title: Supramolecular structure and second harmonic generation in strontium bis(hydrogen L-malate) hexahydrate.
abstract: The title compound, tetraaquabis(hydrogen L-malato)strontium(II) dihydrate, [Sr(C4H5O5)2(H2O)4].2H2O, is a new non-linear optical semi-organic material with a second harmonic generation efficiency approximately 3.5 times greater than that of potassium dihydrogen phosphate. The malate anions are interconnected through directional O-H...O hydrogen bonding, in a head-to-tail arrangement, creating extended anionic chains along [001]. Neighbouring parallel chains are crosslinked by water molecules, resulting in a three-dimensional architecture. The Sr2+ ion is coordinated by eight O atoms. This material is a new candidate for non-linear optical applications since the crystals are stable and easy to grow.
authors.affiliation: Departamento de Física, Universidade do Minho, P-4710-057 Braga, Portugal.
authors.forename: E
authors.initials: E
authors.lastname: de Matos Gomes
authors.forename: V H
authors.initials: VH
authors.lastname: Rodrigues
authors.forename: M M R R
authors.initials: MM
authors.lastname: Costa
authors.forename: E
authors.initials: E
authors.lastname: Nogueira
authors.forename: M S
authors.initials: MS
authors.lastname: Belsley