کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1483474 | 991597 | 2007 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Linear and non-linear optical properties of 2,5-disubstituted pyrroles supported by a catalyst-free SiO2 sonogel network
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کلمات کلیدی
71.20.RvNon-linear optics - اپتیک غیر خطیLaser–matter interactions - تعاملات لیزر مادهAbsorption - جذبsilicon - سیلیسیم Optical spectroscopy - طیف سنجی نوریLuminescence - لومینسانس Organic–inorganic hybrids - هیبرید های ارگانیک-غیر ارگانیکPolymers and organics - پلیمرها و ارگانیسم هاPorosity - پوکی استخوان
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله

چکیده انگلیسی
The preparation and optical characterization of pyrrole based sol-gel hybrid materials generated by ultrasonic irradiation (Sonogel composites) are presented in this work. Pyrrole compounds were recently synthesized in our group by a modification of the Schulte-Reisch reaction; these molecular systems were dissolved at different concentrations in tetrahydrofuran (THF) and optimally embedded into a catalyst-free SiO2 sonogel network. For this purpose, we exploited the novel catalyst-free (CF) sonolysis route to produce highly pure sol-gel glasses, generated via sonochemical reactions. This approach has been recently developed in our research group and has been successfully implemented to develop several hybrid composites for optical applications. By this method, homogeneous and stable solid-state hybrid samples suitable for optical characterization can be produced. The high porosity exhibited by the sonogel matrix allowed us to prepare several pyrrole doped composites with variable dopant concentration. The linear and nonlinear optical (NLO) properties of these amorphous hybrid structures were determined by absorption- and photoluminescent (PL)-spectroscopies, and by the optical third harmonic generation (THG) techniques, respectively. The implemented catalyst-free sonolysis route produced SiO2-host networks of high chemical and optical purity, suitable for optical and photonic applications.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Non-Crystalline Solids - Volume 353, Issue 26, 1 August 2007, Pages 2557-2566
Journal: Journal of Non-Crystalline Solids - Volume 353, Issue 26, 1 August 2007, Pages 2557-2566
نویسندگان
Omar G. Morales-Saavedra, Gloria Huerta, Roberto Ortega-MartÃnez, Lioudmila Fomina,