The structures of six new diacylhydrazidate-based coordination polymers were reported. Based on their better photoluminescence properties, their sensing abilities towards Cr2O72− were investigated.

The simple hydrothermal self-assembly of metal ions, 5,5′-(4,5-dicarboxy-1,2-phenylene)bis(oxy)diisophthalic acid (L1 ' ), and N 2 H 4 ·H 2 O at pH = 8 (adjusted by oxalic acid) created two new acylhydrazinetetracarboxylate-extended 3-D Sr 2+ and Ba 2+ coordination polymers [Sr 2 (HL1)(H 2 O)] (H 5 L1 = 5,5′-(1,4-dioxo-1,2,3,4-tetrahydrophthalazine-6,7-diyl)bis(oxy)diisophthalic acid) 1 and [Ba 5 (HL1) 2 (ox)(H 2 O) 2 ]·6H 2 O·N 2 H 4 (ox = oxalate) 2. H 5 L1 originated from the in situ acylation of L1′ with N 2 H 4 . X-ray single-crystal diffraction analysis reveals that (i) the 3-D network of 1 is based on a rod-like secondary building unit [a]

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