The absorption and emission of 4-(N,N-dimethylarnino)benzonitrile (DMABN) in a-cyclodextrine (a-CD) cavities is reported. The twisted intramolecular charge transfer emission is enhanced on complexation with a-CD. This is attributed to the reduced polarity of the CD environment.
Dynamical study of twisted intramolecular charge transfer in p-dimethylaminobenzonitrile solutions
โ Scribed by F. Heisel; J.A. Miehe
- Publisher
- Elsevier Science
- Year
- 1983
- Tongue
- English
- Weight
- 476 KB
- Volume
- 100
- Category
- Article
- ISSN
- 0009-2614
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โฆ Synopsis
To characterize the intramolecular charge-transfer process of DMABN, pica-and nanosecond measurements in different polar solutions and at various temperatures were undertaken. Evidence of (i) timedependent interconversion ntesdescribithe formation of the charg%ransfer state and (ii) fluorescence solvachromic effects is presented_
๐ SIMILAR VOLUMES
Dual fluorescence of 4dimethylaminobenzonitrile (DMABN) has been used to study the behavior of DMABN in a-cyclodextrine (a-CD). Results obtained indicate that DMABN in an aqueous a-CD solution probably exists in three different environmental conditions; polar, slightly polar and hydrophobic. DMABN s
The twisted intramolecular charge transfer phenomenon in p-(N,N-dimethylamino)benzonitrile has been studied using Austin model 1 (AMI) semi-empirical calculations. A detailed picture of the twisting process is obtained by calculation of the ground and excited state profiles as a function of twist an
The amount offree volume present in a polymer matrix represents a driving force toward twisted intramolecular charge transfer (TICT) emission of pdimethylaminobenzonitrile (DMABN) and related compounds. The intensity of the TICT band for these compounds in PVC (poly(viny1 chloride), PVA (poly(viny1