Study of Role of Large-Amplitute Vibrations in Dynamics of Molcular Complexes

大振幅振动在分子配合物动力学中的作用研究

基本信息

批准号：
10440168
负责人：
TAKAYANAGI Masao
金额：
$ 7.74万
依托单位：
Tokyo University of Agriculture and Technology
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B).
财政年份：
1998
资助国家：
日本
起止时间：
1998 至 2000
项目状态：
已结题

项目摘要

Vacuum chamber for molecular beam experiment equipped with a linear time-of-flight mass spectrometer was constructed to measure mass-selected resonance multi-photon ionization spectra. With the equipment and another vacuum chamber for laser-induce fluorescence (LIF) purpose, following researches have been performed.1. LIF-excitation spectra of methyl-substituted nitrogen-containing aromatic molecules such as picolines, methylpyrazine and methylquinoline in supersonic jets were measured. Relation between quantum yields of fluorescence and methyl torsional motion was studied.2. LIF-excitation and dispersed fluorescence spectra of 4-dimethylaminopyridine and its 3-methyl and 3, 5-dimethyl derivatives in supersonic jets were measured. These molecules are known to have CT emission in polar solvents. Effects of methyl substitution at pyridine ring and of complex formation with some solvent molecules on CT-state formation were discussed.3. LIF-excitation and hole-burning spectra of 5-methylin … More dole monomer and its complexes with H_2O, N_2O, methanol and benzene in supersonic jets were measured. Change of the torsional potential of methyl group of 5-methylindole upon complex formation was investigated.4. LIF-excitation and hole-burning spectra of m-tolunitrile-N_2O and m-tolunitrile-H_2O complexes in supersonic jets were measured. For each complex, two isomers were found. Torsional potentials of methyl groups of m-tolunitrile-N_2O and m-tolunitrile-H_2O in one isomer were found to be almost similar with that in monomer. Out the other hand, torsional potentials in the other isomer are different appreciably from that in monomer. Torsional potentials in these complexes were compared with those in m-tolunitrile-rare gas complexes which had been determined previously.5. LIF-excitation and hole-burning spectra of a merocyanine dye, NK1247, were measured. Origin of observed low-frequency bands were investigated. Low quantum yield of fluorescence for the dye molecule was discussed in terms of high efficiency photoisomerization of the molecule. Less

构建了配备有线性飞行时间质谱仪的分子束实验的真空室，以测量质量选择的共振多光子电离光谱。在研究后进行了研究，设备和另一个用于激光引起的荧光（LIF）目的的真空室进行了研究。1。测量了超音速射流中甲基取代氮的含氮芳香族分子的LIF激发光谱，例如Picolines，甲基吡嗪和甲基喹啉。荧光和甲基扭转运动的量子产量之间的关系进行了研究。2。测量了4-二甲基胺及其3-甲基和3-甲基的3-二甲基衍生物的LIF兴奋和分散的荧光光谱，并测量了超音速喷射中的3-二甲基衍生物。这些分子已知在极性求解器中具有CT发射。讨论了甲基取代在吡啶环和某些溶液分子对CT状态形成的复合形成的影响。3。测量了5-甲基蛋白的LIF兴奋和燃烧光谱……在超音速喷气机中使用H_2O，N_2O，N_2O，甲基和苯与H_2O，N_2O，甲基和苯的复合物。研究复合形成后5-甲基吲哚的甲基甲基的扭转潜力的变化。4。测量了超音速射流的M-Toluunitrile-N_2O和M-Toluunitrile-H_2O复合物的LIF激发和燃孔光谱。对于每个复合物，发现两个异构体。发现一种异构体中M-二硝基-N_2O和M-Toluunitrile-H_2O的甲基的扭转电位与单体中的扭转电位几乎相似。另一方面，另一个异构体中的扭转电位与单体中的扭转电位不同。将这些络合物中的扭转电势与以前确定的M-二氟 - 稀有气体复合物中的扭转电势进行了比较。5。测量了蛋白苷染料NK1247的LIF兴奋和燃烧光谱。研究了观察到的低频带的起源。根据分子的高效率光异构化讨论了染料分子的荧光量低量子。较少的