, 2014,16, 9560-9567

Five solvent-induced cadmium coordination polymers (CPs) based on the same mixed ligands

Y. Hou, B. Liu, K. Yue, C. Zhou, Y. Wang, N. Yan and Y. Wang, CrystEngComm, 2014, 16, 9560 DOI: 10.1039/C4CE01359J

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