Syntheses, structures and photocatalytic properties of three copper(II) coordination polymers

•Three copper(II) coordination polymers•1, 2 and 3 are good photocatalysts for the degradation of MO).•Two distinct polymeric motifs in one crystal•The intriguing 2-fold interpenetrated network•The 1.2-bis(1,2,4-triazol-1-ylmethyl)benzene and multicarboxylate

Three coordination polymers [Cu2(obtz)2(tdc)2]n (1), {[Cu(obtz)2(H2O)2][Cu2(obtz)2(sip)2]5.5H2O}n (2) and [Cu(obtz)(nip)]n(3) were synthesized by the hydrothermal reaction (obtz = 1.2-bis(1,2,4-triazol-1-ylmethyl)benzene, tdc = 2.5-thiophenedicarboxylate, sip = 5-sulfoisophthalate, nip = 5-nitroisophthalate). 1 shows a ladder-like one-dimensional chain with two side arms. 2 is comprised of two distinct and crystallographically independent polymeric motifs. The first motif in 2 is the ladder-like one-dimensional anionic chain with two side arms. The second motif in 2 is the cationic chain. 3 exhibits the intriguing 2-fold interpenetrated network based on the undulated 2D (4.4) network. 1, 2 and 3 are good photocatalysts for the degradation of methyl orange (MO) under UV irradiation.

Graphical abstractSynopsisThree copper(II) coordination polymers were synthesized by the hydrothermal reaction. 1 shows a ladder-like 1D chain with two side arms. 2 is comprised of the ladder-like 1D anionic chain with two side arms and the cationic chain. 3 exhibits the intriguing 2-fold interpenetrated network. 1, 2 and 3 are good photocatalysts for the degradation of methyl orange (MO) under UV irradiation.Figure optionsDownload full-size imageDownload as PowerPoint slide