Electronic States of 2,3-Diamino-1,4-naphthoquinone and Its N-Alkylated Derivatives
- Inst. of Organic Chemistry and Biochemistry, Prague (Czech Republic)
- Univ. of Colorado, Boulder, CO (United States)
- Technische Univ. Berlin (Germany)
- National Renewable Energy Lab. (NREL), Golden, CO (United States)
- Inst. of Organic Chemistry and Biochemistry, Prague (Czech Republic); Univ. of Colorado, Boulder, CO (United States)
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-tetramethyl-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•+ and 1•– 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.
- Research Organization:
- National Renewable Energy Laboratory (NREL), Golden, CO (United States); Univ. of Colorado, Boulder, CO (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- AC36-08GO28308; SC0007004
- OSTI ID:
- 1595567
- Alternate ID(s):
- OSTI ID: 1688409
- Report Number(s):
- NREL/JA-5900-74492; TRN: US2100663
- Journal Information:
- Journal of Physical Chemistry. C, Vol. 124, Issue 1; ISSN 1932-7447
- Publisher:
- American Chemical SocietyCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
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