Variable Temperature Infrared Spectroscopy Investigations of Benzoic Acid Desorption from Sodium and Calcium Montmorillonite Clays

2015 ◽  
Vol 69 (12) ◽  
pp. 1381-1389 ◽  
Author(s):  
Tara M. Nickels ◽  
Audrey L. Ingram ◽  
Dalia K. Maraoulaite ◽  
Robert L. White
Keyword(s):  
Infrared Spectroscopy ◽  
Benzoic Acid ◽  
Variable Temperature ◽  
Montmorillonite Clays

Variable Temperature Infrared Spectroscopy Investigation of Benzoic Acid Interactions with Montmorillonite Clay Interlayer Water

2015 ◽  
Vol 69 (7) ◽  
pp. 850-856 ◽  
Author(s):  
Tara M. Nickels ◽  
Audrey L. Ingram ◽  
Dalia K. Maraoulaite ◽  
Robert L. White
Keyword(s):  
Infrared Spectroscopy ◽  
Benzoic Acid ◽  
Variable Temperature ◽  
Montmorillonite Clay ◽  
Interlayer Water ◽  
Clay Interlayer

scholarly journals New Volatile Perfluorinated Amidine–Carboxylate Copper(II) Complexes as Promising Precursors in CVD and FEBID Methods

Materials ◽  
2021 ◽  
Vol 14 (12) ◽  
pp. 3145
Author(s):  
Katarzyna Madajska ◽  
Iwona Barbara Szymańska
Keyword(s):  
Electron Microscopy ◽  
Mass Spectrometry ◽  
Electron Beam ◽  
Infrared Spectroscopy ◽  
Density Functional ◽  
Variable Temperature ◽  
Chemical Vapour ◽  
Thermal Decomposition Mechanism ◽  
Transmission Electron Microscopy Analysis ◽  
Reduced Pressure

In the present study, we have synthesised and characterised newly copper(II) complexes with the general formula [Cu2(NH2(NH=)CC2F5)2(µ–O2CCRF)4], where RF = CF3, C2F5, C3F7, C4F9. Infrared spectroscopy, mass spectrometry with electron ionisation (EI MS), and density-functional theory (DFT) calculations were used to confirm compounds’ composition and structure. The volatility of the compounds was studied using thermal analysis (TGA), EI MS mass spectrometry, variable temperature infrared spectroscopy (VT IR), and sublimation experiments. Research has revealed that these compounds are the source of metal carriers in the gas phase. The thermal decomposition mechanism over reduced pressure was proposed. TGA studies demonstrated that copper transfer to the gaseous phase occurs even at atmospheric pressure. Two selected complexes [Cu2(NH2(NH=)CC2F5)2(µ–O2CC2F5)4] and [Cu2(NH2(NH=)CC2F5)2(µ–O2CC3F7)4] were successful used as chemical vapour deposition precursors. Copper films were deposited with an evaporation temperature of 393 K and 453 K, respectively, and a decomposition temperature in the range of 573–633 K without the use of hydrogen. The microscopic observations made to investigate the interaction of the [Cu2(NH2(NH=)CC2F5)2(µ–O2CC2F5)4] with the electron beam showed that the ligands are completely lost under transmission electron microscopy analysis conditions (200 keV), and the final product is copper(II) fluoride. In contrast, the beam energy in scanning electron microscopy (28 keV) was insufficient to break all coordination bonds. It was shown that the Cu-O bond is more sensitive to the electron beam than the Cu-N bond.

Near Infrared Spectroscopy of Benzoic Acid Adsorbed on Montmorillonite

2010 ◽  
Vol 43 (4) ◽  
pp. 266-274 ◽  
Author(s):  
Longfei Lu ◽  
Jingong Cai ◽  
Ray L. Frost
Keyword(s):  
Infrared Spectroscopy ◽  
Benzoic Acid ◽  
Near Infrared Spectroscopy ◽  
Near Infrared
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