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Photoresponsive Frameworks: Energy Transfer in the Spotlight

Abstract

In this paper, spiropyran-containing metal- and covalent-organic frameworks (MOFs and COFs, respectively) are probed as platforms for fostering photochromic behavior in solid-state materials while simultaneously promoting directional energy transfer (ET). In particular, Förster resonance energy transfer (FRET) between spiropyran and porphyrin derivatives integrated as linkers in the framework matrix is discussed. The photochromic spiropyran derivatives allows for control over material optoelectronic properties through alternation of excitation wavelengths. Photoinduced changes in the material electronic profile have also been probed through conductivity measurements. Time-resolved photoluminescence studies were employed to evaluate the effect of photochromic linkers on material photophysics. Furthermore, “forward” and “reverse” FRET processes occurring between two distinct chromophores were modeled, and the Förster critical radii and ET rates were estimated to support the experimentally observed changes in material photoluminescence.

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Supplementary files

Article information


Submitted
08 Feb 2021
Accepted
13 Apr 2021
First published
13 Apr 2021

Faraday Discuss., 2021, Accepted Manuscript
Article type
Paper

Photoresponsive Frameworks: Energy Transfer in the Spotlight

C. R. Martin, K. C. Park, R. E. Corkill, P. Kittikhunnatham, G. A. Leith, A. Mathur, S. L. Abiodun, A. B. Greytak and N. Shustova, Faraday Discuss., 2021, Accepted Manuscript , DOI: 10.1039/D1FD00013F

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