Title:	Molecular Structure, NLO properties and vibrational analysis of L-Histidine tetra fluro borate by experimental and computational spectroscopic techniques
Authors:	John, Nimmy L Abraham, Sunila Sajan, D Philip, Reji Joy, Nithin Chitra, R
Keywords:	DFT NBO AIM Hirshfeld surface NLO Z-scan
Issue Date:	Feb-2020
Publisher:	Spectrochimica Acta Part A: Molecular and Bimolecular Spectroscopy
Citation:	Spectrochimica Acta Part A: Molecular and Bimolecular Spectroscopy, 2020, Vol.226, AR.No.117615
Abstract:	L-histidine tetra fluroborate (L-HTFB) is a semi-organic NLO material. Ab-initio computationswere performed at CAM-B3LYP/ 6–311++g(d,p) level of theory to arrive at the structures, energies, and vibrationalwave numbers. The experimental FT-IR and FT-Raman spectra of L-HTFB have been recorded and analyzed. It is compared with the simulated spectra. The scaled wave numbers obtained are in good agreement with the experimental values. Hirshfeld surface analysis represented in the 2D fingerprint plot reveals the interaction within the compound. Optimized geometry reveals that the complexes L -histidine (L-H) and tetrafluoroborate (TFB) are linked by HF bond which provides inter and intra molecular hydrogen bonded interactions such as N10-H16⋯F25, N11-H17⋯F22, N11-H14⋯F24, N11-H14⋯N10 and N11-H15⋯O12. The inter-molecular distances H17⋯F22, H14⋯F24 and H16⋯F25 are in between 1.82 Å and 2.53 Å. The intra molecular distances H14⋯N10 and H15⋯O12 are found to be at 2.17 Å and 1.71 Å which stabilizes lone pair electron of N10 and O12 with energies 11.89 and 59.91 KJ/mol respectively. The intra and inter molecular hyperconjugations responsible for the stability of the molecule are well identified theoretically using the NBO analysis. Third order optical nonlinearity is measured by means of the open aperture Z-scan technique which reveals that the crystal has optical limiting property. Photoluminescence results clearly indicate the use of L-HTFB as a new violet-light emitting material.
Description:	Open Access.
URI:	http://hdl.handle.net/2289/8465
ISSN:	1386-1425 1873-3557 (online)
Alternative Location:	http://dx.doi.org/10.1016/j.saa.2019.117615
Copyright:	Elsevier B.V.
Appears in Collections:	Research Papers (LAMP)

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