Structure,electronic structure and reactivity of metal clusters.

团簇是原子或分子的聚集体，由于团簇作为自由原子或分子与液体或晶体之间的中间相而受到广泛研究。在本研究项目中，(1)建立了激光蒸发技术形成金属团簇的方法。(2)在铝团簇&lt；Al_n&gt；与氧的反应中，发现生成&lt；Al_(12)&gt；&lt；O_2&gt；的特定反应路径优先发生。(3)利用新研制的脉冲喷嘴，用激光双谐振法探测到了非常不稳定的亚稳化合物&lt；H_g&gt；(&lt；^3P_0&gt；)-Rg(Rg=Ar或Kr)，并精确地测定了亚稳电势曲线。(4)研究了Hg-M(M=&lt；CH_4&gt；，&lt；C_2&gt；&lt；H_6&gt；，&lt；N_2&gt；和CO)的电子光谱和多重态驰豫过程。分子间的弯曲振动和旋转运动是汞(&lt；^3P_1&gt；)-M络合物物理猝灭的促进运动。(5)研究了1-氮杂卡巴唑和7-氮杂环己烷氢键二聚体在超音速射流中激发态的双质子转移反应。氢键伸缩振动是反应的关键振动。(6)用喷射光谱研究了&lt；A^2&gt；&lt；A^2&gt；&lt；用激光荧光法测定了这些自由基的预解离通道。

The clusters which are the aggregate of atoms or molecules have been studied extensively because of the important nature of the clusters as an intermediate phase between free atoms or molecules and liquid or sold (crystal).In the present research project, (1) the methodology of laser vaporization technique for the formation of metal clusters was established. (2) In the reaction of aluminum clusters <Al_n> with oxygen, it was found that the specific reaction path to form <Al_(12)> <O_2> occurs preferentially. (3) By the use of newly developed pulsed nozzle, very unstable metastable complex <H_g> ( <^3P_0> )-RG(RG=Ar or Kr) was detected by the laser double resonance method and potential curve of the metastable state was determined precisely.(4) Electronic spectra and intramultiplet relaxation processes of Hg-M(M= <CH_4> , <C_2> <H_6> , <N_2> and CO) were studied. Intermolecular bending vibration as well as the rotational motion which are missing ones in Hg-RG system were found to be the promoting motions of the physical quenching of the Hg( <^3P_1> )-M complexes.(5) Double proton transfer reaction in the excited state of H-bonded dimers of 1-azacarbazole and 7-azaindole has been studied in a supersonic jet. The H-bond stretching vibration was found to be the key vibration of the reaction.(6) <CH_3> O and <CH_3> O-Ar rdicals in their <A^2> <A_1> state were studied by jet-spectroscopy. predissociation channel of these radicals were determined by the LIF method.