Mechanism of Ultrafast Triplet Exciton Formation in Single Cocrystals of π-Stacked Electron Donors and Acceptors

Autor:	Malik L. Williams, Itai Schlesinger, Robert M. Jacobberger, Michael R. Wasielewski
Rok vydání:	2022
Předmět:	Pyrenes Colloid and Surface Chemistry Electron Spin Resonance Spectroscopy Electrons General Chemistry Naphthalenes Perylene Biochemistry Catalysis
Zdroj:	Journal of the American Chemical Society. 144:18607-18618
ISSN:	1520-5126 0002-7863
DOI:	10.1021/jacs.2c08584
Popis:	Ultrafast triplet formation in donor-acceptor (D-A) systems typically occurs by spin-orbit charge-transfer intersystem crossing (SOCT-ISC), which requires a significant orbital angular momentum change and is thus usually observed when the adjacent π systems of D and A are orthogonal; however, the results presented here show that subnanosecond triplet formation occurs in a series of D-A cocrystals that form one-dimensional cofacial π stacks. Using ultrafast transient absorption microscopy, photoexcitation of D-A single cocrystals, where D is coronene (Cor) or pyrene (Pyr) and A is
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::db397a78abd576e3558cd4a619e1f75f https://doi.org/10.1021/jacs.2c08584 Zobrazit plný text záznamu