A new Na/Co-based heterometallic metal-organic framework, [Na2Co(SDCA)(μ2-OH)2(μ2-H2O)2(Azopy)]n (where Azopy = 4,4'-Azopyridine and SDCA = 2,5'-thiophenedicarboxylic acid) (1) with nanorod-shaped morphology was synthesized using mixed-ligand approach via slow-diffusion technique under ambient conditions. The crystal structure study demonstrates the proportion of Co(II) and Na(I) metal node to be 1:2 and the acquired coordination network reveals as a 3D architecture. Topologically, the 4-c Na(I) ion directs in situ assembly of 4-c SDCA linker and 6-c Co(II) ion, resulting in the formation of 4,4,6-c net with a topology named as smm3. Additionally, 1 was incorporated as a binder-free material for a glassy carbon electrode (1-GCE) to explore its supercapacitor performance, which reveals a high specific capacitance of 321.8 F g-1 at 4 A g-1 and notable rate performance (∼78.9% of initial capacitance up to 16 A g-1) as well as excellent cycling stability (retains 97.4% after 5000 cycles). The demonstrated strategy of employing different heterometallic clusters with mixed ligands markedly increases MOF's complexity and induces synergistic properties, which is highly favorable for electrochemical applications. Hence, the present approach can be extended to build a wide range of MOFs and synergistically enhanced electrochemical performance can be achieved.

中文翻译：

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高性能高性能超级电容器的混合配体架构独特的基于拓扑异金属钠/钴的金属有机框架。

一种新的基于Na / Co的杂金属金属有机框架[Na2Co（SDCA）（μ2-OH）2（μ2-H2O）2（Azopy）] n（其中Azopy = 4,4'-Azopyridine，SDCA = 2，采用混合配体方法，通过慢扩散技术，在环境条件下合成了具有纳米棒状形态的5'-噻吩二甲酸（1）。晶体结构研究表明Co（II）和Na（I）金属节点的比例为1：2，并且获得的配位网络显示为3D体系结构。在拓扑上，4-c Na（I）离子指导4-c SDCA连接子和6-c Co（II）离子的原位组装，从而形成4,4,6-c网，拓扑名为smm3 。此外，还引入了1作为玻璃碳电极（1-GCE）的无粘合剂材料，以探索其超级电容器性能，该电容器具有321的高比电容。8 F g-1在4 A g-1时具有出色的速率性能（高达16 A g-1时约为初始电容的78.9％）以及出色的循环稳定性（5000次循环后保持97.4％）。已证明采用具有混合配体的不同杂金属簇的策略显着增加了MOF的复杂性并产生了协同性能，这对电化学应用非常有利。因此，本方法可以扩展以构建广泛的MOF，并且可以实现协同增强的电化学性能。这对电化学应用非常有利。因此，本方法可以扩展以构建广泛的MOF，并且可以实现协同增强的电化学性能。这对电化学应用非常有利。因此，本方法可以扩展以构建广泛的MOF，并且可以实现协同增强的电化学性能。