Photo-excited carrier dynamics in super-molecular complex with molecular recognition function

具有分子识别功能的超分子复合物中的光激发载流子动力学

• 批准号: 23654106
• 负责人: EMA Kazuhiro
• 金额: $ 2.25万
• 依托单位: Sophia University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Challenging Exploratory Research
• 财政年份: 2011
• 资助国家: 日本
• 起止时间: 2011 至 2012
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-23654106/
• 关键词: 光物性; 超分子; 光誘起電子移動; 糖認識; シクロデキストリン; 蛍光プローブ; ナノ光物性

An inclusion complex consisting of a boronic acid fluorophore (C1-APB) and b-cyclodextrin (b-CyD) acts as a supramolecular sugar sensor whose response mechanism is based on photoinduced electron transfer (PET) from the excited pyrene to the boronic acid. We have investigated the PET process in the C1-APB/CyD complexes by using time-resolved photoluminescence (TRPL) measurements at room temperature, and have succeeded in estimating of the electron-transfer time to be about 1 ns. We have also studied the effects of CyDs on the PET process by comparing two kinds of CyDs (a-CyD, b-CyD) under different water-dimethyisulfoxide (DMSO) concentration conditions, and have found that the CyDs interacting with the boronic acid moiety completely inhibits PET quenching and increases monomer fluorescence intensity.

由硼酸荧光团（C1-APB）和b-环糊精（b-CyD）组成的包合物作为超分子糖传感器，其响应机制是基于从激发的芘到硼酸的光诱导电子转移（PET）。我们在室温下使用时间分辨光致发光（TRPL）测量方法研究了C1-APB/CyD配合物中的PET过程，并成功地估计了电子转移时间约为1ns。我们还通过比较不同水-二甲基亚砜（DMSO）浓度条件下的两种CyDs (a-CyD, b-CyD)，研究了CyDs对PET过程的影响，发现与硼酸段相互作用的CyDs完全抑制PET猝灭，提高单体荧光强度。

项目成果

Influence of the image charge effect on excitonic energy structure in organic-inorganic multiple quantum well crystals

• DOI: 10.1103/physrevb.87.125421
• 发表时间: 2013-03
• 期刊: Physical Review B
• 影响因子: 3.7
• 作者: H. Takagi;H. Kunugita;K. Ema

無機有機複合型物質(C6H5-C2H4NH3)2PbBr4と(C4H9NH3)2PbBr4における鏡像電荷効果の比較

无机有机复合材料(C6H5-C2H4NH3)2PbBr4和(C4H9NH3)2PbBr4镜像电荷效应比较

• 发表时间: 2011
• 作者: 逢坂良樹;余越伸彦;中谷正俊;石原一;高木英嗣
• 通讯作者: 高木英嗣

Effects of Cyclodextrins on Intramoleculer Photoinduced Electron Transfer in a Boronic Acid Fluorophore

环糊精对硼酸荧光团分子内光致电子转移的影响

• 发表时间: 2014
• 期刊: Analytical Science
• 作者: Hiroya KANO;Daichi TANOUE;Hiroaki SHIMAOKA;Kohei KATANO;Takeshi HASHIMOTO;Hideyuki KUNUGITA;Shinkoh NANBU;Takashi HAYASHITA;and Kazuhiro EMA
• 通讯作者: and Kazuhiro EMA

Mechanism of fluorescence intensity change in saccharide recognition by boronic acid fluorophore/cyclodextrin complexes in water

水中硼酸荧光团/环糊精复合物识别糖类时荧光强度变化的机制

• 发表时间: 2013
• 作者: H. Kanou;K. Katano;H. Kunugita;S. Nanbu;T. Hayashita;and K. Ema
• 通讯作者: and K. Ema

Influence of image charge effect on exciton fine structure in an organic-inorganic quantum well material

镜像电荷效应对有机-无机量子阱材料中激子精细结构的影响

• 发表时间: 2012
• 作者: 逢坂良樹;余越伸彦;中谷正俊;石原一;H. Takagi
• 通讯作者: H. Takagi