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Imae I, Nakamura Y, Komaguchi K, Ooyama Y, Ohshita J, Harima Y. Development of a simple method for fabrication of transparent conductive films with high mechanical strength. SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS 2012; 13:045005. [PMID: 27877505 PMCID: PMC5090561 DOI: 10.1088/1468-6996/13/4/045005] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/08/2012] [Accepted: 07/10/2012] [Indexed: 06/06/2023]
Abstract
We have developed a simple method of fabricating transparent conductive films with a high mechanical strength on glass and indium tin oxide substrates. It does not require a large excess of organic solvents and polymerization catalysts and can yield smooth films by spin-coating of a mixture of a commercially available aqueous dispersion of poly(3,4-ethylenedioxythiophene)-poly(4-styrene sulfonate) and a neat liquid of tetraethyl orthosilicate. Preparation conditions such as feed ratio, kinds of additives, and annealing temperature and time were optimized to give highly conductive, transparent and mechanically strong films.
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Kano Y, Kushimoto K, Komaguchi K, Ooyama Y, Imae I, Ohshita J, Harima Y. Intermolecular distances of carboxylated TEMPO derivatives on TiO2 evaluated by spin-probe ESR. Phys Chem Chem Phys 2012; 14:15988-90. [DOI: 10.1039/c2cp43015k] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Ooyama Y, Yamaguchi N, Inoue S, Nagano T, Miyazaki E, Fukuoka H, Imae I, Komaguchi K, Ohshita J, Harima Y. Mechanofluorochromism of carbazole-type D–π–A fluorescent dyes. Tetrahedron 2012. [DOI: 10.1016/j.tet.2011.11.012] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Ooyama Y, Nagano T, Inoue S, Imae I, Komaguchi K, Ohshita J, Harima Y. Dye-Sensitized Solar Cells Based on Donor-π-Acceptor Fluorescent Dyes with a Pyridine Ring as an Electron-Withdrawing-Injecting Anchoring Group. Chemistry 2011; 17:14837-43. [DOI: 10.1002/chem.201101923] [Citation(s) in RCA: 120] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2011] [Revised: 08/04/2011] [Indexed: 11/07/2022]
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Ooyama Y, Inoue S, Nagano T, Kushimoto K, Ohshita J, Imae I, Komaguchi K, Harima Y. Dye-Sensitized Solar Cells Based On Donor-Acceptor π-Conjugated Fluorescent Dyes with a Pyridine Ring as an Electron-Withdrawing Anchoring Group. Angew Chem Int Ed Engl 2011. [DOI: 10.1002/ange.201102552] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Ooyama Y, Inoue S, Nagano T, Kushimoto K, Ohshita J, Imae I, Komaguchi K, Harima Y. Dye-Sensitized Solar Cells Based On Donor-Acceptor π-Conjugated Fluorescent Dyes with a Pyridine Ring as an Electron-Withdrawing Anchoring Group. Angew Chem Int Ed Engl 2011; 50:7429-33. [DOI: 10.1002/anie.201102552] [Citation(s) in RCA: 218] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2011] [Revised: 05/30/2011] [Indexed: 11/09/2022]
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Harima Y, Setodoi S, Imae I, Komaguchi K, Ooyama Y, Ohshita J, Mizota H, Yano J. Electrochemical reduction of graphene oxide in organic solvents. Electrochim Acta 2011. [DOI: 10.1016/j.electacta.2011.03.117] [Citation(s) in RCA: 73] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Ooyama Y, Shimada Y, Inoue S, Nagano T, Fujikawa Y, Komaguchi K, Imae I, Harima Y. New molecular design of donor-π-acceptor dyes for dye-sensitized solar cells: control of molecular orientation and arrangement on TiO2surface. NEW J CHEM 2011. [DOI: 10.1039/c0nj00585a] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Ooyama Y, Sumomogi M, Nagano T, Kushimoto K, Komaguchi K, Imae I, Harima Y. Detection of water in organic solvents by photo-induced electron transfer method. Org Biomol Chem 2011; 9:1314-6. [DOI: 10.1039/c0ob00933d] [Citation(s) in RCA: 84] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Ooyama Y, Matsugasako A, Oka K, Nagano T, Sumomogi M, Komaguchi K, Imae I, Harima Y. Fluorescence PET (photo-induced electron transfer) sensors for water based on anthracene–boronic acid ester. Chem Commun (Camb) 2011; 47:4448-50. [DOI: 10.1039/c1cc10470e] [Citation(s) in RCA: 104] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Imae I, Tokita D, Ooyama Y, Komaguchi K, Ohshita J, Harima Y. Charge transport properties of polymer films comprising oligothiophene in silsesquioxane network. Polym Chem 2011. [DOI: 10.1039/c0py00387e] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Ooyama Y, Nagano T, Inoue S, Imae I, Komaguchi K, Harima Y. Dye-Sensitized Solar Cells Based on D–π–A Fluorescent Dyes with Pyridine Ring Forming Strong Interaction with Nanocrystalline TiO2. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2010. [DOI: 10.1246/bcsj.20100098] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Ooyama Y, Ito G, Fukuoka H, Nagano T, Kagawa Y, Imae I, Komaguchi K, Harima Y. Mechanofluorochromism of heteropolycyclic donor–π-acceptor type fluorescent dyes. Tetrahedron 2010. [DOI: 10.1016/j.tet.2010.07.018] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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Harima Y, Komaguchi K, Oka K, Maruoka T, Imae I, Ooyama Y. Trapping of atomic hydrogens in cage-shaped silsesquioxanes by electric discharge. Chem Commun (Camb) 2010; 46:2076-8. [PMID: 20221497 DOI: 10.1039/b917165g] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A simple and safe technique which is based on glow discharge is demonstrated for stable encapsulation of H atoms in cage-shaped silsesquioxanes at room temperature, leading to the encapsulation yield of ca. 10(-4) H atoms per molecule for 10-minute discharging, much faster than the conventional gamma-ray irradiation technique.
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Harima Y, Ishiguro Y, Fujikawa Y, Hashiguchi T, Komaguchi K, Ooyama Y, Imae I, Ohshita J. Absorption spectra of field-generated cation radical in triphenyldiamine film: Lack of intervalence-charge transfer band. Chem Phys Lett 2010. [DOI: 10.1016/j.cplett.2009.12.021] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Ooyama Y, Ito G, Kushimoto K, Komaguchi K, Imae I, Harima Y. Synthesis and fluorescence and electrochemical properties of D–π-A structural isomers of benzofuro[2,3-c]oxazolo[4,5-a]carbazole-type and benzofuro[2,3-c]oxazolo[5,4-a]carbazole-type fluorescent dyes. Org Biomol Chem 2010; 8:2756-70. [DOI: 10.1039/c003526b] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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Imae I, Takayama S, Tokita D, Ooyama Y, Komaguchi K, Ohshita J, Sugioka T, Kanehira K, Harima Y. Development of anchored oligothiophenes on substrates for the application to the tunable transparent conductive films. POLYMER 2009. [DOI: 10.1016/j.polymer.2009.10.058] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Ooyama Y, Inoue S, Asada R, Ito G, Kushimoto K, Komaguchi K, Imae I, Harima Y. Dye-Sensitized Solar Cells Based on a Novel Fluorescent Dye with a Pyridine Ring and a Pyridinium Dye with the Pyridinium Ring Forming Strong Interactions with Nanocrystalline TiO2 Films. European J Org Chem 2009. [DOI: 10.1002/ejoc.200900983] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Ooyama Y, Shimada Y, Ishii A, Ito G, Kagawa Y, Imae I, Komaguchi K, Harima Y. Photovoltaic performance of dye-sensitized solar cells based on a series of new-type donor–acceptor π-conjugated sensitizer, benzofuro[2,3-c]oxazolo[4,5-a]carbazole fluorescent dyes. J Photochem Photobiol A Chem 2009. [DOI: 10.1016/j.jphotochem.2009.01.017] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Ooyama Y, Asada R, Inoue S, Komaguchi K, Imae I, Harima Y. Solvatochromism of novel donor–π–acceptor type pyridinium dyes in halogenated and non-halogenated solvents. NEW J CHEM 2009. [DOI: 10.1039/b9nj00332k] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Imae I, Takenaka Y, Tokita D, Ooyama Y, Komaguchi K, Harima Y. Drastic Enhancement of Cycle Lifetime of Electrochromic Devices Using Polysilsesquioxane as an Anchoring Agent. CHEM LETT 2008. [DOI: 10.1246/cl.2008.964] [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]
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Harima Y, Jiang X, Patil R, Komaguchi K, Mizota H. Influence of film structure on mobilities of charge carriers in conducting polymers. Electrochim Acta 2007. [DOI: 10.1016/j.electacta.2007.07.007] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Komaguchi K, Matsubara Y, Shiotani M, Gustafsson H, Lund E, Lund A. An ESR and ENDOR study of irradiated 6Li-formate. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2007; 66:754-60. [PMID: 16875868 DOI: 10.1016/j.saa.2006.04.023] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/06/2005] [Accepted: 04/26/2006] [Indexed: 05/11/2023]
Abstract
Lithium formate ((6)LiOOCH.H(2)O), 95% (6)Li enrichment, combined with an exchange of crystallization water with D(2)O was investigated. The ESR spectrum of the radiation induced free radicals stable at room temperature consists of a singlet with a narrow line width, 0.92mT. (6)Li has smaller magnetic moment and nuclear spin, which resulted in the narrower line width accompanied with an increase in peak amplitude. In comparison with lithium formate with natural isotopic composition, (6)Li (7.5%, I=1) and (7)Li (92.5%, I=3/2), the sensitivity was increased by a factor of two. With optimised spectrometer settings (6)Li formate had seven times higher sensitivity compared to alanine. Therefore this material is proposed as a dosimeter material in a dose range down to 0.1Gy. The g and the (13)C-hyperfine (hf) tensors of the CO(2)(-) radical anion, major paramagnetic products, were evaluated to be g=(2.0037, 1.9975, 2.0017), and A((13)C)=(465.5, 447.5, 581.3) MHz for polycrystalline samples at room temperature. Furthermore, the (1)H-hf and (6)Li-hf tensors observed for the surroundings of CO(2)(-) by ENDOR technique were in fairly good agreement with DFT calculations. The CO(2)(-) radicals are found to be so stable that the formate is applicable to the ESR dosimetry, because of fully relaxing in a fully relaxed geometrical structure of the CO(2)(-) component and remaining tight binding with the surroundings after the H atom detachment from HCO(2)(-).
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Komaguchi K, Nomura K, Shiotani M. High-resolution ESR study of the H...CH3, H...CHD2, D...CH2D, and D...CD3 radical pairs in solid argon. J Phys Chem A 2007; 111:726-33. [PMID: 17249765 DOI: 10.1021/jp063723z] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
High-resolution electron spin resonance (ESR) spectra of radical pairs of a hydrogen atom that coupled with a methyl radical (H...CH3, H...CHD2, D...CH2D, and D...CD3) were observed for X-ray irradiated solid argon containing selectively deuterium-labeled methanes, CH4, CH2D2, and CD4, at 4.2 K. The double-quartet 1H-hyperfine (hf) splittings of ca. 26 and 1.16 mT at the Deltam(s) = +/-1 and Deltam(s) = +/-2 transitions, which are one-half of the isotropic 1H-hf splittings of an isolated H-atom and a CH3 radical, were attributed to the H...CH3 pair. The 1H-hf splittings at the Deltam(s) = +/-1 transition were further split by the fine structure (fs) due to the electron dipole-dipole coupling. Because of the high-resolution spectra, three different sets of the fs splitting, d, are clearly resolved in the spectra of both the H...CH3 and the D...CD3 pairs. The separation distance (inter-spin distance), R, between the H-atom and the CH3 radical being in pairs was evaluated from the d values based on a point-dipole interaction model. For the case of the H...CH3 pair, the observed d values of 4.2, 4.9, and 5.1 mT yield the respective separations, R = 0.87, 0.83, and 0.82 nm, to probe the trapping site of the pair in an Ar crystalline lattice (fcc). For the pair with R = 0.87 nm, for example, we propose that the CH3 radical occupies a substitutional site and the counter H-atom occupies either the interstitial tetrahedral sites directed away from the CH3 radicals by a distance of 0.87 nm or the interstitial octahedral sites by a distance of 0.88 nm. When a mixture of CH4 and CD4 in a solid Ar matrix was irradiated, only two different radical pairs, H...CH3 and D...CD3, were observed. This result clearly demonstrates that the hydrogen atom and methyl radicals, which undergo a pairwise trapping, can originate from the same methane molecule.
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Yamanaka S, Kubo A, Inumaru K, Komaguchi K, Kini NS, Inoue T, Irifune T. Electron conductive three-dimensional polymer of cuboidal C60. PHYSICAL REVIEW LETTERS 2006; 96:076602. [PMID: 16606117 DOI: 10.1103/physrevlett.96.076602] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/06/2005] [Indexed: 05/08/2023]
Abstract
Single crystals of three-dimensional (3D) C60 polymer were prepared by the topotactic conversion of two-dimensional (2D) C60 polymer single crystals at a pressure of 15 GPa at 600 degrees C. The x-ray single crystal study revealed that the 3D C60 polymer crystallized in a body centered orthorhombic space group Immm, and spherical C60 monomer units were substantially deformed to rectangular parallelepiped (cuboidal) shapes, each unit being bonded to eight cuboidal C60 neighbors via [3 + 3] cycloaddition. The 3D C60 polymer was electron conductive, in contrast with the nonconductive behavior of 2D polymers.
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