| 1-萘甲酸/锰(Ⅱ)配合物的合成、晶体结构、Hirshfeld表面分析及其对Fe3+的荧光传感 |
| Synthesis, crystal structure, Hirshfeld surface analysis, and fluorescent sensing for Fe3+ of an Mn(Ⅱ) complex based on 1-naphthalic acid |
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| 摘要: 在水热条件下，以硫酸锰为金属源，1-萘甲酸(Hna)、4,4'-二甲基-2，2'-联吡啶(Dmbpy)为配体合成了一例锰配合物[Mn (na)2(Dmbpy)(H2O)]·Hna (1)，并通过元素分析、单晶X射线衍射、粉末X射线衍射、红外光谱、Hirshfeld表面分析和热重分析进行了表征。单晶X射线衍射结果表明：1属三斜晶系$P \overline{1}$空间群，中心金属Mn(Ⅱ)位于六配位扭曲的三棱柱构型中，分子间通过C/O—H…O、C—H…π和π…π相互作用形成二维超分子网状结构。利用CrystalExplorer对1的Hirshfeld表面进行了分析。固态荧光光谱显示，1在347 nm的激发波长下，最大发射波长为423 nm。在荧光传感实验中，1对Fe3+表现出选择性识别的能力，检出限为0.52 μmol·L-1，此外还探究了Fe3+猝灭1的荧光的机理。 |
| 关键词: 锰(Ⅱ)配合物 晶体结构 Hirshfeld表面分析 固态发射 荧光传感 Fe3+ |
| 基金项目: 青海省自然科学基金(No.2020-ZJ-964Q)和2024年青海民族大学研究生创新项目(No.12M2024036)资助。 |
| Abstract: Under hydrothermal conditions, a manganese complex [Mn(na)2(Dmbpy)(H2O)]·Hna (1) was synthesized by using manganese sulfate, 1-naphthoic acid (Hna), and 4,4'-dimethyl-2,2'-bipyridine (Dmbpy), and characterized by elemental analysis, single crystal X ray diffraction, powder X ray diffraction, infrared spectrum, Hirshfeld surface analysis, and thermogravimetric analysis. The single-crystal X-ray diffraction result shows that 1 belongs to the triclinic crystal system, $P \overline{1}$ space group, and the central metal Mn(Ⅱ) is located in a six-coordinated, distorted trigonal prism configuration. The 2D supramolecular network structure is formed by intermolecular C/O—H…O, C—H…π, and π…π interactions. CrystalExplorer was used to analyze the Hirshfeld surface of 1. The 2D fingerprint of 1 shows that the H…H interaction plays a significant role in maintaining structural stability. Powder X-ray diffraction analysis shows that the synthesized 1 is in pure phase. Thermogravimetric analysis shows that 1 has good thermal stability. The solid-state fluorescence spectrum showed that 1 had a maximum emission wavelength of 423 nm at an excitation wavelength of 347 nm. In the fluorescence sensing experiment, 1 showed selective recognition ability to Fe3+ with a detection limit of 0.52 μmol·L-1. In addition, the mechanism analysis shows that the fluorescence quenching of 1 may be due to the energy-competitive absorption between Fe3+ and 1. CCDC: 2400837. |
| Keywords: Mn(Ⅱ) complex crystal structure Hirshfeld surface analysis solid-state emission fluorescence sensing Fe3+ |
| 投稿时间：2024-11-10 修订日期：2025-03-30 |
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