A determination of the structure of the intramolecular charge transfer state of 4-dimethylaminobenzonitrile (DMABN) by time-resolved resonance Raman spectroscopy

被引：95

作者：

Kwok, WM

Ma, C

Matousek, P

Parker, AW

Phillips, D

Toner, WT

Towrie, M

Umapathy, S

机构：

[1] Univ London Imperial Coll Sci Technol & Med, Dept Chem, London SW7 2AY, England

[2] Rutherford Appleton Lab, Cent Laser Facil, CLRC, Didcot OX11 0QX, Oxon, England

[3] Univ Oxford, Dept Phys, Clarendon Lab, Oxford OX1 3PU, England

[4] Indian Inst Sci, Dept Inorgan & Phys Chem, Bangalore 560012, Karnataka, India

来源：

JOURNAL OF PHYSICAL CHEMISTRY A | 2001年 / 105卷 / 06期

关键词：

D O I：

10.1021/jp003705w

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Picosecond time-resolved resonance Raman spectra of the A (intramolecular charge transfer, ICT) state of DMABN, DMABN-d(6) and DMABN-N-15 have been obtained. The isotopic shifts identify the nu (s)(ph-N) mode as a band at 1281 cm(-1). The similar to 96 cm(-1) downshift of this mode from its ground state frequency rules out the electronic coupling PICT model and unequivocally supports the electronic decoupling TICT model. However, our results suggest some pyramidal character of the A state amino conformation.

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页码：984 / 990

页数：7

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