pKa Switching Induced by the Change in the π-Conjugated System Based on Photochromism
作者:Yuka Odo、Kenji Matsuda、Masahiro Irie
DOI:10.1002/chem.200501292
日期:2006.5.24
synthesized. The pK(a) values of these compounds change upon photoirradiation. They have a phenol group as a proton source and a pyridinium group as an acceptor unit at each end of the pi-conjugated chain. The cyclization/cycloreversion reactions can be used to control the length of the pi-conjugated chain between the proton source and the acceptor. The change in the pi-conjugated chain length caused the
设计并合成了两个含有2,5-二芳基-3-噻吩基的二芳基乙烯衍生物1a和2a。这些化合物的pK(a)值在光辐照下会发生变化。它们在π-共轭链的每个末端具有一个酚基作为质子源和一个吡啶鎓基作为受体单元。环化/环还原反应可用于控制质子源和受体之间的pi共轭链的长度。π共轭链长度的变化引起pK(a)转换。