1.Department of Chemistry, Ji′nan University, Guangzhou 510632, China 2.Biotech Research Institute, South China Normal University, Guangzhou 510631, China
Abstract：The UV spectra of heterocyclic selenium compounds and metallic ions in ethanol solutions were investigated in this paper. Heterocyclic selenium compounds included 4,5-benzopiazselenole (BP), anthra [1, 2-c][1, 2, 5] selenadiazol-6, 11-dione(AS), piazselenole (PS), 5-methyl- piazselenole (MP), 4,6-diBr- piazselenole(DBP) and 4,4＇-dipiazselenole (DP). Several important results were obtained: (1)The absorption wavelengths λ of piazselenoles were bathochromic and their ε increased with the increased conjugative effect; (2) Sn(Ⅳ)enhanced the UV absorption of piazselenoles at higher frequencies with the ratio of nSn(Ⅳ)/nPS at 1; (3) The UV absorption of BP was obviously enhanced by Sn(Ⅳ)，Cd(Ⅱ)，Cr(Ⅲ)，Sb(Ⅲ)，Fe(Ⅲ)，Fe(Ⅱ)and Cu(Ⅱ), while Zn(Ⅱ)had little effect on the UV of BP;(4) The UV absorption of piazselenoles at higher frequencies was enhanced by Sn(Ⅳ)，Cr(Ⅲ) and Sb(Ⅲ), and the peak of MP at 233 nm was blunt in MP-M solutions.
[1] ZHENG Wen-jie, OUYANG Zheng(郑文杰，欧阳政). The Application of Plant Organic Selenium to Chemistry and Medicine(植物有机硒的化学及其医学应用). Guangzhou: Ji′nan University Prass(广州：暨南大学出版社). 2001. 97. [2] Klyman D L, Gunther W H H. Organic Selenium Compounds: Their Chemistry and biology, John Wiley ＆ Sons, INC, 1973. [3] XU Hui-bi, HUANG Kai-xun(徐辉碧，黄开勋). Selenium Chemistry, Biochemistry and Their Application to Life Science(硒的化学、生物化学及其在生命科学中的应用). Wuhan: Huazhong Science and Technology University Press(武汉：华中理工大学出版社), 1994. 86. [4] CAI Qian-tao，SHI Wen-zhao(蔡乾涛，施文赵). Analytical Laboratory(分析试验室)，1988，7(9)：26. [5] ZHENG Wen-jie，ZENG Xin-hua，GUO Bao-jiang et al(郑文杰，曾鑫华，郭宝江等). Spectroscopy and Spectral Analysis(光谱学与光谱分析)，2004，24(1): 102. [6] XIE Wen-lei，XU Wei-he，FENG Guang-zhu(谢文磊，徐卫河，冯光炷). Spectroscopy and Spectral Analysis(光谱学与光谱分析)，2001，21(5)：707. [7] Wrinnt M C, Whitehead M A. J. Chem. Soc. Faraday Trans.，1992, 88(18): 2641.
