Abstract

A novel hyperbranched polymer was designed and synthesized as a spectral probe for Fe³⁺. The polymer showed high selectivity and sensitivity to Fe³⁺ in CH₃CN/H₂O (75/25, v/v). Fe³⁺ caused a new peak at 560 nm in UV–Vis absorption, a 31 nm fluorescence redshift, a 35-fold enhancement in fluorescence intensity at 575 nm and an 8.3-fold enhancement in fluorescence quantum yield, accompanied by a visual color change from colorless to pink and a fluorescence from dark to bright orange. The colorimetric and fluorescent detection limits were 1.29 and 1.88 µM, respectively. The detection was almost not interfered by other common metal cations. The polymer could be applied in assaying Fe³⁺ in real sample with similar precision to that of atomic absorption spectroscopy.

中文翻译：

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新型超支化聚合物的合成及其在多通道Fe 3+传感中的应用

摘要

设计并合成了一种新型的超支化聚合物作为Fe ³⁺的光谱探针。该聚合物在CH ₃ CN / H ₂ O（75/25，v / v）中显示出高选择性和对Fe ^3+的敏感性。Fe ³⁺在560 nm的UV-Vis吸收中产生一个新峰，31 nm的荧光红移，575 nm的荧光强度提高35倍，荧光量子产率提高8.3倍，并伴随可见的颜色变化从无色到粉红色，从深到橙色的荧光。比色和荧光检测极限分别为1.29和1.88 µM。该检测几乎不受其他常见金属阳离子的干扰。该聚合物可用于测定Fe ³⁺ 在真实样品中具有与原子吸收光谱法相似的精度。