The optical size-dependent properties of pyrazolines nanocrystals

被引：16
|
作者：
Fu, HB [1 ]
Xie, RM [1 ]
Wang, YQ [1 ]
Yao, JN [1 ]
机构：
[1] Chinese Acad Sci, Inst Photog Chem, Ctr Mol Sci, Beijing 100080, Peoples R China
来源：
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS | 2000年 / 174卷 / 03期
基金：
中国国家自然科学基金;
关键词：
pyrazolines nanocrystals; PYA PYB nanocrystals; J-aggregrate; colloidal;
D O I：
10.1016/S0927-7757(00)00620-8
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Nanocrystals of 1-phenyl-3-(p-oxymethyl-styryl)-5-(p-oxymethyl-phenyl)-2-pyrazoline (PYB) with different sizes were prepared by the reprecipitation method. The aggregate formation of PYB nanocrystals was found to be J-aggregate, of which the wavelength of absorption peak was observed at about 430 nm. Further, we found that the PYB nanocrystals possess a special optical size-dependent property. As the nanocrystal size decreased, the molecular absorption peak of PYB nanocrystals was observed to shift to the high-energy side due to size effect and at the same time, the J-aggregate absorption peak gradually vanished. (C) 2000 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：367 / 373
页数：7
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