Abstract Catalytic synthesis of potential chemosensor 2-(1H-Benzimidazol-2-yl)phenol (HBYP) has been prepared by three components cyclization reaction. It can behaves as a selective fluorescent sensor for the detection of Fe3+ metal ion. HBYP has been characterized by 1H NMR, 13C NMR, mass spectral studies and elemental analysis. Single crystal XRD analysis has been carried out to confirm the structure of HBYP and it shows the imidazole ring is essentially planar and monoclinic crystal. Addition and increasing concentration of Fe3+ ions into HBYP results dramatic fluorescence quenching. Other cations, including Ca2+, Co2+, Ni2+, Cd2+, Pb2+, Zn2+ and Mg2+ had little influence in the fluorescence intensity. Surprisingly reversible fluorescence enhancement has been observed with the addition of H3PO4 due to the deactivation of iron complex.

中文翻译：

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2-(1H-Benzimidazol-2-yl)phenol-ESIPT 过程的荧光调谐

摘要 通过三组分环化反应制备了具有潜力的化学传感器2-(1H-苯并咪唑-2-基)苯酚(HBYP)的催化合成。它可以用作检测 Fe3+ 金属离子的选择性荧光传感器。HBYP 已通过 1H NMR、13C NMR、质谱研究和元素分析进行​​表征。已进行单晶 XRD 分析以确认 HBYP 的结构，它表明咪唑环基本上是平面和单斜晶体。将 Fe3+ 离子添加到 HBYP 中并增加其浓度会导致显着的荧光猝灭。其他阳离子，包括 Ca2+、Co2+、Ni2+、Cd2+、Pb2+、Zn2+ 和 Mg2+ 对荧光强度的影响很小。由于铁络合物的失活，添加 H3PO4 后观察到了令人惊讶的可逆荧光增强。