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Linker Deficiency, Aromatic Ring Fusion and Electrocatalysis in a Porous Ni8 Pyrazolate Network

submitted on 11.10.2020, 13:12 and posted on 12.10.2020, 13:33 by Jieying Hu, Xiangling Deng, Hu Zhang, Yingxue Diao, Shengxian Cheng, Sai-Li Zheng, Wei-Ming Liao, Jun He, Zhengtao Xu
The cruciform linker molecule here features two designer functions: the pyrazole donors for framework construction, and the vicinal alkynyl units for benzannulation to form nanographene units into the Ni8-pyrazolate scaffold. Unlike the full 12 connections of the Ni8(OH)4(H2O)2 clusters in other Ni8-pyrazolate networks, significant linker deficiency was observed here, leaving about half of the Ni(II) sites capped by acetate ligands, which can be potentially removed to open the metal sites for reactivity. The crystalline Ni8-pyrazolate scaffold also retains the crystalline order even after thermal treatments (up to 300 °C) that served to partially graphitizes the neighboring alkyne units. The resultant nanographene components enhance the electroactive properties of the porous hosts, achieving hydrogen evolution reaction (HER) activity that rivals topical nickel/palladium-enabled materials.


Design and Synthesis of High Proton Conducting Superacid Framework Materials

National Natural Science Foundation of China

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Design and Synthesis of Conductive Coordination Polymer Ultrathin Nanosheets Based on Large π Conjugated Ligands

National Natural Science Foundation of China

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Local Innovative and Research Teams Project of Guangdong Pearl River Talents Program (2017BT01Z032)

Science and Technology Planning Project of Guangdong Province (2017A050506051)

Science and Technology Program of Guangzhou (201807010026)

Research Grants Council of HKSAR (CityU 11306018)

SRG grant of City University of Hong Kong (Project 7004820)


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Guangdong University of Technology



ORCID For Submitting Author


Declaration of Conflict of Interest

no conflict of interest