Abstract：
We report a light-irradiation method to control the synchronous nucleation of a donor-acceptor (D-A) fluorophore for growing highly uniform single-crystalline microrods, which is in sharp contrast to the prevailing methods of restricting spontaneous nucleation and additionally adding seeds. The D-A fluorophore was observed to undergo photoinduced electron transfer to CrCl3, leading to the generation of HCl and the subsequent protonation of the D-A fluorophore. By intensifying photoirradiation or prolonging its duration, the concentration of protonated D-A fluorophores can be rapidly increased to a high supersaturation level. This results in the formation of a controlled number of nuclei in a synchronous manner, which in turn kickstart the epitaxial growth of protonated D-A fluorophores towards uniform single-crystalline microrods of controlled sizes. The light-regulated synchronous nucleation and uniform growth of microrods are a unique phenomenon that can only be achieved by specific Lewis acids, making it a novel probing method for sensitively detecting strong Lewis acids such as chromium chloride.
摘要：
我们报告了一种光照射方法，用于控制供体-受体（D-A）荧光团的同步成核，以生长高度均匀的单晶微棒，这与限制自发成核和额外添加种子的流行方法形成鲜明对比。观察到D-A荧光团经历光诱导的电子转移到CrCl3,导致HCl的产生和随后D-A荧光团的质子化。通过加强光照射或延长其持续时间，质子化的D-A荧光团的浓度可以迅速增加到高的过饱和水平。这导致以同步方式形成受控数量的核，这反过来又启动了质子化的D-A荧光团的外延生长，使其朝着受控尺寸的均匀单晶微棒生长。微棒的光控同步成核和均匀生长是一种独特的现象，只有特定的路易斯酸才能实现，使其成为灵敏检测强路易斯酸如氯化铬的新型探测方法。
