Journal ArticleDOI
Excimer Fluorescence of Poly(N‐vinylcarbazole)
P. C. Johnson,H. W. Offen +1 more
TLDR
Fluorescence spectra and lifetimes of carbazole, 1,3-bis(N carbazolyl)propane and poly(Nvinyl‐carbazole) have been studied as a function of pressure to 30 kbar at room temperature and 77°K polymer films show exclusively excimer fluorescence (τ=43 nsec) as mentioned in this paper.Abstract:
Fluorescence spectra and lifetimes of carbazole, 1,3‐bis(N‐carbazolyl)propane and poly(N‐vinyl‐carbazole) have been studied as a function of pressure to 30 kbar at room temperature and 77°K Polymer films show exclusively excimer fluorescence (τ=43 nsec) at room temperature This is not quenched at 77°K but appears together with a new emission (τ=12 nsec) attributed to traps arising from exciton coupling between adjacent carbazole chromophores The comparative P, T response of the three compounds suggests that excimers do not form between adjacent chromophores in the amorphous polymerread more
Citations
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Journal ArticleDOI
Emission spectra of the vinyl polymers with pendant carbazolyl groups.
TL;DR: In this article, the emission properties of poly(N-vinyl carbazole) (PVCz) prepared by radical and cationic polymerization, the oligomers of poly[2-(N-carbazolyl)ethyl vinyl ether] (PCzEVE) were investigated in solutions.
Journal ArticleDOI
Excimer formation in vinyl polymers. II. Rigid solutions of poly(2‐vinylnaphthalene) and polystyrene
Curtis W. Frank,Larry A. Harrah +1 more
TL;DR: In this article, a statistical model based on the rotational isomeric state approximation is used to formulate an expression for the fraction of excimer forming sites in the solid systems, which is consistent with an activated exciton migration to preformed excimer sites.
Journal ArticleDOI
Photophysical Processes in Polymers. IV. Excimer Formation in Vinylaromatic Polymers and Copolymers
TL;DR: In this article, the authors investigated interchain excimer formation in copolymers of polystyrene, poly(poly(1•vinylnaphthalene), poly(2−vinyl-naphthylene) and poly(1.5•polystyrene) with styrene and with methyl methacrylate solid films as well as solutions.
Journal ArticleDOI
On the triplet state of poly(N-vinylcarbazole)
João Pina,J. Sérgio Seixas de Melo,Hugh D. Burrows,Andrew P. Monkman,Suppiah Navaratnam,Suppiah Navaratnam +5 more
TL;DR: In this article, triplet state properties including transient triplet absorption spectrum, intersystem crossing yields in solution at room temperature and phosphorescence spectra, quantum yields and lifetimes at low temperature as well as singlet oxygen yields were obtained for poly(N-vinylcarbazole) (PVK) in 2-methyl-tetrahydrofuran (2-MeTHF), cyclohexane or benzene.
Journal ArticleDOI
Structure, luminescence and polymerization of a diacetylene crystal: 1,6-di-(n-carbazolyl)-2,4 hexadiin (DCH)
TL;DR: In this paper, the authors showed that the carbazole planes are stacked along β with a distance of 3.35 A and showed strong phosphorescence from four traps, the depths of which are 23, 71, 224 and 369 cm −1 respectively.
References
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Journal ArticleDOI
Intramolecular Excimer Formation. I. Diphenyl and Triphenyl Alkanes
TL;DR: In this article, a class of compounds which are so structured that the phenyl groups along a main alkane chain are separated by exactly three carbon atoms, e.g., 1,3-diphenylpropane, 1, 3,5-triphenylpentane, has been found to possess unique fluorescence characteristics.
Journal ArticleDOI
Transfer of Electronic Excitation Energy in Polyvinyl Carbazole
TL;DR: In this article, the energy transfer in amorphous polyvinyl carbazole (PVCA) has been studied by fluorescence quenching experiments using perylene, trinitrofluorenone, and hexachloro-p‐xylene as guest molecules.