کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6493156 | 44019 | 2009 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Photoswitching of the third-order nonlinear optical properties of azobenzene-containing phthalocyanines based on reversible host-guest interactions
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
بیو مهندسی (مهندسی زیستی)
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Two water soluble azobenzene and phthalocyanine dyads with D-Ï-A alignment were synthesized. It was found that both compounds showed very large molecular cubic hyperpolarizabilities which are at the order of 10â30 esu as the result of their unique chemical structure. The azobenzene moieties of these compounds, upon alternating illumination of UV and visible light, could reversibly associate with α-CD to form inclusion complexes through host-guest interaction in aqueous media, resulting in apparent influences to the 3rd NLO properties of these compounds. This influence is especially significant for the phthalocyanine whose central metal atom is copper (II). The molecular cubic hyperpolarizability γ of the inclusion complex for the copper phthalocyanine is 2.1 Ã 10â30 esu. When the inclusion complex dissociated under the illumination of 365 nm light, γ value increased to 4.2 Ã 10â30 esu, which is a 100% enhancement. Taking account of the large molecular cubic hyperpolarizabilities of these compounds, the present materials are potential as ideal 3rd NLO photoswitching systems.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 206, Issues 2â3, 15 August 2009, Pages 213-219
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 206, Issues 2â3, 15 August 2009, Pages 213-219
نویسندگان
Zihui Chen, Sida Dong, Cheng Zhong, Zhi Zhang, Lihong Niu, Zhongyu Li, Fushi Zhang,