Ultrafast proton transfer of 1-hydroxy-2-acetonaphthone:Reaction path from resonance Raman and transient absorption studies

S.Lochbrunner; A.Szeghalmi; K.Stock; M.Schmitt

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Ultrafast proton transfer of 1-hydroxy-2-acetonaphthone:Reaction path from resonance Raman and transient absorption studies

机译：1-羟基-2-乙酰萘酮的超快质子转移：共振拉曼和瞬态吸收研究的反应路径

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The intramolecular degrees of freedom contributing to the ultrafast excited-state intramolecular proton transfer of l-hydroxy-2-acetonaphthone are determined.Thereto,resonance Raman studies are combined with transient absorption measurements with 30-fs time resolution.Enhanced Raman intensity is found in coordinates that are dominantly associated with deformations and bond length changes in the naphthalene chromophore.This indicates that the primary changes after the optical excitation are a geometric relaxation of the chromophore.A ringing of the molecule after the ultrafast proton transfer is observed by the transient absorption measurements.It reveals the nuclear coordinates contributing to the reaction path beyond the Franck-Condon region.There,planar H-chelate ring deformations changing the donor-acceptor distance are found to dominate.The difference in the observed vibrational signatures indicates a significant turn in the reaction path.

机译：确定了促进l-羟基-2-乙酰萘酮超快激发态分子内质子转移的分子内自由度。据此，将共振拉曼研究与具有30fs时间分辨率的瞬态吸收测量相结合。坐标主要与萘发色团的变形和键长变化相关，这表明光激发后的主要变化是发色团的几何弛豫，通过瞬态吸收观察到超快质子转移后分子的振铃测量结果揭示了在Franck-Condon区域以外影响反应路径的核坐标。在那里，发现改变供体-受体距离的平面H螯合物环变形占主导地位。观察到的振动特征的差异表明反应路径。

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《The Journal of Chemical Physics》 |2005年第24期|共10页
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S.Lochbrunner; A.Szeghalmi; K.Stock; M.Schmitt;
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1. Ultrafast proton transfer of 1-hydroxy-2-acetonaphthone:Reaction path from resonance Raman and transient absorption studies [J] . S.Lochbrunner, A.Szeghalmi, K.Stock, The Journal of Chemical Physics . 2005,第24期

机译：1-羟基-2-乙酰萘酮的超快质子转移：共振拉曼和瞬态吸收研究的反应路径
2. Ultrafast time-resolved transient absorption and resonance Raman spectroscopy study of the photodeprotection and rearrangement reactions of p-hydroxyphenacyl caged phosphates [J] . Ma CS, Kwok WM, Chan WS, Journal of the American Chemical Society . 2006,第8期

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3. Ultrafast time-resolved transient infrared and resonance Raman spectroscopic study of the photo-deprotection and rearrangement reactions of p-hydroxyphenacyl caged phosphates [J] . Qian Cao, Xiangguo Guan, Michael W. George, Faraday discussions . 2010,第Null期

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4. Inter- and intramolecular processes in metalloporphyrins: study by transient absorption and resonance Raman and coherent anti-Stokes Raman scattering [C] . Pavel A. Apanasevich, V.S. Chirvony, Sergei G. Kruglik, Intermational conference on laser applications in life sciences . 1994

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机译：超快时间分离的瞬态吸收和共振拉曼光谱研究对羟基苯基磷酸盐的光电保护和重排反应

Ultrafast proton transfer of 1-hydroxy-2-acetonaphthone:Reaction path from resonance Raman and transient absorption studies

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