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New flexible and transparent solution-based germanium-sulfide polymeric materials

机译:新型柔性透明溶液基硫化锗聚合物材料

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摘要

New flexible and transparent materials based on germanium sulfide were obtained using GeCl4 and 1,3-propanedithiol as precursors. These materials have transparency in the ultraviolet-visible (UV-Vis) spectral region (about 70%), thermal stability up to 200 degrees C and glass transition located at temperatures below 0 degrees C (-37 degrees C, -56 degrees C and -59 degrees C) as shown by differential scanning calorimetry (DSC) curves. Scanning electron microscopy (SEM) images showed that the polymer is homogeneous and presents formation of crystals in some regions of the surface. These polymers also exhibit Ge-S bonds in its structure, as can be observed through Fourier transform infrared (FTIR) (bands at 399, 401, 432 and 470 cm(-1)) and Raman (peaks at 361 and 430 cm(-1)) spectroscopies, and the diffraction patterns X-rays, which suggest the formation of a mixture of GeS2 and GeO2 phases (also confirmed through energy-dispersive X-ray analysis). The coupled thermogravimetric analysis / Fourier transform infrared (TG/FTIR) technique was used to investigate the degradation of the sample. Taken together, the results of these characterizations suggest optical applications, and usability at low temperatures.
机译:以GeCl4和1,3-丙二酚为前驱体,获得了基于硫化锗的新型柔性透明材料。这些材料在紫外可见(UV-Vis)光谱区域(约70%)具有透明性,高达200摄氏度的热稳定性,并且玻璃化转变温度低于0摄氏度(-37摄氏度,-56摄氏度和如差示扫描量热法(DSC)曲线所示,在-59摄氏度)扫描电子显微镜(SEM)图像显示该聚合物是均质的,并在表面的某些区域中形成晶体。这些聚合物还在其结构中表现出Ge-S键,可以通过傅立叶变换红外(FTIR)(在399、401、432和470 cm(-1)处的谱带)和拉曼(在361和430 cm(- 1))的光谱学分析和X射线衍射图谱,表明形成了GeS2和GeO2相的混合物(也通过能量色散X射线分析得到了证实)。热重分析/傅里叶变换红外光谱(TG / FTIR)耦合技术用于研究样品的降解。总而言之,这些表征的结果表明了光学应用以及在低温下的可用性。

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