JP4201339B2 - パイ電子系拡張ビオローゲン誘導体とポルフィリンとの超分子錯体を用いる光電荷分離 - Google Patents
パイ電子系拡張ビオローゲン誘導体とポルフィリンとの超分子錯体を用いる光電荷分離 Download PDFInfo
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- 150000004032 porphyrins Chemical class 0.000 title claims 4
- 238000000926 separation method Methods 0.000 title 1
- 229910052739 hydrogen Inorganic materials 0.000 claims 4
- 239000001257 hydrogen Substances 0.000 claims 4
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims 4
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims 3
- 238000000034 method Methods 0.000 claims 3
- JFDZBHWFFUWGJE-UHFFFAOYSA-N benzenecarbonitrile Natural products N#CC1=CC=CC=C1 JFDZBHWFFUWGJE-UHFFFAOYSA-N 0.000 claims 2
- 239000003054 catalyst Substances 0.000 claims 2
- 239000011941 photocatalyst Substances 0.000 claims 2
- 229910052697 platinum Inorganic materials 0.000 claims 2
- 239000002904 solvent Substances 0.000 claims 2
- 230000002194 synthesizing effect Effects 0.000 claims 2
- 108010059332 Photosynthetic Reaction Center Complex Proteins Proteins 0.000 claims 1
- 125000000217 alkyl group Chemical group 0.000 claims 1
- JFDZBHWFFUWGJE-KWCOIAHCSA-N benzonitrile Chemical group N#[11C]C1=CC=CC=C1 JFDZBHWFFUWGJE-KWCOIAHCSA-N 0.000 claims 1
- 150000002431 hydrogen Chemical class 0.000 claims 1
- 230000001678 irradiating effect Effects 0.000 claims 1
- 239000000463 material Substances 0.000 claims 1
- 239000000758 substrate Substances 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims 1
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Description
J.Phys.Chem.A 2002,106,3243−3252
拡張ビオローゲンとポルフィリンとにより形成される超分子錯体であって、該拡張ビオローゲンが、以下の一般式1で表され:
Het1およびHet2は独立してヘテロアリールであり、該ヘテロアリールは、それぞれ、その環中にヘテロ原子として窒素原子を含み、Het1の窒素原子はR1に結合しており、Het2の窒素原子はR2に結合しており、
nは2または3である、
超分子錯体。
上記項1に記載の超分子錯体であって、前記拡張ビオローゲンが以下の式V−1〜V−6のいずれかから選択される、超分子錯体:
上記項1に記載の超分子錯体であって、前記ポルフィリンが、その5位、10位、15位および20位に、フェニル基もしくは置換フェニル基を有する、超分子錯体。
上記項1に記載の超分子錯体であって、前記ポルフィリンが以下のP−1〜P−4から選択される、超分子錯体。
上記項1に記載の超分子錯体を合成する方法であって、前記拡張ビオローゲンと前記ポルフィリンとを溶媒中で混合する工程を包含する、方法。
上記項8に記載の方法であって、前記溶媒がベンゾニトリルである、方法。
上記項1に記載の超分子錯体からなる人工光合成反応中心用材料。
上記項1に記載の超分子錯体と、白金触媒とを含む、水素発生光触媒。
水素を合成する方法であって、上記項1に記載の超分子錯体と白金触媒とを含む水素発生光触媒の存在下で、水に光を照射する工程を包含する、方法。
光を電流に変換するための素子であって、導電性基材上に積層された超分子錯体を有し、該超分子錯体が、上記項1に記載された超分子錯体である、素子。
本発明に用いられるポルフィリンは、非置換のポルフィリンであってもよく、ポルフィリンとしての性能を損なわない範囲で任意の置換基を有するものであってもよい。例えば、ポルフィリン中の5位、10位、15位、および20位、すなわちピロール環とピロール環との間のメチン基の炭素原子において、置換基としてアルキル、アリールまたはアルキル置換アリールもしくはハロゲン置換アリールを有することができる。この置換基は、好ましくはフェニルまたは置換フェニルであり、より好ましくはフェニルまたはアルキル置換フェニルもしくはハロゲン置換フェニルであり、さらに好ましくは、フェニルまたはジアルキル置換フェニルもしくはジクロロ置換フェニルであり、特に好ましくはフェニルまたは3,5−ジターシャリーブチルフェニルもしくは2,6−ジクロロフェニルである。なお、ポルフィリンの5位、10位、15位、および20位はすべて同じ置換基を有することが好ましいが、必要に応じて、2〜4種類の置換基を5位、10位、15位、および20位の4ヶ所に導入してもよい。
本発明に使用される拡張ビオローゲンとは、アルキル置換ヘテロアリールとアルキル置換ヘテロアリールとがπ電子の共役系を形成し得る連結基により連結されてその2つのヘテロアリール環および連結基が合わせて1つのπ電子共役系を形成する化合物であり、以下の一般式で示される。
nは2または3である。1つの好ましい実施態様においてnは2である。
本発明の方法に用いる溶媒としては、原料となるポルフィリンと拡張ビオローゲンを溶解できる限り、特に限定されない。好ましくは、ベンゾニトリルである。
ポルフィリンと拡張ビオローゲンとは、適切な溶媒中で混合することにより、超分子錯体を形成することができる。
本発明の超分子錯体は、光誘起電子移動反応を行うことができる。超分子錯体の光誘起電子移動反応は、後述する実施例に説明する方法などにより確認することができる。
本明細書中において光エネルギー変換材料とは、光を電気エネルギーに変換する材料をいう。光エネルギー変換材料は、太陽電池、フォトセンサーなどの素子に使用可能であり、それらの素子について公知の製造方法において本発明の材料を用いることにより、優れた性能を有する素子を製造することができる。
本発明の超分子錯体は、人工光合成反応中心用材料として使用可能である。従来から、電子供与体分子と電子受容体分子とを共有結合させた人工光合成反応中心用材料が知られているが、そのような従来の人工光合成反応中心用材料と同様に本発明の超分子錯体を人工光合成反応中心として使用することができる。
本発明の超分子錯体は、水素発生光触媒に利用することができる。従来から、水還元触媒と、ポルフィリン誘導体とを組み合わせた水素発生光触媒が知られているが、その従来の触媒のポルフィリン誘導体の代わりに本発明の超分子錯体を使用することにより、本発明の水素発生光触媒を得ることができる。例えば、ガラスなどの基板上に白金触媒を積層し、さらにその上に超分子錯体を積層することにより、水素発生光触媒とすることができる。
本発明の超分子錯体は、水素合成方法に利用することができる。例えば、超分子錯体と白金触媒とを含む水素発生光触媒の存在下で、水に光を照射することにより、水が還元された水素を発生することができる。
本発明の超分子錯体は、従来公知の光を電流に変換する素子のための材料として有効に使用され得る。例えば、光電変換素子のための材料として使用可能である。素子の構成としては、従来公知の任意の構成が採用可能である。例えば、導電性基板上に超分子錯体を積層すれば、光を電流に変換する素子を得ることができる。
π電子系拡張ビオローゲンとして、ブタジエン骨格でπ系を広げたBHV2+を用いた。また、比較のために、ブタジエン骨格を有さないビオローゲン(HV2+)を用いた。
超分子錯体BHV2+−(P−1)+における光誘起電子移動の発生は、図2に示されるように、ナノ秒レーザーフラッシュ光分解を使用してPhCN中において、ポルフィリン−BHV2+π−錯体の一過性の吸収スペクトルにより確認された。図2において観測された一過性の吸収帯は、PhCN中のポルフィリンラジカルカチオンに起因する吸収帯とBHV2+の吸収帯との重ね合わせと一致する。従って、図2の一過性の吸収スペクトルは、超分子錯体におけるポルフィリンの一重項励起状態からBHV2+への光誘起電子移動による、ポルフィリン−BHV2+π−錯体のCS状態の形成を明らかに示す。
Claims (9)
- 請求項1に記載の超分子錯体であって、前記拡張ビオローゲンが式V−2で示される、超分子錯体。
- 請求項1に記載の超分子錯体であって、前記R1およびR2がC6H13である、超分子錯体。
- 請求項1に記載の超分子錯体を合成する方法であって、前記拡張ビオローゲンと前記ポルフィリンとを溶媒中で混合する工程を包含する、方法。
- 請求項4に記載の方法であって、前記溶媒がベンゾニトリルである、方法。
- 請求項1に記載の超分子錯体からなる人工光合成反応中心用材料。
- 請求項1に記載の超分子錯体と、白金触媒とを含む、水素発生光触媒。
- 水素を合成する方法であって、請求項1に記載の超分子錯体と白金触媒とを含む水素発生光触媒の存在下で、水に光を照射する工程を包含する、方法。
- 光を電流に変換するための素子であって、導電性基材上に積層された超分子錯体を有し、該超分子錯体が、請求項1に記載された超分子錯体である、素子。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004068247A JP4201339B2 (ja) | 2004-03-10 | 2004-03-10 | パイ電子系拡張ビオローゲン誘導体とポルフィリンとの超分子錯体を用いる光電荷分離 |
PCT/JP2005/004134 WO2005087741A1 (ja) | 2004-03-10 | 2005-03-09 | パイ電子系拡張ビオローゲン誘導体とポルフィリンとの超分子錯体を用いる光電荷分離 |
US10/592,037 US8436242B2 (en) | 2004-03-10 | 2005-03-09 | Photocharge separation using supramolecular complex of π-electron type extended viologen derivative and porphyrin |
EP05720405A EP1724261A4 (en) | 2004-03-10 | 2005-03-09 | PHOTO-COLD DISTRACTION USING A PI-ELECTRON TYPE SUPRAMOLE-COMPLEX COMPLEX BETWEEN AN ADVANCED VIOLOGICAL DERIVATIVE AND PORPHYRINE |
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US8436242B2 (en) | 2013-05-07 |
JP2005255603A (ja) | 2005-09-22 |
WO2005087741A1 (ja) | 2005-09-22 |
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