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Ground State versus Excited State: Discrepancy in Electronic Communication in a Series of meso – meso Two‐Atom‐Bridged Diporphyrins
Author(s) -
Zieleniewska Anna,
Harper Shan R.,
Arnold Dennis P.,
Guldi Dirk M.
Publication year - 2018
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201705938
Subject(s) - excited state , ground state , atom (system on chip) , chemistry , absorption spectroscopy , nanosecond , ultrafast laser spectroscopy , spectroscopy , photochemistry , atomic physics , physics , optics , laser , quantum mechanics , computer science , embedded system
The focal point of this work is the photophysical characterization of three meso – meso two‐atom‐bridged diporphyrins. Detailed investigations by means of cyclic voltammetry, absorption, fluorescence, and femto‐/nanosecond transient absorption spectroscopy revealed the discrepancy in electronic communication in a series of meso–meso two‐atom‐bridged porphyrins in the ground state and in the excited state. In the ground state, the azo bridge facilitates the strongest electronic communication between the two porphyrins. In the excited state, however, the ethene bridge induces the strongest coupling, followed by the imine and azo bridges.