在AU (NHC) 2发光蒸气色传感器中的"开启-关闭"Au (I)...Cu (I) 相互作用
Christoph E Strasser1, Vincent J Catalano
1Department of Chemistry, University of Nevada, Reno, Nevada 89557, USA.
Journal of the American Chemical Society
|July 3, 2010
概括
这项研究引入了新的发光金铜化合物,这些化合物在应对溶剂蒸汽时会改变颜色. 这些蒸发色材料为敏感的化学传感应用提供了潜力.
科学领域:
- 协调化学 协调化学
- 材料科学 材料科学 材料科学
- 发光材料的发光材料
背景情况:
- 黄金 (I) 和铜 (I) 复合物以其多样化的协调化学和发光特性而闻名.
- N-异环碳 (NHCs) 是多功能联结体,稳定金属中心并影响其电子性质.
- 蒸气色变,即暴露于蒸气后光学特性发生的变化,是传感器开发的理想特征.
研究的目的:
- 用NHC连接体合成和表征新型异金属金铜复合体.
- 研究这些复合物的蒸发色行为,专注于溶剂蒸气诱导的发光变化.
- 阐明控制观测到的蒸汽色变的结构和电子因素.
主要方法:
- 合成一个三电离金(I) -铜(I) 复合物 ([Au(NHC) ((2)) ](+) [Cu(MeCN) ((2)) ](2+)) 和它的甲醇添加物.
- 单晶X射线衍射以确定合成化合物的分子结构.
- 发光光谱法用于监测暴露于各种溶剂蒸气 (MeOH,MeCN,,H2O) 的排放颜色变化.
主要成果:
- 金(I) -铜(I) 复合物及其甲醇添加物呈现出不同的发光颜色 (分别为蓝色和绿色).
- 这些结构揭示了溶剂协调/解离后Au-Cu相互作用和协调环境的变化.
- 在暴露于不同溶剂蒸汽时,观察到从蓝色到绿色,黄色和色的可逆色彩变化,证明了vapochromism.
结论:
- 合成的金 (I) -铜 (I) 复合物是有效的分子蒸发色材料.
- 由溶剂蒸气触发的联体替代反应会诱导显著的发光变化,归因于"开启-关闭"的Au-Cu相互作用.
- 这些材料对化学传感和响应材料的应用有前途.
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