文献类型：期刊文献

英文题名：Diversified Excited-State Relaxation Pathways of Donor-Linker-Acceptor Dyads Controlled by a Bent-to-Planar Motion of the Donor

作者：Sun, Guangchen[1,2];Wei, Yu-Chen[3];Zhang, Zhiyun[1,2];Lin, Jia-An[3];Liu, Zong-Ying[3];Chen, Wei[1,2];Su, Jianhua[1,2];Chou, Pi-Tai[3];Tian, He[1,2]

机构：[1]East China Univ Sci & Technol, Sch Chem & Mol Engn, Key Lab Adv Mat, 130 Meilong Rd, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Sch Chem & Mol Engn, Feringa Nobel Prize Scientist Joint Res Ctr, Joint Int Res Lab Precis Chem & Mol Engn,Inst Fin, 130 Meilong Rd, Shanghai 200237, Peoples R China;[3]Natl Taiwan Univ, Dept Chem, Taipei 10617, Taiwan

年份：2020

卷号：59

期号：42

起止页码：18611

外文期刊名：ANGEWANDTE CHEMIE-INTERNATIONAL EDITION

收录：;EI(收录号：20203409078112);WOS:【SCI-EXPANDED(收录号:WOS:000559998200001)】；

基金：We thank the financial support from the NSFC/China (21788102, 21905090, 21790361, 91859205), Shanghai Municipal Science and Technology Major Project (Grant No. 2018SHZDZX03), the Programme of Introducing Talents of Discipline to Universities (B16017), Shanghai Science and Technology Committee (17520750100), the Program for Professor of Special Appointment (Eastern Scholar) at Shanghai Institutions of Higher Learning, and Natural Science Foundation of Shanghai (19ZR1412200). P.-T.C. thanks for the financial support by Ministry of Science and Technology (MOST), featured areas research program within the framework of the Higher Education Sprout Project administrated by Ministry of Education (MOE) of Taiwan.

语种：英文

外文关键词：donor-linker-acceptor dyads; electron transfer; energy transfer; fluorescence; photoinduced structural planarization

摘要：Herein, we introduce the cyclic 8 pi-electron (C8 pi) moleculeN,N '-diaryl-dihydrodibenzo[a,c]phenazine (DPAC) as a dual-functional donor to establish a series of new donor-linker-acceptor (D-L-A) dyadsDLA1-DLA5. The excited-state bent-to-planar dynamics ofDPACregulate the energy gap of the donor, while the acceptorsA1-A5are endowed with different energy gaps and HOMO/LUMO levels. As a result, the rate and efficiency of the excited-state electron transfer vs. energy transfer can be finely harnessed, which is verified via steady-state spectroscopy and time-resolved emission measurements. This comprehensive approach demonstrates, for the first time, the manifold of excited-state properties governed by bifunctional donor-based D-L-A dyads, including bent-to-planar, photoinduced electron transfer (PET) from excited donor to acceptor (oxidative-PET), fluorescence resonance energy transfer (FRET), bent-to-planar followed by electron transfer (PFET), and PET from donor to excited acceptor (reductive-PET).