In this study, the fluorescence properties of Co(II) Schiff base complex (Co(II) complex) were examined. The sensor properties of the Co(II) complex nitroaromatic compounds [(DNB, TNT, DNT, 2-NP, 4-nitrophenol (NP), 2,4-dintrophenol (DNP) and 1,3,5-trinitrophenol (TNP) e.g.,] were investigated by fluorescence spectroscopy. Compound has high sensitivity for the sensing of 1,3,5-trinitrophenol (TNP) (sv: 4.74 × 10 M) with low LOD of 0.034 μM. It was revealed that the complex ([CoLCl(HO)]∙2HO) exhibited strong fluorescence properties. Additionally, the synthesized Co(II) complex was utilized for fluorescence quenching-based TNP detection in water solution with high selectivity and sensitivity. The stoichiometry of the compound and TNP was found to be 1:1 (ligand/TNP) via fluorescence titrations (Job's plot).

中文翻译：

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利用希夫碱-Co(II) 复合物作为稳定的发光探针，用于高选择性检测水介质中的 2,4,6-三硝基苯酚

本研究考察了 Co(II) 希夫碱络合物（Co(II) 络合物）的荧光性质。 Co(II) 络合物硝基芳香族化合物 [(DNB、TNT、DNT、2-NP、4-硝基苯酚 (NP)、2,4-二硝基苯酚 (DNP) 和 1,3,5-三硝基苯酚 (TNP)] 的传感器特性通过荧光光谱法研究了该化合物对 1,3,5-三硝基苯酚 (TNP) (sv: 4.74 × 10 M) 的检测具有高灵敏度，LOD 为 0.034 μM。此外，合成的 Co(II) 配合物可用于水溶液中基于荧光猝灭的 TNP 检测，具有高选择性和灵敏度。通过荧光滴定为 1:1（配体/TNP）（乔布图）。