A new unsymmetric tetradentate salamo-like chemical sensor H₂L for fluorescent recognition of Zn²⁺ has been designed and synthesized. The sensor can recognize Zn²⁺ from other metal ions examined with selectivity, anti-interference, reliability and high sensitivity (LOD = 1.89 × 10⁻⁶ M) in ethanol/H₂O solution. The results of UV-Vis and fluorescent spectra analyses, X-ray crystallographic study and DMol³ simulation and calculation (on Materials Studio) indicate that the chelation-enhanced fluorescence (CHEF) recognition mechanism of the sensor H₂L for Zn²⁺ is of its hindered PET process. The sensor H₂L for Zn²⁺ has excellent fluorescence characteristics and has potential application value in biological and environmental systems.

中文翻译：

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用于 Zn2 荧光识别的不对称类萨拉莫化学传感器。

设计并合成了一种新型非对称四齿类萨拉莫化学传感器H ₂ L，用于荧光识别Zn ^{2+ 。}该传感器可以从检测的其他金属离子中识别出Zn ²⁺  ，在乙醇/H ₂ O溶液中具有选择性、抗干扰性、可靠性和高灵敏度（LOD = 1.89 × 10 ^{-6 M）。UV-Vis 和荧光光谱分析、X 射线晶体学研究和 DMol 3}模拟和计算（在 Materials Studio 上）的结果表明传感器H ₂ L对 Zn ^{2+的螯合增强荧光（CHEF）识别机制}是其受阻的PET过程。Zn ²⁺传感器H ₂ L具有优异的荧光特性，在生物和环境系统中具有潜在的应用价值。