物理化学学报2012，Vol.28Issue(4)：759-765,7.DOI:10.3866/PKU.WHXB201202023
二羰基茂铁二聚体[CpFe(CO)2]2的中红外泵浦探测光谱
Mid-Infrared Pump-Probe Spectroscopy of Dimeric r-Cyclopentadienyl-dicarbonyliron [CpFe(CO)2]2
摘要
Abstract
The structural and vibrational dynamics of the non-bridged C=O stretching vibrations of two different tautomers of dimeric 7T-cyclopentadienyldicarbonyliron [CpFe(CO)2]2 in CH2CI2 were examined using steady-state and femtosecond infrared pump-probe methods at 5-um wavelength. The two main species in [CpFe(CO)2]2 had a cislrans molar ratio of 1.7, and showed different vibrational and rotational relaxation dynamics. Both species showed biexponential decay in their two C=O stretching vibrational excited-state populations, with a fast component (<1 ps) and a slow component (20 ps). The former was believed to be related to the rapid dephasing processes of the coherent state caused by broadband excitation, while the latter was the typical lifetime for the CsO stretching vibrational excited state. Having a significant permanent dipole, the cis structure could interact strongly with solvent, resulting in relatively slower rotational dynamics. Our work demonstrated that the frequency and vibrational-rotational dynamics of the non-bridged C=O stretching vibrations were very sensitive to both molecular structures and the solvent.关键词
二羰基茂铁二聚体/飞秒红外泵浦探测光谱/振动弛豫动力学/分子结构动力学Key words
Dimeric rr-cyclopentadienyldicarbonyliron/ Femtosecond infrared pump-probe spectroscopy/ Vibrational relaxation dynamics/ Molecular structural dynamics分类
化学化工引用本文复制引用
杨帆,刘英亮,王建平..二羰基茂铁二聚体[CpFe(CO)2]2的中红外泵浦探测光谱[J].物理化学学报,2012,28(4):759-765,7.基金项目
国家自然科学基金(20727001),中国科学院知识创新工程(KJCX2-EW-H01)和中国科学院“百人计划”项目资助 （20727001）
