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个人信息Personal Information
教授
博士生导师
硕士生导师
主要任职：中国化学会创始会士、常务理事，中国化工学会会士
性别：男
毕业院校：大连理工大学
学位：博士
所在单位：化工学院
学科：应用化学. 精细化工. 化学生物学
办公地点：大连理工大学西部校区知顺楼F-202#
http://peng-group.dlut.edu.cn/
联系方式：大连理工大学西部校区知顺楼F-202 辽宁省大连市高新区凌工路2号，大连116024 课题组网址：http://peng-group.dlut.edu.cn/ E-mail: pengxj@dlut.edu.cn
电子邮箱：pengxj@dlut.edu.cn
The ultrafast dynamics of near-infrared heptamethine cyanine dye in alcoholic and aprotic solvents
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论文类型：期刊论文
发表时间：2007-03-30
发表刊物：CHEMICAL PHYSICS
收录刊物：SCIE
卷号：333
期号：2-3
页面范围：179-185
ISSN号：0301-0104
关键字：the hydrogen bond; the heptamethine cyanine dye; the intramolecular vibrational redistribution; solvation; the femtosecond time-resolved stimulated emission pumping fluorescence depletion technique
摘要：The ultrafast dynamics of a synthesized near-infrared heptamethine cyanine dye has been studied in the typical alcoholic and aprotic solvents using the ferntosecond time-resolved stimulated emission pumping fluorescence depletion (FS TR SEP FD) technique. The faster decay on the hundreds of the ferritosecond time scale and the slower decay on the order of picosecond are found. The intramolecular vibrational redistribution (IVR) and the ultrafast solvent inertial relaxation should account for the faster decay, while the slower decay is attributed to the diffusive solvent relaxation. The time constants of the slower decay increase with the hydrogen-bonding energy in alcoholic solvent, and the time constants of the slower decay decrease with the dipole moments of the aprotic solvent molecules due to the interactions between the aprotic molecules and the excited dye molecule. (c) 2007 Elsevier B.V. All rights reserved.