Rigid, dicarboxylic acid ligand 5-(4-carboxyphenyl)-1H-pyrazole-3-carboxylic acid (H₃L) has been synthesized and utilized for assembling a metal organic framework [Pb₂(HL)₂]_n through the hydrothermal technique. The target complex has been described by single-crystal X-ray diffraction, powder X-ray diffraction measurement, elemental analysis and infrared spectroscopy, and proved to be a structurally novel 3D complex. The central metal ions Pb(II) of complex 1 are coordinated to the carboxyl oxygen atoms, possessing two different coordination modes, heptacoordination and octacoordination. In the case of topology, complex 1 exhibits a net topological structure of 2,3,9-c with Schläfi symbol of {3·5²}{3²·4⁴·5¹²·6¹⁴·7²·8²}{5}. The optical properties have been undertaken at room temperature, showing attractive luminescence behavior. Moreover, the electrochemiluminescent intensity of complex 1 can reach up to 1056 a.u. and maintain relatively stable after eight cycles, which could further provide ideas for building organic light-emitting diodes (OLEDs) constructed with a more affordable metal center.

已合成刚性二羧酸配体 5-(4-carboxyphenyl)-1 H -pyrazole-3-carboxylic acid (H ₃ L) 并用于通过水热法组装金属有机骨架 [Pb ₂ (HL) ₂ ] _n技术。通过单晶X射线衍射、粉末X射线衍射测量、元素分析和红外光谱对目标配合物进行了描述，证明其是一种结构新颖的三维配合物。配合物1的中心金属离子Pb(II)与羧基氧原子配位，具有七配​​位和八配位两种不同的配位模式。在拓扑的情况下，复数1显示 2,3,9-c 的网络拓扑结构，Schläfi 符号为 {3·5 ² }{3 ² ·4 ⁴ ·5 ¹² ·6 ¹⁴ ·7 ² ·8 ² }{5}。光学特性是在室温下进行的，显示出有吸引力的发光行为。此外，配合物1的电化学发光强度最高可达1056 au，并在8次循环后保持相对稳定，这可以进一步为构建具有更廉价金属中心的有机发光二极管（OLED）提供思路。