کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1527846 995396 2007 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Photophysical properties of 4-methyl 3-phenyl coumarin organized in Langmuir-Blodgett films: Formation of aggregates
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد مواد الکترونیکی، نوری و مغناطیسی
پیش نمایش صفحه اول مقاله
Photophysical properties of 4-methyl 3-phenyl coumarin organized in Langmuir-Blodgett films: Formation of aggregates
چکیده انگلیسی
Langmuir-Blodgett (LB) films of 4-methyl 3-phenyl coumarin (MPC), a non-amphiphilic derivative of coumarin mixed with stearic acid (SA) are studied. The surface pressure-area (π-A) isotherm study at air-water interface reveals a repulsive type of interaction between the MPC and SA molecules resulting in the formation of aggregates of MPC molecules. Absorption, fluorescence and phosphorescence studies indicate the formation of J-type aggregate in LB film. Low temperature (77 K) phosphorescence lifetime is found to be decreased due to aggregate formation. Micro structured aggregates are observed after examining the surface morphology of LB film by scanning electron microscopy (SEM).
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Chemistry and Physics - Volume 104, Issue 1, 15 July 2007, Pages 88-92
نویسندگان
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