新型二芳基硫脲(DATU)/CdS复合纳米球的合成及取代基影响的研究

Synthesis of Diarylthiourea(DATU)/CdS Composite Nanoshperes and Effects of Groups on Benzene

摘要:

以CS2、CdCl2和芳胺为原料，采用液相原位沉淀法50℃下,在水-三乙醇胺（V水:V三乙醇胺=1:1）溶剂中合成了苯环4- (氢、甲基、甲氧基、氯、羧基)及3-硝基等N,N′-二芳基硫脲(DATU)/CdS有机-无机复合材料，采用扫描电子显微镜（SEM）、X射线衍射（XRD）、红外光谱（FT-IR）、热重（TG）、紫外-可见吸收光谱（UV-vis）、荧光光谱（PL）对产物形貌、结构和光学性能进行了表征。结果表明，DATU/CdS复合材料可以形成分散均匀的纳米球，含吸电子基的芳基硫脲能够有效阻止CdS粒子的聚集，提高粒子的分散性及使硫化镉的紫外吸收更大蓝移。DATU与硫化镉间存在较强的相互作用，这种作用可以提高DATU在复合材料中的热稳定性，并明显增强硫化隔粒子的529nm PL发射峰。

Abstract:

N,N′-diarylthiourea(DATU)/CdS with groups of 4-(H,Me,MeO,Cl and COOH) and 3-NO2 on benzene, the organic-inorganic nanocomposites, were successfully synthesized by reacting CS2 with aryl amines and CdCl2 at 50℃ in water and triethanolamine(TEA)（Vwater：VTEA=1:1）. The products were characterized by XRD, FT-IR, SEM, TG, UV–vis and PL. The results reveal the formation of the organic-inorganic nanocomposites in good disperse nanospheres. The electron-withdrawing groups on benzene effectively prevent the aggregation of DATU/CdS particles, thus resulting in good disperse spheres. Furthermore, bigger blue shift of CdS UV-Vis is also caused by electron-withdrawing groups. The strong interaction between DATU and CdS results in higher thermostability of DATU in nanocomposites and increasing intensity at 529nm PL emission peak.