N-2-Aryl-1,2,3-triazoles: A Novel Class of UV/Blue-Light-Emitting Fluorophores with Tunable Optical Properties
作者:Wuming Yan、Qiaoyi Wang、Quan Lin、Minyong Li、Jeffrey L. Petersen、Xiaodong Shi
DOI:10.1002/chem.201002937
日期:2011.4.26
new class of UV/blue‐light‐emitting fluorophores. Though both N‐1‐aryl‐1,2,3‐triazoles and N‐2‐aryl‐1,2,3‐triazoles gave strong photo absorption under excitation at 330 nm, only the N‐2‐analogous showed strong fluorescence emission in the UV/blue range with high efficiency in various solvents (quantum yield Φ around 0.3–0.5). Significant substituted group effects were observed, allowing tunable optical
N-2-芳基-1,2,3-三唑衍生物(NATs)被开发为一类新的发出UV /蓝光的荧光团。尽管N-1-芳基1,2,3-三唑和N-2-芳基1,2,3-三唑在330 nm激发下均具有很强的光吸收能力,但只有N-2类似物显示出很强的荧光发射在紫外/蓝光范围内,在各种溶剂中均具有较高的效率(量子产率Φ约为0.3-0.5)。观察到了显着的取代基效应,使发射的光学特性可调(最大λ)从350-400 nm范围变化,斯托克斯(Stokes)从38-93 nm范围变化。计算研究以及X射线晶体结构表明了三唑环与N-2位置上的芳基之间有效共轭的重要性。提出了平面分子内电荷转移(PICT)机理,并得到溶剂效应研究的支持。简单衍生得到NAT-修饰的赖氨酸和强UV /蓝色发光二NAT(Φ= 0.76,λ最大= 390),这表明在生物和材料科学的研究这种新的类荧光团的巨大潜力。