Photo-Detection of Solvent Polarities using Non-Invasive Coatings in Capillaries

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• 作者：Larisa Florea ; Fernando Benito-Lopez ; ^{fernando.lopez@dcu.ie} ; Alexandre Hennart ; Dermot Diamond
• 关键词：Spiropyran ; micro-capillary ; ROMP ; solvatochromism
• 刊名：Procedia Engineering
• 出版年：2011
• 出版时间：2011
• 年：2011
• 卷：25
• 期：Complete
• 页码：1545-1548
• 全文大小：605 K

文摘

Fused silica-capillaries were functionalised with spiropyran-polymer brushes using a spiropyran functionalised norbornyl derivative as the monomer (SP-M). The polymerisation was achieved by surface-initiated ring-opening metathesis polymerisation (Si-ROMP) . We obtained a three dimensional arrangement, covalently attached to the inner wall of the fused-silica capillary, where the spiropyran moiety has the freedom to open and close in response to light (UV, white light). The spiropyran moieties present a very strong dependence on the polarity of the solvent what is expressed by a shift in its main UV-Vis absorption band therefore functionalised capillaries were successfully used to photo-detect solvents of different polarity while passing through the capillary.