Crystal Structure and Properties of Coordination Polymer; {[Co(μ-4,4′- bipy)(4,4′-bipy)2(H2O)2]·(4,4′-bipy)·(H2O)4·(OH)3·(Me)4N}n

Abstract

Abstract: A novel Co(Ⅱ) coordination polymer was hydrothermally synthesized and characterized. The crystal crystallizes in the monoclinic system, space group C_c with a =1.772 59(4)_nm, b = 1.150 00(10)_nm , c =2.452 76(11)_nm, β =92.723(3)°, V =4.994 3 nm³, Z =4, R =0.080 9, wR =0.213 4. The polymer based on [Co(μ 4,4′ bipy)(4,4′ bipy)₂((H₂O)₂]_n linear chains was cross linked by the H bond bridge of Co—OH₂…4,4′ bipy—Co and π-π stacking interaction, producing extended 2D ladder structure. The susceptibility of the polymer at variable temperature(2.0_300 K) shows a weak antiferromagnetic interaction and implies that the polymer has the tendency of spin transition. Also, the result of surface photovoltage spectroscopy(SPS) reveals that the polymer has a significant photo electronic transferring property in UV Vis regions, which correspond to π-π transition, L-M charge transfer transition(shoulder) and d-d transition of Co²⁺ion, respectively.

Key words: Co(Ⅱ) coordination polymer, Crystal structure, Magnetism, Photoelectronic property

CLC Number:

O614

TrendMD:

JIN Jing, NIU Shu-Yun, YANG Zhong-Zhi, YANG Guang-Di, YE Ling . Crystal Structure and Properties of Coordination Polymer; {[Co(μ-4,4′- bipy)(4,4′-bipy)₂(H₂O)₂]·(4,4′-bipy)·(H₂O)₄·(OH)₃·(Me)₄N}_n[J]. Chem. J. Chinese Universities, 2004, 25(3): 418.

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Crystal Structure and Properties of Coordination Polymer; {[Co(μ-4,4′- bipy)(4,4′-bipy)₂(H₂O)₂]·(4,4′-bipy)·(H₂O)₄·(OH)₃·(Me)₄N}_n

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