在超声分子束条件下Mn2(CO)10的多光子电离解离

近年来，人们对具有金属－金属键的Mn2（CO）10分子的光解离电离动力学的研究十分关注．这一方面是由于其独特的分子结构可以获得丰富的光化学及其化学性质方面的信息；另一方面从其结构和光活性之间的关系，有助于了解双核金属有机化合物在催化反应中所起的作用．Leutwyler和Even[1]曾在超声分子来条件下，用脉冲染料激光实现了Mn2（CO）10的多光子电离解离（MPID）过程，获得Mni＋（i＝1，2，3）金属碎片离子．Lichin等人[2]曾用511nm和483nm激光引起Mn2（CO）10的气相多光子解离和电离，测得产物中除了Mn＋，Mn2＋和MnCO＋离子…

Multiphoton Ionization and Dissociation of Mn_2(CO)_(10) in a Supersonic Molecular Beam

The multiphoton ionization and dissociation of Mn2(CO)10 in a supersonicmoleclar beam is investigated with a XeCl excimer laser (308nm) and a tunable dye laser(430 ~ 448nm). The main fragment ions detected by a time-of-fligh mass spectrometer include Mn , Mn(CO)x (x<5), Mn2(CO)y (y<9) and the parent molecular ionMn2(CO)10 . Additionally, metal cluster ions Mni (i=2,3,4) and metal carbonyl clusterions Mn3(CO)9,10 and Mn4(CO)10 are also detected. The Mn ion might be producedvia a sequential photodissociation to form Mn atorns first and followed by a nonresonantor resonant enhanced multiphoton ionization of Mn atoms. The mechanism of the laserinduced multiphoton ionization and dissociation is discussed.