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Photocharge separation using supramolecular complex of π-electron type extended viologen derivative and porphyrin

外国特許コード F110005555
整理番号 A121-62WO
掲載日 2011年9月8日
出願国 アメリカ合衆国
出願番号 59203705
公報番号 20080202578
公報番号 8436242
出願日 平成17年3月9日(2005.3.9)
公報発行日 平成20年8月28日(2008.8.28)
公報発行日 平成25年5月7日(2013.5.7)
国際出願番号 JP2005004134
国際公開番号 WO2005087741
国際出願日 平成17年3月9日(2005.3.9)
国際公開日 平成17年9月22日(2005.9.22)
優先権データ
  • 特願2004-068247 (2004.3.10) JP
  • 2005JP004134 (2005.3.9) WO
発明の名称 (英語) Photocharge separation using supramolecular complex of π-electron type extended viologen derivative and porphyrin
発明の概要(英語) Long-lived charge separation is attained with high efficiency by using a supramolecular complex utilizing pi-pi interaction.
A supramolecular complex is formed by pi-pi interaction between extended viologen, the extended viologen having heteroaryls coupled together by a linking group with pi-electron conjugated system, and porphyrin.
As a result of study of photoelectron transfer reaction, it has been found that within the supramolecular complex, efficient electron transfer occurs from the singlet excited state of porphyrin to the extended viologen, thereby obtaining a charge separation condition of extremely long lifetime exceeding 1 millisecond.
従来技術、競合技術の概要(英語) BACKGROUND ART
Conventionally, known artificial photosynthetic reaction center molecules are those in which an electron donor molecule and an electron acceptor molecule are linked by a covalent bond.
For example, J. Phys. Chem. A 2002, 106, 3243-3252 (non-patent document 1) discloses a compound in which porphyrin and fullerene are linked by a covalent bond.
However, since it is cumbersome to synthesize a compound in which an electron donor molecule (donor) and an electron acceptor molecule (acceptor) are linked by a covalent bond, it is difficult to extend the compound to a more complex system.
On the other hand, numerous attempts have been made to form a supramolecular complex between an electron donor molecule and an electron acceptor molecule by using a non-covalent bond, so as to allow the supramolecular complex to function as an artificial photosynthetic reaction center.
As compared with the use of covalent bond, the formation of a supramolecular using a non-covalent bond such as metal-ligand coordination or hydrogen bond is attracting more and more people's attention in recent years as a simple but elegant method of constructing a biological photosynthetic reaction center model system.
However, with these materials, there is the disadvantage that the charge-separated state cannot be maintained for a long period of time, so there has been a demand for a material that can be used as an artificial photosynthetic reaction center that can maintain the charge-separated state for a long period of time.
On the other hand, regarding weak pi -pi interaction, it has been considered that sufficient performance for a donor-acceptor-linked molecule cannot be obtained due to the weakness of its interaction.
Therefore, supramolecular complexes using weak pi -pi interaction have not been studied.
Non-patent document 1: J. Phys. Chem. A 2002, 106, 3243-3252

特許請求の範囲(英語) [claim1]
1. A supramolecular complex comprising extended viologen and porphyrin, wherein the extended viologen is selected from any of the following formulas V-1 to V-6:
wherein, R1 and R2 are independently hydrogen or an alkyl having from 1 to 20 carbons; and n is 2or 3, and wherein said porphyrin is P-1:
wherein the supramolecular complex is formed by pi -pi interaction between the extended viologen and the porphyrin.
[claim2]
2. The supramolecular complex according to claim 1, wherein the extended viologen is V-2.
[claim3]
3. The supramolecular complex according to claim 2, wherein said R1 and R2 are C6H13.
[claim4]
4. The supramolecular complex according to claim 3, wherein n is 2.
  • 発明者/出願人(英語)
  • FUKUZUMI SHUNICHI
  • JAPAN SCIENCE AND TECHNOLOGY AGENCY
国際特許分類(IPC)
米国特許分類/主・副
  • 136/252
  • 136/263
  • 204/157.52
  • 502/173
  • 540/145
参考情報 (研究プロジェクト等) CREST Creation and Functions of New Molecules and Molecular Assemblies AREA
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