Electronic States of 2,3-Diamino-1,4-naphthoquinone and Its N-Alkylated Derivatives
JOURNAL OF PHYSICAL CHEMISTRY C, cilt.124, sa.1, ss.60-69, 2020 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 124 Sayı: 1
- Basım Tarihi: 2020
- Doi Numarası: 10.1021/acs.jpcc.9b08955
- Dergi Adı: JOURNAL OF PHYSICAL CHEMISTRY C
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Chemical Abstracts Core, Chimica, Compendex
- Sayfa Sayıları: ss.60-69
- Orta Doğu Teknik Üniversitesi Adresli: Hayır
Özet
Diaminoquinones with a captodatively stabilized biradicaloid structure are candidates for singlet fission, but few such compounds are known. We report the solution spectroscopy and photophysics of 1,2,2,3-tetramethy1-2,3-dihydro-1H-naphtho[2,3-d]-imidazole-4,9-dione (1): its steady-state and transient UV-visible absorption, linear dichroism in stretched poly(vinyl alcohol), and magnetic circular dichroism. We also describe the absorption spectra of the stable radical ions 1(center dot+) and 1(center dot-) and of two parent structures, 2,3-diamino-1,4-naphthoquinone (2) and 2,3-bis(methylamino)-1,4-naphthoquinone (3). The spectra are interpreted and electronic transitions are assigned by comparison with the results of density functional theory and MS-CASPT2 calculations.