Vibrational Analysis of Copper Chloride Dihydrate

Fifer, Robert A.; Schiffer, J.

doi:10.1063/1.1670780

Cited by 17 publications

(6 citation statements)

References 9 publications

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“…These values correspond to the ones already published, e.g. The band at 3242 cm −1 is assigned to the overtone of the bending modes . The structure of CaCl 2 · 6H 2 O resolved by XRD indicates a hexagonal structure with two different crystallographic positions for the oxygen atoms of the water molecules.…”

Section: Resultssupporting

confidence: 87%

“…So in the 3200–3500 cm −1 region, there are five frequencies, in contrast with the four bands that appear in the bending. A possible explanation is that the band at 3383 cm −1 corresponds to a combination band between the overtone of the bending mode plus a lattice mode 2υ 2 + υ l . Other possible explanation for one extra band among those at 3411 cm −1 , 3406 cm −1 and 3399 cm −1 could be the result of intermolecular coupling.…”

Section: Resultsmentioning

confidence: 99%

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Reference Raman spectra of synthesized CaCl₂ · nH₂O solids (n = 0, 2, 4, 6)

Uriarte

Dubessy

Boulet

et al. 2015

J Raman Spectroscopy

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The CaCl 2 · nH 2 O solids with n = 0, 1, 2, 4, 6 are of importance in fluid geochemistry in both the Earth and Mars. Their unambiguous identification is thus essential. Raman spectroscopy either in laboratory or in the robotic planet exploration with Raman spectrometer may provide such identification. Published Raman spectra of these minerals were from either unknown, or poorly known or simply wrong samples. The aim of this work is to provide Raman spectra over the 100-4000 cm À1 spectral range for these solids synthesized in capillary and unambiguously identified by X-ray diffraction. Raman spectra were collected at room temperature and at À172°C. First interpretations of the Raman spectra of the OH stretching and bending modes of water and of the lowwavenumber bands (100-1000 cm À1 ) are given according to the knowledge of their structure. The main Raman bands are given for their identification and will be helpful for ExoMars surface exploration in the next ESA-Exomars mission in 2016-2018.

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Section: Resultssupporting

confidence: 87%

Section: Resultsmentioning

confidence: 99%

Reference Raman spectra of synthesized CaCl₂ · nH₂O solids (n = 0, 2, 4, 6)

Uriarte

Dubessy

Boulet

et al. 2015

J Raman Spectroscopy

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“…This can be taken to indicate that weak hydrogen bonds between water molecules and perchlorate ions, similar to those in LiCI04.3H20, occur in NaC10,-H20 and BaCI04.3H,0. These stretching frequencies are unusually high for crystalline hydrates, the most common frequency range being 3300-3500 cm-' for OH and 2440-2560 cm-' for OD (5,16,(27)(28)(29)(30). These frequencies correspond closely to the high-frequency peaks in the spectra of HDO in aqueous solutions of perchlorate ions (4,(7)(8)(9)(10), showing that very similar weak hydrogen bonds occur in the crystalline hydrates and in solution.…”

Section: Methodsmentioning

confidence: 99%

Infrared studies of water in crystalline hydrates: NaClO₄•H₂O, LiClO₄•3H₂O, and Ba(ClO₄)₂•3H₂O

Brink¹,

Falk²

1970

Can. J. Chem.

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Infrared spectra of undeuterated and partially deuterated NaC104.H20, LiC1O6.3H,O, and Ba(C104),.3H,0 were examined. Crystallographic data point to a weak hydrogen bond between water molecules and the perchlorate ions in LiC104. 3H,O. This is confirmed by the high HDO stretching frequencies for this compound. The nearly identical HDO stretching frequencies in LiC104.3H20, NaC1O4.H2O, Ba(C104)2.3H20, and in aqueous solutions of these salts show that similar weak hydrogen bonds occur in all three hydrates and in solution. The hydrogen bond energy is of the order of 2 kcal/mole. In all three compounds the water molecules are symmetric at room temperature. At -165" the water molecules become highly distorted in the sodium conlpound, slightly distorted in the barium compound, and remain undistorted in the lithium compound. Very narrow OD stretching bands are observed, showing that the hydrogen atom positions are ordered in all three hydrates.

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“…2b). The band seen at 3367 cm -1 is attributed to O-H stretching vibrations, while the band seen at 1582 cm -1 is related with O-H blending vibrations, both type vibrations being from the water molecules [28,29].…”

Section: Ftir Spectroscopymentioning

confidence: 99%

Release of copper complexes from a nanostructured sol–gel titania for cancer treatment

López

Ortiz-Islas²,

Guevara³

et al. 2015

J Mater Sci

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Copper complexes containing inorganic ligands were loaded on a functionalized titania (F-TiO 2 ) to obtain drug delivery systems. The as-received copper complexes and those released from titania were tested as toxic agents on different cancer cell lines. The sol-gel method was used for the synthesis and surface functionalization of the titania, as well as for loading the copper complexes, all in a single step. The resultant Cu/F-TiO 2 materials were characterized by several techniques. An ''in vitro'' releasing test was developed using an aqueous medium. Different concentrations (15.6-1000 lg mL -1 ) of each copper complex, those loaded on titania (Cu/F-TiO 2 ), functionalized titania, and cis-Pt as a reference material, were incubated on RG2, C6, U373, and B16 cancer cell lines for 24 h. The morphology of functionalized titania and the different Cu/F-TiO 2 materials obtained consists of aggregated nanoparticles, which generate mesopores. The amorphous phase (in dominant proportion) and the anatase phase were the structures identified through the X-ray diffraction profiles. These results agree with high-resolution transmission electron microscopy. Theoretical studies indicate that the copper compounds were released by a Fickian diffusion mechanism. It was found that independently of the copper complex and also the cell line used, low concentrations of each copper compound were sufficient to kill almost 100 % of cancer cells. When the cancer cells were treated with increasing concentrations of the Cu/ F-TiO 2 materials the number of survival cells decreased. Both copper complexes alone as well as those loaded on TiO 2 had higher toxic effect than cis-Pt.

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Vibrational Analysis of Copper Chloride Dihydrate

Cited by 17 publications

References 9 publications

Reference Raman spectra of synthesized CaCl₂ · nH₂O solids (n = 0, 2, 4, 6)

Reference Raman spectra of synthesized CaCl₂ · nH₂O solids (n = 0, 2, 4, 6)

Infrared studies of water in crystalline hydrates: NaClO₄•H₂O, LiClO₄•3H₂O, and Ba(ClO₄)₂•3H₂O

Release of copper complexes from a nanostructured sol–gel titania for cancer treatment

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Vibrational Analysis of Copper Chloride Dihydrate

Cited by 17 publications

References 9 publications

Reference Raman spectra of synthesized CaCl2 · nH2O solids (n = 0, 2, 4, 6)

Reference Raman spectra of synthesized CaCl2 · nH2O solids (n = 0, 2, 4, 6)

Infrared studies of water in crystalline hydrates: NaClO4•H2O, LiClO4•3H2O, and Ba(ClO4)2•3H2O

Release of copper complexes from a nanostructured sol–gel titania for cancer treatment

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Reference Raman spectra of synthesized CaCl₂ · nH₂O solids (n = 0, 2, 4, 6)

Reference Raman spectra of synthesized CaCl₂ · nH₂O solids (n = 0, 2, 4, 6)

Infrared studies of water in crystalline hydrates: NaClO₄•H₂O, LiClO₄•3H₂O, and Ba(ClO₄)₂•3H₂O