ULTRAFAST INFRARED STUDY OF THE ULTRAVIOLET PHOTODISSOCIATION OF MN2(CO)10
ULTRAFAST INFRARED STUDY OF THE ULTRAVIOLET PHOTODISSOCIATION OF MN2(CO)10
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MN2(CO)10 紫外光解离的超快红外研究
DOI：
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发表时间：
1996
期刊：
影响因子：
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通讯作者：
A. Baronavski
中科院分区：
文献类型：
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作者：
J. Owrutsky;A. Baronavski
使用超快红外光谱研究了脱羰基二锰 Mn2(CO)10 在环己烷中的 310 nm 光解离。在羰基伸缩振动区域中，5 μm 附近的亚皮秒红外检测是使用频率分辨宽 (>100 cm−1) 红外探针脉冲进行的。红外光谱的演变提供了有关 Mn2(CO)10 及其光产物的信息。在末端羰基区域（1970-2050 cm−1），由于母体化合物的损失而观察到漂白信号。广泛的、无特征的吸收迅速出现，并在振动冷却（50 ps 时间尺度）时变窄，以揭示与先前分配给两种光产物 Mn(CO)5 和 Mn2(CO)9 的红外光谱特征一致的红外光谱特征。漂白信号部分恢复，表明振动激发的 Mn2(CO)10 基态恢复，这与之前的双子重组报道一致。对于 2052 cm−1 处的终端 CO 频带，Mn2(CO)9 信号出现时间为 54(4) ps，对于桥接频带，Mn2(CO)9 信号出现时间为 31(5) ps...
The 310 nm photodissociation of dimanganese decarbonyl, Mn2(CO)10, in cyclohexane has been studied using ultrafast infrared spectroscopy. Subpicosecond IR detection near 5 μm, in the region of carbonyl stretch vibrations, is carried out using a frequency‐resolved broad (>100 cm−1) IR probe pulse. The evolution of infrared spectra provide information on Mn2(CO)10 and its photoproducts. In the terminal carbonyl region (1970–2050 cm−1), bleach signals are observed due to loss of the parent compound. A broad, featureless absorption appears promptly and narrows upon vibrational cooling (on the 50 ps time scale) to reveal IR spectral features consistent with those previously assigned to two photoproducts, Mn(CO)5 and Mn2(CO)9. The bleach signals partially recover, indicating ground state recovery of vibrationally excited Mn2(CO)10, which is consistent with previous reports of geminate recombination. Mn2(CO)9 signal appearance times are 54(4) ps for the terminal CO band at 2052 cm−1 and 31(5) ps for the bridge b...