Construction and photoelectric property of DNA templated dye aggregates

2015 Fiscal Year Final Research Report

• Project/Area Number: 25410099
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Functional solid state chemistry
• Research Institution: University of Hyogo
• Principal Investigator: Nakamura Mitsunobu 兵庫県立大学, 工学(系)研究科(研究院), 准教授 (50285342)
• Co-Investigator(Renkei-kenkyūsha): YAMANA Kazushige 兵庫県立大学, 大学院工学研究科, 教授 (70192408) ; TAKADA Tadao 兵庫県立大学, 大学院工学研究科, 准教授 (60511699)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: 色素組織体 / 自己組織化 / ＤＮＡ / 光電変換 / ナフタレンジイミド / ジケトピロロピロール

Outline of Final Research Achievements

Multichromophore arrays of bis(2-thienyl)diketopyrrolopyrrole (DPP) and naphthalenediimide (NDI) with two ZnII-cyclens were constructed using thymidine DNAs as a scaffold via the binding of the ZnII-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/accepter heterojunctions based on DNA-multichromophore arrays is a useful method to efficiently generate photocurrent.

Free Research Field

光化学、核酸化学