121669-70-3Relevant articles and documents
Flexible side arms of ditopic linker as effective tools to boost proton conductivity of Ni8-pyrazolate metal-organic framework
Chung, Lai-Hon,Feng, Zihao,He, Jun,Hu, Jieying,Li, Jian-Rong,Liao, Wei-Ming,Luo, Qian-Ru,Wu, Can-Min,Zhang, Hu,Zhong, Yuan-Hui
supporting information, (2022/01/11)
Two primitive metal-organic frameworks (MOFs), NiL1 and NiL2, based on Ni8O6-cluster and ditopic pyrazolate linkers, L1 (with rigid alkyne arms) and L2 (with flexible alkyne chains), were prepared. The proton conductivities of these MOFs in pristine form and imidazole-encapsulated forms, Im@NiL1 and Im@NiL2, were measured and compared. Upon introduction of imidazole molecules, the proton conductivity could be increased by 3 to 5 orders of magnitude and reached as high as 1.72 × 10?2 S/cm (at 98% RH and 80 °C). Also, whether imidazole molecules were introduced or not, Ni8O6-based MOFs with L2 in general gave better proton conductivity than those with L1 signifying that flexible side arms indeed assist proton conduction probably via establishment of efficient proton-conducting channels along with formation of highly ordered domains of water/imidazole molecules within the network cavities. Beyond the active Ni8O6-cluster, tuning flexibility of linker pendants serves as an alternative approach to regulate/modulate the proton conductivity of MOFs.
Alkynyl-rich compound, preparation method thereof and metal organic framework material
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Paragraph 0050-0052, (2020/11/23)
The invention relates to the technical field of organic synthesis, in particular to an alkynyl-rich compound, a preparation method thereof and a metal organic framework material. Disclosed is the lkynyl-rich compound. The structure of the compound is show
Synthesis method of pyrazol-4-boronic acid pinacol ester
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Paragraph 0018, (2017/01/17)
The invention discloses a synthesis method of pyrazol-4-boronic acid pinacol ester. The method consists of: reacting 4-halogenopyrazole with BOC2O to obtain N-BOC-4-halogenopyrazole, then carrying out reaction with alkyl magnesium lithium, adding aminopinacol borate, conducting acid quenching deprotection, then carrying out rotary evaporation filtering to obtain a solid, and adding organic alkali to conduct dissociation so as to obtain a product. The synthesis method has the advantages of simple operation, good reproducibility and high product purity, and is suitable for large-scale production.