Efficient Vibrational Energy Transfer through Covalent Bond in Indigo Carmine Revealed by Nonlinear IR Spectroscopy
文献类型：期刊论文
| 作者 | He, Xuemei1,2; Yu, Pengyun1,2; Zhao, Juan1,2; Wang, Jianping1,2 |
| 刊名 | JOURNAL OF PHYSICAL CHEMISTRY B
 |
| 出版日期 | 2017-10-12 |
| 卷号 | 121期号:40页码:9411-9421 |
| 英文摘要 | Ultrafast vibrational relaxation and structural dynamics of indigo carmine in dimethyl sulfoxide were examined using femtosecond pump-probe infrared and two-dimensional infrared (2D IR) spectroscopics. Using the intramolecularly hydrogen-bonded C=O and delocalized C=C stretching modes as infrared probes, local structural and dynamical variations of this blue dye molecule were observed. Energy relaxation of the vibrationally excited C=O stretching mode was found to occur through covalent bond to the delocalized aromatic vibrational modes On the time scale of a few picoseconds or less. Vibrational quantum beating was observed in magic-angle pump-probe, anisotropy, and 2D IR cross-peak dynamics, showing an oscillation period of ca. 1010 fs, which corresponds to the energy difference between the C=O and C=C transition frequency (33 cm(-1)). This confirms a resonant vibrational energy transfer happened between the two vibrators. However, a more efficient energy-accepting mode of the excited C=O stretching was believed to be a nearby combination and/or overtone mode that is more tightly connected to the C=O species. On the structural aspect, dynamical-time-dependent 2D IR spectra reveal an insignificant inhomogeneous contribution to time-correlation relaxation for both the C=O and C=C stretching modes, which is in agreement with the generally believed structural rigidity of such conjugated molecules. |
| 语种 | 英语 |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/41289]  |
| 专题 | 化学研究所_分子反应动力学实验室 |
| 作者单位 | 1.Chinese Acad Sci, Inst Chem, CAS Res Educ Ctr Excellence Mol Sci, Beijing Natl Lab Mol Sci,Mol React Dynam Lab, Beijing 100190, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | He, Xuemei,Yu, Pengyun,Zhao, Juan,et al. Efficient Vibrational Energy Transfer through Covalent Bond in Indigo Carmine Revealed by Nonlinear IR Spectroscopy[J]. JOURNAL OF PHYSICAL CHEMISTRY B,2017,121(40):9411-9421. |
| APA | He, Xuemei,Yu, Pengyun,Zhao, Juan,&Wang, Jianping.(2017).Efficient Vibrational Energy Transfer through Covalent Bond in Indigo Carmine Revealed by Nonlinear IR Spectroscopy.JOURNAL OF PHYSICAL CHEMISTRY B,121(40),9411-9421. |
| MLA | He, Xuemei,et al."Efficient Vibrational Energy Transfer through Covalent Bond in Indigo Carmine Revealed by Nonlinear IR Spectroscopy".JOURNAL OF PHYSICAL CHEMISTRY B 121.40(2017):9411-9421. |
入库方式： OAI收割
来源：化学研究所
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