FEMTOSECOND INFRARED-SPECTROSCOPY - ULTRAFAST PHOTOCHEMISTRY OF IRON CARBONYLS IN SOLUTION
FEMTOSECOND INFRARED-SPECTROSCOPY - ULTRAFAST PHOTOCHEMISTRY OF IRON CARBONYLS IN SOLUTION
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DOI：
10.1021/j100155a017
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发表时间：
1991-01-24
影响因子：
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通讯作者：
HOCHSTRASSER, RM
中科院分区：
文献类型：
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作者：
ANFINRUD, PA;HAN, CH;HOCHSTRASSER, RM
用新型飞秒红外光谱仪研究了环己烷中环戊二烯基铁二羰基二聚体的光化学。 可见光 (580 nm) 光解通过持续约 1 ps 的激发束缚态进行。 解离通过多个通道发生，并建议产生单桥和/或非桥二聚体和均裂物种。 新生碎片的溶解显然在 5 ps 左右开始，并在 10 ps 左右接近完成。 这种溶剂化的延迟可能会出现，因为可见光激发产生具有足够过量能量的光产物，以抑制较早时间与溶剂的络合。 大约一半的光解二聚体在几乎等于 20 ps 的时间内成对重组，大概是通过单桥中间体。 因此，单桥光产物不会参与与稀释物质的光引发双分子化学反应。
The photochemistry of cyclopentadienyliron dicarbonyl dimer in cyclohexane has been investigated with a novel femtosecond infrared spectrometer. Visible (580 nm) photolysis proceeds through an excited bound state that persists for about 1 ps. Dissociation occurs through more than one channel and is suggested to generate singly bridged and/or nonbridged dimers and homolytically cleaved species. Solvation of the nascent fragments apparently begins around 5 ps and nears completion around 10 ps. This delay in solvation may arise because visible excitation generates photoproducts with sufficient excess energy to inhibit complexation with the solvent at earlier times. Roughly half of the photodissociated dimers recombine geminately within almost-equal-to 20 ps, presumably through a singly bridged intermediate. Therefore, singly bridged photoproducts would not participate in photoinitiated bimolecular chemical reactions with diluted species.