高等学校化学学报

高等学校化学学报 ›› 1993, Vol. 14 ›› Issue (11): 1583.

• 研究论文 • 上一篇    下一篇

低温基体隔离Mn2(CO)10的紫外激光光解

周鸣飞, 王悟敏, 余敏, 郑企克   

  1. 复旦大学激光化学研究室, 上海 200433
  • 收稿日期:1993-01-09 修回日期:1993-03-20 出版日期:1993-11-24 发布日期:1993-11-24
  • 通讯作者: 周鸣飞, 男, 25岁, 博士研究生.
  • 作者简介:周鸣飞, 男, 25岁, 博士研究生.
  • 基金资助:

    国家自然科学基金

UV Pulsed Laser Photolysis of Matrix Isolated Mn2(CO)10 at Low Temperature

ZHOU Ming-Fei, WANG Wu-Min, YU Min, ZHENG Qi-Ke   

  1. Laser Chemistry Labortory, Fudan University, Shanghai, 200433
  • Received:1993-01-09 Revised:1993-03-20 Online:1993-11-24 Published:1993-11-24

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摘要： 采用280nm和355nm的脉冲激光作光解光源,由FTIR进行初级产物探测,研究了Mn2(CO)10在低温基体隔离条件下的光解反应.结果表明,在Ar基体中,Mn2(CO)10经280nm激光光解的初级产物主要是Mn2(CO)9;而在Xe基体中还观察到了Mn(CO)5的生成;与280nm激光相比,采用355nm激光光解Mn2(CO)10,Mn2(CO)9的产率较低.

关键词: 低温基体隔离, Mn2(CO)10, 激光光解

Abstract: The photolysis of Mn2(CO)10 isolated in Ar and Xe matrices at 10 Khas been studied with 280 nm and 355 nm UVpulsed laser and Fourier-transformed infrared spectroscopy.The changes in the IRspectra of the Mn2(CO)10 after photolysis and its dependence on the matrices, irradiation time, laser wavelength and the concentration COdoped in the matrix have been examined.The experimental results show that in solid argon matrix the primary product of the dissociation of Mn2(CO)10 is Mn2(CO)9, and in solid xenon matrix, Mn(CO)5 is also observed.The dissociation yield in the xenon matrix is higher than that in argon matrix.Due to the matrix cage effect, the photofragments can recombine, the yield of Mn2(CO)9 is related to the COconcentration in matrix, whereas that of Mn(CO)5 is independent on COconcentration.Based on the COdependence of the absorption intensities of the IRband of the reaction products, the conclusion that in xenon matrix the absorption at 2056.3, 2030.9, 1998.8, 1974.5 and 1764.1 cm-1 are the vibrational bands of Mn2(CO)9 and 1991.9 cm-1 is that of Mn(CO)5 has been reached.The 280 nm pulsed laser is more effective on photolyzing Mn2(CO)10 and generating Mn2(CO)9 than 335nm pulsed alser.

Key words: Matrix isolation at low temperature, Mn2(CO)10, Laser photolysis

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