• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Theoretical Study on the Photoreactions of Biological Compounds

Research Project

Project/Area Number 09450314
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field 工業物理化学
Research InstitutionThe University of Tokyo

Principal Investigator

HIRAO Kimihiko  The University of Tokyo, Graduate School of Engineering, Professor, 大学院・工学系研究科, 教授 (70093169)

Co-Investigator(Kenkyū-buntansha) TAKETSUGU Tetsuya  The University of Tokyo, Graduate School of Engineering, Assistant Professor, 大学院・工学系研究科, 助手 (90280932)
NAKANO Haruyuki  The University of Tokyo, Graduate School of Engineering, Lecturer, 大学院・工学系研究科, 講師 (90251363)
Project Period (FY) 1997 – 1998
Project Status Completed (Fiscal Year 1998)
Budget Amount *help
¥13,300,000 (Direct Cost: ¥13,300,000)
Fiscal Year 1998: ¥5,100,000 (Direct Cost: ¥5,100,000)
Fiscal Year 1997: ¥8,200,000 (Direct Cost: ¥8,200,000)
KeywordsMRMP / CASVB / Excited states / Alternant hydrocarbon / porphyrin / OP / RESC / Molecular Integrals / O-バンド / RESC相対論理論 / MRMP / ポリフィリン / 密度汎関数 / cusp条件
Research Abstract

Our Multireference Moller-Plesset (MRMP) theory is an extension of the closed-shell single reference MP method and has been successfully applied to numerous chemical and spectroscopic problems. MRMP has established through this study as an efficient technique for treating both dynamical and nondynamical correlation effects. MRMP was applied to the study of the valence pi*pi^* excited states of polyenes, polyacenes, and porphyrins. MRMP satisfactorily describes the ordering of low-lying valence pi*pi^* excited states for alternant hydrocarbons. MRMP predicts the valence excitation energies with an accuracy of 0.2 eV or better. The MRMP approach with the alternant pairing properties has proved to be of great value in understanding and predicting the experimental data of the alternant hydrocarbons. The conclusion derived in this study is to some extent transferable and thus provides a reasonable basis for a description of the excited states of other larger polyenes, polyacenes and porphyr … More ins. We have also proposed a complete active space valence bond (CASVB) method. A CASVB wave function can be obtained simply by transforming a canonical CASSCF function and readily interpreted in terms of the well-known classical VB resonance structures. The CASVB affords a clear view of the wave functions for the various states. In addition, we have proposed several new theory and concepts : MRMP in the extended basis function space (EBS), relativistic MRMP with a new relativistic scheme by eliminating small-component (RESC) of the four-component Dirac equation. EBS-MRMP is a theory based on a concept of different bases for different correlation effects. The new RESC-scheme is a very promising alternative to the Dirac method. We have also proposed a new simplified Colle-Salvetti-type correlation functional called OP in density functional theory. OP includes only one-parameter and no adjusted functional constant. OP satisfies all the necessary conditions of the exact correlation functional. OP is proved to give more accurate correlation energies for atoms and equivalent chemical properties for G2 set of molecules. Less

Report

(3 results)
  • 1998 Annual Research Report   Final Research Report Summary
  • 1997 Annual Research Report
  • Research Products

    (24 results)

All Other

All Publications (24 results)

  • [Publications] T.Hashimoto: "Theoretical study of the Q and B bands of free-base,magnesium,and zinc porphyrins,and their derivatives" J.Phys.Chem.(in press). (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Y.Kawashima: "Theoretical study of the valence π-π^* excited states of polyacenes" Theor.Chem.Accounts(Prof Fukui Memorial Issue). (in press). (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Yoong-Kee Choe: "Theoretical study of the electronic ground state of Iron(II)Porphine" Chem.Phys.Lett.295. 380-388 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] T.Hashimoto: "Theoretical study of valence and Rydberg excited states of benzene revisited" Theochem(Huzinaga Special Issue). 451. 25-33 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Masato Yamanishi: "Theoretical Study of the Low-lying Electronic States of XeO and XeS" J.Chem.Phys.108. 1514-1521 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] K.Nakayama: "Theoretical study of the π-π^* excited states of linear polyenes" Intern.J.Quantumn Chem.66. 157-175 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] T.Hashimoto: "Theoretical study of the Q and B bands of free-base, magnesium, and zinc porphyrins, and their derivatives" J.Phys.Chem.(in press). (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Y.Kawashima: "Theoretical study of the valence pi-pi* excited states of polyacenes" Theor.Chem.Accounts (Prof.Fukui Memorial Issue). (in press). (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Yoong-Kee Choe: "Theoretical study of the electronic ground state of Iron (II) Porphine" Chem.Phys.Lett.295. 380-388 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] T.Hashimoto: "Theoretical study of valence and Rydberg excited states of benzene revisited" Theochem (Huzinaga Special Issue). 451. 25-33 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Masato Yamanishi: "Theoretical study of the Low-lying Electronic States of XeO and XeS" J.Chem.Phys.108. 1514-1521 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] K.Nakayama: "Theoretical study of the pi-pi* excited states of linear polyenes" Intern.J.Quantumn Chem.66. 157-175 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] T.Hashimoto: "Theoretical study of the Q and B bands of free-base, magnesium, and zine porphyrins, and their derivatives" J.Phys.Chem.(in press). (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] Y.Kawashima: "Theoretical study of the valence π-π^* excited states of polyacenes" Theor.Chem.Accounts (Prof.Fukui Memorial Issue). (in press). (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] Yoong-Kee Choe: "Theoretical study of the electronic ground state of Iron (II) Porphine" Chem.Phys.Lett.295. 380-388 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] T.Hashimoto: "Theoretical study of valence and Rydberg excited states of benzene revisited" Theochem (Huzinaga Special Issue). 451. 25-33 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] Masato Yamanishi: "Theoretical Study of the Low-lying Electronic States of XeO and XeS" J.Chem.Phys.108. 1514-1521 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] K.Nakayama: "Theoretical study of the π-π^* excited states of linear polyenes" Intern.J.Quantumn Chem.66. 157-175 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] M.Yamanishi, K.Hirao K.Yamashita: "Theoretical study of low-lying electronic states of XeO and XeS." J.Chem.Phys.108. 1514-1521 (1998)

    • Related Report
      1997 Annual Research Report
  • [Publications] T.Taketsugu, K.Hirao: "A least-action vibrational method for determining tunneling paths in multidimensional systems" J.Chem.Phys.107. 10506-10514 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] H.Tatewaki, T.Hashimoto K.Hirao: "Contracted polarization functions for B to Ar" Theor.Chem.Accounts. 98. 71-74 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] K.Hirao, H.Nakano K.Nakayama: "A complete active space valence bond method with nonorthogonal orbitals" J.Chem.Phys.107. 9966-9974 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] T.Hashimoto, K.Hira H.Tatewaki: "Contracted or uncontracted polarization functions? Comment on Dunning's correlation-consistent--basis sets" Chem.Phys.Lett.273. 345-352 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] T.Yanai, T.Taketsugu K.Hirao: "Theoretical study of bifurcating reaction path" J.Chem.Phys.107. 1137-1146 (1997)

    • Related Report
      1997 Annual Research Report

URL: 

Published: 1997-04-01   Modified: 2016-04-21  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi