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Linear, branched and network polysilanes with thienyl/furyl substituted sila-alkyl side chains and their applications for the synthesis of fluorescent silver nanoparticles/clusters. J CHEM SCI 2013. [DOI: 10.1007/s12039-012-0322-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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2
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Gumenyuk A, Ostapenko N, Ostapenko Y, Kerita O, Suto S. Unusual features of charge carrier traps energy spectra in silicon organic polymers revealed by advanced TSL. Chem Phys 2012. [DOI: 10.1016/j.chemphys.2011.12.009] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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3
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Shankar R, Sahoo U, Shahi V. Synthesis and Characterization of Fluorescent Polymer−Metal Nanocomposites Comprising Poly(silylene-co-silyne)s and Silver Nanoparticles. Macromolecules 2011. [DOI: 10.1021/ma200038x] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ravi Shankar
- Department of Chemistry, Indian Institute of Technology, Hauz Khas, New Delhi 110016, India
| | - Usharani Sahoo
- Department of Chemistry, Indian Institute of Technology, Hauz Khas, New Delhi 110016, India
| | - Vandana Shahi
- Department of Chemistry, Indian Institute of Technology, Hauz Khas, New Delhi 110016, India
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Seki S, Yoshida Y, Tagawa S, Asai K, Ishigure K, Furukawa K, Fujikiand M, Matsumoto N. Effects of structural defects on hole drift mobility in aryl-substituted polysilanes. ACTA ACUST UNITED AC 2009. [DOI: 10.1080/13642819908218327] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Shu Seki
- a Institute of Scientific and Industrial Research, Osaka University , 8-1 Mihogaoka, Ibaraki , Osaka , 567-0047 , Japan
| | - Yoichi Yoshida
- a Institute of Scientific and Industrial Research, Osaka University , 8-1 Mihogaoka, Ibaraki , Osaka , 567-0047 , Japan
| | - Seiichi Tagawa
- a Institute of Scientific and Industrial Research, Osaka University , 8-1 Mihogaoka, Ibaraki , Osaka , 567-0047 , Japan
| | - Keisuke Asai
- b Faculty of Engineering , University of Tokyo , 7-3-1 Hongo, Bunkyo-ku., Tokyo , 113-8654 , Japan
| | - Kenkichi Ishigure
- b Faculty of Engineering , University of Tokyo , 7-3-1 Hongo, Bunkyo-ku., Tokyo , 113-8654 , Japan
| | - Kazuaki Furukawa
- c NTT , Basic Research Laboratories , 3-1 Morinosato Wakamiya, Atsugi , Kanagawa , 243-0198 , Japan
| | - Michiya Fujikiand
- c NTT , Basic Research Laboratories , 3-1 Morinosato Wakamiya, Atsugi , Kanagawa , 243-0198 , Japan
| | - Nobuo Matsumoto
- c NTT , Basic Research Laboratories , 3-1 Morinosato Wakamiya, Atsugi , Kanagawa , 243-0198 , Japan
- d Shonan Institute of Technology , 1-1-25 Nishikaigan, Tsujidoh. Fujisawa , Kanagawa , 251-8510 , Japan
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5
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Seki S, Tagawa S. Optoelectronic Properties and Nanostructure Formation of σ-Conjugated Polymers. Polym J 2007. [DOI: 10.1295/polymj.pj2006222] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Acharya A, Seki S, Koizumi Y, Saeki A, Tagawa S. Photogeneration of Charge Carriers and Their Transport Properties in Poly[bis(p-n-butylphenyl)silane]. J Phys Chem B 2005; 109:20174-9. [PMID: 16853607 DOI: 10.1021/jp053300h] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The photocarrier generation mechanism and mobility in poly[bis(p-n-butylphenyl)silane] (PBPS) thin films doped with a variety of electron acceptors are studied by time-resolved microwave conductivity (TRMC) measurements. It was found that fullerene is a suitable electron acceptor for PBPS as it provides the highest product of photocarrier generation yield phi and mobility Sigmamu under excitation at 532 and 355 nm. The observed high phiSigmamu value of 4.5 x 10(-3) cm(2)/(V s) under excitation at 193 nm (6.39 eV) can be attributed to the direct ionization of PBPS molecules. The photoinduced electron transfer between C(60) and PBPS was investigated in a solution sample by laser flash photolysis under excitation at 532 nm. On the basis of the extinction coefficient of PBPS(*+), transient absorption of PBPS(*+) provides a maximum value of phi of 0.83% for the electron-transfer reaction from PBPS to (3)C(60). On the basis of this value of phi, the intrinsic intrachain mobility of holes on the PBPS backbone is estimated to be higher than 1.7 x 10(-2) cm(2)/(V s), suggesting the presence of a high conducting path along the Si backbone of PBPS.
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Affiliation(s)
- Anjali Acharya
- The Institute of Scientific and Industrial Research, Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka 567-0047, Japan
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Smith DA, Joray SJ, Bianconi PA. Synthetic Method Development and Molecular Weight Control for Homo- and Co-Polysilynes, Silicon-Based Network-Backbone Polymers. JOURNAL OF POLYMER RESEARCH 2005. [DOI: 10.1007/s10965-005-1765-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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9
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Kaats-Richters VEM, Cleij TJ, Jenneskens LW, Lutz M, Spek AL, van Walree CA. Synthesis and Structure of cis-1,4-Di(1-pyrenyl)decamethylcyclohexasilane. Organometallics 2003. [DOI: 10.1021/om020980r] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Veronica E. M. Kaats-Richters
- Debye Institute, Department of Physical Organic Chemistry, Utrecht University, Padualaan 8, 3584 CH Utrecht, The Netherlands, and Bijvoet Center for Biomolecular Research, Crystal and Structural Chemistry, Utrecht University, Padualaan 8, 3584 CH Utrecht, The Netherlands
| | - Thomas J. Cleij
- Debye Institute, Department of Physical Organic Chemistry, Utrecht University, Padualaan 8, 3584 CH Utrecht, The Netherlands, and Bijvoet Center for Biomolecular Research, Crystal and Structural Chemistry, Utrecht University, Padualaan 8, 3584 CH Utrecht, The Netherlands
| | - Leonardus W. Jenneskens
- Debye Institute, Department of Physical Organic Chemistry, Utrecht University, Padualaan 8, 3584 CH Utrecht, The Netherlands, and Bijvoet Center for Biomolecular Research, Crystal and Structural Chemistry, Utrecht University, Padualaan 8, 3584 CH Utrecht, The Netherlands
| | - Martin Lutz
- Debye Institute, Department of Physical Organic Chemistry, Utrecht University, Padualaan 8, 3584 CH Utrecht, The Netherlands, and Bijvoet Center for Biomolecular Research, Crystal and Structural Chemistry, Utrecht University, Padualaan 8, 3584 CH Utrecht, The Netherlands
| | - Anthony L. Spek
- Debye Institute, Department of Physical Organic Chemistry, Utrecht University, Padualaan 8, 3584 CH Utrecht, The Netherlands, and Bijvoet Center for Biomolecular Research, Crystal and Structural Chemistry, Utrecht University, Padualaan 8, 3584 CH Utrecht, The Netherlands
| | - Cornelis A. van Walree
- Debye Institute, Department of Physical Organic Chemistry, Utrecht University, Padualaan 8, 3584 CH Utrecht, The Netherlands, and Bijvoet Center for Biomolecular Research, Crystal and Structural Chemistry, Utrecht University, Padualaan 8, 3584 CH Utrecht, The Netherlands
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10
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Vink RLC, Barkema GT, van Walree CA, Jenneskens LW. Simulation of polysilane and polysilyne formation and structure. J Chem Phys 2002. [DOI: 10.1063/1.1425818] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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11
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Hatanaka Y, Okada S, Onozawa SY, Suzuki Y, Tanaka M. Synthesis and Unusual Spectral Properties of (Alkoxycarbonyl)methyl-Substituted Polysilanes. CHEM LETT 2001. [DOI: 10.1246/cl.2001.600] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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12
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Toyoda S, Fujiki M. Origin of Broad Visible Photoluminescence from Poly(alkylarylsilylene) Derivatives. Macromolecules 2001. [DOI: 10.1021/ma0002794] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Seiji Toyoda
- NTT Basic Research Laboratories, 3-1 Morinosato, Wakamiya, Atsugi, Kanagawa 243-0198, Japan
| | - Michiya Fujiki
- NTT Basic Research Laboratories, 3-1 Morinosato, Wakamiya, Atsugi, Kanagawa 243-0198, Japan
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13
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Seki S, Kunimi Y, Nishida K, Yoshida Y, Tagawa S. Electronic State of Radical Anions on Poly(methyl-n-propylsilane) Studied by Low Temperature Pulse Radiolysis. J Phys Chem B 2001. [DOI: 10.1021/jp001211t] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- S. Seki
- The Institute of Scientific and Industrial Research, Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka 567-0047, Japan
| | - Y. Kunimi
- The Institute of Scientific and Industrial Research, Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka 567-0047, Japan
| | - K. Nishida
- The Institute of Scientific and Industrial Research, Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka 567-0047, Japan
| | - Y. Yoshida
- The Institute of Scientific and Industrial Research, Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka 567-0047, Japan
| | - S. Tagawa
- The Institute of Scientific and Industrial Research, Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka 567-0047, Japan
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14
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Maeda K, Seki S, Tagawa S, Shibata H. Radiation effects on branching polysilanes. Radiat Phys Chem Oxf Engl 1993 2001. [DOI: 10.1016/s0969-806x(00)00417-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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15
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Cleij TJ, Tsang SKY, Jenneskens LW. Nonionic Water-Soluble Polysilynes. Synthesis and Properties of a Novel Class of Functionalized Materials. Macromolecules 1999. [DOI: 10.1021/ma982014j] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Thomas J. Cleij
- Debye Institute, Department of Physical Organic Chemistry, Utrecht University, Padualaan 8, 3584 CH Utrecht, The Netherlands
| | - Stellar K. Y. Tsang
- Debye Institute, Department of Physical Organic Chemistry, Utrecht University, Padualaan 8, 3584 CH Utrecht, The Netherlands
| | - Leonardus W. Jenneskens
- Debye Institute, Department of Physical Organic Chemistry, Utrecht University, Padualaan 8, 3584 CH Utrecht, The Netherlands
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Abstract
In the present study we examined the short term stability of liposomes in the freeze-dried state for different lipid compositions containing trehalose as a lyoprotectant. The retention of carboxyfluorescein and average vesicle size after rehydration were monitored as a function of the temperature to which the dry cakes were exposed for 0.5 h. The thermal behaviour of the cakes was analysed by modulated temperature differential scanning calorimetry, and acyl chain order and interaction between trehalose molecules and the phospholipid headgroups was studied by Fourier transform infrared spectroscopy. Induction of leakage, suppression of the (onset) bilayer transition temperature (Tm) and enhancement of the interaction between sugar and phospholipid molecules were observed below the glass transition temperature (Tg) for all lipid compositions studied. The above changes concurred with the melting transition of the bilayer. Two out of five lipid compositions showed no significant change in average vesicle size, indicating that leakage was not necessarily caused by vesicle fusion. In addition, leakage could not be explained in terms of a phase transition during rehydration of the liposomes. We conclude that for liposomes freeze-dried in trehalose the temperature range of the bilayer melting process is a better indicator than Tg for the maximal temperature to which liposomes may be exposed for a short period of time (0.5 h) without loss of stability.
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Affiliation(s)
- E C van Winden
- Department of Pharmaceutics, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, PO Box 80082, 3508 TB, Utrecht, The Netherlands
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Seki S, Yoshida Y, Tagawa S, Asai K. Electronic Structure of Radical Anions and Cations of Polysilanes with Structural Defects. Macromolecules 1999. [DOI: 10.1021/ma981241i] [Citation(s) in RCA: 65] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Shu Seki
- Institute of Scientific and Industrial Research, Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka 567-0047, Japan
| | - Yoichi Yoshida
- Institute of Scientific and Industrial Research, Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka 567-0047, Japan
| | - Seiichi Tagawa
- Institute of Scientific and Industrial Research, Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka 567-0047, Japan
| | - Keisuke Asai
- Faculty of Enginnering, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8654, Japan
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18
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Seki S, Tsuji S, Nishida K, Matsui Y, Yoshida Y, Tagawa S. Photo-Induced Reaction Dynamics in Poly(di-n-hexylsilylene) by Excimer Laser Flash Photolysis. CHEM LETT 1998. [DOI: 10.1246/cl.1998.1187] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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19
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Katz SM, Reichl JA, Berry DH. Catalytic Synthesis of Poly(arylmethylgermanes) by Demethanative Coupling: A Mild Route to σ-Conjugated Polymers. J Am Chem Soc 1998. [DOI: 10.1021/ja981806q] [Citation(s) in RCA: 53] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Sandra M. Katz
- Contribution from the Department of Chemistry and Laboratory for the Research on the Structure of Matter, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323
| | - Jennifer A. Reichl
- Contribution from the Department of Chemistry and Laboratory for the Research on the Structure of Matter, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323
| | - Donald H. Berry
- Contribution from the Department of Chemistry and Laboratory for the Research on the Structure of Matter, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323
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