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2004 Fiscal Year Final Research Report Summary

Development of the nano devices with photo-hydrogen-evolving abilities

Research Project

Project/Area Number 14340223
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field 機能・物性・材料
Research InstitutionKYUSHU UNIVERSITY (2004)
Tokyo University of Science (2002-2003)

Principal Investigator

SAKAI Ken  KYUSHU UNIVERSITY, Faculty of Science, Professor, 大学院・理学研究院, 教授 (30235105)

Project Period (FY) 2002 – 2004
Keywordshydrogen / platinum complex / photochemistry / catalysis / ruthenium complex / multinuclear metal complex
Research Abstract

There is an increasing understanding that the reserves of fossil fuels, such as oil, coal, and natural gas, are limited and the transition to renewable energies is necessary and urgent. In view of the global and regional environmental issues such as global warming and air pollution, it is generally considered that hydrogen would become an important supplement to oil, even though basic practical problems still need a solution. In spite of the rapid technological advance in the development of fuel-cell cars based on H_2 and 1/2O_2, the means of generating and storing hydrogen gas has not been well established as yet. In this context, the electrochemical decomposition of water into H_2 and 1/2O_2 is regarded as one of the candidates as a method of generating hydrogen, where wind power stations or solar batteries are considered as the source of electricity. Nevertheless, the energy return on energy invested in such systems still does not meet the criteria for the practical use. On the othe … More r hand, hydrogen is also known to be generated upon the treatment of methane with steam, which also leads to the emission of greenhouse gas (CO_2) as a byproduct. Moreover, this process requires the energy to produce the steam. Consequently, great attention has been paid to the studies on the photocatalytic systems promoting the solar-light-induced splitting of water into H_2 and 1/2O_2 because water and sunlight are abundant and such systems are free of the CO_2, emission.
In this regard, we have focused on a well-known photosystem consisting of EDTA, tris(2,2′-bipyridine)ruthenium(II), methylviologen, and hydrogen-evolving catalysts, where particular Pt(II) complexes serve as the catalysts. Further, continuous efforts have also been made to develop the photo-hydrogen-evolving molecular devices consisting of photosensitizing rnthenium(II) centers and platinum(II)-catalyst centers. Various heteronuclear Ru(II)Pt(II) or Ru(II)_2Pt(II)_2 complexes have been prepared and evaluated. However we have long been unable to demonstrate the usefulness of such molecular devices. We recently succeeded in the preparation of the first Ru(II)Pt(II)-based molecular device which effectively catalyzes visible-light-induced EDTA-reduction of water into molecular hydrogen. It has been confirmed that the observed H_2-evolving activity is not due to any photodecomposition products.
In the present study, to clarify the important factors which govern the photocatalytic activity of the Ru(II)Pt(II)-based molecular device, several other structural analogs have been prepared and their photo-H_2-evolving activities have been evaluated. As a result, the devices with peptide-linkage are found to evolve H_2 upon Xe-lamp irradiation in the presence of EDTA under Ar atmosphere. On the other hand, the compounds having two or more photosensitizing ruthenium(II) centers are found to be ineffective towards the photochemical H_2 generation, presumably due to the enhancement in intramolecular energy-transfer quenching processes. Less

  • Research Products

    (23 results)

All 2005 2004

All Journal Article (23 results)

  • [Journal Article] Total Synthesis of Epoxyquinols A, B, and C Epoxytwinol A and the Reactivity of a 2H-Pyran Derivative as the Diene Component in the Diels-Alder Reaction2005

    • Author(s)
      Mitsuru Shoji, Hiroki Imai, Makoto Mukaida, Ken Sakai, Hideaki Kakeya, Hiroyuki Osada, Yujiro Hayashi
    • Journal Title

      J.Org.Chem. 70

      Pages: 79-91

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Syntheses and Properties of Emissive Iridium(III) Complexes with Tridentate Benzimidazole Derivatives2005

    • Author(s)
      Tomona Yutaka, Shinya Obara, Satoshi Ogawa, Koichi Nozaki, Noriaki Ikeda, Takeshi Ohno, Youichi Ishii, Ken Sakai, Masa-aki Haga
    • Journal Title

      Inorg.Chem. 44

      Pages: 4737-4746

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Highly Diasteroselective and Remarkably-Facially Selective Lewis Acid-Catalysed Diels-Alder Cycloaddition Reactions : Access to Novel 1,3,4-Trisubstituted 2-Azetidinones2005

    • Author(s)
      Gaurav Bhargava, Mohinder P.Mahajan, Takao Saito, Takashi Otani, Mai Kurashima, Ken Sakai
    • Journal Title

      Eur.J.Org.Chem.

      Pages: 2397-2405

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] (2,2′-Bipyridine)chloro(4′-tolyl-2,2′:-6′,2"-terpyridine)iridium(III) bis(hexafluorophosphate) acetonitrile disolvate2005

    • Author(s)
      Tomona Yutaka, Shinya Obara, Masa-aki Haga, Yoshimi Yokoyama, Ken Sakai
    • Journal Title

      Acta Crystallogr. E61

      Pages: m1357-m1359

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Construction of Pseudo-Heterochiral and -Homochiral Di-m-oxotitanium (Schiff base) Dimers and Enantioselective Epoxidation Using Aqueous Hydrogen Peroxide2005

    • Author(s)
      K.Matsumoto, Y.Sawada, B.Saito, K.Sakai, T.Katsuki
    • Journal Title

      Angew.Chem.Int.Ed. 44

      Pages: 4935-4939

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Bis[tris(2,2'-bipyridune)ruthenium(II)] hexacyanoferrate(III) chloride octahydrate2004

    • Author(s)
      Ken Sakai, Yuichi Uchida, Takashi Kajiwara, Tasuku Ito
    • Journal Title

      Acta Crystalloger. C60

      Pages: m65-m68

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] bis(2,2'-bipyridune)(1,10-phenanthroline)ruthenium(II) tetracyanoplatinete(II)2004

    • Author(s)
      Ken Sakai, Yoshinobu Miyabe
    • Journal Title

      Acta Crystalloger. C60

      Pages: m69-m72

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] The First Bent Form for the Hydroxo-Bridged cis-Diammineplatinum(II) Dimer : [Pt2(NH3)4(m-OH)2](C104)22004

    • Author(s)
      Ken Sakai, Yosuke Konno, Noboru Takayama, Satoru Takahashi
    • Journal Title

      Acta Crystalloger. B60

      Pages: 255-262

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Electron-Rich Diplatinum(0) Metallocryptate Promoting Novel Successive Encapsulation of acidic Hydridse2004

    • Author(s)
      Eri Goto, Miho Usuki, Hiroe Takenaka, Ken Sakai, Tomoaki Tanaka
    • Journal Title

      Organometallics 23

      Pages: 6042-6051

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Reactive Rigid-Rod Organometallic Polymers Involving Linear Triplatinum Units Commected by p-Conjugated Bisisocyanides2004

    • Author(s)
      Tomoaki Tanase, Eri Goto, Rowshan A.Begum, Makiko Hamaguchi, Shuzhong Zhan, Masayasu Iida, Ken Sakai
    • Journal Title

      Organometallics 23

      Pages: 5975-5988

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Bis[di-m-isobutyrato-bis[cis-diammineplatinum(II)]] tetrakis(perchlorate)2004

    • Author(s)
      Ken Sakai, Eri Ishigami
    • Journal Title

      Acta Crystallogr. E60

      Pages: m65-m68

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Bis(2-aminopyridine)(2,2′-bipyridine)platinum(II) teracyanoplatinate(II) dihydrate2004

    • Author(s)
      Ken Sakai, Mina Mizota, Norinobu Akiyama
    • Journal Title

      Acta Crystallogr. E60

      Pages: m88-m90

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Bis[tris(2,2′-bipyridine)ruthenium(II)] hexacyanoferrate(III) chloride octahydrate2004

    • Author(s)
      Ken Sakai, Yuichi Uchida, Takashi Kajiwara, Tasuku Ito
    • Journal Title

      Acta Crystallogr. C60

      Pages: m65-m68

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] bis(2,2′-bipyridine)(1,10-Phenanthroline)ruthenium(II) tetracyanoplatinate(II)2004

    • Author(s)
      Ken Sakai, Yoshinobu Miyabe
    • Journal Title

      Acta Crystallogr. C60

      Pages: m69-m72

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Di-m-a-pyrrolidinonatobis[cis-diamminechloroplatinum(III)] sulfate dihydrate : a head-to-head isomer2004

    • Author(s)
      Ken Sakai, Itsuki Sakai, Takashi Kajiwara, Tasuku Ito
    • Journal Title

      Acta Crystallogr. E60

      Pages: m255-m258

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Di-m-a-pyrrolidinonatobis[cis-diammineplatinum(II)] sulfate hydrate in a Head-to-Head isomerism2004

    • Author(s)
      Ken Sakai, Itsuki Sakai, Neil D.Draper, Daniel B.Leznoff
    • Journal Title

      Acta Crystallogr. E60

      Pages: m273-m276

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] The First Bent Form for the Hydroxo-Bridged cis-Diammineplatinum(II) Dimer : [Pt2(NH3)4(m-OH)2](ClO4)22004

    • Author(s)
      Ken Sakai, Yosuke Konno, Noboru Takayama, Satoru Takahashi
    • Journal Title

      Acta Crystallogr. B60

      Pages: 255-262

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Di-m-aminopyridinato-bis[2,2′-bipyridine)platinum(II)] dinitrate tetrahydrate in a head-to-tail isomerism2004

    • Author(s)
      Mina Mizota, Ken Sakai
    • Journal Title

      Acta Crystallogr. E60

      Pages: m473-m476

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Di-m-pivalamidato-k4N,O-bis[(sulfato)(2,2′-bipyridine-k2N,N′)platinum(III)] tetrahydrate in a head-to-tail isomerism2004

    • Author(s)
      Kazuo Yokokawa, Ken Sakai
    • Journal Title

      Acta Crystallogr. C60

      Pages: m244-m247

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Bis[m-3-(N′-methyl-4,4′-bipyridinium-1-yl])propionamidato] bis[cis-diammineplatinum(II)] hexaperchlorate dihydrate in a head-to-tail isomerism2004

    • Author(s)
      Ken Sakai, Yoshimi Yokoyama, Hideki Hama, Kaoru Kato, Yoshie Ikuta, Taro Tsubomura, Tomoaki Tanase
    • Journal Title

      Acta Crystallogr. E60

      Pages: m664-m667

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Linear, Redox-Active Pt6 and Pt2Pt2 Clusters2004

    • Author(s)
      Eri Goto, Rowshan A.Begum, Shuzhong Zhan, Tomoaki Tanase, Katsumi Tanigaki, Ken Sakai
    • Journal Title

      Angew.Chem.Int.Ed. 43

      Pages: 5029-5032

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Electron-Rich Diplatinum(0) Metallocryptate Promoting Novel Successive Encapsulation of Acidic Hydrides2004

    • Author(s)
      Eri Goto, Miho Usuki, Hiroe Takenaka, Ken Sakai, Tomoaki Tanase
    • Journal Title

      Organometallics 23

      Pages: 6042-6051

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Reactive Rigid-Rod Organometallic Polymers Involving Linear Triplatinum Units Connected by p-Conjugated Bisisocyanides2004

    • Author(s)
      Tomoaki Tanase, Eri Goto, Rowshan A.Begum, Makiko Hamaguchi, Shuzhong Zhan, Masayasu Iida, Ken Sakai
    • Journal Title

      Organometallics 23

      Pages: 5975-5988

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 2007-12-13  

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