کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5187898 | 1381140 | 2008 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Optical birefringence induced by two-photon absorption in polythiophene bearing an azochromophore
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آلی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
We carried out experiments of induced birefringence via two-photon absorption in spin-coated films of the conjugated polymer poly[2-[ethyl-[4-(4-nitro-phenylazo)-phenyl]-amino]-ethane (3-thienyl)ethanoate], PAzT, at 680 and 775Â nm. This process allows recording in the bulk because of the spatial confinement of the birefringence provided by the two-photon absorption. The induced birefringence is associated with molecular reorientation caused by the two-photon induced isomerization of the azochromophores attached to the polymer backbone. In addition, the two-photon absorption spectrum of PAzT was measured to help selecting the excitation wavelength for two-photon absorption induced birefringence.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Polymer - Volume 49, Issue 6, 17 March 2008, Pages 1562-1566
Journal: Polymer - Volume 49, Issue 6, 17 March 2008, Pages 1562-1566
نویسندگان
D.S. Correa, M.R. Cardoso, V.C. Gonçalves, D.T. Balogh, L. De Boni, C.R. Mendonça,