1,4-di(1H-pyrazol-4-yl)benzene

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2) Choi, H. J.; Dincă, M.; Long, J. R.  J. Am. Chem. Soc. 2008, 130, 7848–7850, DOI: 10.1021/ja8024092 ; Broadly Hysteretic H2 Adsorption in the Microporous Metal−Organic Framework Co(1,4-benzenedipyrazolate)

3) Choi,H.J; Dinca,M; Dailly, A; Long, J.R.; Energy Environ. Sci., 2010,3, 117-123, DOI: 10.1039/B917512A ; Hydrogenstorage in water-stable metal–organic frameworks incorporating 1,3- and 1,4-benzenedipyrazolate