• Keine Ergebnisse gefunden

Emission Anisotropy of p-Cyano-N,N-Dialkylanilines in Poly(vinyl alcohol) Film

N/A
N/A
Protected

Academic year: 2022

Aktie "Emission Anisotropy of p-Cyano-N,N-Dialkylanilines in Poly(vinyl alcohol) Film"

Copied!
1
0
0

Wird geladen.... (Jetzt Volltext ansehen)

Volltext

(1)

Emission Anisotropy of p-Cyano-N,N-Dialkylanilines in Poly(vinyl alcohol) Film

A. Kawski, P. Bojarski, and B. Kukli´nski

Institute of Experimental Physics, University of Gda´nsk, ul. Wita Stwosza 57, PL-80-952 Gda´nsk, Poland

Reprint requests to Prof. A. K., ul. Gen. W. Sikorskiego 11, PL 84-200, Wejherowo, Poland Z. Naturforsch. 58a, 194 – 196 (2003); received January 30, 2003

The emission anisotropy spectra, r,(λ)of p-cyano-dimethylaniline (CDMA) and p-cyano-diethyl- aniline (CDEA) in PVA films are temperature dependent. At 296 K a characteristic dependence of r,(λ)on the absorption (A), short emission (SE) and long emission (LE) band, responsible for the to- tal emission of fluorescence and phosphorescence is observed. On temperature enhancement to 355 K and next to 380 K the phosphorescence is eliminated. In the case studied the emission anisotropy is positive for the fluorescence bands SE and LE and it attains approximately 0.2, confirming thus that the transition moments’ directions are in these bands parallel.

Key words: p-Cyano-N,N-Dialkylanilines; Emission Anisotropy; Transition Moments.

Referenzen

ÄHNLICHE DOKUMENTE

• When the Thomson scattering is efficient (i.e., tight coupling between photons and baryons via electrons), the distribution of photons from the rest frame of. baryons

• How does the power spectrum constrain the baryon density.. • Via the speed of sound, the increased inertia of a photon-baryon fluid, and

The strong decrease of the emission anisotropy over the SE band located around 330 nm observed by differ- ent authors, can result from the overlap with the weak absorption

The strong decrease of the emission anisotropy in the SE band located around 330 – 350 nm observed by different authors for CDMA may be a result of the overlapping with the weak

Wird eine Gesamtheit isotrop verteilter Lumi- neszenzmoleküle (LM) in einer Lösung mit linear polarisiertem Licht im Bereich des längstwelligen Absorptionsgebietes angeregt,

The escape of M. luteus from non-cross-linked and cross- linked microparticles was investigated with and without PDEAMA shell. The escape of live M. luteus cells was analyzed

Accordingly, PVA/kefiran composite nanofibers were produced using the electrospinning of PVA, kefiran blend solutions under various electrospinning parameters (such as applied

The effect is interpreted as an influence of the Onsager reaction field on the volume of the solvent shell, which in the excited state is smaller in solvents