具有胆固醇液晶的气体的光学监测
Yang Han1, Katherine Pacheco, Cees W M Bastiaansen
1Laboratory for Macromolecular and Organic Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands.
Journal of the American Chemical Society
|February 13, 2010
概括
新的光学气体传感器使用液晶,当与气体反应时会改变颜色. 这项技术对智能包装应用具有前景,可检测二氧化碳和氧气,用于食品保存.
科学领域:
- 材料科学 材料科学 材料科学
- 分析化学 分析化学
- 化学传感器 化学传感器
背景情况:
- 光学传感器对于监测环境和工业条件至关重要.
- 胆固醇液晶 (CLC) 提供可调节的光学特性.
- 开发基于CLC的选择性和响应性传感器仍然是一个挑战.
研究的目的:
- 引入一种新的方法,用于光学气体监测使用胆固醇液晶杂有反应性性化合物.
- 为了证明这种方法用于检测二氧化碳和氧气的可行性.
- 探索食品保存的智能包装中的潜在应用.
主要方法:
- 兴奋剂是一种商业CLC混合物 (E7) 与特定的性化合物,旨在与目标分析物发生反应.
- 在化学反应时利用形曲功率 (HTP) 的变化,改变CLC音程长度.
- 监测CLC薄膜反射带的变化,作为分析物的存在和度的指标.
主要成果:
- 一个二氧化碳传感器是使用CLC合了性胺-TADDOL复合体的开发,显示反射带转移从637到495nm在CO2暴露后由于碳酸盐的形成.
- 使用CLC添加了奇拉性滴醇衍生物的氧气传感器,显示了由于氧化到二硫化物的反射波段从542nm转移到600nm.
- 这两种传感器原型都基于分析剂诱导的化学反应证明了可逆 (CO2) 和不可逆 (O2) 反应.
结论:
- 建议在CLC中使用反应性性剂的方法为光学气体传感提供了一个多功能平台.
- 已证明的CO2和O2监测能力对于智能包装应用非常重要.
- 这种方法为开发具有可调节的选择性和灵敏度的先进化学传感器提供了一个有希望的途径.
相关概念视频
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