三氟吲哚基俘精酸酐的稳定性及反应动力学
Stability and reaction dynamics of trifluorinated indolylfulgides.
作者信息
Brust Thomas, Draxler Simone, Popp Alexander, Chen Xi, Lees Watson J, Zinth Wolfgang, Braun Markus
机构信息
BioMolekulare Optik, Fakultät für Physik, Ludwig-Maximilians-Universität München and Center For Integrated Protein Science Munich (CIPSM), Oettingenstr. 67, D-80538 München, Germany.
出版信息
Chem Phys Lett. 2009 Aug 6;477(4-6):298-303. doi: 10.1016/j.cplett.2009.07.013.
Quantum efficiencies and ultrafast dynamics of the ring-closure and ring-opening reaction of a trifluorinated dicyclopropyl indolylfulgide with improved photostability are investigated by stationary and ultrafast absorption spectroscopy. The ring-closure reaction occurs on the time scale of 200 fs and is found to be temperature independent (T = 287 - 333 K). However, an activated behaviour is observed for the ring-opening reaction. A comparison with the corresponding non-substituted indolylfulgide shows that the dicyclopropyl group favours the open isomer via lower cyclisation and higher cycloreversion quantum efficiencies and faster dynamics of the ring-opening reaction.
通过稳态和超快吸收光谱研究了具有改善光稳定性的三氟代二环丙基吲哚基俘精酸酐的闭环和开环反应的量子效率及超快动力学。闭环反应发生在200飞秒的时间尺度上，并且发现其与温度无关（T = 287 - 333 K）。然而，开环反应表现出活化行为。与相应的未取代吲哚基俘精酸酐相比，二环丙基基团通过较低的环化和较高的环化逆转量子效率以及更快的开环反应动力学有利于开环异构体。
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