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The Synthesis and Characterisation of a Free‐Base Porphyrin–Perylene Dyad that Exhibits Electronic Coupling in Both the Ground and Excited States
Author(s) -
Mathew Simon,
Johnston Martin R.
Publication year - 2008
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.200801779
Subject(s) - perylene , porphyrin , free base , excited state , photochemistry , quantum yield , photoinduced electron transfer , ground state , diimide , chemistry , spectroscopy , covalent bond , coupling (piping) , fluorescence , electron transfer , materials science , atomic physics , molecule , organic chemistry , physics , salt (chemistry) , quantum mechanics , metallurgy
A covalent dyad composed of a free‐base porphyrin and a perylene diimide ( 1 ) was synthesised and characterised by NMR, HRMS, UV/Vis and fluorometric methods. UV/Vis spectrophotometric analysis indicated a moderate coupling between the components in the ground state. Fluorescence spectroscopy revealed that the emissive properties of the dyad showed that the quantum yield of emission from the porphyrin Soret band increased dramatically and could not be rationalised by a straightforward photoinduced energy (and/or electron) transfer, but rather a coupling of excited states.