Biomimetic Donor–Acceptor Motifs in Conjugated Polymers for Promoting Exciton Splitting and Charge Separation. (14th June 2018)

• Record Type: Journal Article
• Authors: Ou, Honghui; Chen, Xinru; Lin, Lihua; Fang, Yuanxing; Wang, Xinchen
• Is Part Of: Angewandte Chemie. Volume 130:Number 28(2018)
• Page Start: 8865
• Page End: 8869
• Publication Date: 2018-06-14
• Subjects: Donor-Akzeptor-Systeme -- Kohlenstoffnitrid -- Ladungstrennung -- Photokatalyse -- Polymere; Chemistry -- Periodicals; 540
• DOI: 10.1002/ange.201803863
• Languages: English
• ISSNs: 0044-8249

Abstract

Abstract: Natural photosynthesis serves as a model for energy and chemical conversions, and motivates the search of artificial systems that mimic nature′s energy‐ and electron‐transfer chains. However, bioinspired systems often suffer from the partial or even large loss of the charge separation state, and show moderate activity owing to the fundamentally different features of the multiple compounds. Herein, a selenium and cyanamide‐functionalized heptazine‐based melon (DA‐HM) is designed as a unique bioinspired donor–acceptor (D‐A) light harvester. The combination of the photosystem and electron shuttle in a single species, with both n‐ and p ‐type conductivities, and extended spectral absorption, endows DA‐HM with a high efficiency in the transfer and separation of photoexcited charge carriers, resulting in photochemical activity. This work presents a unique conjugated polymeric system that shows great potential for solar‐to‐chemical conversion by artificial photosynthesis. Abstract : Biomimetische Donor‐Akzeptor‐Motive wurden in Kohlenstoffnitrid‐Halbleiter eingeführt, um Exziton‐Dissoziation und Ladungstrennung zu fördern. Das vorgestellte einfache biomimetische Polymersystem hat Potenzial für die künstliche Photosynthese zur Umwandlung von Sonnenenergie in chemische Energie. Es bietet sich als strukturelle Plattform für photochemische Systeme mit biologisch inspirierten Funktionen an.