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A 3D metal-organic framework,[Zn(PAM)(4-bpdb)] ·DMF(1),has been constructed with aπ- electron-rich ligand 4,4-methylenebis(3-hydroxy-2-naphthalenecarboxylic acid)(PAM)and 1,4-bis(4-pyridyl)-2,3-diaza-1,3-butadiene(4-bpdb).