Organosilanes are used in a broad range of industrial, cosmetic, and personal care products. They serve as bridges between inorganic or organic substrates and organic/polymeric matrices. They are also versatile intermediates and can be used for a variety of synthetic applications. They do not exist naturally and have to be synthesized. Evaluation of intermediates and products resulting from the synthesis processes of organosilanes can be challenging. In this study, gas chromatography with vacuum ultraviolet spectroscopic detection (VUV) was used to analyze Si-containing compounds that are commercially available or were synthetically prepared. VUV measures full scan absorption in the range of 120–240 nm, a region that provides unique absorption signatures for chemical compounds. VUV absorption spectra of organosilanes showed rich and featured characteristics in this wavelength range. Theoretical computations of VUV absorption spectra based on time-dependent density functional theory were also explored as a complementary tool for identification. In addition, the synthesis process of isomeric benzodioxasiline compounds (ortho-, meta-, and para-) was monitored by GC-VUV. It was demonstrated that GC-VUV can be used for easy and rapid differentiation of organosilanes, including structural isomers.

有机硅烷被广泛用于工业，化妆品和个人护理产品中。它们充当无机或有机基质与有机/聚合物基质之间的桥梁。它们还是通用中间体，可用于多种合成应用。它们不是自然存在的，必须加以合成。对有机硅烷合成过程中产生的中间体和产物的评估可能具有挑战性。在这项研究中，采用真空紫外光谱检测（VUV）气相色谱法分析市售或合成制备的含硅化合物。VUV在120-240 nm范围内测量全扫描吸收，该区域为化合物提供了独特的吸收特征。在此波长范围内，有机硅烷的VUV吸收光谱显示出丰富的特征。还探索了基于时间依赖性密度泛函理论的VUV吸收光谱的理论计算，作为识别的辅助工具。此外，异构体苯并二恶唑啉化合物的合成工艺（通过GC-VUV监测邻位，间位和对位）。已证明GC-VUV可用于轻松快速地区分有机硅烷，包括结构异构体。