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NLO-Active
Metal Oxides
The synthesis and characterization
of crystallographically non-centrosymmetric
(NCS) materials is being investigated.
We attempt to synthesize new NCS
materials by combining cations susceptible
to second-order Jahn-Teller (SOJT)
distortions. Once synthesized, we
optically characterize these materials
through powder second-harmonic generating
(SHG) measurements. These measurements
allow us to not only determine the
magnitude of the SHG efficiency,
but also to ascertain the structural
origin of the response.
New Oxyhalides
We synthesize new oxyhalides through
a variety of techniques including
transport and reflux synthesis.
Recently, we synthesized an anionically
templated material, by using NbCl5
as a transport agent. In our material
Cl- templates a three-dimensional
cationic oxide framework. We have
also synthesized a variety of layered
PbII materials that undergo ion-exchange
at room temperature.
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Synthesis
and Characterization of Te2SeO7
– A
Powder SHG study of TeO2,
Te2SeO7,
Te2O5,
and
TeSeO4,
Chem. Mater., 13, 1910, 2001.
Synthesis
and Characterization of NaGaTe2O6
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2.4H2O – An
Open-Framework Tellurite related
to Zemannite,
Inorg. Chem., 40, 1978, 2001.
SbSbxM1-xO4
(M = NbV or TaV): Solid Solution
Behavior and second-Harmonic
Generating Properties,
J. Solid State Chem., 161, 57,
2001.
Anionic
Templating: Synthesis, Structure,
and Characterization of Novel
Three-Dimensional Oxyhalides:
Te4M3O15
. Cl (M = Nb5+ or Ta5+ ), Inorg.
Chem., 41, 3805, 2002.
Synthesis, Structure, and Characterization
of a New Second-Harmonic-Generating
Tellurite: Na2TeW2O9,
Chem. Mater., 14, 3174, 2002.
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