Zoekopdracht:
faculteit: "FNWI" en publicatiejaar: "1991"
| Auteurs | A.M. Brouwer, R.D. Mout, P.H. Maassen van den Brink, H.J. van Ramesdonk, J.W. Verhoeven, S.A. Jonker | | Titel | Charge separation in the excited state of electron donor-acceptor compounds containing the piperazine moiety |
| Tijdschrift | Chemical physics letters |
| Jaargang | 180 |
| Jaar | 1991 |
| Nummer | 6 |
| Pagina's | 556-562 |
| ISSN | 00092614 |
| Faculteit | Faculteit der Natuurwetenschappen, Wiskunde en Informatica |
| Instituut/afd. | FNWI: Van 't Hoff Institute for Molecular Sciences (HIMS) |
| Trefwoorden | photochemistry; piperazine; donor-acceptor systems; electron transfer; absorption spectra |
| Basisclassificatie | 35.14 ; 35.16 ; 35.51 |
| Samenvatting | Three bridged electron donor—acceptor systems are investigated containing a 4-cyano-1-ethenylnaphthalene electron-acceptor and piperidine (compound 1), phenylpiperazine (2) and 4-methoxyphenylpiperazine (3) electron-donating groups. In the intramolecular charge-transfer states of 1 and 2, the extent of charge separation is similar, but in compound 3 the positive charge is shifted towards the more powerful arylamine donor site, which results in a significantly greater dipole moment. Optical absorption spectra of model radical cations demonstrate that the predominant charge localization on the trialkyl nitrogen in 2 and on the aryl nitrogen in 3 are a consequence of the bistable nature of the piperazine donors. |
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