Crystal Structure, Vibrational, Optical, and Photoluminescence Analyses of Schiff Base 4-Bromo-N′-[(5-bromo-2-hydroxyphenyl)methylidene]benzohydrazide Single Crystals

Single crystals of 4-bromo- N ′-[(5-bromo-2-hydroxyphenyl)methylidene]benzohydrazide (4BMB) were grown using the slow evaporation method. The examination of the crystal structure through the utilization of single-crystal x-ray diffraction analysis revealed that the 4BMB crystal underwent crystalliza...

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Bibliographic Details
Published in:Journal of electronic materials 2024-12, Vol.53 (12), p.7937-7945
Main Authors: Arunagiri, C., Selvakumar, S., Rhoda, J. Christina, Karnan, C.
Format: Article
Language:English
Subjects:
Characterization and Evaluation of Materials
Chemistry and Materials Science
Chromaticity
Color temperature
Crystal growth
Crystal structure
Crystallization
Cut off wavelength
Electronics and Microelectronics
Emission spectra
Fourier transforms
Functional groups
Imines
Infrared analysis
Infrared spectra
Instrumentation
Materials Science
Optical and Electronic Materials
Organic light emitting diodes
Original Research Article
Photoluminescence
Raman spectra
Refractivity
Single crystals
Solid State Physics
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Summary:Single crystals of 4-bromo- N ′-[(5-bromo-2-hydroxyphenyl)methylidene]benzohydrazide (4BMB) were grown using the slow evaporation method. The examination of the crystal structure through the utilization of single-crystal x-ray diffraction analysis revealed that the 4BMB crystal underwent crystallization within the monoclinic crystal system, featuring a centrosymmetric space group denoted as Pn. Verification of the presence of anticipated functional groups was achieved through analysis of Fourier transform infrared and Raman spectra. The crystal demonstrated a wide optical bandgap of 5.87 eV with a cutoff wavelength of 222 nm. At 532 nm, the crystal exhibited transmittance of 63%, and refractive index and extinction coefficient values of 2.097 and 4.1827 × 10 −6 , respectively. Photoluminescence spectra revealed a prominent peak at 491 nm associated with blue-green emission. In addition, it exhibited strong emission at 430 nm. Additionally, confirmation of the blue emission of the crystal was obtained through the CIE color chromaticity coordinates diagram. The calculated correlated color temperature value of the crystal was 1753 K. The crystal exhibits essential properties that make it suitable for applications in organic light-emitting diodes. Graphical Abstract
ISSN:0361-5235
1543-186X
DOI:10.1007/s11664-024-11441-x