Diversified Excited-State Relaxation Pathways of Donor-Linker-Acceptor Dyads Controlled by a Bent-to-Planar Motion of the Donor.

Sun, Guangchen; Wei, Yu-Chen; Zhang, Zhiyun; Lin, Jia-An; Liu, Zong-Ying; Chen, Wei; Su, Jianhua; Chou, Pi-Tai; Tian, He

Sun, Guangchen; Wei, Yu-Chen; Zhang, Zhiyun; Lin, Jia-An; Liu, Zong-Ying; Chen, Wei; Su, Jianhua; Chou, Pi-Tai; Tian, He.

Afiliación

Sun G; Key Laboratory for Advanced Materials and Feringa Nobel Prize Scientist Joint Research Center, Joint International Research Laboratory for Precision Chemistry and Molecular Engineering, Institute of Fine Chemicals, School of Chemistry & Molecular Engineering, East China University of Science &am
Wei YC; Department of Chemistry, National Taiwan University, Taipei, 10617, Taiwan R.O.C.
Zhang Z; Key Laboratory for Advanced Materials and Feringa Nobel Prize Scientist Joint Research Center, Joint International Research Laboratory for Precision Chemistry and Molecular Engineering, Institute of Fine Chemicals, School of Chemistry & Molecular Engineering, East China University of Science &am
Lin JA; Department of Chemistry, National Taiwan University, Taipei, 10617, Taiwan R.O.C.
Liu ZY; Department of Chemistry, National Taiwan University, Taipei, 10617, Taiwan R.O.C.
Chen W; Key Laboratory for Advanced Materials and Feringa Nobel Prize Scientist Joint Research Center, Joint International Research Laboratory for Precision Chemistry and Molecular Engineering, Institute of Fine Chemicals, School of Chemistry & Molecular Engineering, East China University of Science &am
Su J; Key Laboratory for Advanced Materials and Feringa Nobel Prize Scientist Joint Research Center, Joint International Research Laboratory for Precision Chemistry and Molecular Engineering, Institute of Fine Chemicals, School of Chemistry & Molecular Engineering, East China University of Science &am
Chou PT; Department of Chemistry, National Taiwan University, Taipei, 10617, Taiwan R.O.C.
Tian H; Key Laboratory for Advanced Materials and Feringa Nobel Prize Scientist Joint Research Center, Joint International Research Laboratory for Precision Chemistry and Molecular Engineering, Institute of Fine Chemicals, School of Chemistry & Molecular Engineering, East China University of Science &am

Angew Chem Int Ed Engl ; 59(42): 18611-18618, 2020 Oct 12.

Article en En | MEDLINE | ID: mdl-32648281

ABSTRACT

ABSTRACT

Herein, we introduce the cyclic 8π-electron (C8π) molecule N,N'-diaryl-dihydrodibenzo[a,c]phenazine (DPAC) as a dual-functional donor to establish a series of new donor-linker-acceptor (D-L-A) dyads DLA1-DLA5. The excited-state bent-to-planar dynamics of DPAC regulate the energy gap of the donor, while the acceptors A1-A5 are 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).

Palabras clave

donor-linker-acceptor dyads; electron transfer; energy transfer; fluorescence; photoinduced structural planarization

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