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Abstract：
In this work, two stilbene derivatives with different substituents on the phenolic core (phenyl and dimethoxyphenyl) were prepared. The fluorosolvatochromic response of their N-propylated derivatives was studied in a solution of twelve different solvents using UV-Vis absorption and fluorescence emission spectra. Both stilbazolium dyes showed a significant negative solvatochromic effect, with a hypsochromic shift in the visible absorption band of approximately 232 nm and 265 nm for phenyl and the dimethoxyphenyl derivative, respectively, when the solvent was changed from water to pyridine. The stilbene derivatives were subsequently N-alkylated with (3-iodopropyl)trimethoxysilane and covalently anchored to the silica surface. The fluorosolvatochromic response of the prepared silicas compared to N-propylated dyes was then evaluated colorimetrically under daylight and UV illumination. The fluorosolvatochromic behaviour of the anchored dyes was preserved on the silica surface; therefore, the modified silicas could be used for the visual detection of colourless liquids.
摘要：
在这项工作中,制备了两种在酚核上具有不同取代基(苯基和二甲氧基苯基)的二苯乙烯衍生物。使用UV-Vis吸收和荧光发射光谱在十二种不同溶剂的溶液中研究了其N-丙基化衍生物的氟溶剂化变色响应。两种stilbazolium染料均显示出明显的负溶剂化变色效应，苯基和二甲氧基苯基衍生物的可见吸收带中的增色位移约为232nm和265nm，分别,当溶剂从水变为吡啶时。随后将二苯乙烯衍生物用(3-碘丙基)三甲氧基硅烷N-烷基化并共价锚定到二氧化硅表面。然后在日光和UV照射下比色法评估所制备的二氧化硅与N-丙基化染料相比的氟溶剂化变色响应。锚定染料的氟溶剂化变色行为保留在二氧化硅表面；因此，改性二氧化硅可用于无色液体的视觉检测。
