scholarly journals Synthesis of pure potassium pentaborate (KB5) from potassium dihydrogen phosphate (KH2PO4) and colemanite

2021 ◽  
Author(s):  
Özlem Karagöz ◽  
Soner Kuşlu
Keyword(s):  
Solution Method ◽  
Potassium Dihydrogen Phosphate ◽  
Dihydrogen Phosphate ◽  
X Ray Diffraction ◽  
Reaction Conditions ◽  
Potassium Dihydrogen ◽  
Ft Ir ◽  
Lower Temperature ◽  
The Cost ◽  
Sem Analyses

Abstract In this study, after specifying theoretical reaction conditions required for chemical reaction, potassium pentaborate (KB5) was synthesized from the potassium dihydrogen phosphate (KH2PO4) solution and the raw colemanite (Ca2B6O11.5H2O) ore. The slow evaporation solution method was used at 25 ℃. The effect of time (6-18 hours) on crystallization was studied. Synthesized minerals were characterized by X-ray diffraction (XRD), Fourier transform infrared (FT-IR), RAMAN spectroscopies, and scanning electron microscopy (SEM). The results according to the XRD, FT-IR, RAMAN, and SEM analyses proved that the synthesized product was the potassium pentaborate (KB5O8.4H2O) mineral having the ICSD: 96-026-1927 pdf code. As a result, the cost was reduced by using raw boron ore, colemanite and KB5 could be obtained in a shorter time and at a lower temperature.

INVESTIGATION ON THE PHYSICOCHEMICAL PROPERTIES OF NONLINEAR OPTICAL SINGLE CRYSTAL: 2-NAPHTHALENOL

2009 ◽  
Vol 23 (09) ◽  
pp. 1221-1227
Author(s):  
K. SELVARAJU ◽  
K. KIRUBAVATHI ◽  
S. KUMARARAMAN
Keyword(s):  
Single Crystal ◽  
Nonlinear Optical ◽  
Second Harmonic ◽  
Potassium Dihydrogen Phosphate ◽  
Wavelength Region ◽  
Dihydrogen Phosphate ◽  
X Ray Diffraction ◽  
Second Harmonic Generation Efficiency ◽  
Growth Technique ◽  
Potassium Dihydrogen

Single crystals of 2-Naphthalenol (2N), new organic nonlinear optical (NLO) material, have been grown by slow evaporation solution growth technique at room temperature. The crystal system has been confirmed from the single crystal X-ray diffraction analysis. The functional groups were identified using FTIR spectroscopy. UV-vis-NIR spectrum showed absence of absorption in the wavelength region 400–1400 nm. The second harmonic generation efficiency is two times higher than that of standard potassium dihydrogen phosphate (KDP).

scholarly journals Crystal Structure of L-Histidinium 2-Nitrobenzoate

2012 ◽  
Vol 2012 ◽  
pp. 1-6 ◽  
Author(s):  
Subramanian Natarajan ◽  
Kalimuthu Moovendaran ◽  
Jeyaperumal Kalyana Sundar ◽  
Krishnan Ravikumar
Keyword(s):  
Molecular Structure ◽  
Crystal Structure ◽  
Nonlinear Optical ◽  
Second Harmonic ◽  
Potassium Dihydrogen Phosphate ◽  
Dihydrogen Phosphate ◽  
X Ray Diffraction ◽  
Potassium Dihydrogen ◽  
X Ray ◽  
Shg Efficiency

A new nonlinear optical organic compound, namely, L-histidinium 2-nitrobenzoate (abbreviated as LH2NB (I); ([C6H10N3O2]+ [C7H4NO4]−)), was synthesized. The molecular structure of LH2NB (I) was elucidated using single crystal X-ray diffraction technique. The second harmonic generation (SHG) efficiency of this compound is about two times that of the standard potassium dihydrogen phosphate crystals.

scholarly journals Single-Crystalline Fibers of Deuterated Potassium Dihydrogen Phosphate

Crystals ◽  
2020 ◽  
Vol 10 (6) ◽  
pp. 511
Author(s):  
Xueni Liu ◽  
Yan Ren ◽  
Cheng Qian Zhang ◽  
Bo Wang ◽  
Sheng Qing Xia
Keyword(s):  
Second Harmonic ◽  
Potassium Dihydrogen Phosphate ◽  
Guided Wave ◽  
Supersaturated Solution ◽  
Deuterium Content ◽  
Dihydrogen Phosphate ◽  
X Ray Diffraction ◽  
Potassium Dihydrogen ◽  
Single Crystalline ◽  
Tetragonal Crystal

Single-crystalline fibers have distinct structures and optical properties comparing with the bulk crystals. In this article, two types of single-crystalline fibers of deuterated potassium dihydrogen phosphate (K(H1−xDx)2PO4, DKDP) are obtained by rapid growth in room-temperature supersaturated solution. X-ray diffraction analysis reveals that these DKDP single-crystalline fibers belong to tetragonal (I-42d) and monoclinic (P21/c) phases, respectively. The crystal structure of the tetragonal DKDP single-crystalline fiber is identical to that of the bulk DKDP tetragonal crystal reported. The lattice parameters of the monoclinic DKDP fiber (with the deuterium content of 55%) are a = 14.6571 Å, b = 4.5187 Å, c = 18.6962 Å, and β = 108.030°, which is a new crystal phase of DKDP. The monoclinic DKDP single-crystalline fiber is metastable at the present experimental condition and readily transit to the corresponding DKDP tetragonal phase in solution and in solid by grinding. The optical experiment shows that the highly deuterated tetragonal DKDP single-crystalline fiber possesses excellent optical guided-wave and effective second-harmonic generation properties. DKDP single-crystalline fibers are expected to be the suitable candidates for fabrication of the miniaturized nonlinear optical devices.

X-ray diffraction studies of potassium dihydrogen phosphate (KDP) crystal surfaces

1999 ◽  
Vol 205 (1-2) ◽  
pp. 202-214 ◽  
Author(s):  
S.A. de Vries ◽  
P. Goedtkindt ◽  
W.J. Huisman ◽  
M.J. Zwanenburg ◽  
R. Feidenhans'l ◽  
...  
Keyword(s):  
Potassium Dihydrogen Phosphate ◽  
Dihydrogen Phosphate ◽  
X Ray Diffraction ◽  
Crystal Surfaces ◽  
Kdp Crystal ◽  
Potassium Dihydrogen ◽  
X Ray

scholarly journals Growth and study of 4-sulfobenzenaminium potassium dihydrogenphosphate for mechanical, dielectric and photonics applications

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
E. Vinoth ◽  
S. Vetrivel ◽  
S. Gopinath ◽  
R.U. Mullai ◽  
R. Aruljothi ◽  
...  
Keyword(s):  
Potassium Dihydrogen Phosphate ◽  
Optical Transmittance ◽  
Dihydrogen Phosphate ◽  
The Novel ◽  
X Ray Diffraction ◽  
Stiffness Constant ◽  
Potassium Hydrogen ◽  
Ft Ir ◽  
Dta Curves

Abstract This article describes the growth and characterization of 4-sulfobenzenaminium potassium hydrogen phosphate (SPH) sulphanilic acid with potassium dihydrogen phosphate (KDP) doped semi-organic single crystals. The crystal was grown by the slow evaporation method. Examination of the crystalline nature of the sample was carried out by single crystal X-ray diffraction and it confirmed that the sample crystallizes in orthorhombic structure in the centrosymmetric space group P212121. The optical transmittance behavior was tested by UV-Vis spectral analysis. FT-IR spectral investigations have been carried out to indicate the presence of functional groups. The chemical structure of the compound was established by 1H and 13C NMR spectra. The SHG efficiency of the powdered SPH crystal is around 1.7 times that of pure KDP. The grown crystal was stable up to 270 °C as observed from TGA and DTA curves. The microhardness test was carried out to study the load dependency of hardness. The result of this study indicates that SPH crystal is a malleable material. From the hardness values, the stiffness constant and yield strength were calculated. The dielectric response of the novel crystal was studied in the frequency range of 50 Hz to 5 MHz at various temperatures. By employing FE-SEM, the surface morphology and the particle size of the crystal were assessed.

Synthesis, Crystal Growth, Crystal Arrangement, Optical, Thermal, NLO and Biological Investigations of Heterocyclic Compounds of N-(1,3-benzothiazol-2-yl)benzamide and N-(1,3-benzothiazol-2-yl)-2-fluorobenzamide

2021 ◽  
Vol 6 (5) ◽  
pp. 181-189
Author(s):  
C. Raveendiran ◽  
P. Prabukanthan
Keyword(s):  
Single Crystals ◽  
Potassium Dihydrogen Phosphate ◽  
Dihydrogen Phosphate ◽  
X Ray Diffraction ◽  
1H And 13C Nmr ◽  
Antibacterial And Antifungal Activities ◽  
Ft Ir ◽  
Crystal Arrangement ◽  
Antibacterial And Antifungal ◽  
Anti Fungal

Heterocyclic organic nonlinear optical materials of N-(1,3-benzothiazol-2-yl)benzamide [2-BTBA] and N-(1,3-benzothiazol-2-yl)-2-fluorobenzamide [2-BTFBA] were orchestrated by benzoylation of 2-aminobenzothiazole utilizing subbed benzoyl chloride. The orchestrated mixtures2-BTBA and 2-BTFBA molecular ion peaks at 253.9 & 272 were affirmed by GC-MS. The grown single crystals of 2-BTBA and 2-BTFBA were developed by slow evaporation method at room temperature with a combination of ethyl acetate & methanol as dissolvable. The X-ray diffraction investigations of equally 2-BTBA & 2-BTFBA crystal have a monoclinic framework with space group P21/n individually. The FT-IR spectra of 2-BTBA and 2-BTFBA show absorption peaks at 1670 and 1660 cm-1, indicating the presence of carbonyl functional group vibration modes in the molecules. UV–Vis spectra show a awesome absorbance band at 303 & 300 nm for 2-BTBA and 2-BTFBA molecules, respectively. The number of protons and carbons were predicted using 1H and 13C NMR spectrum studies. TGA and DTA analyses confirmed the various stages of disintegration of the produced crystals, and they are thermally stable up to 403 K and 333 K for 2-BTBA and 2-BTFBA, respectively. The zone of hindrance method was used to test the antibacterial and antifungal activities of produced single crystals using amphotericin-B and ciprofloxacin as standards. The outcomesprove that the incorporated mixtures display prevalent anti-fungal and antibacterial activity. The non-linear efficiency was affirmed by Kurtz- Perry concentrates trategy for 2-BTBA and 2-BTFBA crystals with the SHG proficiency 2.28 and 2.83 times more prominent than that of potassium dihydrogen phosphate [KDP].

MAGIC-LC/FT-IR Spectrometry with Buffered Solvent Systems

1990 ◽  
Vol 44 (1) ◽  
pp. 8-13 ◽  
Author(s):  
R. M. Robertson ◽  
J. A. de Haseth ◽  
R. F. Browner
Keyword(s):  
Mobile Phase ◽  
Potassium Dihydrogen Phosphate ◽  
Dihydrogen Phosphate ◽  
Reference Spectrum ◽  
Ir Spectrometry ◽  
Potassium Dihydrogen ◽  
Aerosol Generator ◽  
Mobile Phases ◽  
Potassium Hydrogen ◽  
Ft Ir

The first demonstration of identifiable infrared (IR) spectra obtained from buffered (volatile and nonvolatile buffers) mobile phases using the Monodisperse Aerosol Generator Interface for Combining Liquid Chromatography with Fourier Transform Infrared (MAGIC-LC/FT-IR) spectrometry is described. Ammonium acetate, a volatile buffer, was used to buffer an 80:20 acetonitrile: water mobile phase to pH 5.0. Caffeine was deposited from this buffered mobile phase, and the spectrum was used as a reference to compare with caffeine spectra obtained from nonvolatile buffered mobile phases. The two nonvolatile buffers used were potassium hydrogen phthalate (KHP) and potassium dihydrogen phosphate (KH2PO4). The KH2PO4 was used to buffer an acetonitrile:water mobile phase and a methanol:water mobile phase, whereas the KHP buffer was used only in a methanoh:water mobile phase. Samples of caffeine were deposited from each of the above buffer systems along with the nonvolatile buffer. Infrared spectra of caffeine were obtained by spectral subtraction of previously stored buffer spectra from the caffeine:buffer spectra. The resulting spectra were identical to a caffeine reference spectrum.

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