Structural Studies of Novel Metal Complexes Produced by Laser Ablation of Metals

1. 我们开发的“激光烧蚀-分子束（LAMB）”方法可以制备多种新型有机金属化合物和无机金属配合物。它们的分子结构非常有趣。本研究的主要目的是研究它们的分子结构。研究了M^+=Mg^+、Al^+、Mn^+与氨/水二元团簇（NH3）p(H2O)a反应形成产物络合物离子M^+(NH_3) M (H_2O)n的分布。络合离子的结构可以从它们的分布模式推断：选择性、非选择性和幻数样。基于Kiots蒸发系综模型的动力学模拟再现了该分布的基本特征。对M^+与Cr(CO)_6.4反应得到的混合金属双核羰基离子[MCr(CO)_n]^+， n 4-6的优化结构和能量学进行了密度泛函计算。用傅里叶变换红外光谱仪研究了M^++Cr(CO)_6和M^+^+苯在10-15 K下在Ar基体中的反应产物。利用染料激光与Nd: YAG激光的二次谐波的差频产生，获得了可调谐的ns红外激光。用它得到了氨簇离子和甲醇簇离子的光谱。采用双环形染料/钛蓝宝石激光器与AgGaS_2晶体进行差频产生，在中红外（7-10mum）区域获得了可调谐的连续波红外激光器。设计并制作了一台配有离子阱的三重四极质谱计。测定了苯二聚体离子（C_6H_6）_2^+及其衍生物（C6ll5X） _2^+的预解作用谱，并讨论了它们的分子结构。构建了基于Nd: YAG激光泵浦染料激光器和基于连续波环形染料激光器的可见腔环衰光谱仪，并使用J2对其性能进行了测试。

1. A variety of novel organometallic compounds and inorganic metal complexes can be prepared by the "laser ablation-molecular beam (LAMB)" method developed by us. Their molecular structures are very interesting. The main goal of the present research is to study their molecular structures.2. Reactions of M^+=Mg^+, Al^+, Mn^+ and with ammonia/water binary clusters (NH3)p(H2O)a to form adistribution of product complex ions M^+(NH_3)m(H_2O)n were studied. Structures of the complex ions can be inferred from the pattern of their distribution : selective, mon-selective and magic number-like. Kinetic simulation based on the Kiots' evaporative ensemble model reproduced the essential feature of the distribution.3. Density functional calculations were made on the optimized structures and energetics of mixed-metal binuclearcarbonyl ions [MCr(CO)_n]^+, n 4-6, obtained experimentally by the reaction of M^+ with Cr(CO)_6.4. The products of M^++Cr(CO)_6, and M^+^+benzene reactions were studied in Ar matrix at 10-15 K using a Fourier-transform infrared spectrometer.5. A tunable ns infrared laser light was obtained by difference frequency generation of dye laser light and the 2nd harmonic of a Nd : YAG laser. It was used to obtain spectra of ammonia and methanol cluster ions.6. A tunable CW infrared laser light in the mid-IR (7-10mum) region was obtained by difference frequency generation with a AgGaS_2 crystal using two ring dye/titanium sapphire lasers.7. A triple quadrupole mass spectrometer equipped with an ion trap was designed and constructed. Predissociation action spectra of benzene dimer ion (C_6H_6)_2^+ and its derivatives (C6ll5X)2^+ were measured, and their molecular structures were discussed.8. A cavity ring down spectrometer in the visible region (Nd : YAG laser pumped dye laser-based and CW ring dye laser-based) was constructed, and its performance was tested using J2.