作者:Hyung-Jo Yoon、Marianna Dakanali、Darcy Lichlyter、Willy M. Chang、Karen A. Nguyen、Matthew E. Nipper、Mark A. Haidekker、Emmanuel A. Theodorakis
DOI:10.1039/c0ob01042a
日期:——
We describe the design, synthesis and fluorescent profile of a family of self-calibrating dyes that provide ratiometric measurements of fluid viscosity. The design is based on covalently linking a primary fluorophore (reference) that displays a viscosity-independent fluorescence emission with a secondary fluorophore (sensor) that exhibits a viscosity-sensitive fluorescence emission. Characterization of fluorescent properties was made with separate excitation of the units and through Resonance Energy Transfer from the reference to the sensor dye. The chemical structures of both fluorophores and the linker length have been evaluated in order to optimize the overall brightness and sensitivity of the viscosity measurements. We also present an application of such ratiometric dyes for the detection of membrane viscosity changes in a liposome model.
我们描述了一系列自校准染料的设计、合成及荧光特性,以提供流体粘度的比率测量。该设计基于将一种主要荧光基团(参考荧光基团)共价连接到一种具有粘度敏感性荧光发射的次要荧光基团(传感器)的方式,前者的荧光发射与粘度无关。我们通过对这两个单元的独立激励以及通过共振能量转移从参考荧光基团到传感器荧光基团,来表征其荧光特性。我们评估了两个荧光基团的化学结构以及连接段的长度,以优化粘度测量的整体亮度和灵敏度。我们还展示了这种比率染料在脂质体模型中检测膜粘度变化的应用。