Nonadiabatic transition in photochemical reactions studied by time-resolved spectroscopy of molecular orbitals

2017 Fiscal Year Final Research Report

• Project/Area Number: 15H03702
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Atomic/Molecular/Quantum electronics
• Research Institution: Hokkaido University
• Principal Investigator: sekikawa taro 北海道大学, 工学研究院, 准教授 (90282607)
• Co-Investigator(Renkei-kenkyūsha): TAKETSUGU Tetsuya 北海道大学, 大学院理学研究院, 教授 (90280932)
• Research Collaborator: IIKUBO Ryo ; TENTAKU Tateharu ; ARAKI Kotaro ; ATOBE Ryunosuke
• Project Period (FY): 2015-04-01 – 2018-03-31
• Keywords: 高次高調波 / 時間分解光電子分光 / 光化学反応 / 非断熱遷移 / 分子軌道

Outline of Final Research Achievements

Relaxation dynamics of 1,3-pentadiene(PD) and 2,5-dimethyl-2,4-hexadiene(DH) were investigated by time-resolved photoelectron spectroscopy to elucidate the effects of the steric hinderence or the mass by the methyl groups on the relaxation dynamics of the conjugated dienes.
Our theoretical calculation reveals that the molecular structure of DH at a conical intersection is totally different from those of BD and PD, which might be attributable to the steric hinderence. Upon returning to the ground state, the stimulated vibrational modes in DH and PD are different because of the different structure at the conical intersections. This difference appears in the photoelectron specra.

Free Research Field

量子エレクトロニクス