In Situ Monitoring of Photo-Cross-Linking Reaction of Anthracene Chromophores in Polymer Langmuir−Blodgett Films by an Integrated Optical Waveguide Technique
In Situ Monitoring of Photo-Cross-Linking Reaction of Anthracene Chromophores in Polymer Langmuir−Blodgett Films by an Integrated Optical Waveguide Technique
复制标题
通过集成光波导技术原位监测聚合物 Langmuir-Blodgett 薄膜中蒽发色团的光交联反应
作者：
M. Mitsuishi;Tomohiro Tanuma;J. Matsui;A. Chen;T. Miyashita
本文重点关注波导技术的多功能性，用于直接观察聚合物超薄膜中的光化学反应。通过 Langmuir-Blodgett (LB) 技术将 9-蒽基甲基丙烯酸甲酯 (AMMA) 与新戊基甲基丙烯酰胺 (nPMA) 的共聚物单层沉积在锥形石英波导上，并通过集成光波导技术精确监测共聚物 (p(nPMA-AMMA)) 单层的光谱特性。与透射紫外可见光谱相比，吸光度增加了 200 倍。因此，p(nPMA-AMMA) LB 薄膜的光交联反应可以轻松且非常准确地表征为照射时间的函数。
This paper focuses on waveguide technique versatility for direct observation of photochemical reactions in polymer ultrathin films. Monolayers from the copolymer of 9-anthrylmethyl methacrylate (AMMA) with neopentyl methacrylamide (nPMA) were deposited on a tapered quartz waveguide by the Langmuir−Blodgett (LB) technique, and spectroscopic properties of the copolymer (p(nPMA-AMMA)) monolayer were precisely monitored by an integrated optical waveguide technique. Magnitude of absorbance increased by a factor of 200, compared with transmission UV−vis spectroscopy. Consequently, a photo-cross-linking reaction of p(nPMA-AMMA) LB films was characterized easily and very accurately as a function of irradiation time.