Synthesis and Photophysics of Phenylene Based Triplet Donor–Acceptor Dyads: ortho vs. para Positional Effect on Intramolecular Triplet Energy Transfer
- Chicago State Univ., IL (United States); Illinois Institute of Technology, Chicago, IL (United States)
- Illinois Institute of Technology, Chicago, IL (United States)
- Basque Research and Technology Alliance (BRTA) (Spain). Center for Cooperative Research in Biosciences (CIC bioGUNE)
- Stockton University, Galloway, NJ (United States)
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Basque Research and Technology Alliance (BRTA) (Spain). Center for Cooperative Research in Biosciences (CIC bioGUNE); Basque Foundation for Science, Bilbao (Spain). IKERBASQUE
Two phenylene based geometrical/isomeric triplet ortho- and para–dyads (o–3 and p–3, respectively) were synthesized and fully characterized using advanced photophysical tools and computations. In dyad o–3, the through-space donor-acceptor interactions led to simultaneous triplet energy transfer and charge transfer with identical kinetics. On the other hand, in the dyad p–3, it was found that the phenylene spacer favors a fast triplet energy delocalization over the charge transfer process. Furthermore, analysis of the results from the present investigation indicates that the deactivation of the photo-excited species (o–3)* occurs through both the intrinsic channel viz. S0←S1 and charge recombination. In the case of dyad p–3, the results indicate that the primary deactivation pathway is self-quenching or triplet-triplet annihilation involving the acceptor unit(s).
- Research Organization:
- Argonne National Laboratory (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC); Illinois Institute of Technology; Agencia Estatal de Investigacion (AEI); National Science Foundation (NSF)
- Grant/Contract Number:
- AC02-06CH11357
- OSTI ID:
- 1854360
- Journal Information:
- Journal of Photochemistry and Photobiology, Vol. 10; ISSN 2666-4690
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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