A Multi-Addressable Switch Based on the Dimethyldihydropyrene Photochrome with Remarkable Proton-Triggered Photo-opening Efficiency
作者:Diego Roldan、Saioa Cobo、Frédéric Lafolet、Neus Vilà、Constance Bochot、Christophe Bucher、Eric Saint-Aman、Martial Boggio-Pasqua、Marco Garavelli、Guy Royal
DOI:10.1002/chem.201404858
日期:2015.1.2
major effects on the photoisomerization efficiency, the most remarkable examples being to enhance the quantum yield of the opening reaction and to allow fast and quantitative conversions at much lower radiant energies. This effect was rationalized by theoretical calculations. We also show that the reverse reaction, that is, going from the open form to the closed form, can be electrochemically triggered
合成了一系列基于反式-10b,10c-二甲基-10b,10c-二氢py(DHP,“封闭形式”)骨架的光致变色衍生物,它们的光异构化导致相应的环庚二烯(CPD,“开放形式”)异构体已通过UV / Vis和1的调查1 H NMR光谱。发现用吸电子吡啶鎓基团取代DHP核芯对光异构化效率有重大影响,最显着的例子是提高开环反应的量子产率,并允许在低得多的辐射能下进行快速和定量的转化。通过理论计算可以合理地实现这一效果。我们还表明,CPD单元的氧化可通过电化学方式触发逆反应,即从开放形式变为闭合形式,并且吡啶取代的DHP的光开放性质可通过质子化有效地调节,该系统表现为一个多址分子开关。这些可多址寻址的光致变色材料显示出响应材料发展的希望。