Infrared and Raman studies of manganese dihydrogen phosphate dihydrate, Mn(H2PO4)2·2H2O. I: Region of the vibrations of the phosphate ions and external modes of the water molecules

Koleva, V.; Stefov, Viktor; Cahil, A.; Najdoski, Metodija; Šoptrajanov, Bojan; Engelen, B.; Lutz, H. D.

doi:10.1016/j.molstruc.2008.07.002

Cited by 34 publications

(14 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The well separated peaks of CDP nanoparticles at 2650, 2300 and 1650 cm -1 in the IR spectra can be assigned to the ABC bonds of OH. The strong absorption of the samples in the region 900-1200 cm -1 in the IR spectra can undoubtedly be assigned to the components of the PO 4 while the four bands at 1185, 1140, 1070 an 940 cm -1 are attributed to the P-O stretching modes in the H 2 PO 4 -anion that is compatible to reported data (Koleva et al 2009). The generated bond due to Cs…O-H is observed at 490 cm -1 .…”

Section: Is and Ftir Analysissupporting

confidence: 88%

See 1 more Smart Citation

Effect of surfactants in synthesis of CsH2PO4 as protonic conductive membrane

et al. 2011

View full text Add to dashboard Cite

Cesium dihydrogen phosphate (CDP) powders were synthesized by cetyltrimethylammoniumbromide (CTAB), polyoxyethylene-polyoxypropylene (F-68) and mixture of both surfactants F-68 : CTAB with two molar ratios 0⋅06 and 0⋅12 as surfactant solutions at room temperature. The synthesized CsH 2 PO 4 is characterized by ICP, XRD, TEM, SEM, FT-IR, BET and IS techniques. Based on the width of the (011) XRD diffraction peak and BET measurement, the average size of nanoparticles was ~ 10 nm in diameter, while the TEM images indicate smaller size than both techniques. The analysis reveals existence of P and Cs with mole ratio 1⋅02 ± 0⋅03 which is compatible to molar ratio CsH 2 PO 4 formula. The experimental results show that the conductivities increase in the order of CDP CTAB > CDP (F-68 : CTAB)0.12 > CDP (F-68:CTAB)0.06 > CDP F-68 . The sequence of increasing conductivity is in accordance with the ion exchange capacities of the samples that has direct proportional effect on the proton mobility of samples. Indeed CTAB as cationic surfactant shows the highest proton mobility in the as-obtained samples.

show abstract

Section: Is and Ftir Analysissupporting

confidence: 88%

“…For each OH bond, the O-H motions are known as ν (OH), δ (OH) and γ (OH) i.e. stretching O-H, in plane and out-of-plane bending P-O-H vibration, respectively (Koleva et al 2009). Due to the Fermi resonance between ν (OH) and overtones of the deformation modes δ (OH) and γ (OH) appear as the ABC structure.…”

Section: Is and Ftir Analysismentioning

confidence: 99%

Effect of surfactants in synthesis of CsH2PO4 as protonic conductive membrane

et al. 2011

View full text Add to dashboard Cite

show abstract

“…6, the Raman spectra of the metal (IV) phosphates, all of the phosphates had the band around 1,050 cm -1 which could be regarded as a m s (PO 2 ) vibration [21]. The symmetric (m s POP) vibration only for TiPO was observed at 703 cm -1 .…”

Section: Raman Spectroscopymentioning

confidence: 92%

Metal (IV) Phosphates as Solid Catalysts for Selective Dehydration of Sorbitol to Isosorbide

Zhang

et al. 2009

Catal Lett

View full text Add to dashboard Cite

Metal (IV) phosphates of tin, zirconium and titanium were used as catalysts for selective dehydration of sorbitol to isosorbide. Tin phosphate showed the highest selectivity to isosorbide with a moderate conversion. The deactivation rates of catalysts were fitted by an empirical Voorhies equation and the results showed tin phosphate had the lowest deactivation rate with the least values of m and n. Thermal analysis showed deactivation rate was in accordance with coke deposition. The acidity caused by functional groups of the catalysts was the direct factor for catalyst lifetime, which was evidenced by NH 3 -TPD, XRD, IR and Raman characterizations.

show abstract

“…For KDP aqueous solution, infrared vibration bands respectively at 1153, 1072, 946 and 855 cm −1 are assigned to stretching vibration modes of H 2 PO 4 − , i.e., v 1 (PO 4 ) and v 3 (PO 4 ), whereas no v 2 (PO 4 ) and v 4 (PO 4 ) bands appear because their IR band regions (310-540 cm −1 ) are beyond the measurement region of the ATR-IR spectrum. 25,26 As shown in Fig. 1, before the KDP crystal separates from the detectable liquid film, the intensity of v 1 (PO 4 ) at 946 cm −1 and v 3 (PO 4 ) at 1153 cm −1 decreases with increasing the ) n clusters approaches that of the KDP crystal, leading to the nucleation of KDP.…”

Section: Resultsmentioning

confidence: 89%