In this study, thin films of polymer poly(methyl methacrylate) were prepared using a drop casting method. Two newly synthesized aldehyde derivatives, 2‐bromomalonaldehyde and 5,6‐dihydroimidazo[2,1‐b]thiazole‐2‐carbaldehyde, were used at different concentrations to dope the films. The prepared films were transparent and therefore studied for application in photonics. Optical characterization of the samples was carried out using different spectroscopy techniques. Absorption spectra for both samples were obtained using a UV–vis light spectrophotometer. Other significant optical parameters, such as refractive index, extinction coefficient, and band gap energies, were calculated from the absorption spectra. The effect of doping concentration on these parameters was studied. Emission spectra were obtained using a fluorescence spectrophotometer and the effect of doping was observed. Fourier transform infrared spectra of the doped films were obtained and compared with the pure compound to note changes in peak values and peak intensity. This present work studied the effect of doping on optical properties and examined the application of the samples for photonics.

中文翻译：

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滴铸法制备两种用于光子的醛衍生物薄膜及其光学参数表征。

在这项研究中，使用滴铸法制备了聚合物聚甲基丙烯酸甲酯的薄膜。使用两种不同浓度的新合成的醛衍生物2-溴丙二醛和5,6-二氢咪唑并[2,1-b]噻唑2-甲醛来掺杂薄膜。制备的膜是透明的，因此被研究用于光子学中。使用不同的光谱技术对样品进行光学表征。使用紫外可见分光光度计获得两个样品的吸收光谱。从吸收光谱中计算出其他重要的光学参数，例如折射率，消光系数和带隙能量。研究了掺杂浓度对这些参数的影响。使用荧光分光光度计获得发射光谱，并观察到掺杂的影响。获得掺杂膜的傅立叶变换红外光谱，并将其与纯化合物进行比较，以记录峰值和峰值强度的变化。本工作研究了掺杂对光学性能的影响，并研究了光子学样品的应用。