摘要
合成了粒径均匀和分散性好的CdS纳米粒子.通过改变CdS纳米粒子及半胱氨酸的浓度、体系的pH值及CdCl2和CH3CSNH2摩尔比等实验条件跟踪监测了CdS纳米粒子光谱性质的变化,探讨了CdS纳米粒子与半胱氨酸之间的相互作用及化学反应机理.
CdS nanoparticles were synthesized and their spectra properties were studied.At the same time, the interaction mechanisms between CdS nanoparticles and cysteine and cysteine were investigated under different experimental conditions such as pH values, concentrations of cysteine and molar ratios of CdCl2, CH3CSNH2. After cysteine being added to the CdS nanoparticles, the fluorescence intensity of CdS nanoparticles was stronger and their emission peak did not change at pH before isoelectric point, while the fluorescence intensity became stronger at the beginning and then quenched and the emission peak was red-shifted at pH values after isoelectric point. It＇s proved that coordination interaction and electrostatic interaction were the two interaction forms between CdS and cysteine, which influenced the variations of fluorescence intensity, emission peak and bandgap of CdS nanoparticles at different pH balues before and after isoelectric point.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
2005年第9期1618-1622,共5页
Chemical Journal of Chinese Universities
基金
国家自然科学基金(批准号:20375017
20445001和20375019)
高等学校博士学科点专项科研基金(批准号:2002055002)
天津市自然科学基金(批准号:033603511)资助.
