Spectroscopic studies of UV irradiated erythrosine B thin films prepared by spin coating technique

被引：20

作者：

Zeyada, H. M. ^{[1
]}

El-Mallah, H. M. ^{[2
]}

Atwee, T. ^{[1
]}

EI-Damhogi, D. G. ^{[2
]}

机构：

[1] Univ Damietta, Fac Sci New Damietta, Dept Phys, Dumyat 34517, Egypt

[2] Univ Port Said, Dept Phys & Math Engn, Fac Engn, Port Fouad 42526, Egypt

来源：

SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY | 2017年 / 179卷

关键词：

Erythrosine B; Thin films; UV irradiation; OPTICAL-PROPERTIES; PHTHALOCYANINE; ABSORPTION; FLUORESCENCE; PORPHYRIN;

D O I：

10.1016/j.saa.2017.02.039

中图分类号：

O433 [光谱学];

学科分类号：

0703 ; 070302 ;

摘要：

The spectroscopic studies of etythrosine B thin films manufactured by the spin coating technique have been presented. The spectra of infrared absorption allow characterization of vibrational modes for erythrosine B in powder form, pristine and UV irradiated thin films. The absorption spectra recorded in UV-vis-NIR for pristine films of erythrosine B display two main bands. UV irradiation on erythrosine B films decreased absorbance over the spectra. Indirect allowed transition with optical energy gap of 2.57 eV is observed in pristine films. UV irradiation introduced structural defects and decreased optical band gap. Some of the optical absorption parameters and their relation to UV irradiation times, namely molar extinction coefficient (epsilon), electronic dipole strength (q(2)), and oscillator strength (f), of the principal optical transitions have also been evaluated. (C) 2017 Elsevier B.V. All rights reserved.

引用

页码：120 / 124

页数：5

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