The delayed nuorcscence found in rigid-glass solutions of cyanine dyes is shown to result from the presence of lrace quantities of phosphorescent impurities and not from n lorv-encrg photoionization process, as previously suggesred. For quinoline cyanine dyes, lhc predomiwnt impurities are idcnrifi
Low-temperature delayed fluorescence in 1,4-dibromonaphthalene
β Scribed by J.M.J. Vankan; W.S. Veeman; R.C. Haltiwanger; P.T. Beurskens
- Publisher
- Elsevier Science
- Year
- 1983
- Tongue
- English
- Weight
- 409 KB
- Volume
- 99
- Category
- Article
- ISSN
- 0009-2614
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β¦ Synopsis
The occurrence of low-temperature triplet-triplet annihilation in 1.4-dibromonaphthalene is strongly correlated with the presence of molecules of the isomer 1,Sdibromonaphthalene. The main part of the delayed fluorescence ori@ates from thii guest molecule. The crystal structure of 1,Sdibromonaphthalene has been determined.
π SIMILAR VOLUMES
The ESR spectrum of linear triplet e&tons in single crystals of 1 $dibromonaphthaIene (DBN) was studied ig the temperature range berween 2Β°K and room temperature. The exciton migration maintains its one-dimensional character up to 300Β°K. The ESR hnewidth is strongly temperature dependent. This fact
Rcmvrd 10 I-cbruar} 1982; III I-ial form 16 hfarctr 1982 QUIZ the study of trlplct ~WIOP trapping in l.~dibromanaphChalcnc ir appcvs that several opuully ,~ccssible ewI tons cm cwt wrh c'wwt~on cncrgrs wlhm 1 cm-' and LfcUmes dlffcrmg by oh o orders of magnitude Furthermore usp-lk S'UWS cust ==2 cm-