scholarly journals Accurate thermodynamic properties of gas phase hydrogen bonded complexes

2016 ◽  
Vol 18 (34) ◽  
pp. 23831-23839 ◽  
Author(s):  
Anne S. Hansen ◽  
Zeina Maroun ◽  
Kasper Mackeprang ◽  
Benjamin N. Frandsen ◽  
Henrik G. Kjaergaard
Keyword(s):  
Complex Formation ◽  
Thermodynamic Properties ◽  
Equilibrium Constant ◽  
Gas Phase ◽  
Accurate Determination ◽  
Enthalpy Of Complex Formation ◽  
Bonded Complexes ◽  
Hydrogen Bonded

The increase in temperature causes a decrease in equilibrium constant, which makes accurate determination of the enthalpy of complex formation possible.

Calorimetric Determination of the Equilibrium Constant and the Heat of Formation of Hydrogen Bonded Complexes

Nature ◽  
1968 ◽  
Vol 218 (5140) ◽  
pp. 461-462 ◽  
Author(s):  
D. NEERINCK ◽  
A. VAN AUDENHAEGE ◽  
L. LAMBERTS ◽  
P. HUYSKENS
Keyword(s):  
Equilibrium Constant ◽  
Heat Of Formation ◽  
Calorimetric Determination ◽  
Bonded Complexes ◽  
Hydrogen Bonded

Thermodynamic properties of gas-phase hydrogen-bonded complexes

1988 ◽  
Vol 88 (6) ◽  
pp. 827-841 ◽  
Author(s):  
L. A. Curtiss ◽  
M. Blander
Keyword(s):  
Thermodynamic Properties ◽  
Gas Phase ◽  
Bonded Complexes ◽  
Hydrogen Bonded

Spectroscopic investigations of hydrogen bonding interactions in the gas phase. II. The determination of the geometry and potential constants of the hydrogen-bonded heterodimer CH 3 CN • • • HF from its microwave rotational spectrum

1980 ◽  
Vol 370 (1741) ◽  
pp. 239-255 ◽  
Keyword(s):  
Hydrogen Bonding ◽  
Gas Phase ◽  
Spectroscopic Constants ◽  
Rotational Spectrum ◽  
Hydrogen Bonding Interactions ◽  
Isotopic Species ◽  
Microwave Rotational Spectrum ◽  
Vibration Rotation ◽  
Hydrogen Bonded

The microwave rotational spectrum of the hydrogen-bonded heterodimer CH 3 CN • • • HF has been identified and shown to be characteristic of a symmetric top. A detailed analysis of several rotational transitions for a variety of isotopic species gives the spectroscopic constants summarized in the following table: Rotational constants/MHz, vibration-rotation constants/MHz and vibrational separations/cm -1 of CH 3 CN • • • HF

Solvent effects in ultraviolet spectral studies of hydrogen bonding between phenol and N,N-dimethylacetamide

1967 ◽  
Vol 45 (18) ◽  
pp. 2033-2038 ◽  
Author(s):  
F. Takahashi ◽  
W. J. Karoly ◽  
J. B. Greenshields ◽  
N. C. Li
Keyword(s):  
Hydrogen Bonding ◽  
Magnetic Resonance ◽  
Complex Formation ◽  
Equilibrium Constant ◽  
Proton Magnetic Resonance ◽  
Mixed Solvent ◽  
Resonance Method ◽  
Spectral Studies ◽  
Magnetic Resonance Method ◽  
Hydrogen Bonded

Ultraviolet spectral studies of hydrogen bonding between phenol and N,N-dimethylacetamide (DMA) in several media are reported. The equilibrium constant for the formation of the phenol–DMA complex is strongly solvent dependent, varying from 295 1/mole in cyclohexane to 130 in CCl4 and 16 in CHCl3, all at 28°. The greatly reduced value in CHCl3 indicates that the measured equilibrium constant is only an apparent one which does not take into account the decrease in free DMA concentration resulting from hydrogen-bonded complex formation with the solvent acting as hydrogen donor. In CCl4/CHCl3 mixed solvent, in the range of [chloroform] = 0 to 1.227 M, the measured equilibrium constant, K′, varies linearly with K′ [chloroform]. The slope of the line corresponds to the equilibrium constant for the formation of the hydrogen-bonded complex between CHCl3 and DMA in CCl4. The value, 0.9 1/mole, agrees with that obtained from a proton magnetic resonance method. The agreement is particularly noteworthy when we consider that the concentrations of phenol used in the proton magnetic resonance and ultraviolet spectral methods differ by a factor of 200, which leads definitely to the conclusion that the hydrogen-bonded CHCl3–DMA complex formed is 1:1. In cyclohexane/CHCl3 mixed solvent, similar results are obtained.

Study of a-Si:H / c-Si Heterojunctions for PV Applications

1996 ◽  
Vol 420 ◽  
Author(s):  
F. Zignani ◽  
R. Galloni ◽  
R. Rizzoli ◽  
M. Ruth ◽  
C. Summonte ◽  
...  
Keyword(s):  
Gas Phase ◽  
Open Circuit Voltage ◽  
Accurate Determination ◽  
Electrical Characterization ◽  
Silicon Layer ◽  
Open Circuit ◽  
Hydrogen Dilution ◽  
Intrinsic Efficiency

Abstracta-Si:H / c-Si heterojunction diodes were produced by PECVD with varying amorphous silicon layer thickness and hydrogen dilution of the gas phase. An accurate determination of the growth rate also in the initial stages of the deposition was made possible by an original chemical method based on the dissolution of the films followed by spectroscopical analysis of the obtained solution.The electrical characterization of the diodes confirms the generation - recombination - multitunneling nature of the transport. Although H2 dilution is important, however, beyond a certain level it is detrimental for the junction quality, probably due to the transition to a microcrystalline phase deposition. Solar cells were also produced, the best results being an open circuit voltage of 610 mV and an intrinsic efficiency of 14.2%.

Experimental determination of the equilibrium constant of the reaction CH3 + O2 ? CH3O2 during the gas-phase oxidation of methane

1982 ◽  
Vol 14 (11) ◽  
pp. 1231-1241 ◽  
Author(s):  
L. A. Khachatryan ◽  
O. M. Niazyan ◽  
A. A. Mantashyan ◽  
V. I. Vedeneev ◽  
M. A. Teitel'boim
Keyword(s):  
Experimental Determination ◽  
Equilibrium Constant ◽  
Gas Phase ◽  
Oxidation Of Methane ◽  
Phase Oxidation ◽  
Gas Phase Oxidation
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