N-heterocyclic carbene (NHC) ligands annulated to free-base porphyrins: modulation of the electronic properties of the NHC upon protonation or metallation of the porphyrin |
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| Authors: | Lefebvre Jean-François Lo Mamadou Leclercq Dominique Richeter Sébastien |
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| Institution: | Institut Charles Gerhardt Montpellier ICGM, UMR 5253 CNRS-ENSCM-UM2-UM1, Université Montpellier 2, Place Eugène Bataillon, Batiment 17, CC1701, 34095 Montpellier Cedex 5, France. |
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| Abstract: | NHC ligands annulated to free-base porphyrins can be reversibly switched between electron-poor and electron-rich states upon protonation and deprotonation of the inner nitrogen atoms of the porphyrin. Metallation of the macrocycle with nickel(II) locks the peripheral NHC ligand in its electron-rich state. |
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