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

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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.