Preparation and Research of Polymolybdate/Polymer Composite Membrane by Electrospinning and its Photo-Catalytic Property

2013 ◽  
Vol 395-396 ◽  
pp. 415-418
Author(s):  
Zhi Ming Zhang ◽  
Ting Ting Li ◽  
Ce Liu
Keyword(s):  
Hydrogen Bond ◽  
Ir Spectra ◽  
Composite Membrane ◽  
Phosphomolybdic Acid ◽  
Uv Spectra ◽  
Polarizing Microscopy ◽  
Optimum Parameters ◽  
Anhydrous Alcohol ◽  
Cellulosic Membrane ◽  
Strong Absorption Peak

Composite cellulosic membrane of PMMA and phosphomolybdic acid was prepared by electrospinning. During the progress, the factor of electrospinning and the optimum parameters was found out within the orthogonal combination experiment program. Then the morphology of the composite cellulosic membrane was observed by polarizing microscopy. To resolve PMMA, DMF and anhydrous alcohol were used. When their ratios were 1:1, the diameter of the fibre was the most homogeneous. During the electrospinning, the concentration of PMMA was the most important factor. When the concentrations were less then 10%, there were hardly fibres on the foil. The diameter of the fibre ranged from 0.5 to 1.2 μm along with the increment of the concentration of PMMA. The addition of phosphomolybdic acid made the diameter of the fibre decrease. IR-spectra showed that phosphomolybdic acid kept its Keggin structure, and it interacted with PMMA through hydrogen bond. The composite cellulosic membrane changed its color when imposed in bright space. UV spectra represented that the composite cellulosic membrane had a strong absorption peak at 700nm.

An infrared study of the interaction between ethyl N-(diphenylmethylene)glycinate with proton donors: comparison with N-benzylidenemethylamine

1986 ◽  
Vol 64 (12) ◽  
pp. 2305-2309 ◽  
Author(s):  
Marleen Ruysen ◽  
Thérèse Zeegers-Huyskens
Keyword(s):  
Hydrogen Bond ◽  
Ir Spectra ◽  
Equilibrium Constants ◽  
Lone Pair ◽  
Imino Group ◽  
Infrared Study ◽  
Hydrogen Bond Formation ◽  
Hydroxy Proton ◽  
Proton Donors ◽  
Intramolecular Hydrogen

The interaction between ethyl N-(diphenylmethylene)glycinate (DPG) and hydroxy proton donors or pyrrole has been investigated by ir spectrometry. The equilibrium constants, enthalpies, and entropies of complex formation have been determined in carbon tetrachloride solution and compared with the data obtained for the complexes involving N-benzylidene-methylamine and the same proton donors. The ir spectra studied mainly in the νOH, νC=N, νC=O, and νC—O regions suggest that hydrogen bond formation occurs at the N atom of the imino group and at the O atom of the carbonyl group. The results are discussed in terms of the basicity at the two acceptor sites and of the accessibility of the lone pair of electrons. The ir spectra of the solid adduct of DPG with HCl show that protonation takes place on the N atom. The protonated structure is possibly stabilized by an intramolecular hydrogen bond.

Spectral Investigations of the Effects of 60Co-Gamma Irradiation on Iodothyronine and Iodotyrosines

1987 ◽  
Vol 41 (1) ◽  
pp. 74-79
Author(s):  
A. Obaid ◽  
S. Basahl ◽  
A. Diefallah ◽  
R. Abu-Eittah
Keyword(s):  
Ir Spectra ◽  
Gamma Irradiation ◽  
Uv Spectra ◽  
Uv And Ir Spectra ◽  
60Co Gamma ◽  
Carbonyl Absorption

Solids of 3-iodo-, 3–5–di-iodotyrosine and 3,5-di-iodothyronine were irradiated by 60Co-gamma irradiation for a period of about twenty hours. The effects of irradiation were investigated through a study of the UV and IR spectra of irradiated samples. UV spectra showed the presence of a new band at 360 nm which was assigned to the formation of IO−. IR spectra showed a strong carbonyl absorption and the removal of the carboxylate band in the case of thyronine only. For comparison, the spectra of the studied compounds were investigated before irradiation.

Rotational Isomers, Intramolecular Hydrogen Bond, and IR Spectra of o-Vinylphenol

2014 ◽  
Vol 81 (1) ◽  
pp. 15-22 ◽  
Author(s):  
V. P. Glazunov ◽  
D. V. Berdyshev ◽  
N. N. Balaneva ◽  
O. S. Radchenko ◽  
V. L. Novikov
Keyword(s):  
Hydrogen Bond ◽  
Ir Spectra ◽  
Intramolecular Hydrogen Bond ◽  
Rotational Isomers ◽  
Intramolecular Hydrogen

scholarly journals Temperature and H/D Isotopic Effects in the IR Spectra of the Hydrogen Bond in Solid-State 2-Furanacetic Acid and 2-Furanacrylic Acid

2012 ◽  
Vol 2012 ◽  
pp. 1-17 ◽  
Author(s):  
Henryk T. Flakus ◽  
Anna Jarczyk-Jędryka
Keyword(s):  
Hydrogen Bond ◽  
Electronic Structure ◽  
Ir Spectra ◽  
Close Relation ◽  
Coupling Mechanism ◽  
Band Frequency ◽  
Molecular Systems ◽  
Exciton Coupling ◽  
Relative Contribution ◽  
Type Coupling

Polarized IR spectra of 2-furanacetic acid and of 2-furanacrylic acid crystals were measured at 293 K and 77 K in the vO−H and vO−H band frequency ranges. The corresponding spectra of the two individual systems strongly differ, one from the other, by the corresponding band shapes as well as by the temperature effect characterizing the bands. The crystal spectral properties remain in a close relation with the electronic structure of the two different molecular systems. We show that a vibronic coupling mechanism involving the hydrogen bond protons and the electrons on the π-electronic systems in the molecules determines the way in which the vibrational exciton coupling between the hydrogen bonds in the carboxylic acid dimers occurs. A strong coupling in 2-furanacrylic acid dimers prefers a “tail-to-head-” type Davydov coupling widespread by the π-electrons. A weak through-space coupling in 2-furanacetic acid dimers is responsible for a “side-to-side-” type coupling. The relative contribution of each exciton coupling mechanism in the dimer spectra generation is temperature and the molecular electronic structure dependent. This explains the observed difference in the temperature-induced evolution of the compared spectra.

scholarly journals A Quaternized Polysulfone Membrane for Zinc-Bromine Redox Flow Battery

2014 ◽  
Vol 2014 ◽  
pp. 1-5 ◽  
Author(s):  
Mingqiang Li ◽  
Hang Su ◽  
Qinggang Qiu ◽  
Guang Zhao ◽  
Yu Sun ◽  
...  
Keyword(s):  
Ir Spectra ◽  
Composite Membrane ◽  
Discharge Voltage ◽  
The Novel ◽  
Redox Flow Battery ◽  
Flow Battery ◽  
Polysulfone Membrane ◽  
Ft Ir ◽  
Electrochemical Analyzer ◽  
A Current

A quaternized polysulfone (QNPSU) composite membrane is fabricated for zinc-bromine redox flow battery. The structure of the membrane is examined by FT-IR spectra and SEM. The conductivity of the membrane is tested by electrochemical analyzer. After a zinc-bromine battery with this composite membrane is operated at different voltage while charging and at different current while discharging to examine the performance of the membrane, it is found that the discharge voltage was 0.9672 V and the power density was 6 mW/cm2at a current of 0.1 A, which indicated that the novel composite membrane is a promising material for the flow battery.

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