硒杂环—金属离子在乙醇溶液中的紫外吸收光谱  

The UV Spectra of Heterocyclic Selenium Compounds and Metallic Ions in Ethanol Solutions

作　　者：郑文杰[1] 曾鑫华[1] 杨芳[1] 贺鸿志[1] 白燕[1] 李毅群[1] 郭宝江[2] 

机构地区：[1]暨南大学化学系,广东广州510632 [2]华南师范大学生物技术研究所,广东广州510631

出　　处：《光谱学与光谱分析》2004年第4期470-473,共4页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金项目 (2 0 2 71 0 2 2 );广东省自然科学基金项目 (0 1 0 369)资助

摘　　要：研究了不同分子结构的硒杂环化合物—金属离子在乙醇溶液中的紫外吸收光谱 ,硒杂环均为苤硒脑类化合物 (piazselenoles,简称Pis) :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) ;4 ,4 ' dipiazselenole(DP)。结果表明 :Pis随分子共轭体系增大或共轭效应增强 ,紫外吸收波长λ呈现有规律地红移 ,摩尔吸光系数ε增大 ;Sn(Ⅳ ) ,Cd(Ⅱ ) ,Cr(Ⅲ ) ,Sb(Ⅲ ) ,Fe(Ⅲ ) ,Fe(Ⅱ )及Cu(Ⅱ ) BP≥ 1均使BP的紫外吸收增强 ,Zn(Ⅱ )的影响较小。Sn(Ⅳ ) ,Cr(Ⅲ )和Sb(Ⅲ )均可使Pis的短波位置的紫外吸收增强 ,使MP于 2 33nm处的峰形变钝。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 lambda of piazselenoles were bathochromic and their epsilon increased with the increased conjugative effect; (2) Sn(IV) enhanced the UV absorption of piazselenoles at higher frequencies with the ratio of n(Sn(IV))/n(PS) 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.

关 键 词：硒杂环化合物 金属离子 苤硒脑 乙醇 紫外吸收光谱 

分 类 号：O626[理学—有机化学]