Excited-State Electron Transfer in Size-Selected Moleclar Cluster

尺寸选择分子簇中的激发态电子转移

• 批准号: 05453018
• 负责人: ITOH Michiya
• 金额: $ 4.74万
• 依托单位: Kanazawa University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (B)
• 财政年份: 1988
• 资助国家: 日本
• 起止时间: 1988 至 1994
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-05453018/
• 关键词: Supersonic Jet; Hole Burning; Excited-State Interaction; Exciplex; Proton Transfer; Cluster

1)In supersonic free jet, molecules can be in cooled and isolated molecular condition, which can exhibit inherent characters of molecules different from those in solution. Some intramolecular hydrogen bonding systems show the excited state proton transfer (ESPT) in the singlet excited state of molecule. This projet presents nanosecond fluorescence studies of the intramoecular ESPT in 3-hydroxyflavone and related complounds and in their solvent clusters in supersonic expansion.2)Intramolecular exciplex formation in the jet-cooled bichromophoric electron donor-acceptor systems is distinguishable from the intermolecular exciplex in supersonic expansion. The present persistent hole burning depletion spectra have demonstrated that the multi-conformations are involved in these bichromophoric EDA systems as well as intermolecular vdW complex. The different ground-state conformations were observed to exhibit the different excess vibrational energy dependence of the exciplex formation.

1）在超声速自由射流中，分子处于冷却和孤立的分子状态，表现出不同于溶液中分子的固有特性。一些分子内氢键系统在分子的单重激发态上表现出激发态质子转移（ESPT）。本文研究了3-羟基黄酮及其相关配合物和它们的溶剂团簇在超声膨胀下的分子内ESPT的纳秒荧光。2）在喷射冷却的双色电子给体-受体体系中，分子内激基复合物的形成与超声膨胀下的分子间激基复合物是不同的。目前的持续烧孔耗尽光谱表明，在这些双色EDA系统以及分子间的VDW复合物涉及的多构象。不同的基态构象，观察到表现出不同的过量振动能量的激基复合物形成的依赖性。

项目成果

Ryozo Takasu, Yoshihisa Fujiwara, and Michiya Itoh: "No excited state proton transfer takes place in jet-cooled methanol clusters of 3-hydroxyflavone" Chem.Phys.Lett.217. 478-480 (1993)

Ryozo Takasu、Yoshihisa Fujiwara 和 Michiya Itoh：“喷射冷却的 3-羟基黄酮甲醇簇中不发生激发态质子转移”Chem.Phys.Lett.217。

Michiya Itoh: "Fluorescence of the excited-state proton transfer in substituted 3-hydroxychromones in supersonic jet." Pure,& Appli Chem.65. 1629-1634 (1993)

Michiya Itoh：“超音速喷射中取代的 3-羟基色酮中激发态质子转移的荧光。”

M.Itoh et al.: "Intramolecular exciplex formation in jet-cooled bichromophric chain molecules;Torsional conformations and excess energy..." J.Am.Chem.Soc. 115. 4799-4807 (1993)

M.Itoh 等人：“喷射冷却双色链分子中的分子内激基复合物形成；扭转构象和过剩能量……”J.Am.Chem.Soc。

N.Kizu,M.Itoh: "Intramolecular exciplex formation in jet-cooled bichromophoric chain molecules;Torsional conformations・・・・" J.Am.Chem.Soc.115. 4799-4807 (1993)

N.Kizu、M.Itoh：“喷射冷却双发色链分子中的分子内激基复合物形成；扭转构象……”J.Am.Chem.Soc.115 4799-4807 (1993)。

R.Takasu,Y.Fujiwara,M.Itoh: "No excited stateproton transfer in jet-cooled methanol clusters of 3-hydroxyflavone" Chem.Phys.Letters. 217. 76-480 (1993)

R.Takasu、Y.Fujiwara、M.Itoh：“3-羟基黄酮的喷射冷却甲醇簇中没有激发态质子转移”Chem.Phys.Letters。