کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5376022 | 1504310 | 2008 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Thermoluminescence of poly(9-vinylcarbazole) modified by substitution with halogens
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The thermoluminescence studies of poly(9-vinylcarbazole) (PVK) modified by substitution with halogens (Cl, Br, I) carried out in 15-325Â K temperature range are reported. Spectral analyses of the thermoluminescence at different temperatures are discussed and compared with the analogues results obtained for unsubstituted PVK. It has been found that introduction of halogen atoms to the carbazol-9-yl groups does not change the thermoluminescence mechanisms characteristic of PVK, but reduces the probability of excimer formation due to a steric hindrance. For all the investigated poly(9-vinylhalogenocarbazole)s, the bathochromic shift in the emission spectra was observed, due to mesomeric effects of the halogen atoms on the Ï-carbazolic system.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemical Physics - Volume 348, Issues 1â3, 2 June 2008, Pages 249-253
Journal: Chemical Physics - Volume 348, Issues 1â3, 2 June 2008, Pages 249-253
نویسندگان
Ewa Dobruchowska, Ireneusz Glowacki, Jacek Ulanski, Jerzy Sanetra, Jan Pielichowski,