The development and intracellular applications of a water-soluble Zn(II) sensor (WZS) are described. 4-Aminonaphthalimide is used as the fluorophore of WZS for its high photostability, long excitation and emission wavelength, large Stokes' shift and inert response to pH. N,N-Bis(2-pyridylmethyl)ethylenediamine (BPEN), used as a receptor for Zn(II), is attached to the fluorophore through a rigid benzene framework on the imide moiety. Spectroscopic studies indicate that this fluorophore–receptor linking strategy could be used for the development of effective photoinduced electron transfer (PET) sensors. WZS is pH-insensitive and shows high selectivity for Zn(II) against other biologically relevant metal ions. Cellular applications revealed that WZS could be used for the imaging of intracellular Zn(II).
本文描述了一种
水溶性Zn(II)传感器(WZS)的开发及其在细胞内的应用。4-
氨基
萘酞菁被用作WZS的荧光团,因其高光稳定性、长激发和发射波长、大斯托克斯位移以及对pH的无反应性。N,N-双(2-
吡啶甲基)
乙二胺(
BPEN)作为Zn(II)的受体,通过
酞菁部分的刚性苯结构与其连接。光谱学研究表明,这种荧光团-受体连接策略可用于开发有效的光诱导电子转移(PET)传感器。WZS对pH不敏感,对Zn(II)显示出对其他
生物相关
金属离子的高选择性。细胞应用研究表明,WZS可用于细胞内Zn(II)的成像。