Title:	Three-photon absorption and vibrational spectroscopic study of 2-methylamino-5-chlorobenzophenone
Authors:	Sajan, D. Chaitanya, K. Safakath, K. Philip, Reji Suthan, T. Rajesh, N.P.
Keywords:	ICT FT-IR FT-Raman Nonlinear optics
Issue Date:	Apr-2013
Publisher:	Elsevier
Citation:	Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy , 2013, Vol.106, p253
Abstract:	In this paper, the vibrational spectral analysis and three-photon absorption properties of an organic material of 2-methylamino-5-chlorobenzophenone have been reported. The geometry and harmonic vibrational wavenumbers are calculated with the help of B3LYP density functional theory method. The detailed interpretation of the vibrational spectra has been carried out with the aid of normal coordinate analysis following the scaled quantum mechanical force field methodology (SQM). SQM force fields have also been used to calculate potential energy distribution (PED) in order to make conspicuous vibrational assignments. The nonlinear absorption properties have been investigated in ethanol solution at 532 nm using the Z-scan technique employing laser pulses of 5 ns duration. Open aperture Z-scan data reveal the presence of effective three-photon absorption for ns pulses at 532 nm resulting in a strong optical limiting behavior, indicating possible photonic applications.
Description:	Restricted Access. An open-access version is available at arXiv.org (one of the alternative locations)
URI:	http://hdl.handle.net/2289/5716
ISSN:	1386-1425 1873-3557(Online)
Alternative Location:	http://dx.doi.org/10.1016/j.saa.2012.12.045
Copyright:	2013 Elsevier
Appears in Collections:	Research Papers (LAMP)

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