Molecular Viscosity Sensors with Two Rotators for Optimizing the Fluorescence Intensity-Contrast Trade-Off
作者:Seung-Chul Lee、Chang-Lyoul Lee、Jeongyun Heo、Chan-Uk Jeong、Gyeong-Hui Lee、Sehoon Kim、Woojin Yoon、Hoseop Yun、Sung O. Park、Sang Kyu Kwak、Sung-Ha Park、O-Pil Kwon
DOI:10.1002/chem.201704036
日期:2018.2.26
A series of fluorescent molecular rotors obtained by introducing two rotational groups (“rotators”), which exhibit different rotational and electron‐donating abilities, are discussed. Whereas the control molecular rotor, PH, includes a single rotator (the widely used phenyl group), the PO molecular rotors consist of two rotators (a phenyl group and an alkoxy group), which exhibit simultaneous strongly
讨论了通过引入两个旋转基团(“转子”)获得的一系列荧光分子转子,这些旋转基团表现出不同的旋转能力和给电子能力。控制分子转子PH包括单个转子(广泛使用的苯基),而PO分子转子则由两个转子(苯基和烷氧基)组成,它们同时具有很强的供电子性和易旋转性。与控制转子PH相比,PO分子转子表现出高出一个数量级的量子产率(荧光强度),同时表现出明显更高的荧光对比度。这些性质与烷氧基的强大的供电子能力和低的旋转能量垒直接相关,如动态荧光实验和量子化学计算所证实。PO分子转子表现出两个荧光弛豫路径,而PH分子转子表现出单个荧光弛豫路径。成功地证明了使用PO分子转子对细胞粘度作图的细胞荧光成像。