کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5404385 | 1392780 | 2006 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Guest-host interactions between dichroic dyes and anisotropic hosts
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Guest-host interactions between dichroic dyes and anisotropic hosts Guest-host interactions between dichroic dyes and anisotropic hosts](/preview/png/5404385.png)
چکیده انگلیسی
The guest-host interaction between dichroic dyes and anistropic hosts has been investigated by means of optical spectroscopy. Two different TCNQ adducts; 2-{4-[(2,6-dimethylmorpholin-4-yl)(4-metylpiperidin-1-yl)methylene]cyclohexa-2,5-dien-1-ylidene} malononitrile (MORPIP) and 2-{4-[cyclohex-1-yltetrahydropyrimidin-2(1H-ylidene]cyclohexa-2,5-dien-1-ylidine} malononitrile (AMINO) have been examined dispersed in a range of nematic liquid crystal mixtures. The result is a substantial impact on the absorption and luminescence when compared to the situation in isotropic solvents. The excited state decay exhibits a complex behaviour showing a multi-exponential decay of the time-resolved luminescence. The photoluminescence quantum yields of the chromophores, also shows strong host dependence. For AMINO, we observe a trend which is indicative of a viscosity dependence. The observations are discussed in view of different solvent-solute interactions between guest and host.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Luminescence - Volume 117, Issue 1, March 2006, Pages 113-122
Journal: Journal of Luminescence - Volume 117, Issue 1, March 2006, Pages 113-122
نویسندگان
Lars-Olof PÃ¥lsson, Helen L. Vaughan, Andrew Smith, Marek Szablewski, Graham H. Cross, Tony Roberts, Akira Masutani, Akio Yasuda, Andrew Beeby, David Bloor,