260
S. Gowri et al. / Spectrochimica Acta Part A 81 (2011) 257–260
Fig. 4. 1H NMR spectrum of LTP.
ciency results show a very high signal output of 1.1 V with input
level of SHG response of a given material is inherently dependent
upon its structural attributes. On a molecular scale, the extent of
charge transfer (CT) across the NLO chromophore determines the
level of SHG output [8,12]. The presence of strong intermolecular
hydrogen bonds can extend this level of CT into the supramolecu-
lar realm, due to their electrostatic and directed character, thereby
enhancing the SHG response.
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The molecular charge transfer complex LTP was synthesized.
From the powder XRD patterns various planes of reflections have
been identified and experimental d values were obtained. The
grown LTP crystal was confirmed by single-crystal XRD analysis
and the lattice parameters were obtained. It is found that the crys-
tal belongs to the orthorhombic crystal system with space group
P212121. FTIR ascertains the molecular structure of LTP and also
establish the prevalent charge transfer phenomenon in the com-
plex. The decomposition temperature and % weight loss of the
material were found out from TG/DTA analyses. The degree of
crystallinity and purity from a sharp endothermic peak was also
confirmed. The reasonable NLO efficiency, predicted for the first
time in this novel compound, has been confirmed by Kurtz–Perry
powder second harmonic generation (SHG) experiments. Focus
may be made on this material for nonlinear optical applications
as the TGA results confirm the possibility of usage of this material
up to its melting point.
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