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。
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。
Reactivity of a pyridinium-substituted dimethyldihydropyrene switch under aerobic conditions: self-sensitized photo-oxygenation and thermal release of singlet oxygen
作者:Saioa Cobo、Frédéric Lafolet、Eric Saint-Aman、Christian Philouze、Christophe Bucher、Serena Silvi、Alberto Credi、Guy Royal
DOI:10.1039/c5cc04763c
日期:——
A reversible photo-switch is converted into an endoperoxide when irradiated with red light under air. This photo-produced species thermally releases 1O2.
[EN] DIHYDROPYRENE DERIVATIVES, PROCESSES FOR PREPARING THE SAME AND THEIR USES<br/>[FR] DÉRIVÉS DIHYDROPYRÈNE, PROCÉDÉS POUR LES PRÉPARER ET LEURS UTILISATIONS
申请人:UNIV GRENOBLE ALPES
公开号:WO2016193471A1
公开(公告)日:2016-12-08
The present invention relates to dihydropyrene derivatives of formula I, processes for preparing the same and their uses.
The conductance properties of a photoswitchable dimethyldihydropyrene (DHP) derivative have been investigated for the first time in single-molecule junctions using the mechanically controllable break junction technique. We demonstrate that the reversible structure changes induced by isomerization of a single bispyridine-substituted DHP molecule are correlated with a large drop of the conductance value. We found a very high ON/OFF ratio (>10(4)) and an excellent reversibility of conductance switching.
DIHYDROPYRENE DERIVATIVES, PROCESSES FOR PREPARING THE SAME AND THEIR USES