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Nakazato S, Arai T. Photoisomerization and Single Bond Rotation in trans-1,2-Di(2-naphthyl)ethene-Cored Dendrimers. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2014. [DOI: 10.1246/bcsj.20140143] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Satoshi Nakazato
- Graduate School of Pure and Applied Sciences, University of Tsukuba
| | - Tatsuo Arai
- Graduate School of Pure and Applied Sciences, University of Tsukuba
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Kataoka K, Arai T. Photochemical Characteristics of Amphiphilic Stilbene Dendrimers Induced by Aggregate Formation at Very Low Concentration. CHEM LETT 2013. [DOI: 10.1246/cl.130098] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Kayoko Kataoka
- Graduate School of Pure and Applied Sciences, University of Tsukuba
| | - Tatsuo Arai
- Graduate School of Pure and Applied Sciences, University of Tsukuba
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Suzuki M, Momotake A, Kanna Y, Nishimura Y, Hirota K, Morihashi K, Arai T. Photochemistry of arylacetylenyl-substituted stilbenes. J Photochem Photobiol A Chem 2013. [DOI: 10.1016/j.jphotochem.2012.11.019] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Takizawa T, Arai T. Control of Photoisomerization in Water-soluble Stilbene Dendrimers by Conformation of Dendrons: How Water-soluble Dendrimer Molecules Are Dissolved in Water. CHEM LETT 2012. [DOI: 10.1246/cl.2012.415] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Tsutomu Takizawa
- Graduate School of Pure and Applied Sciences, University of Tsukuba
| | - Tatsuo Arai
- Graduate School of Pure and Applied Sciences, University of Tsukuba
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Nakazato S, Takizawa T, Arai T. Photoisomerization and energy transfer in naphthalene-terminated stilbene dendrimers. Photochem Photobiol Sci 2012; 11:885-8. [DOI: 10.1039/c2pp05328d] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Takizawa T, Arai T. Remote Controlled Intramolecular Exciplex Formation and Enhanced Photoisomerization in Stilbene-cored Poly(benzyl ether) Dendrimers with Alkoxycarbonyl Surface Functional Groups. CHEM LETT 2011. [DOI: 10.1246/cl.2011.1124] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Mitsuno C, Momotake A, Shinohara Y, Takahashi K, Nagahata R, Nishimura Y, Arai T. Stilbene-cored poly(glutamate) dendrimers. Tetrahedron Lett 2009. [DOI: 10.1016/j.tetlet.2009.10.004] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Yoshimura N, Momotake A, Shinohara Y, Takahashi K, Nagahata R, Nishimura Y, Arai T. Synthesis and Photochemical Characteristics of Amphiphilic Enediyne Dendrimers. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2009. [DOI: 10.1246/bcsj.82.723] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Kato K, Momotake A, Shinohara Y, Sato T, Takahashi K, Nagahata R, Nishimura Y, Arai T. Photochemical Properties of 3,3′-Disubstituted Stilbene Dendrimers. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2009. [DOI: 10.1246/bcsj.82.603] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Akatsuka R, Shinohara Y, Sato T, Nishimura Y, Arai T. Fluorescence Characteristics of Naphthalene Dendrimers at Low Concentration in Aqueous Solution. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2009. [DOI: 10.1246/bcsj.82.242] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Okamoto T, Momotake A, Shinohara Y, Nagahata R, Arai T. Isomer Specific Solvent Effect on Photoisomerization of Photoresponsive Polyphenylene Dendrimers with a Stilbene Core. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2007. [DOI: 10.1246/bcsj.80.2226] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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12
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Schulz A, Meier H. Poly(propylene imine) dendrimers functionalized with stilbene or 1,4-distyrylbenzene chromophores. Tetrahedron 2007. [DOI: 10.1016/j.tet.2007.08.064] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Yoshimura N, Momotake A, Shinohara Y, Nishimura Y, Arai T. Synthesis and Photoisomerization of Enediyne-Type Dendrimers with Benzyl Ether Dendrons. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2007. [DOI: 10.1246/bcsj.80.1995] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Miura Y, Momotake A, Shinohara Y, Wahadoszamen M, Nishimura Y, Arai T. The first observation of the effect of dendritic structure to produce the triplet excited state of the core stilbene by dendron excitation. Tetrahedron Lett 2007. [DOI: 10.1016/j.tetlet.2006.11.109] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Hayakawa J, Ikegami M, Mizutani T, Wahadoszamen M, Momotake A, Nishimura Y, Arai T. Solvent Effect on the Photochemical Properties of Symmetrically Substituted trans-3,3‘,5,5‘-Tetramethoxystilbene. J Phys Chem A 2006; 110:12566-71. [PMID: 17107105 DOI: 10.1021/jp065075p] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Photochemical properties of trans-3,3',5,5'-tetramethoxystilbene (TMST) have been studied in various polar solvents. The Stokes shift of trans-TMST was found to be increased with increasing solvent polarity. The fluorescence lifetime of trans-TMST experienced a large solvent effect changing from 2.3 ns in cyclohexane to 16.6 ns in acetonitrile. These results indicate that the excited singlet state of trans-TMST has a charge-transfer (CT) character. On the basis of the obtained results, the interior polar environment of a water-soluble TMST dendrimer is discussed.
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Affiliation(s)
- Junpei Hayakawa
- Graduate School of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8571, Japan
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Senda N, Momotake A, Nishimura Y, Arai T. Synthesis and Photochemical Properties of a New Water-Soluble Coumarin, Designed as a Chromophore for Highly Water-Soluble and Photolabile Protecting Group. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2006. [DOI: 10.1246/bcsj.79.1753] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Ohshima A, Momotake A, Nagahata R, Arai T. Enhancement of the Large Stokes-Shifted Fluorescence Emission from the 2-(2‘-Hydroxyphenyl)benzoxazole Core in a Dendrimer. J Phys Chem A 2005; 109:9731-6. [PMID: 16833286 DOI: 10.1021/jp053702p] [Citation(s) in RCA: 55] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The photochemical properties of a series of newly synthesized dendrimers, 4-6, having a 2-(2'-hydroxyphenyl)benzoxazole (HBO) core, were studied in benzene. The fluorescence quantum yields (Phi(f)) were determined to be 0.022, 0.030, and 0.038 for 4, 5, and 6, respectively, increasing in higher generation dendrimers. With transient absorption spectroscopy, the quantum yields of the isomerization from the (E)-keto form ((1)K(E)*) to the (Z)-keto form ((1)K(Z)) (Phi(E)(-->)(Z)) and those of intersystem crossing (Phi(isc)) can be estimated. Whereas Phi(E)(-->)(Z) values decreased in higher generation dendrimers, Phi(isc) values were almost the same among 4-6. The quantum yields of nonradiative decay (Phi(nr)) increased in higher generation dendrimers. The dendrimer structure also affected the reverse tautomerization process.
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Affiliation(s)
- Asuka Ohshima
- Graduate School of Pure and Applied Sciences, University of Tsukuba, Tsukuba-city, Ibaraki 305-8571, Japan
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Soomro SA, Benmouna R, Berger R, Meier H. Preparation and Photochemistry of Dendrimers with Isolated Stilbene Chromophores. European J Org Chem 2005. [DOI: 10.1002/ejoc.200500185] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Momotake A, Horiuchi H, Hayakawa J, Mizutani T, Nishimura Y, Hiratsuka H, Arai T. Study on Oxygen Quenching Processes of the Excited State Dendrimer Molecules. CHEM LETT 2005. [DOI: 10.1246/cl.2005.684] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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21
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The photochemical isomerization of cross-linked 1,3,5-tristyrylbenzene dendrimer with hula-twist mechanism. Tetrahedron Lett 2005. [DOI: 10.1016/j.tetlet.2005.03.015] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Water-soluble poly(aryl ether) dendrimers as a potential fluorescent detergent to form micelles at very low CMC. Tetrahedron Lett 2004. [DOI: 10.1016/j.tetlet.2004.09.087] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Tatewaki H, Baden N, Momotake A, Arai T, Terazima M. Dynamics of Water-Soluble Stilbene Dendrimers upon Photoisomerization. J Phys Chem B 2004. [DOI: 10.1021/jp048474y] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Hiroshi Tatewaki
- Department of Chemistry, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan, and Department of Chemistry, University of Tsukuba, Tsukuba, Ibaraki 305-8571, Japan
| | - Naoki Baden
- Department of Chemistry, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan, and Department of Chemistry, University of Tsukuba, Tsukuba, Ibaraki 305-8571, Japan
| | - Atsuya Momotake
- Department of Chemistry, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan, and Department of Chemistry, University of Tsukuba, Tsukuba, Ibaraki 305-8571, Japan
| | - Tatsuo Arai
- Department of Chemistry, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan, and Department of Chemistry, University of Tsukuba, Tsukuba, Ibaraki 305-8571, Japan
| | - Masahide Terazima
- Department of Chemistry, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan, and Department of Chemistry, University of Tsukuba, Tsukuba, Ibaraki 305-8571, Japan
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