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Donor–Acceptor Heterojunction Configurations Based on DNA–Multichromophore Arrays
Author(s) -
Nakamura Mitsunobu,
Tsuto Koji,
Jomura Ayumi,
Takada Tadao,
Yamana Kazushige
Publication year - 2015
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201501955
Subject(s) - photocurrent , acceptor , heterojunction , electrode , materials science , thymine , dna , photochemistry , chemistry , optoelectronics , biochemistry , physics , condensed matter physics
Multichromophore arrays of bis(2‐thienyl)diketopyrrolopyrrole (DPP) and naphthalenediimide (NDI) with two Zn II ‐cyclens were constructed using thymidine DNA as a scaffold through the binding of the Zn II ‐cyclens with thymine bases. We demonstrate photocurrent generation in a donor–acceptor heterojunction configuration consisting of the DPP (donor) and NDI (acceptor) arrays co‐immobilized on an Au electrode. The co‐immobilized electrode exhibited good photocurrent responses because of the efficient charge separation between the DPP and NDI arrays. In contrast, an immobilized electrode consisting of randomly assembled DPP‐NDI arrays generated no photocurrent response because DPP formed ground‐state charge‐transfer complexes with NDI in the randomly assembled arrays. Therefore, our approach to generate donor–acceptor heterojunctions based on DNA–multichromophore arrays is a useful method to efficiently generate photocurrent.