2,7-二乙烯吡啶基-9,9′-二乙基芴纳米颗粒的粒度测量及荧光光谱的研究

The Size Measurement and Fluorescence Spectral Studies of 2,7-Divinylpyridine-9,9′-diethylfluorene Nanoparticles

利用二次沉淀法制备出不同粒径（101．6-516．9nm）的2，7-二乙烯吡啶基-9，9′-二乙基芴有机纳米微粒。通过激光粒度仪测试发现：其平均粒度和多分散指数（PDI）值随着放置时间的增长、有机分子浓度的增大而增加；随放置温度的升高、表面活性剂的加入而减小。利用荧光光谱仪测试2，7-二乙烯吡啶基-9，9′-二乙基芴的氮甲基吡咯烷酮（NMP）溶液和2，7-二乙烯吡啶基-9，9′-二乙基芴纳米微粒体系的荧光激发和发射光谱，发现纳米微粒体系的荧光激发光谱和发射光谱分别在403、530nm附近出现新的电荷转移（CT）峰。

2, 7-divinylpyridine-9,9′-diethylfluorene nanoparticles were prepared by reprecipitation method. The average size and the polydispersity index （PDI） of nanoparticles, measured by Nano ZS900 laser granularity apparatus, increased with the increase of deposition time and the volume of organic solution, but decreased with the increase of temperature and the addition of surfactant. The fluorescence emission spectrum, measured by F-4500 spectrometer, had new charge-transfer（CT） peaks at 403 nm and 530 nm, respectively.