含取代基碲碳菁染料的研究

本文报道了含取代基碲碳菁染料(8a～b)的合成方法。4－氯苯胺用等摩尔的乙酸汞、氯化锂及过量的乙酸酐处理可高收率地得到芳基氯化汞(2)。2 在冰乙酸中与等摩尔的四氯化碲回流生成3(内盐)。以水合肼还原3得到化合物4，后者可进一步用硼氢化钠还原并用碘甲烷烷化生成5。化合物6可在不同条件下分别由3、4或5得到。在碘甲烷或碘乙烷作用下，6可以烷基化生成季铵盐(7a～b)，后者与原甲酸乙酯在乙酸酐中缩合即生成对称的碲碳菁染料(8a～b)。对染料的可见吸收光谱也进行了讨论。     

含甲基及羟基取代碲碳菁染料的合成与性能

用碘甲烷及碘乙烷与２，５，６－三甲基苯碲唑、２－甲基。５－羟基苯并碲唑反应，合成了４种苯并碲唑碘化季铵盐。进一步与原甲酸乙酯反应制得了相应的新型碲碳菁染料。测定了它们在不同溶剂中的可见吸收光谱，讨论了取代基及溶剂对最大吸收波长的影响。     

Synthesis and light absorption of benzotellurazole crown ether cyanine dye

Various methods for synthesis of 2-methyl-5,6-(1,4,7,10,13-pentaoxatridecamethyl-ene)benzotellurazole (8) are described. Under different conditions, alkylation of compound 8 with methyl iodide gave telluronium salt 1,2-dimethyl-5,6-(1,4,7,10,13-pentaoxatridecamethylene)benzo-tellurazolium iodide (15) or quaternary ammonium salt 2,3-dimethyl-5,6-(1,4,7,10,13-pentaoxatri-decamethylene)benzotellurazolium iodide (14) in high yields, repectively. The cyanine dye 3,3'-dimethyl-5,6,5',6'-bis(1,4,7,10,13-pentaoxatridecamethylene)telluracarbocyanine iodide (16) is obtained by condensation of 14 with ethyl orthoformate in acetic anhydride. The visible absorption of the cyanine dye is also discussed.