We present the synthesis and spectroscopic characterization of a twisted push‐pull biphenyl molecule undergoing photoinduced electron transfer. Steady‐state and transient absorption spectra suggest, in this rigid molecular structure, a subtle interplay between locally‐excited and charge‐transfer states, whose equilibrium and dynamics is only driven by solvation. A theoretical model is presented for the solvation dynamics and, with the support of quantum chemical calculations, we demonstrate the existence of two sets of states, having either local or charge‐transfer character, that only “communicate” thanks to solvation, which is the sole driving force for the charge‐separation process.

Addressing charge‐transfer and locally‐excited states in a twisted biphenyl push‐pull chromophore / Campioli, Elisa; Sanyal, Somananda; Marcelli, Agnese; Di Donato, Mariangela; Blanchard-Desce, Mireille; Mongin, Olivier; Painelli, Anna; Terenziani, Francesca. - In: CHEMPHYSCHEM. - ISSN 1439-4235. - 20:21(2019), pp. 2860-2873. [10.1002/cphc.201900703]

Addressing charge‐transfer and locally‐excited states in a twisted biphenyl push‐pull chromophore

Campioli, Elisa;Sanyal, Somananda;Painelli, Anna;Terenziani, Francesca
2019-01-01

Abstract

We present the synthesis and spectroscopic characterization of a twisted push‐pull biphenyl molecule undergoing photoinduced electron transfer. Steady‐state and transient absorption spectra suggest, in this rigid molecular structure, a subtle interplay between locally‐excited and charge‐transfer states, whose equilibrium and dynamics is only driven by solvation. A theoretical model is presented for the solvation dynamics and, with the support of quantum chemical calculations, we demonstrate the existence of two sets of states, having either local or charge‐transfer character, that only “communicate” thanks to solvation, which is the sole driving force for the charge‐separation process.
2019
Addressing charge‐transfer and locally‐excited states in a twisted biphenyl push‐pull chromophore / Campioli, Elisa; Sanyal, Somananda; Marcelli, Agnese; Di Donato, Mariangela; Blanchard-Desce, Mireille; Mongin, Olivier; Painelli, Anna; Terenziani, Francesca. - In: CHEMPHYSCHEM. - ISSN 1439-4235. - 20:21(2019), pp. 2860-2873. [10.1002/cphc.201900703]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11381/2862318
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