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On the electronic states of macrocycles of the extended porphyrin family and their coordination compounds |
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| Authors: | Mario Bossa Elena Cervone Carmine Garzillo Andrea Peluso |
| Affiliation: | a Dipartimento di Chimica, Università ‘La Sapienza’ di Roma, piazza A. Moro 5, 00185, Rome, Italy b Cattedra di Chimica Teorica, Università Federico II, via Mezzocannone 4, I-80134, Napoli, Italy c Dipartimento di Chimica, Università di Salerno, I-84081, Baronissi, Salerno, Italy |
| Abstract: | The electronic absorption spectra of Ni, Zn and Mg hemiporphyrazine derivatives are presented and discussed together with theoretical results obtained by INDO/S computations. The absorption spectra of all the metal derivatives show marked red shifts of the lowest energy absorption bands with respect to those of the metal free hemiporphyrazine. The possible explanation that in metal derivatives low lying excited states with a fully conjugated π electron system are present is supported by theoretical computations. |
| Keywords: | INDO/S Macrocycle Porphyrin |
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