TY - JOUR

T1 - Charge transfer mediated triplet excited state formation in donor-acceptor-donor BODIPY

T2 - Application for recording of holographic structures in photopolymerizable glass

AU - Mikulchyk, Tatsiana

AU - Karuthedath, Safakath

AU - De Castro, Catherine S.P.

AU - Buglak, Andrey A.

AU - Sheehan, Aimee

AU - Wieder, Aaron

AU - Laquai, Frédéric

AU - Naydenova, Izabela

AU - Filatov, Mikhail A.

N1 - Publisher Copyright: © 2022 The Royal Society of Chemistry.

PY - 2022/7/18

Y1 - 2022/7/18

N2 - Donor-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.

AB - Donor-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.

UR - http://www.scopus.com/inward/record.url?scp=85135308226&partnerID=8YFLogxK

UR - https://www.mendeley.com/catalogue/b5a4f624-acf2-31b5-b285-b37286768599/

U2 - 10.1039/d2tc02263j

DO - 10.1039/d2tc02263j

M3 - Article

AN - SCOPUS:85135308226

VL - 10

SP - 11588

EP - 11597

JO - Journal of Materials Chemistry C

JF - Journal of Materials Chemistry C

SN - 2050-7526

IS - 32

ER -