• Home
  • Search Results
  • Growth, thermal, dielectric and mechanical properties of L-phenylalanine-benzoic acid: a nonlinear optical single crystal.

Growth, thermal, dielectric and mechanical properties of L-phenylalanine-benzoic acid: a nonlinear optical single crystal.

Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy (2013-06-12)
S Tamilselvan, M Vimalan, I Vetha Potheher, S Rajasekar, R Jeyasekaran, M Antony Arockiaraj, J Madhavan
ABSTRACT

An efficient amino acid family nonlinear optical single crystal L-phenylalanine-benzoic acid (LPB) was conveniently grown by slow evaporation technique at room temperature. The crystal system and the lattice parameters were analyzed by single crystal X-ray diffraction studies. The grown crystal has excellent transmission in the entire visible region and its lower cut-off wavelength was found to be 248 nm. The SHG efficiency of the grown crystal was found to be 1.6 times higher than that of KDP crystal. The Laser damage threshold value of LPB has been found to be 6.5 GW/cm(2). The sample was thermally stable up to 134°C. Microhardness, dielectric and AC/DC conductivity measurements were made along (001) plane and reported for the first time. Microhardness studies revealed that the sample belongs to hard nature. Frequency dependent dielectric constant was measured for different temperatures and found maximum dielectric constant of 14 for 363 K. Photoconductivity studies of LPB divulged its negative photoconducting nature.

MATERIALS
Product Number
Brand
Product Description

Supelco
Mettler-Toledo Calibration substance ME 18555, Benzoic acid, analytical standard, for the calibration of the thermosystem 900, traceable to primary standards (LGC)
Sigma-Aldrich
Benzoic acid, meets analytical specification of Ph. Eur., BP, USP, FCC, E210, 99.5-100.5% (alkalimetric)
Supelco
Benzoic acid, certified reference material for titrimetry, certified by BAM, ≥99.5%
Supelco
Benzoic acid, Pharmaceutical Secondary Standard; Certified Reference Material
Supelco
Melting point standard 121-123°C, analytical standard
Sigma-Aldrich
Benzoic acid, SAJ first grade, ≥99.5%
Sigma-Aldrich
Benzoic acid, SAJ special grade, ≥99.5%
Sigma-Aldrich
Potassium benzoate, ReagentPlus®, 99%
Sigma-Aldrich
Benzoic acid, ReagentPlus®, 99%
Sigma-Aldrich
Benzoic acid, natural, ≥99.5%, FCC, FG
Sigma-Aldrich
Benzoic acid, ≥99.5%, FCC, FG
Sigma-Aldrich
Benzoic acid, ACS reagent, ≥99.5%
Sigma-Aldrich
Benzoic acid, puriss. p.a., ACS reagent, reag. Ph. Eur., ≥99.9% (alkalimetric)
Sigma-Aldrich
Benzoic acid, purified by sublimation, ≥99%
Supelco
SS Benzoic Acid, 2000 μg/mL in dichloromethane, analytical standard
Supelco
Benzoic acid, Standard for quantitative NMR, TraceCERT®