scholarly journals Infrared and Raman Spectroscopy of Ammoniovoltaite, (NH4)2Fe2+5Fe3+3Al(SO4)12(H2O)18

Minerals ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 781
Author(s):  
Anastasia V. Sergeeva ◽  
Elena S. Zhitova ◽  
Anton A. Nuzhdaev ◽  
Andrey A. Zolotarev ◽  
Vladimir N. Bocharov ◽  
...  
Keyword(s):  
Hydrogen Bond ◽  
Raman Spectroscopy ◽  
Hydrogen Bonding ◽  
Raman Spectrum ◽  
Local Symmetry ◽  
Geothermal Field ◽  
Infrared And Raman Spectra ◽  
Infrared And Raman Spectroscopy ◽  
Related Compounds

Ammoniovoltaite, (NH4)2Fe2+5Fe3+3Al(SO4)12(H2O)18, is a complex hydrated sulphate of the voltaite group that has been recently discovered on the surface of the Severo-Kambalny geothermal field (Kamchatka, Russia). Vibrational spectroscopy has been applied for characterization of the mineral. Both infrared and Raman spectra of ammoniovoltaite are characterized by an abundance of bands, which corresponds to the diversity of structural fragments and variations of their local symmetry. The infrared spectrum of ammoniovoltaite is similar to that of other voltaite-related compounds. The specific feature related to the dominance of the NH4 group is its ν4 mode observed at 1432 cm−1 with a shoulder at 1510 cm−1 appearing due to NH4 disorder. The Raman spectrum of ammoniovoltaite is basically different from that of voltaite by the appearance of an intensive band centered at 3194 cm−1 and attributed to the ν3 mode of NH4. The latter can serve as a distinctive feature of ammonium in voltaite-group minerals in resemblance to recently reported results for another NH4-mineral—tschermigite, where ν3 of NH4 occurs at 3163 cm−1. The values calculated from wavenumbers of infrared bands at 3585 cm−1, 3467 cm−1 and 3400 cm−1 for hydrogen bond distances: d(O···H) and d(O···O) correspond to bonding involving H1 and H2 atoms of Fe2+X6 (X = O, OH) octahedra. The infrared bands observed at 3242 cm−1 and 2483 cm−1 are due to stronger hydrogen bonding, that may refer to non-localized H atoms of Al(H2O)6 or NH4.

Characterization of Passive Films Using Infrared and Raman Spectroscopy

1978 ◽  
Author(s):  
R. Heidersbach ◽  
C. Brown ◽  
R. Thibeau ◽  
A. Goldfarb
Keyword(s):  
Raman Spectroscopy ◽  
Passive Films ◽  
Infrared And Raman Spectroscopy

Hydrogen bond-like equatorial C–H⋯O interactions in aqueous 1,3-dioxane: A combined high-pressure infrared and Raman spectroscopy study

2005 ◽  
Vol 410 (1-3) ◽  
pp. 42-48 ◽  
Author(s):  
Hai-Chou Chang ◽  
Jyh-Chiang Jiang ◽  
Ching-Wei Chuang ◽  
Jui-San Lin ◽  
Wen-Wei Lai ◽  
...  
Keyword(s):  
Hydrogen Bond ◽  
Raman Spectroscopy ◽  
High Pressure ◽  
Spectroscopy Study ◽  
Infrared And Raman Spectroscopy

Improved syntheses, and structural and electronic characterization of carboxamide-substituted TpCONHPh,Meand TpCONHt-Bu,Meligands

2013 ◽  
Vol 69 (9) ◽  
pp. 947-953 ◽  
Author(s):  
Eric R. Sirianni ◽  
Glenn P. A. Yap ◽  
Eser S. Akturk ◽  
Klaus H. Theopold
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonding ◽  
Spectroscopic Properties ◽  
Carbonyl Complexes ◽  
Strong Electron ◽  
Complex Molecules ◽  
Solvent Molecules ◽  
Related Compounds

Improvements in the syntheses of the carboxamide-substituted tris(pyrazolyl)borate ligands TpCONHPh,Me[tris(3-anilinocarbonyl-5-methylpyrazol-1-yl)borate] and TpCONHt-Bu,Me[tris(3-tert-butylaminocarbonyl-5-methylpyrazol-1-yl)borate] are reported. Their TlIsalts, namely [tris(3-anilinocarbonyl-5-methylpyrazol-1-yl-κN2)borato]thallium(I), [Tl(C33H31BN9O3)], (II), and [tris(3-tert-butylaminocarbonyl-5-methylpyrazol-1-yl-κN2)borato]thallium(I), [Tl(C27H43BN9O3)], (III), as well as the CuIcarbonyl complexes (TpCONHPh,Me)Cu(CO), namely carbonyl[tris(3-anilinocarbonyl-5-methylpyrazol-1-yl-κN2)borato]copper(I) tetrahydrofuran trisolvate, [Cu(C33H31BN9O3)(CO)]·3C4H8O, (IV), and (TpCONHt-Bu,Me)Cu(CO), namely carbonyl[tris(3-tert-butylaminocarbonyl-5-methylpyrazol-1-yl-κN2)borato]copper(I) tetrahydrofuran hemisolvate, [Cu(C27H43BN9O3)(CO)]·0.5C4H8O, (V), have been prepared. Their spectroscopic properties and structures are compared with those of related compounds. The molecules of (II)–(V) show hydrogen bonding to either solvent molecules or neighboring complex moleculesviaamide groups. The title compounds feature the ability to engage other ligands in hydrogen bonding and they show strong electron-withdrawing character. Compound (V) displays voids ofca800 Å3in the crystal structure.

Initial hydrogen-bonding dynamics of photoexcited coumarin in solution with femtosecond stimulated Raman spectroscopy

2016 ◽  
Vol 4 (14) ◽  
pp. 2954-2963 ◽  
Author(s):  
Fangyuan Han ◽  
Weimin Liu ◽  
Liangdong Zhu ◽  
Yanli Wang ◽  
Chong Fang
Keyword(s):  
Hydrogen Bond ◽  
Raman Spectroscopy ◽  
Hydrogen Bonding ◽  
Bond Breaking ◽  
Coumarin 102 ◽  
Hydrogen Bonding Dynamics ◽  
Dye Molecule ◽  
Stimulated Raman

The ultrafast hydrogen bond breaking and reformation dynamics at the carbonyl site of a coumarin 102 dye molecule in ethanol is captured by femtosecond stimulated Raman spectroscopy (FSRS) on the femtosecond and picosecond timescales.

Vibrational Spectra of Trifluorothiolacetic Acid: Hydrogen Bonding and Conformational Effects

1973 ◽  
Vol 27 (6) ◽  
pp. 440-443 ◽  
Author(s):  
G. A. Crowder
Keyword(s):  
Hydrogen Bond ◽  
Hydrogen Bonding ◽  
Raman Spectrum ◽  
Solid State ◽  
Vibrational Assignment ◽  
Hydrogen Bond Energy ◽  
Solid States ◽  
Rotational Isomers ◽  
Conformational Effects ◽  
Solid State Spectrum

Infrared spectra were obtained for trifluorothiolacetic acid in the vapor, liquid, and solid states, and the Raman spectrum of the liquid was obtained. The spectra have been interpreted in terms of two rotational isomers being present in the liquid state, with the hydrogen atom being either eclipsed with or trans to the oxygen. The solid state spectrum was interpreted to be due to a hydrogen-bonded dimer. The absence of the hydrogen bonding in the liquid indicates a hydrogen bond energy of only a few hundred calories per mole. A vibrational assignment is proposed.

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