Enhancing the Photostability of Arylvinylenebipyridyl Compounds as Fluorescent Indicators for Intracellular Zinc(II) Ions
作者:Zhao Yuan、Ali H. Younes、John R. Allen、Michael W. Davidson、Lei Zhu
DOI:10.1021/acs.joc.5b00503
日期:2015.6.5
bright, zinc(II)-sensitive fluoroionophores. The applicability of AVBs as fluorescent indicators for imaging cellular zinc(II), however, is limited by low photostability, partially attributable to the photoisomerization of the vinylene functionality. Two configurationally immobilized (i.e., “locked”) AVB analogues are prepared in this work. The zinc(II)-sensitive photophysical properties and zinc(II) affinities
芳基亚乙烯基联吡啶(AVB)配体是明亮的锌(II)敏感的氟离子载体。但是,AVB作为用于细胞锌(II)成像的荧光指示剂的适用性受到低光稳定性的限制,该光稳定性部分归因于亚乙烯基官能团的光异构化。在这项工作中,准备了两种配置固定(即“锁定”)的AVB类似物。AVB及其锁定类似物对锌(II)的光物理性质和锌(II)亲和力均在有机和水性介质中表征。发射的锌(II)敏感性归因于这些化合物的电荷转移激发态的锌(II)依赖能。构型锁定的配体具有改善的光稳定性,同时保持了其AVB祖细胞的亮度和锌(II)敏感性。