No abstract

Here we report the synthesis and structural characterization of heterotrimetallic (Pt II 2 Pd II 2 Mn II 2 ) n coordination polymers that show different dimensionalities and electrocatalytic activities depending on chloride and bromide employed in the system. The reaction of the Pt II 2 Pd II 2 tetranuclear complex [Pd 2 Pt 2 (NH 3 ) 4 (D-pen) 4 ] (1), bearing free carboxylate groups, with Mn 2+ in the presence of chloride produced the (Pt II 2 Pd II 2 Mn II 2 ) n coordination polymer [Mn 2 Cl 2 (H 2 O) 6 (1)]Cl 2 (2 Cl ), in which the Pt II 2 Pd II 2 units of 1 are linked by [MnCl(H 2 O) 3 ] + moieties in a 1:2 ratio to form a 2D sheetlike structure. The corresponding reaction in the presence of bromide also gave the (Pt II 2 Pd II 2 Mn II 2 ) n coordination polymer [Mn 2 (H 2 O) 6 (1)]Br 4 (3 Br ), but 3 Br adopted a 3D network structure via a 1:1 linkage of the Pt II 2 Pd II 2 units with [Mn 2 (H 2 O) 6 ] 4+ moieties. These complexes showed appreciably different electrocatalytic activities for H 2 evolution.

Hydroxido-bridged CuII6M double-cubane clusters (M = MnII, CoII) supported by D-penicillaminedisulfide were unexpectedly formed by treating a D-penicillaminato CuII2PtII2 complex with MBr2 in water. The clusters displayed heterogeneous electrocatalytic activities...

Here, we present a heterometallic coordination polymer that exhibits heterogeneous electrocatalytic activities for both water reduction and water oxidation. Treatment of the PtII2PdII2 tetranuclear complex [Pd2{Pt(NH3)2(D-pen)2}2] ([1]; D-H2pen = D-penicillamine)...