Effect of bis-triazole based secondary ligands on the structure of coordination polymers generated from terephthalic acid

<p>Reactions of Zn/Cd(ClO<sub>4</sub>)<sub>2</sub>·6H<sub>2</sub>O and terephthalic acid (H<sub>2</sub>BDC) with three bis-triazole ligands afforded three coordination polymers under solvothermal conditions, {[Zn(BDC)(L1)]·H<sub>2</sub>BDC}<sub>n</sub> (<b>1</b>), {[Zn(BDC)(L2)<sub>0.5</sub>]·H<sub>2</sub>O}<sub>n</sub> (<b>2</b>), and {[Cd<sub>2</sub>(BDC)<sub>2</sub>(L3)(DMF)(H<sub>2</sub>O)<sub>2</sub>]·2H<sub>2</sub>O]}<sub>n</sub> (<b>3</b>) (L1 = bis(4-(4H-1,2,4-triazol-4-yl)phenyl)methane, L2 = bis(4-(4H-1,2,4-triazol-4-yl)phenyl)ethane, and L3 = 1,4-bis(4H-1,2,4-triazol-4-yl)benzene). Solid <b>1</b> displayed a 2-D structure which contained two kinds of rings. Both <b>2</b> and <b>3</b> were 3-D threefold interpenetrating frameworks. Solid <b>2</b> showed a <b>α–Po</b><b>-</b>related net, while <b>3</b> exhibited an <b>acs</b>-related network with a binuclear node. Furthermore, the photoluminescent properties of <b>1–3</b> were investigated.</p>