کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1497484 | 993016 | 2006 | 7 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Photostability of laser dyes incorporated in formamide SiO2 ORMOSILs Photostability of laser dyes incorporated in formamide SiO2 ORMOSILs](/preview/png/1497484.png)
The sol–gel process provides a low temperature chemical route for the preparation of rigid transparent matrix materials. Under this process, luminescent organic dye molecules were incorporated into organically modified silicate (ORMOSIL) host matrices. The photostability of these laser dyes encapsulated in a solid matrix was studied using optical absorption and luminescence. The photochemical mechanisms of the dye response under N2 laser irradiation were studied using UV and fluorescence spectra measurement. The evolution of the maximum of the emission and excitation curves as function of accumulated irradiated energy was fitted by exponential equations. The matrix protects the dye from the oxidation and dimerization reactions. The dye molecules exhibited photobleaching due to their photodegradation. The ORMOSIL doped with Nile blue exhibits good photostability after 6 h of irradiation.
Journal: Optical Materials - Volume 28, Issue 10, July 2006, Pages 1209–1215