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Single‐crystal growth of 4‐hydroxy‐3‐methoxy benzaldehyde by the Bridgman technique and its characterization
Author(s) -
Kannan V.,
Jayaprakasan M.,
Bairava Ganesh R.,
Ramasamy P.
Publication year - 2006
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.200522234
Subject(s) - monoclinic crystal system , vanillin , benzaldehyde , crystal (programming language) , powder diffraction , single crystal , fourier transform infrared spectroscopy , materials science , analytical chemistry (journal) , crystal growth , differential thermal analysis , thermal analysis , crystallography , diffraction , chemistry , crystal structure , thermal , optics , organic chemistry , thermodynamics , physics , computer science , programming language , catalysis
Single‐crystal growth of 4‐hydroxy‐3‐methoxy benzaldehyde (vanillin), an excellent molecular nonlinear optical (NLO) material, from the melt using the Bridgman technique is reported for the first time. Differential thermal analysis experiments indicated that the substance melts congruently at 81 °C. A precise temperature profile plot of the resistive furnace used was measured using a simple PC‐based time–temperature data logging system. Powder X‐ray diffraction analysis of the grown crystal revealed the crystal belongs to the monoclinic system. Fourier transform infrared spectra were used to assign various modes and identify the functional groups. The crystal exhibited a wide window of transmission unlike other organic NLO crystals. The optical second harmonic generation conversion efficiency of vanillin was determined using the Kurtz powder technique. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)