Diethoxycarbonyl-BODIPYs as heavy-atom-free photosensitizers for holographic recording in cellulose acetate photopolymer

Authors

Aimee Sheehan, Technological University DublinFollow
Tatsiana Mikulchyk, Technological University DublinFollow
Catherine S.P. De Castro, King Abdullah University of Science and Technology
Safakath Karuthedath, King Abdullah University of Science and Technology
Wejdan Althobaiti, King Abdullah University of Science and Technology
Metodej Dvoracek, Technological University Dublin
Sabad-e Gul, Technological University DublinFollow
Hugh Byrne, Technological University DublinFollow
Frédéric Laquai, King Abdullah University of Science and Technology
Izabela Naydenova, Technological University DublinFollow
Mikhail Filatov, Technological University DublinFollow

Document Type

Article

Disciplines

Optics, 1.4 CHEMICAL SCIENCES

Publication Details

From Journal of Materials Chemistry C:

https://doi.org/10.1039/d3tc02640j

Abstract

A series of new heavy-atom-free photosensitizers based on 2,6-diethoxycarbonyl-BODIPY scaffold was designed and applied for holographic recording in a photopolymerizable material. Photoinduced electron transfer between the BODIPY and meso-aryl subunits, followed by the formation of BODIPY triplet excited states via spin-orbit charge transfer intersystem crossing (SOCT-ISC) was studied by steady-state and ultrafast pump-probe transient optical spectroscopy. Highly efficient photosensitization was observed for dyads bearing pyrene and anthracene substituents, which exhibited singlet oxygen generation quantum yields () of up to 94%. Charge transfer and SOCT-ISC were observed in non-polar solvent (toluene) due to the increased electron accepting ability of the diethoxycarbonyl-BODIPY. In combination with N-phenylglycin (NPG) as a co-initiator, new BODIPYs initiate a free-radical polymerization of acrylamide monomers under 532 nm irradiation that was used for creation of volume phase transmission gratings in a photopolymerizable material based on cellulose acetate and polyethylene glycol (CA-PEG). As a result of holographic recording, diffractive structures with diffraction efficiency of up to 56% were obtained for CA-PEG layers sensitized with BODIPY-pyrene dyad as compared to a reference heavy-atom-containing diiodo-BODIPY dye (27%). The developed materials showed refractive index modulation of up to 2.3 × 10-3, which demonstrate the potential of diethoxycarbonyl-BODIPYs photosensitizers for holographic recording applications.

DOI

https://doi.org/10.1039/d3tc02640j

Recommended Citation

Sheehan, Aimee; Mikulchyk, Tatsiana; De Castro, Catherine S.P.; Karuthedath, Safakath; Althobaiti, Wejdan; Dvoracek, Metodej; Gul, Sabad-e; Byrne, Hugh; Laquai, Frédéric; Naydenova, Izabela; and Filatov, Mikhail, "Diethoxycarbonyl-BODIPYs as heavy-atom-free photosensitizers for holographic recording in cellulose acetate photopolymer" (2023). Articles. 143.
https://arrow.tudublin.ie/scschcpsart/143

Funder

Science Foundation Ireland

Creative Commons License

This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License