{[Ph4P]2[Cd2(tp)2(Htp)2(H2O)]·3H2O}n and {[Ph4P][Zn(tp)(Htp)]·2H2O}n: Two interesting 2D metal–terephthalate polymeric networks

•Two 2D metal–terephthalate polymeric solids were synthesized and characterized.•A novel polycatenated network of covalent 44 net and noncovalent 4664 net.•Structure-directing effects play an important role on two polymeric networks.

Two new metal–terephthalate polymeric solids, {[Ph4P]2[Cd2(tp)2(Htp)2(H2O)]·3H2O}n (1) and {[Ph4P][Zn(tp)(Htp)]·2H2O}n (2) (tp = terephthalate, [Ph4P] = tetraphenylphosphonium), are obtained from similar hydrothermal synthesis reactions. Upon the template effect of large bulky [Ph4P]+ cation, the d10 transition metal centers are bridged by tp ligands to form an interesting 2D undulating lamellar host network for 1 and a 2D square-grid lamellar host network for 2, respectively. Both compounds exhibit intense fluorescent emission bands at 434 nm (λexc = 333 nm) for 1 and 420 nm (λexc = 350 nm) for 2 in the solid state at room temperature.

Graphical abstractUpon the template effect of tetraphenylphosphonium cation, the d10 transition metal centers in the two new polymeric solids, {[Ph4P]2[Cd2(tp)2(Htp)2(H2O)]·3H2O}n (1) and {[Ph4P][Zn(tp)(Htp)]·2H2O}n (2), are bridged by terephthalate ligands to form an interesting 2D undulating lamellar host network for 1and a 2D square-grid lamellar host network for 2, respectively. Figure optionsDownload full-size imageDownload as PowerPoint slide