Two 3D chiral coordination polymers with 4-connected 6(6) topological net: synthesis, structure and magnetic properties.
The hydrothermal reaction of Co(II)/Cu(II), 5-hydroxyisophthalic acid and dipyridophenazine leads to the generation of two 3D chiral coordination polymers, [M(hip)(DPPZ)](n) (M = Co(), Cu(), H(2)hip = 5-hydroxyisophthalic acid, DPPZ = dipyridophenazine), which contain M-hip-M helical chains (M = Co, Cu) and possess a new four-connected 6(6) topological net. The resulting crystals were not a racemic mixture but an enantiomeric excess, which was confirmed by the measurement of optical rotation of the bulk samples using solid state vibrational circular dichroism (VCD) and solid circular dichroism (CD) based on the large crystals from one crystallization. The magnetic properties of 1 and 2 have been investigated by variable-temperature magnetic susceptibility and magnetization measurements, and the results reveal that antiferromagnetic interactions exist in 1 and 2.
Han
Zheng-Bo
ZB
College of Chemistry, Liaoning University, Shenyang, 110036, PR China. ceshzb@lnu.edu.cn
Ji
Jian-Wei
JW
An
Hai-Yan
HY
Zhang
Wei
W
Han
Guang-Xi
GX
Zhang
Guo-Xin
GX
Yang
Li-Guo
LG