2001 Fiscal Year Final Research Report Summary
Spectroscopy and Dynamics of Reactive Cluster Studied by Two-Color Laser Vibrational Spectrosopy and Quantum Chemical Calculation
| Project/Area Number |
11304043
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Physical chemistry
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| Research Institution | Okazaki National Research Institutes Institute for Molecular Science |
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Principal Investigator |
FUJII Masaaki Okazaki National Research Institutes Institute for Professor, 分子科学研究所, 教授 (60181319)
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| Co-Investigator(Kenkyū-buntansha) |
SAKAI Makoto Okazaki National Research Institutes Institute for Research Associate, 分子科学研究所, 助手 (60298172)
HASHIMOTO Kenro Okazaki National Research Institutes Institute for Professor, 大学院・理学研究科, 助教授 (40202254)
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| Project Period (FY) |
1999 – 2001
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| Keywords | Cluster / Infrared Spectrum / Solvation / Multiphoton Ionization / IR Dip Spectroscopy / Proton Transfer / Phenol / Naphthol |
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| Research Abstract |
Reflectron mass-spectrometer with reactive cluster source was designed and built succes sfully. Originally developed IR-UV multi-resonance spectroscopies were combined with this cluster source, and vibrational spectra of reactive clusters have been measured not only in the ground- state but also in the excited electronic states. The most clear example is the study on photochemistry in phenol-ammonia clusters. The vibrational transitions of the photochemical reaction products in phenol-(NH_3)_3 have been measured by UV-IR-UV three-color dip spectroscopy. Two sharp bands at -3200 cm^-1 and a broad band in the region 2700-31 00 cm^-1 are observed. The spectrum is clearly different from that of the cluster in S_(1) and also largely different from the IR spectrum of NH_4+(NH_3)_2. This suggests that hydrogen transfer occurs in electronically excited phenol-(NH_3)_3. Evidence of hydrogen trans fer hasalso been found in phenol-(NH_3)_4 based on the mass spectrum and the IR dip spectrum of the cluster. In addition, IR spectra of solvated cluster of naphthol, carbazole, 7-azaindo!e and its dimer have been measured by IR-UV double resonance spectroscopies and their slruc lure have been determind^ based on the comparison to ab initio MO calculations. The re lation between the structure and photochemical properties have been discussed.
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