R. A. Silva-Molina et al. / Natural Science 3 (2011) 319-322
Copyright © 2011 SciRes. OPEN ACCESS
322
change in the dipole moment of the molecule above of
pKa = 9.7 also shows a good efficiency, it is given that
the sample with more acid pH showed that contains
γ-glycine and the more basic pH showed that contains
GSN phase in more concentration.
The transparent glycine sodium nitrate crystals (GSN
crystals) were successfully obtained using slow evapora-
tion technique at room temperature and we characterized
them by various techniques. The presence of fundamen-
tals groups was verified by a RAMAN microscope. The
GSN structure was characterized using XRD powder, the
X-ray pattern showed that the samples of GSN to basic
pH contained the GNS phase and the more acid pH is
observed that is obtained GSN on minor concentration
but too obtain subproducts like γ-glycine which increase
the efficiency of SHG.
4. ACKNOWLEDGEMENTS
The authors thank to the National Council of Science and Techno-
logy of Mexico for its financial support, (grant 132856). Also to the
Center for Research on Advanced Materials, Department for Polymers
and Materials Research and Department of Physics.
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