Room temperature interaction of co with alkali-metal cations in M-ZSM-5 zeolites as studied by joint FT-IR spectroscopy and microcalorimetry

2004 ◽  
pp. 1686-1692 ◽  
Author(s):  
Bonelli B. ◽  
Fubini B. ◽  
Onida B. ◽  
Turnes Palomino G. ◽  
Rodríguez Delgado M. ◽  
...  
Keyword(s):  
Ir Spectroscopy ◽  
Alkali Metal ◽  
Room Temperature ◽  
Metal Cations ◽  
Alkali Metal Cations ◽  
Ft Ir ◽  
Temperature Interaction ◽  
Ft Ir Spectroscopy

scholarly journals MODIFIED TEA LEAVES RESIDUAL FOR NICOTINE ADSORPTION

2021 ◽  
Vol 40 (3) ◽  
pp. 28-42
Author(s):  
Y. Walid AlBizreh ◽  
rasha Almostafa ◽  
Malak ALJoubbeh
Keyword(s):  
Experimental Data ◽  
Spectral Analysis ◽  
Ir Spectroscopy ◽  
Room Temperature ◽  
Tea Leaves ◽  
Adsorption Models ◽  
Initial Concentration ◽  
Adsorbed Amount ◽  
Ft Ir ◽  
Ft Ir Spectroscopy

The boiled tea leaves residual was modified with oleum of weight 1:1 to prepare an adsorbent that is capable to adsorb nicotine on its surface. The surface properties of the sample were studied by using the FT-IR spectroscopy after each treatment resulting obvious peaks that indicate the modification of the sample with oleum and the adsorption of nicotine on its surface. The concentration of nicotine in the prepared solutions was measured by the use of spectral analysis. The change of nicotine΄s adsorption was studied with the change of time. An increase in the adsorbed amount was noticed until the equilibrium was reached after 24hours. In addition, an increase of the adsorbed amount of nicotine with the increase of its initial concentration was observed at the room temperature. The experimental data corresponded with adsorption models of Langmuir, Freundlish and Temkin, besides, a mechanism of the adsorption of nicotine was suggested to occur with the participation of the two nitrogen atoms.

scholarly journals Electrospun Nickel Manganite (NiMn2O4) Nanocrystalline Fibers for Humidity and Temperature Sensing

Sensors ◽  
2021 ◽  
Vol 21 (13) ◽  
pp. 4357
Author(s):  
Milena P. Dojcinovic ◽  
Zorka Z. Vasiljevic ◽  
Jugoslav B. Krstic ◽  
Jelena D. Vujancevic ◽  
Smilja Markovic ◽  
...  
Keyword(s):  
Relative Humidity ◽  
Ir Spectroscopy ◽  
Room Temperature ◽  
Material Constant ◽  
Temperature Sensing ◽  
X Ray Diffraction ◽  
Spectroscopy Analysis ◽  
Bet Specific Surface Area ◽  
Ft Ir ◽  
Ft Ir Spectroscopy

Nickel manganite nanocrystalline fibers were obtained by electrospinning and subsequent calcination at 400 °C. As-spun fibers were characterized by TG/DTA, Scanning Electron Microscopy and FT-IR spectroscopy analysis. X-ray diffraction and FT-IR spectroscopy analysis confirmed the formation of nickel manganite with a cubic spinel structure, while N2 physisorption at 77 K enabled determination of the BET specific surface area as 25.3 m2/g and (BJH) mesopore volume as 21.5 m2/g. The material constant (B) of the nanocrystalline nickel manganite fibers applied by drop-casting on test interdigitated electrodes on alumina substrate, dried at room temperature, was determined as 4379 K in the 20–50 °C temperature range and a temperature sensitivity of −4.95%/K at room temperature (25 °C). The change of impedance with relative humidity was monitored at 25 and 50 °C for a relative humidity (RH) change of 40 to 90% in the 42 Hzπ1 MHz frequency range. At 100 Hz and 25 °C, the sensitivity of 327.36 ± 80.12 kΩ/%RH was determined, showing that nickel manganite obtained by electrospinning has potential as a multifunctional material for combined humidity and temperature sensing.

X-ray, FT-IR, ESI MS and PM5 studies of Schiff base of gossypol with allylamine and its complexes with alkali metal cations and perchlorate anion

2008 ◽  
Vol 19 (6) ◽  
pp. 983-995 ◽  
Author(s):  
Piotr Przybylski ◽  
Krystian Pyta ◽  
Małgorzata Ratajczak-Sitarz ◽  
Andrzej Katrusiak ◽  
Bogumił Brzezinski
Keyword(s):  
Schiff Base ◽  
Alkali Metal ◽  
Metal Cations ◽  
Alkali Metal Cations ◽  
X Ray ◽  
Esi Ms ◽  
Ft Ir

scholarly journals Synthesis of a Cinnamic Acid Derivative and Bioactivity as an Anticancer Based on Result Quantitative Structure Activity Relationship (QSAR) Analysis

2020 ◽  
Vol 13 (1) ◽  
pp. 23
Author(s):  
Abdul Fattah
Keyword(s):  
Melting Point ◽  
Ir Spectroscopy ◽  
Room Temperature ◽  
Quantitative Structure Activity Relationship ◽  
Quantitative Structure ◽  
Cinnamic Acid Derivative ◽  
Qsar Analysis ◽  
Structure Activity ◽  
Ft Ir ◽  
Ft Ir Spectroscopy

Synthesis of compound (E)-4-(3-oxo-3-(phenethylamino)prop-1-en-1-il)-1,2-phenylene diacetate (3) analogue (E)-3-(3,4-dihydroxyphenyl)-N-phenethylacrylamide as a recommendation from the QSAR analysis was carried out. The synthesis of these compounds uses the starting material of caffeic acid through the stages of the reaction of acetylation, chlorination, and amidation. Acetylation was carried out using acetic anhydride in pyridine at room temperature for 4 hours. Chlorination was carried out using thionyl chloride reagent in dimethylphromamide solvent under reflux conditions at 80ºC for 4 hours, followed by amidation using phenethylamine in dichloromethane solvent at room temperature for 1 hour. The structure of each phase of the reaction product is identified using FT-IR spectroscopy. Acetylation produces white crystalline solids with melting point 182-184oC, and amidation produces compound 3 in the form of white crystals with melting point 170-173oC. The results of activity tests on murine leukaemia P-388  cells showed that the activity of compound 3 was classified as very strong (IC50 = 0,5 µg /mL) so that it was potentially used as an anticancer drug.

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