【作者】 林以玑； 王振； 张汉辉； 陈义平； 曹彦宁； 程锦添；

【Author】 LIN Yi-ji, WANG Zhen, ZHANG Han-hui , CHEN Yi-ping, CAO Yarr-ning, CHENG Jin-tian Department of Chemistry, Fuzhou University, Fuzhou 350002, China

【机构】 福州大学化学系；

【摘要】 利用水热法分别合成了具有二维四方格子和一维链结构的配位聚合物[Co(PCPA)2(4,4’-bipy)]n1 和[Cu(PCPA)2(4,4’-bipy)]n2(PCPA,对氯苯氧乙酸)。在结构测定基础上,开展了温度微扰下的二维相关红外光谱研究。化合物1和2分别出现PCPA羧基反对称vas(COO),对称vs(COO)和醚键的红外伸缩振动峰,与其方式有关。二维相关红外光谱研究表明,化合物1和2羧基的伸缩振动和醚键在热扰动下变化较显著,化合物1出现1 653 cm-1较强的自动峰可能源于从桥式到单齿变化的羧基反对称伸缩振动。更多还原

【Abstract】 Two new coordination polymers, namely [Co(PCPA)2(4,4’-bp)]n 1 with 2D grids and [Cu(PCPA)2 (4,4’-bp)]n 2 with a linear chain, were synthesized under hydrothermal condition. Based on the determination of the structure, the 2D correlation FTIR spectra of the title compounds with the perturbation of temperature were investigated The IR spectra of 1 and 2 clearly show the presence of both the PCPA. The strong absorption at 1 603 and 1 424 cm-1 for 1, and 1 654 and 1 416 cm-1 for 2, corresponds to the asymmetrical vas(COO) and symmetrical vs(COO) stretching vibrations of the coordinated carboxylate groups. The differences between vas(COO) and vs(COO) are significantly, indicating a bridging coordination mode of carboxylate groups for 1 and monodentate coordination mode for 2. The strong C-O-C stretching vibrations of 2 at about 1 222 and 1 040 cm-1, suggest that the oxygen atom from phenoxyl coordinates with Cu2+. The 2D FTIR spectra indicate that the structure of complexes was influenced intensively by the perturbation of temperature.更多还原