Development of multi-functional Spin System by Combination of Photochromic Spin Coupler

光致变色自旋耦合器组合多功能自旋系统的开发

• 批准号: 15087204
• 负责人: MATSUDA Kenji
• 金额: $ 18.43万
• 依托单位: Kyushu University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research on Priority Areas
• 财政年份: 2003
• 资助国家: 日本
• 起止时间: 2003 至 2006
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-15087204/
• 关键词: Photochromism; Exchange Interaction; Nitroxide Radical; Conductivity; Gold Nanop article; 分子エレクトロニクス; 自己組織化; 不斉情報; 分子磁性; 光スイッチング; 光スイッチ

Photoswitching of the intramolecular magnetic interaction was demonstrated using diarylethenes with 2,5-bis(arylethynyl)-4-methyl-3-thienyl side group. Two nitroxide radicals were placed at each end Of 2,5-bis(arylethynyl)-4-methyl-3-thienyl group. Three kinds of aryl groups, 2,5-thienylene, p-phenylene, and m-phenylene groups, were used in the arylethynyl moiety. The diarylethene photoswitching units have an extended π-conjugated chain on one side of the diarylethene. The photochromic reactivity was dependent on the arylethynyl group. Diarylethenes with m-phenylene group showed an efficient photochromic reactivity. Along with the photochromic reaction the diarylethenes showed photoswitching of ESR spectrum originating from the change in the magnetic interaction between two unpaired electrons. The open-ring isomer showed stronger exchange interaction than the photogenerated closed-ring isomer. The magnetic interaction between two radicals via the π-conjugated chain was altered by photocyclization due to the change of the hybrid orbital at the 2-position of the thiophene ring from sp2 to sp3.

用带有2，5-二(芳乙炔)-4-甲基-3-噻吩基侧基的二芳基乙烯证明了分子内磁性相互作用的光开关。在2，5-二(芳乙炔基)-4-甲基-3-噻吩基的两端各放置两个氮氧基。芳乙炔中含有3种芳基：2，5-亚硫基、对亚苯基和间亚苯基。二芳基乙烯光开关单元在二芳基乙烯的一侧具有延伸的π共轭链。光致变色反应活性依赖于芳乙炔基团。含间苯基的二芳基乙烯类化合物具有较好的光致变色反应活性。伴随着光致变色反应，二芳基乙烯的ESR谱发生了光开关，这是由于两个不成对的电子之间的磁相互作用发生了变化。开环异构体比光生闭环异构体表现出更强的交换作用。由于噻吩环2-位杂化轨道由sp2变为sp3，通过光环化改变了两个自由基间通过π共轭链的磁性相互作用。

项目成果

Photochromism of Diarylethenes on Gold and Silver Nanoparticles

金银纳米颗粒上二芳基乙烯的光致变色

• 发表时间: 2006
• 期刊: Bull. Chem. Soc. Jpn. 79(9)
• 作者: 田中 秀和;廣岡 誠之;柳澤 吉彦;川合 知二;H.Yamaguchi
• 通讯作者: H.Yamaguchi

Diarylethene as a Photoswitching Unit of Interaction"in"Functional Organic Materials : Syntheses, Strategies and Applications

二芳基乙烯作为功能有机材料中相互作用的光开关单元:合成、策略和应用

• 发表时间: 2007
• 作者: Y.Teki;H.Tamekuni;J.Takeuchi;Y.Miura;K.Matsuda
• 通讯作者: K.Matsuda

Full-Color Photochromism of Fused Dithienylethene Trimer

稠合二噻吩乙烯三聚体的全色光致变色

• 发表时间: 2005
• 期刊: J.Am.Chem.Soc. 127,(25)
• 作者: K.Matsuda;K.Higashiguchi
• 通讯作者: K.Higashiguchi

Photoswitching of conductance of diarylethene-Au nanoparticle network

• DOI: 10.1039/b617246f
• 发表时间: 2007-01-01
• 期刊: CHEMICAL COMMUNICATIONS
• 影响因子: 4.9
• 作者: Ikeda, Masumi;Tanifuji, Naoki;Matsuda, Kenji
• 通讯作者: Matsuda, Kenji

Excited-State Behavior of a Fluorescent and Photochromic Diarylethene on Silver Nanoparticles

• DOI: 10.1021/jp065856q
• 发表时间: 2007-02
• 期刊: Journal of Physical Chemistry C
• 影响因子: 3.7
• 作者: Hidehiro Yamaguchi;K. Matsuda;M. Irie