以均苯三甲酸为内核的树形分子为模板制备AgI纳米簇  

Preparation and characterization of AgI nanoclusters with PAMAM dendrimers with a trimesyl core(DT)as template

作　　者：沈莹[1] 徐勤[1] 高欢[1] 祝宁宁[1] 

机构地区：[1]上海师范大学生命与环境科学学院,上海200234

出　　处：《上海师范大学学报（自然科学版）》2007年第4期78-82,共5页Journal of Shanghai Normal University(Natural Sciences)

摘　　要：采用以均苯三甲酸为内核的树形分子(DT)模板法,原位制备AgI纳米簇,得到AgI/ DT纳米复合材料.研究了AgI纳米簇生成过程中的各种影响因素,并用紫外-可见光谱、荧光光谱、透射电镜等对所制备的纳米簇进行表征.实验发现,在中性条件下,DT4.5本身有较强的荧光,当与银离子络合后,其荧光强度明显降低,而生成AgI/DT4.5后,荧光强度进一步降低,同时出现由于AgI纳米簇表面电荷转移所产生的新的荧光峰.当Ag^+与树形分子摩尔比为30:1时所制得的AgI纳米簇的粒径小,分布均匀,稳定性好.PAMAM dendrimers with a trimesyl core （DT） were used as templates in preparing AgI nanoclusters, which were characterifed by UV -Vis spectrophotometer, fluorescence spectrophotometer and TEM. Under the neutral conditions, the fluorescence intensity of DT4.5 dendrimers is stronger than that of the Ag＋/DT4.5 and further decreased in the AgI/DT4.5. The resuiting AgI nanoclusters were stable and showed a narrow distribution size at the Ag ＋/DT4.5 ratio of 30.

关 键 词：树形分子 碘化银纳米簇 纳米复合粒子 模板 荧光 

分 类 号：O611.4[理学—无机化学]