Steady-state and time-resolved fluorescence spectroscopy, as well as the S,, + St absorption spectra of three anthryl derivatives of dimethylaniline, I-III, reveal the existence of two emitting states in all these compounds. The primary locally excited (LE) state of the anthracenc moiety relaxes in
On the kinetics of formation of an excited charge-transfer state in 4-(9-anthryl)N,N-dimethylaniline
โ Scribed by Aleksander Siemiarczuk
- Publisher
- Elsevier Science
- Year
- 1984
- Tongue
- English
- Weight
- 262 KB
- Volume
- 110
- Category
- Article
- ISSN
- 0009-2614
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โฆ Synopsis
The kinetics of formation of an excited charge-transfer (CT) state in ?-(9-antllrvl)_N,h'-di~iet~~~laniline have been studied by means of steady-state and nanosecond time-resolved fh~orcsctnce. It is concluded rhat the escited CT state is formed irreversibly at room temperature in ethyl acetate on a timescale shorter than 54 picoscconds.
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The formation of an intramolecular excited complex stale in 4-(9-anthrylmeLhyl)-N.N-dimeLhylaniline was investigated at h@ p-w\_ A change in the kinetics from thermodyoamic conlrol to kinetic control VIZ observed m ethyl elhcr solvent In loluene tie pr-is kinclically con~olled over the whole pressur
It has been conf'Lnned in the case of aromatic hydrocarbon,DMA(N,N-dimethytaniline) systems that the ion radical formation occurs mainly from the non-relaxed CT (charge transfer) system before the reLaxed exciplex state is formed. Absolute quantum yields of ion radical formation in acetonitrile have
Tie-resolved emission spectra of 7-amino-3-methyl-1,4-benzoxazine-Z-one (XhlBO) are plotted in the time range 0 < r < 300 ps for various solvents. The fluorescent state of AhIBO has intramolecular chx8.e transfer (ICT) character\_ A method for detailed analysis of the excited molecule-solvent time-e
The rate of formation of the intramolecular charge-transfer state of 4-(N,N-dimethylamino)benzonitrile (DMABN) has been determined in supercritical CFsH using a fast single-photon counting technique. The rate constant increases rapidly with increasing CFIH density, indicating the importance of the p