Synthesis, Structure, and Magnetic Properties of Crystalline Coordination Polymers of Copper(II), {[Cu(CA)(H2O)2(H2O)}nAND [Cu(CA)(MeOH)2n(H2CA; Chloranilic Acid)
作者:
Satoshi Kawata,
Susumu Kitagawa,
Isamu Furuchi,
Chihiro Kudo,
Hiroe Kamesaki,
Mitsuru Kondo,
Motomi Katada,
Megumu Munakata,
期刊:
Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals
(Taylor Available online 1995)
卷期:
Volume 274,
issue 1
页码: 179-185
ISSN:1058-725X
年代: 1995
DOI:10.1080/10587259508031879
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
Hydrogen bonded coordination polymers, {[CU(CA)(H2O)2(H2O)}n, [Cu(CA)(MeOH)2n(H2CA; chloranilic acid), and related polycrystalline analogs have been structurally and magnetically characterized. 1-Dimensional (1-D) weak antiferromagnetic exchange interaction (J= -2.01 cm−1) was observed in {[Cu(CA)(H2O)2(H2O)}n, which has a 3-dimensional hydrogen bond network in the crystal. This polycrystalline form liberates the water molecules to be [Cu(CA)n, which is known as the Heisenberg antiferromagnet. Powder X-ray diffraction and thermal data show that the framework constructed by 1-D chains are so stable that water molecules readily come out without breaking the 1-D chains. Two types of coordination polymers ([Cu(CA)(MeOH)2nand [Cu(CA)(MeOH)n) containing axially coordinated MeOH have been prepared. [Cu(CA)(MeOH)nhas strong and anomalous antiferromagnetic exchange interactions in the crystal, indicating a new phase of Cu/CA systems, such as a mixed valence state, and if so the coordinated MeOH plays an important role to control physical properties of the polymers.
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