Supramolecular structure and second harmonic generation in strontium bis(hydrogen L-malate) hexahydrate.
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.
de Matos Gomes
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Departamento de Física, Universidade do Minho, P-4710-057 Braga, Portugal.
Rodrigues
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Costa
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Nogueira
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Belsley
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