Porphyrin-fullerene dyad with a long linker: Formation of charge transfer conformer in Langmuir-Blodgett film

Nikolai V. Tkachenko; Visa Vehmanen; Juha Pekka Nikkanen; Hiroko Yamada; Hiroshi Imahori; Shunichi Fukuzumi; Helge Lemmetyinen

doi:10.1016/S0009-2614(02)01592-0

Porphyrin-fullerene dyad with a long linker: Formation of charge transfer conformer in Langmuir-Blodgett film

Nikolai V. Tkachenko, Visa Vehmanen, Juha Pekka Nikkanen, Hiroko Yamada, Hiroshi Imahori, Shunichi Fukuzumi, Helge Lemmetyinen

Department of Chemistry & Nanoscience

Research output: Contribution to journal › Article › peer-review

29 Scopus citations

Abstract

A porphyrin-fullerene covalently linked dyad is studied in solutions and Langmuir-Blodgett (LB) films. The dyad is characterized by a relatively long linker. In benzonitrile, it performs a relatively slow photo-induced electron transfer (ET), k_ET ≈ 5 × 10⁸ s^-1. Being incorporated in an LB film the dyad forms a compact conformer, which takes the smallest surface area. For this conformer the donor-acceptor separation is much shorter as compared with that in liquid phases and the molecule perform a fast photo-induced ET, k_ET ≈ 8 × 10⁹ s^-1. The LB films were studied using time-resolved measurements of fluorescence, absorption, and Maxwell displacement charge.

Original language	English
Pages (from-to)	245-252
Number of pages	8
Journal	Chemical Physics Letters
Volume	366
Issue number	3-4
DOIs	https://doi.org/10.1016/S0009-2614(02)01592-0
State	Published - 10 Dec 2002

Bibliographical note

Funding Information:
This work was supported by the Academy of Finland, the National Technology Agency of Finland and Grant-in-Aids (No. 11740352 to H.I., Nos. 11555230 and 11694079 to S.F.) and the Development of Innovative Technology (No. 12310) from Ministry of Education, Science, Sports and Culture, Japan. H.I. thanks the Nagase Foundation for financial support.

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title = "Porphyrin-fullerene dyad with a long linker: Formation of charge transfer conformer in Langmuir-Blodgett film",

abstract = "A porphyrin-fullerene covalently linked dyad is studied in solutions and Langmuir-Blodgett (LB) films. The dyad is characterized by a relatively long linker. In benzonitrile, it performs a relatively slow photo-induced electron transfer (ET), kET ≈ 5 × 108 s-1. Being incorporated in an LB film the dyad forms a compact conformer, which takes the smallest surface area. For this conformer the donor-acceptor separation is much shorter as compared with that in liquid phases and the molecule perform a fast photo-induced ET, kET ≈ 8 × 109 s-1. The LB films were studied using time-resolved measurements of fluorescence, absorption, and Maxwell displacement charge.",

author = "Tkachenko, {Nikolai V.} and Visa Vehmanen and Nikkanen, {Juha Pekka} and Hiroko Yamada and Hiroshi Imahori and Shunichi Fukuzumi and Helge Lemmetyinen",

note = "Funding Information: This work was supported by the Academy of Finland, the National Technology Agency of Finland and Grant-in-Aids (No. 11740352 to H.I., Nos. 11555230 and 11694079 to S.F.) and the Development of Innovative Technology (No. 12310) from Ministry of Education, Science, Sports and Culture, Japan. H.I. thanks the Nagase Foundation for financial support.",

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T2 - Formation of charge transfer conformer in Langmuir-Blodgett film

AU - Tkachenko, Nikolai V.

AU - Vehmanen, Visa

AU - Nikkanen, Juha Pekka

AU - Yamada, Hiroko

AU - Imahori, Hiroshi

AU - Fukuzumi, Shunichi

AU - Lemmetyinen, Helge

N1 - Funding Information: This work was supported by the Academy of Finland, the National Technology Agency of Finland and Grant-in-Aids (No. 11740352 to H.I., Nos. 11555230 and 11694079 to S.F.) and the Development of Innovative Technology (No. 12310) from Ministry of Education, Science, Sports and Culture, Japan. H.I. thanks the Nagase Foundation for financial support.

PY - 2002/12/10

Y1 - 2002/12/10

N2 - A porphyrin-fullerene covalently linked dyad is studied in solutions and Langmuir-Blodgett (LB) films. The dyad is characterized by a relatively long linker. In benzonitrile, it performs a relatively slow photo-induced electron transfer (ET), kET ≈ 5 × 108 s-1. Being incorporated in an LB film the dyad forms a compact conformer, which takes the smallest surface area. For this conformer the donor-acceptor separation is much shorter as compared with that in liquid phases and the molecule perform a fast photo-induced ET, kET ≈ 8 × 109 s-1. The LB films were studied using time-resolved measurements of fluorescence, absorption, and Maxwell displacement charge.

AB - A porphyrin-fullerene covalently linked dyad is studied in solutions and Langmuir-Blodgett (LB) films. The dyad is characterized by a relatively long linker. In benzonitrile, it performs a relatively slow photo-induced electron transfer (ET), kET ≈ 5 × 108 s-1. Being incorporated in an LB film the dyad forms a compact conformer, which takes the smallest surface area. For this conformer the donor-acceptor separation is much shorter as compared with that in liquid phases and the molecule perform a fast photo-induced ET, kET ≈ 8 × 109 s-1. The LB films were studied using time-resolved measurements of fluorescence, absorption, and Maxwell displacement charge.

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JF - Chemical Physics Letters

IS - 3-4

ER -

Porphyrin-fullerene dyad with a long linker: Formation of charge transfer conformer in Langmuir-Blodgett film

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