Design and Photo-functions of Self-assembled Nanolaminate Films

自组装纳米层压薄膜的设计和光功能

• 批准号: 14050050
• 负责人: TAKAGI Katsuhiko
• 金额: $ 54.02万
• 依托单位: Tokyo Metropolitan University (2006)Nagoya University (2002-2005)
• 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: 2001
• 资助国家: 日本
• 起止时间: 2001 至 2006
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-14050050/
• 关键词: Mesoporous silica(MPS); Titania nanosheets(TNS); (MPS; TNS)hybrid film on FTO electrode; Photocurrent; Photo induced charge separation; Dve-sensitized CT systems; 色素増感電荷分離膜系; メソポーラスシリカ; チタニアナノシート; 無機・無機異種界面; 紫外光電子移動; 長寿命電荷分離状態; ビオロゲン; テトラメチル

In the present project a stacking hybrid film of mesoporous silica (MPS) and titania nanosheets (TNS) has been investigated, each of which include separately porphyrin dye (TMPyP) and methyl viologen (MV^<2+>), respectively. Under UV light irradiation, thus obtained hybrid film exhibits one electron oxidation of TMPyP accompanied by the simultaneous generation of one electron reduced MV^<2+>. That is, the result suggests an electron transfer through the interface of these inorganic thin films. In this year, the MPS/TNS hybrid film deposited on a FTO electrode was studied from the point of the generation of electric current through the inorganic interface.(MPS-TMPyP)/(TNS-MV^<2+>) hybrid film on the FTO electrode was immersed in CH_3CN together with Pt working and Ag/AgCl reference electrodes, and analyzed by measuring the photocurrent under UV light. On applying a negative vias voltage, -0.4V, a cathodic current, though weak, has been observed from the FTO electrode to MPS-TMPyP throug … More h TNS conduction band. For the observation of definite electric currents, an inversely stacked (TNS)/(MPS-TMPyP) hybrid film was attempted, where an electron acceptor, MV^<2+>, was removed from TNS interlayers by applying a positive vies voltage. By irradiation of the inversely stacked film by UV light, a strong anodic photocurrent flows through the inorganic interface into the FTO electrode. On the basis of spectroscopic observation, ca. 60% of the photocurrents induced the one-electron oxidation of TMPyP into the corresponding one-electron oxidized species.The resulting charge separation has been found to be quite stable and survived for a long period in this system. For instance, the formed one-electron oxidized TMPyP and the one-electron reduced MV^<2+> remain for several hours under the aerated conditions and ambient temperature. Especially under deaerated conditions the charge separation has a period of half decay of>several days. Now the present system is under the study for extending to a visible light sensitized charge-separation by visible light excitation of an appropriate organic dye with exothermic electron transfer to the conduction band of TNS semiconductor. Less

在本项目中，研究了介孔二氧化硅(MPS)和二氧化钛纳米片(TNS)的堆叠杂化膜，其中各自分别包含卟啉染料(TMPyP)和甲基紫精(MV 2+ )。在UV光照射下，如此获得的杂化膜表现出TMPyP的一个电子氧化，同时产生一个电子还原的MV 2+ 。即，结果表明电子通过这些无机薄膜的界面转移。今年，从通过无机界面产生电流的角度研究了在FTO电极上沉积的MPS/TNS杂化薄膜。将FTO电极上的(MPS-TMPyP)/(TNS-MV^<2+>)杂化薄膜与Pt工作电极和Ag/AgCl参比电极一起浸入CH_3CN中，通过测量紫外光下的光电流进行分析。在施加负通孔电压 -0.4V 时，虽然很弱，但通过 TNS 导带从 FTO 电极到 MPS-TMPyP 观察到了阴极电流。为了观察确定的电流，尝试了反向堆叠的(TNS)/(MPS-TMPyP)混合膜，其中通过施加正Vies电压从TNS夹层去除电子受体MV 2+ 。通过紫外光照射反向堆叠薄膜，强阳极光电流通过无机界面流入FTO电极。根据光谱观察，约。 60% 的光电流诱导 TMPyP 的单电子氧化成相应的单电子氧化物质。已发现由此产生的电荷分离非常稳定，并在该系统中长期存在。例如，形成的一电子氧化的TMPyP和一电子还原的MV 2+ 在通气条件和环境温度下保留数小时。特别是在脱气条件下，电荷分离具有>几天的半衰减期。现在，本系统正在研究通过适当的有机染料的可见光激发以及放热电子转移到TNS半导体的导带来扩展到可见光敏化电荷分离。较少的

项目成果

The Design of Photofunctional Laminated Organized Thin Films : The Photochromism of Ammoniumazobenzene Arenecarboxylates Cast Silica Glass

光功能层压有序薄膜的设计: 偶氮苯芳烃羧酸铵浇铸石英玻璃的光致变色

• 期刊: Bull.Chem.Soc.Jpn. (In press)
• 作者: Ohtani;O.;Itoh;T.;Monna;Y.;Sasai R.;Shichi;T.;Yui;T.;Takagi;K.
• 通讯作者: K.

Photo-catalytic Electron Transport Through TNS-MPS Hybrid Interface

通过 TNS-MPS 混合接口进行光催化电子传输

• 发表时间: 2007
• 作者: T. Hirani;K. Takagi;H. Inoue;T. Yui;K. Okazaki;T. Torimoto
• 通讯作者: T. Torimoto

Chelation of spironaphthoxazine with zinc ions during the sol-gel-xerogel transitions in silicon alkoxide systems

硅醇盐体系中溶胶-凝胶-干凝胶转变过程中螺萘嗪与锌离子的螯合

• 发表时间: 2006
• 期刊: J.Photochem. ＆ Photobiol., A : Chemistr 183
• 作者: H.Nishikiori;R.Sasai;K.Takagi;T.Fujii
• 通讯作者: T.Fujii

Visible Light-Induced Electron Transfers in Titania Nanosheet and Mesoporous Silica Integrated Films

• DOI: 10.1246/bcsj.79.386
• 发表时间: 2006-03
• 期刊: Bulletin of the Chemical Society of Japan
• 影响因子: 4
• 作者: Tatsuto Yui;Takako Tsuchino;Kosho Akatsuka;A. Yamauchi;Yuka Kobayashi;T. Hattori;M. Haga;K. Takagi

Hybridization of layered niobates with cationic dyes

• DOI: 10.1163/156856706778400307
• 发表时间: 2006-08
• 期刊: Research on Chemical Intermediates
• 影响因子: 3.3
• 作者: T. Hattori;Zhiwei Tong;Yoshiyuki Kasuga;Y. Sugito;Tatsuto Yui;K. Takagi