作者:Hiroji Hosokawa、Tomoyuki Ogata、Yuji Wada、Kei Murakoshi、Takao Sakata、Hirotaro Mori、Shozo Yanagida
DOI:10.1039/ft9969204575
日期:——
CdS nanocrystallites prepared by capping with pentafluorothiophenol, 2,3,5,6-tetrafluorothiophenol or 4-fluorothiophenol are characterized as quantum dots by TEM, FTIR, NMR, UV–VIS and fluorescence spectroscopy. The crystalline size tends to increase with an increase in the number of fluorine atoms in the capping molecules while maintaining high solubility in organic solvents, with solubility in alcohols depending on the number of fluorine atoms in the capping molecules. Pentafluorophenyl-capped CdS nanorystallites have the highest solubilities in alcohols, and exhibit quantum dot photocatalysis in methanol, leading to the efficient two-electron transfer photoreduction under visible-light irradiation.
通过使用五氟硫酚、2,3,5,6-四氟硫酚或4-氟硫酚作为包裹剂制备的硫化镉纳米晶,通过透射电子显微镜(TEM)、傅里叶变换红外光谱(FTIR)、核磁共振(NMR)、紫外-可见光谱(UV-VIS)和荧光光谱进行表征,被认定为量子点。晶体尺寸随着包裹分子中氟原子数量的增加而增加,同时保持了在有机溶剂中的高溶解性,其中在醇类中的溶解性取决于包裹分子中的氟原子数量。五氟苯基包裹的硫化镉纳米晶在醇类中具有最高的溶解性,并在甲醇中表现出量子点光催化活性,在可见光照射下实现了高效的双电子转移光还原反应。