Charge transfer mediated triplet excited state formation in donor-acceptor-donor BODIPY: Application for recording of holographic structures in photopolymerizable glass
De Castro, Catherine S. P.
Buglak, Andrey A.
Filatov, Mikhail A.
KAUST DepartmentKing Abdullah University of Science and Technology (KAUST), KAUST Solar Center (KSC), Physical Sciences and Engineering Division (PSE), Material Science and Engineering Program (MSE), Thuwal, 23955-6900, Kingdom of Saudi Arabia
Physical Science and Engineering (PSE) Division
Material Science and Engineering Program
KAUST Solar Center (KSC)
Permanent link to this recordhttp://hdl.handle.net/10754/679984
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AbstractDonor–acceptor–donor BODIPY triads bearing anthracene or pyrene as electron donating subunits were prepared through a stepwise synthesis. Photoinduced electron transfer and formation of long-lived triplet excited states via spin–orbit charge transfer intersystem crossing (SOCT-ISC) was studied by steady-state and ultrafast pump-probe spectroscopy and further supported by DFT computations. New BODIPYs were found to form triplet states and sensitize singlet oxygen in both polar and non-polar solvents which is unusual for photosensitizers operating via SOCT-ISC. BODIPY-anthracene triad (ABA) was used as a photosensitizer component in a photopolymerizable glass that was prepared by a four-step sol–gel process. ABA in combination with N-phenylglycin (NPG) showed the ability to initiate a free-radical polymerization of methacrylate monomers under 532 nm irradiation thus allowing for holographic recording of diffractive structures. High diffraction efficiency (up to 87%) obtained for ABA-NPG containing glass as compared to a reference diiodo-BODIPY (I2BDP) demonstrates for the first time that heavy-atom-free SOCT-ISC photosensitizers can efficiently operate in the solid state.
CitationMikulchyk, T., Karuthedath, S., De Castro, C. S. P., Buglak, A. A., Sheehan, A., Wieder, A., Laquai, F., Naydenova, I., & Filatov, M. A. (2022). Charge transfer mediated triplet excited state formation in donor–acceptor–donor BODIPY: Application for recording of holographic structures in photopolymerizable glass. Journal of Materials Chemistry C. https://doi.org/10.1039/d2tc02263j
SponsorsM. A. F. acknowledges TU Dublin Research Scholarship programme for the financial support of this work, Dr Alla Lemeune (ENS de Lyon) for HRMS measurements and Fred Odunjo (CREST, TU Dublin) for EDX measurements. A. A. B. acknowledges the Strategic Academic Leadership Programme “Priority 2030” of the Kazan Federal University. This publication is based on work supported by the KAUST Office of Sponsored Research (OSR) under award no. OSR-CRG2018-3746 and OSR-CRG2019-4025. C. S. P. D. C. would like to acknowledge Luis Gutiérrez-Arzaluz for help getting started with the modified microscope used for TRPL measurements.
PublisherRoyal Society of Chemistry (RSC)
JournalJOURNAL OF MATERIALS CHEMISTRY C
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