Excitation Localization/Delocalization Isomerism in a Strongly Coupled Covalent Dimer of 1,3-Diphenylisobenzofuran
JOURNAL OF PHYSICAL CHEMISTRY A, cilt.120, sa.20, ss.3473-3483, 2016 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 120 Sayı: 20
- Basım Tarihi: 2016
- Doi Numarası: 10.1021/acs.jpca.6b00826
- Dergi Adı: JOURNAL OF PHYSICAL CHEMISTRY A
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
- Sayfa Sayıları: ss.3473-3483
- Orta Doğu Teknik Üniversitesi Adresli: Evet
Özet
Two isomers of both the lowest excited singlet (S-1) and triplet (T-1) states of the directly para, para'-connected covalent dimer of the singlet-fission chromophore 1,3-diphenylisobenzofuran have been observed. In one isomer, excitation is delocalized over both halves of the dimer, and in the other, it is localized on one or the other half. For a covalent dimer in solution, such "excitation isomerism" is extremely rare. The vibrationally relaxed isomers do not interconvert, and their photophysical properties, including singlet fission, differ significantly.