scholarly journals Structural, spectral, electrical, Z-scan and HOMO LUMO studies on new 2-amino-6-methylpyridinium 2-hydroxybenzoate crystal

2018 ◽  
Vol 36 (4) ◽  
pp. 537-546 ◽  
Author(s):  
B. Punithaveni ◽  
K. Thilagavathy ◽  
N. Muthukumarasamy ◽  
D. Nithyaprakash ◽  
M. Saravanabhavan
Keyword(s):  
Room Temperature ◽  
Grown Crystal ◽  
Xrd Analysis ◽  
Growth Technique ◽  
Powder Xrd Analysis ◽  
Ft Ir ◽  
Crystalline Nature ◽  
Ir Study ◽  
Homo Lumo ◽  
Solution Growth Technique

AbstractNew organic single crystals of 2-amino-6-methylpyridinium 2-hydroxybenzoate (2A6M2H) were grown by slow evaporation solution growth technique at room temperature. The grown crystal structure was studied using single crystal XRD. Crystalline nature and phases were confirmed by powder XRD analysis. FT-IR study was used to identify the functional groups present in the compound. UV-Vis study revealed that the lower cut off wavelength of the crystal is at 350 nm. The dielectric studies indicated the low value of dielectric loss at high frequency. Mechanical properties of the crystals were studied using Vickers microhardness test. The Z-Scan studies were conducted for the crystal using He–Ne laser.

scholarly journals Growth, electrical, thermal, mechanical and etching studies on 4-chloroanilinium hydrogen (2R, 3R)-tartrate monohydrate-an organic NLO single crystal

2019 ◽  
Vol 37 (3) ◽  
pp. 310-316
Author(s):  
R. Sivakumar ◽  
V. Nadaraj
Keyword(s):  
Single Crystal ◽  
Second Harmonic ◽  
Thermal Analyses ◽  
Visible Region ◽  
Xrd Analysis ◽  
Monoclinic System ◽  
Second Harmonic Generation Efficiency ◽  
Growth Technique ◽  
Powder Xrd Analysis ◽  
Ft Ir

AbstractAn organic single crystal of 4-chloroanilinium hydrogen (2R,3R)-tartrate monohydrate (4CAHT) was grown by slow evaporation solution growth technique at room temperature. Single crystal XRD study confirmed that the crystal belongs to monoclinic system with the space group P21. Powder XRD analysis confirmed the crystalline nature of the compound. The presence of various functional groups in the compound was revealed by FT-IR analysis. UV studies showed the absence of absorption in the entire visible region. To determine the thermal stability of the grown crystals it was subjected to thermogravimetric and differential thermal analyses. Microhardness and etching studies were also carried out for the crystal. The powder second harmonic generation efficiency of 4CAHT was tested by Kurtz and Perry powder technique and the relative SHG efficiency of 4CAHT was found to be 1.44 times greater than that of standard KDP.

scholarly journals Growth, spectroscopic, electrical and mechanical studies on hexamethylenetetramine succinate crystal: a new third harmonic generation material

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
S. Balaprabhakaran ◽  
J. Chandrasekaran ◽  
B. Babu ◽  
R. Thirumurugan ◽  
K. Anitha
Keyword(s):  
Grown Crystal ◽  
Third Order ◽  
Monoclinic System ◽  
Nonlinear Optical Susceptibility ◽  
Growth Technique ◽  
Third Harmonic ◽  
Optical Susceptibility ◽  
Ft Ir ◽  
Optical Behavior ◽  
Solution Growth Technique

AbstractHexamethylenetetramine succinate was synthesized and good quality single crystals with the size of 14 mm × 6 mm × 4 mm were grown by the slow evaporation solution growth technique at room temperature. The single crystal XRD revealed that the grown crystal belongs to the monoclinic system with the space group of P21/c. The presence of functional groups in the crystal was identified using FT-IR technique. The optical behavior was examined through UV-Vis-NIR studies. The photoconductivity study exhibited the positive photoconductivity nature of the grown crystal. Microhardness studies revealed the soft nature of the crystal. The nonlinear refractive index (n2), nonlinear absorption coefficient (β) and third order nonlinear optical susceptibility χ(3) of the crystals were measured by Z-scan studies.

GROWTH, OPTICAL AND MAGNETIC PROPERTIES OF Co-DOPED TiO2 CRYSTAL

2011 ◽  
Vol 04 (03) ◽  
pp. 265-269 ◽  
Author(s):  
NAIFENG ZHUANG ◽  
RONGFENG WANG ◽  
XIAOLIN HU ◽  
CAIGEN SONG ◽  
BIN ZHAO ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Room Temperature ◽  
Grown Crystal ◽  
Reverse Flow ◽  
Optical Transmittance ◽  
Xrd Analysis ◽  
Rutile Phase ◽  
Czochralski Growth ◽  
Optical And Magnetic Properties ◽  
Co Doped

Co -doped TiO2 crystals (Co:TiO2) were grown by Czochralski growth (CZ) method and the edge-defined film-fed growth (EFG) method, respectively. Therein, EFG was an effective method to grow a higher quality Co:TiO2 crystal without the reverse flow of the melt. This as-grown crystal reaches a larger dimension of 10 mm × 15 mm × 18mm. XRD analysis confirms that as-grown crystal is isostructural with TiO2 rutile phase. Moreover, this crystal has ferromagnetism at room temperature and the magnetic moment of Co ion is 1.25 × 10-2 μB/Co . After annealed at 1273 K, Co:TiO2 crystal enhances obviously its optical transmittance, while this crystal shows diamagnetism due to the disappearance of the ferromagnetic signal.

scholarly journals Growth and Spectral Characterization of L-Valine Zinc Acetate Single Crystal

2021 ◽  
Vol 9 (VI) ◽  
pp. 2691-2698
Author(s):  
A. Ruby
Keyword(s):  
Single Crystal ◽  
Zinc Acetate ◽  
Grown Crystal ◽  
Spectral Studies ◽  
X Ray Diffraction ◽  
Growth Technique ◽  
Cell Parameters ◽  
Hardness Values ◽  
Solution Growth Technique

L-Valine zinc acetate (LVZA) was synthesized and its solubility was estimated in the solvent of double distilled water. Single crystals of LVZA were grown by slow evaporation solution growth technique. The cell parameters were obtained by single crystal X-ray diffraction study. Functional groups of LVZA were identified by FTIR analysis. UV-vis-NIR spectral studies showed the optical nature of LVZA. Kurtz powder technique revealed the SHG efficiency of LVZA. Thermal properties of the grown LVZA crystal were studied from TGA/ DTA and DSC spectrum. Vickers’s mechanical hardness values were found for the grown crystal.

Solution Growth and Crystallinity Characterization of Bulk 6H-SiC

2010 ◽  
Vol 645-648 ◽  
pp. 33-36 ◽  
Author(s):  
Nobuyoshi Yashiro ◽  
Kazuhiko Kusunoki ◽  
Kazuhito Kamei ◽  
Akihiro Yauchi
Keyword(s):  
Grown Crystal ◽  
Solution Growth ◽  
Growth Technique ◽  
Rocking Curve ◽  
Long Time ◽  
Crystal Seed ◽  
Koh Etching ◽  
Light Green ◽  
Solution Growth Technique

The stable long time growth with the use of Si -C-Ti ternary solution was realized　by improving the thermal condition during the growth. We have succeeded in obtaining a maximum 10 mm thick bulk 6H-SiC crystal, which is the largest bulk crystal ever obtained by the solution growth technique. The obtained crystal was free of cracks and exhibited a homogeneous light green color. The crystallinity of the grown crystal was characterized by X-ray rocking curve measurements using (0006) reflection and by the molten KOH etching. The mapping of the full width at half maximum (FWHM) revealed the average FWHM around 30 arc seconds and the minimal FWHM under 16 arc seconds. The etch pit density (EPD) was typically in the range between 104 and 105 cm-2, which was comparable to that of the crystal seed.

The role of platinum on the NOx storage and desorption behavior of ceria: An online FT-IR study combined with in situ Raman and UV-Vis spectroscopy

2020 ◽  
Author(s):  
Anastasia Filtschew ◽  
Pablo Beato ◽  
Søren Birk Rasmussen ◽  
Christian Hess
Keyword(s):  
Gas Phase ◽  
Phase Analysis ◽  
Room Temperature ◽  
Storage Mechanism ◽  
In Situ Raman ◽  
Vis Spectroscopy ◽  
Ft Ir ◽  
Ir Study

The role of platinum on the room temperature NOx storage mechanism and the NOx desorption behavior of ceria was investigated by combining online FT-IR gas-phase analysis with in situ Raman...

FT-IR Spectroscopic and XRD Studies on Tris-Thiourea Strontium Chloride Single Crystals

2011 ◽  
Vol 8 (1) ◽  
pp. 201-204
Author(s):  
H. O. Jethva ◽  
R. R. Hajiyani
Keyword(s):  
Single Crystals ◽  
Xrd Analysis ◽  
Wave Number ◽  
Strontium Chloride ◽  
Orthorhombic Crystal ◽  
Orthorhombic Crystal Structure ◽  
Number Range ◽  
Aqueous Solvent ◽  
Powder Xrd Analysis ◽  
Ft Ir

There are various nonlinear optical materials having crystalline nature and find various applications in science and technology. Tris-thiourea strontium chloride was synthesized and single crystals were grown by the slow solvent evaporation technique using aqueous solvent. The grown crystals were characterized by Fourier Transform Infrared Spectroscopy (FT-IR), and X-ray diffraction analysis (XRD). The FT-IR spectra of these crystals were recorded in the wave number range 400-4000 cm-1 which reveals the presence of various functional groups. The powder XRD analysis suggested orthorhombic crystal structure.

Optical, dielectric & ferroelectric studies on amino acids doped TGS single crystals

RSC Advances ◽  
2016 ◽  
Vol 6 (40) ◽  
pp. 33686-33694 ◽  
Author(s):  
P. R. Deepthi ◽  
J. Shanthi
Keyword(s):  
Amino Acids ◽  
Amino Acid ◽  
Single Crystals ◽  
Room Temperature ◽  
Solution Growth ◽  
Slow Evaporation ◽  
Growth Technique ◽  
Optical Dielectric ◽  
Solution Growth Technique

Pure TGS and amino acid (l-arginine, l-histidine and l-alanine) doped TGS crystals were grown by a slow evaporation solution growth technique at room temperature.

Growth, physicochemical and quantum chemical investigations on 2-amino 5-chloropyridinium 4-carboxybutanoate – an organic crystal for biological and optoelectronic device applications

RSC Advances ◽  
2016 ◽  
Vol 6 (112) ◽  
pp. 110884-110897 ◽  
Author(s):  
B. Babu ◽  
J. Chandrasekaran ◽  
B. Mohanbabu ◽  
Yoshitaka Matsushita ◽  
M. Saravanakumar
Keyword(s):  
Single Crystals ◽  
Quantum Chemical ◽  
Room Temperature ◽  
Optoelectronic Device ◽  
Solution Growth ◽  
Slow Evaporation ◽  
Growth Technique ◽  
Optically Transparent ◽  
Device Applications ◽  
Solution Growth Technique

Optically transparent organic single crystals of 2-amino 5-chloropyridinium 4-carboxybutanoate (2A5C4C) with sizes of 7 × 4 × 2 mm3 were grown by a slow evaporation solution growth technique at room temperature using methanol solvent.

scholarly journals Magnetite-Functionalized Horse Dung Humic Acid (HDHA) for the Uptake of Toxic Lead(II) from Artificial Wastewater

2021 ◽  
Vol 2021 ◽  
pp. 1-15
Author(s):  
Rahmat Basuki ◽  
Bambang Rusdiarso ◽  
Sri Juari Santosa ◽  
Dwi Siswanta
Keyword(s):  
Humic Acid ◽  
Xrd Analysis ◽  
Desorption Process ◽  
X Ray ◽  
Ft Ir ◽  
Magnetic Strength ◽  
The Stability ◽  
Ir Study ◽  
Average Size ◽  
Adsorption Rates

Magnetite-functionalized horse dung humic acid (HDHA) has been successfully prepared by the coprecipitation method, and the as-prepared adsorbent (MHDHA) has been applied as an easy-handling adsorbent for toxic Pb(II) in artificial wastewater. The MHDHA was characterized by Fourier transform-infrared spectroscopy (FT-IR), X-ray powder diffraction (XRD), transmission electron microscopy (TEM), energy dispersive X-ray (EDX), and vibrating sample magnetometer (VSM). The FT-IR study showed that the MHDHA had the characteristics peaks of HA and Fe-O stretching. The XRD analysis revealed that the MHDHA had the 2 θ characteristic for magnetite. The TEM image and EDX analysis exhibited that the MHDHA with an average size of ∼14 nm was partially aggregated and contained ( w / w ) 9.89% carbon, 2.89% nitrogen, and 32.74% oxygen based on functional groups of HDHA. The stability improvement of MHDHA was showed by decreasing HDHA dissolved from 95% to less than 30% at pH 12 after magnetite functionalization. The post-adsorption handling improvement was evidenced by easy and quick retraction by an external magnet with a 62.95 emu/g magnetic strength value. The adsorption capacities were influenced by the pH and ionic strength, whilst the adsorption rates were well simulated by the Ho pseudo-second-order model. The removal uptake of Pb(II) ions increased when the initial concentration was increased and fitted well with the Langmuir isotherm model when the monolayer adsorption capacity was 2.78 × 10 − 4   mol / g (equal to 57.64 mg/g). The value of Dubinin-Radushkevich adsorption energy ( E D − R ) found in this study was 14.78 kJ/mol, which implied that ion exchange is the main mechanism involved in the adsorption process. The regeneration studies of MHDHA show that there was no significant change in composition, morphology, crystallinity, and functional group after five consecutive cycles of the adsorption-desorption process.

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