𝔖 Bobbio Scriptorium
✦   LIBER   ✦

N heteroatomic effect on the photophysics of a polyphenyl system: 2,2′-dipyridylamine

✍ Scribed by P. Jana; T. Ganguly; S.K. Sarkar; A. Mitra; P.K. Mallick

Publisher
Elsevier Science
Year
1996
Tongue
English
Weight
560 KB
Volume
94
Category
Article
ISSN
1010-6030

No coin nor oath required. For personal study only.

✦ Synopsis

A detailed investigation of the absorption and emission characteristics of 2,2'-dipyridylamine (DPyA) and diphenylamine (DPA) has been carried out in different polar and non-polar solvents at room temperature (300 K) and at 77 K. A dramatic change in both the characteristics has been observed in DPyA in comparison with DPA. Measured fluorescence and phosphorescence lifetimes and critical study of the absorption and emission spectral data suggest that DPyA is more planar than DPA and its lowest-energy singlet state is of IL a type containing a little charge transfer character. Evidence of the presence of a ~n'tr* state has been found in DPyA on protonation in the binary mixture of water and sulphuric acid at room temperature.

📜 SIMILAR VOLUMES

Syntheses and photophysical properties o
Syntheses and photophysical properties of rigid-rod conjugated compounds based on N-7-azaindole and 2,2′-dipyridylamine
✍ Youngjin Kang; Suning Wang 📂 Article 📅 2002 🏛 Elsevier Science 🌐 French ⚖ 102 KB

Rigid-rod conjugated compounds based on N-7-azaindole and 2,2%-dipyridylamine functional groups have been synthesized as potential compounds for molecular electronic devices via Pd-mediated Sonogashira couplings. Their photoluminescent properties have been investigated.

Solvation effect in thermal decompositio
Solvation effect in thermal decomposition of 2,2′-azoisobutyronitrile on the N,N-dimethylformamide/acrylonitrile system
✍ J. Szafko; W. Feist; B. Pabin-Szafko 📂 Article 📅 1996 🏛 John Wiley and Sons 🌐 English ⚖ 528 KB

The thermal decomposition rate constant of AIBN ( k d ) in N,N-dimethylformamide (DMF)/ acrylonitrile (AN) mixtures of various compositions at 60°C is studied. The k d value is (6.45 +. 0.3) X min-' for pure acrylonitrile. The k d values of DMF/AN mixtures were found to be dependent on the mixture