Investigation of electronic energy transfer in a BODIPY-decorated calix[4] arene
Year: 2019
Authors: Tosi I., Bardi B., Ambrosetti M., Domenichini E., Iagatti A., Baldini L., Cappelli C., Di Donato M., Sansone F., Sissa C., Terenziani F.
Autors Affiliation: Univ Parma, Dipartimento Sci Chim Vita & Sostenibilita Ambien, Parco Area Sci 17-A, I-43124 Parma, Italy; LENS, Via N Carrara 11, I-50019 Sesto Fiorentino, FI, Italy; Univ Strasbourg, IPCMS, 23 Rue Loess BP 43, F-67034 Strasbourg 2, France; Scuola Normale Super Pisa, Piazza Cavalieri 7, I-56126 Pisa, Italy; SNS, INSTM Res Unit, Piazza Cavalieri 7, I-56126 Pisa, Italy.
Abstract: The photophysics of a donor-acceptor system in which efficient electronic energy transfer occurs is analyzed and discussed by the combined use of steady-state and time-resolved spectroscopy and DFT/TD-DFT computations. The donor and acceptor units belong to the class of BODIPY chromophores, and are conveniently linked through a calixarene scaffold, which allows the control of the mutual orientation and distance between chromophores. Our results highlight that the energy transfer process occurs with multiexponential dynamics strongly influenced by the solvent. Although the conformation adopted by the system is very similar in all the analyzed solvents, highly polar media favour fast and efficient energy transfer. On the contrary, in non-polar media, the concomitant occurrence of backward energy transfer causes a significant slowdown of the process. The inverse of the energy transfer rates calculated at the TDDFT level are in very good agreement with the experimental kinetics measured with transient absorption spectroscopy.
Journal/Review: DYES AND PIGMENTS
Volume: 171 Pages from: 107652-1 to: 107652-11
More Information: The authors gratefully acknowledge financial support from the Italian Ministero dell’Istruzione, dell’Universita e della Ricerca (MIUR): program FIRB Futuro in Ricerca 2010 grant RBFR10Y5VW. B.B., C.S., F.T., L.B., F.S. acknowledge financial support from MIUR through the grant Dipartimenti di Eccellenza (DM 11/05/2017 n. 262). CC gratefully acknowledges the support of H2020-MSCA-ITN-2017 European Training Network Computational Spectroscopy In Natural sciences and Engineering (COSINE), grant number 765739. The Centro Interfacolta Misure (CIM) of the University of Parma is acknowledged for use of their NMR and mass spectrometers.KeyWords: Electronic energy transfer; BODIPY chromophores; Transient spectroscopy; CalixarenesDOI: 10.1016/j.dyepig.2019.107652Citations: 9data from “WEB OF SCIENCE” (of Thomson Reuters) are update at: 2024-11-17References taken from IsiWeb of Knowledge: (subscribers only)