catena-Poly[[diaqua­(2,2′-bipyridine-κ2 N,N′)zinc]-μ-2,2′-[1,4-phenylene­bis(sulfanedi­yl)]diacetato-κ2 O:O′]

In the polymeric title complex, [Zn(C10H8O4S2)(C10H8N2)(H2O)2]n, the Zn2+ ion lies on a twofold rotation axis and exhibits an octa­hedral environment, in which it is coordinated by two trans O atoms from two symmetry-related 2,2′-[1,4-phenyl­enebis(sulfanedi­yl)]diacetate anions, two N atoms from one 2,2′-bipyridine ligand, and two cis O atoms from water mol­ecules. The dihedral angle between the two pyridine rings is 11.5 (1)°. Adjacent Zn2+ ions are bridged in a monodentate manner by the diacetate anions, forming a chain structure extending parallel to [101], and are further linked into the final three-dimensional structure by O—H⋯O hydrogen bonds between the coordinating water mol­ecules as donor and the non-coordinating carboxyl­ate O atoms as acceptor atoms

Transmission resonance in a composite plasmonic structure

The design, fabrication, and optical properties of a composite plasmonic structure, a two-dimentional array of split-ring resonators inserted into periodic square holes of a metal film, have been reported. A new type of transmission resonance, which makes a significant difference from the conventional peaks, has been suggested both theoretically and experimentally. To understand this effect, a mechanism of ring- resonance induced dipole emission is proposed.Comment: 14 pages, 4 figure