Library

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
  • 1975-1979  (14)
Source
Material
Years
Year
  • 1
    Electronic Resource
    Electronic Resource
    Flowing cell-reactor for recording infrared spectra of adsorbed molecules during catalysis (1976)
    Springer
    Journal of applied spectroscopy 24 (1976), S. 127-128 
    Details
    ISSN: 1573-8647
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01100743
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Thermodesorption studies on the interaction of propylene with solid CoO−MgO solutions (1975)
    Springer
    Reaction kinetics and catalysis letters 2 (1975), S. 211-215 
    Details
    ISSN: 1588-2837
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Abstract Проведены термодесорбционные исследования взаимодействия пропилена и кислорода на твердых растворах CoO−MgO. Получены значения энергии активации десорбции, Ed, для 12% CoO−MgO 1,5% CoO−MgO и MgO рав ные 10,5, 6,5 и 8,8 ккал/моль, соответственно. Показано, что предварительнчя адсорбция кислоропа или совместная алсорбция кислорода на исследованных твердых растворах приводит к необратимой адсорбции пропилена.
    Notes: Abstract Thermodesorption studies on the interaction of propylene and oxygen over solid CoO−MgO solutions have been carried out. The activation energy of desorption, Ed, for 12% CoO−MgO, 1, 5% CoO−MgO and MgO samples was found to be 10.5, 6.5 and 8.8 kcal/mol, respectively. Pre-adsorption of oxygen or simultaneous adsorption of propylene and oxygen were shown to lead to irreversible adsorption of propylene on the solid solutions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02068193
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    IR Spectroscopy study of the interaction of methylpyrazine and 4-methylpyrimidine with vanadium and molybdenum oxides supported on magnesium oxide (1977)
    Springer
    Russian chemical bulletin 26 (1977), S. 2287-2292 
    Details
    ISSN: 1573-9171
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Conclusions 1. The introduction of vanadium and molybdenum oxides into MgO gives rise to the formation of acid centers which bond with adsorbed methylpyrazine and 4-methylpyrimidine through the ring nitrogen atom. 2. Increasing the temperature changes the state of these active centers and thereby increases the strength of coordinational bonding of the methylpyrazine and 4-methylpyrimidine with the surface of the vanadium and molybdenum oxides on MgO. Similar effects are not observed in the interaction of these diazines with the γ-Al2O3 surface. 3. The interaction of oxygen with methylpyrazine and 4-methylpyrimidine adsorbed on vanadium and molybdenum oxides supported by MgO gives rise to the formation of surface heterocyclic carbonyl compounds.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00958712
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Magnetic and chemisorptional properties of dilute, highly dispersed CoO-MgO solid solutions (1977)
    Springer
    Russian chemical bulletin 26 (1977), S. 2474-2478 
    Details
    ISSN: 1573-9171
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Conclusions 1. The CO adsorbed on CoO-MgO solid solutions with high specific surface areas is bound to three different types of surface centers. The first type is a pair of Co2+ ions, one in octahedral coordination and one in square pyramidal coordination, each weakly interacting with neighboring ions. The second type of center is an individual Co2+ ion in square pyramidal coordination and strongly interacting with neighboring Co2+ ions in the same coordination. The third type of center is a variant of the second, one ion Co2+ ion in square pyramidal coordination interacting with neighboring Co2+ ions in octahedral coordination. 2. The CO molecule bonds more firmly to centers of the first type than to centers of either of the other types.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00924547
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    IR-spectroscopic study of compounds formed by unsaturated aldehydes and acids on the cobalt molybdate surface (1978)
    Springer
    Russian chemical bulletin 27 (1978), S. 466-472 
    Details
    ISSN: 1573-9171
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Conclusions 1. Acrolein and methacrolein coordinately bond through the aldehyde group oxygen during adsorption on the surface of cobalt molybdate catalysts modified by Co, V, and Mo ions. 2. The C=C bond of the aldehyde does not participate in the formation of surface compounds with cobalt molybdate. 3. Acrylates and methacrylates are formed in the interaction of acrylic and methacrylic acids with the catalyst surface. 4. Modification of cobalt molybdate with Co, V, and Mo ions changes the strength of surface bonding and affects the catalytic reaction involved in the formation of CO and CO2.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00923917
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    Investigation of the peculiarities of the oxidation of cyclohexane on NaY and NaCuY zeolites by the method of IR spectroscopy (1975)
    Springer
    Russian chemical bulletin 24 (1975), S. 688-691 
    Details
    ISSN: 1573-9171
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Conclusions 1. Spectral investigations using a closed method showed the existence of a strong adsorption of cyclohexane (CH) on NaY zeolite in the precatalytic temperature region. 2. In the case of passage of a mixture of C6H12+O2, NaY zeolite is characterized by the appearance of the absorption bands 1720, 1780, and 1820 cm−1, corresponding to carbonyl-containing and peroxide compounds, at 60–80°. In the case of partial replacement of the Na+ ion by Cu2+, the formation of these compounds is not recorded up to 180°. 3. The process of oxidation of CH on zeolites is of a heterogeneous — homogeneous character. The transition of the reaction into the volume occurs in the case of sodium zeolite at∼120°, and in the case of copper — sodium zeolite at 220°. 4. A fluctuating system of the reaction of oxidation of CH on NaY zeolite is of an autocatalytic character and is associated with the periodic accumulation of peroxide-type compounds on the surface of the zeolites.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00920674
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    Reaction of oxygen with surface propylene complexes on CoO-MgO solid solutions (1975)
    Springer
    Russian chemical bulletin 24 (1975), S. 1542-1544 
    Details
    ISSN: 1573-9171
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Conclusions 1. The reaction of oxygen with surface-propylene complexes at room temperature on a 0.1% CoO-MgO sample leads to the formation of mild oxidation products with their escape into space. 2. The effect of a discrete, “jumplike” liberation of the reaction product was detected in the case of the 0.1% CoO-MgO sample, with a simultaneous sharp increase in the oxygen absorption. This effect is practically absent for the 12% CoO-MgO. 3. A possible mechanism was proposed for the reaction of oxygen with surface-propylene complexes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00946440
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    Investigation of the interaction of isobutylene with an antimony-tin catalyst (1976)
    Springer
    Russian chemical bulletin 25 (1976), S. 722-725 
    Details
    ISSN: 1573-9171
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Conclusions 1. The surface of a SnO2-Sb2O4 catalyst is uniformly homogeneous with respect to the heats of adsorption of isobutylene. The heats vary from 50 to 20 kcal/mole as the degree of coverage is increased to 18% of a monolayer. 2. Isobutylene is adsorbed on SnO2-Sb2O4 in two forms: reversible (desorbed in the range 79–100° with Edes=21 kcal/mole) and irreversible. 3. Irreversibly chemisorbed isobutylene exists on the surface primarily in the form of theπ-methallyl complex.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00922367
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 9
    Electronic Resource
    Electronic Resource
    ESR study of the interaction of oxygen and propene with solid CoO−MgO solutions under pulse conditions (1976)
    Springer
    Reaction kinetics and catalysis letters 4 (1976), S. 275-279 
    Details
    ISSN: 1588-2837
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Abstract Методом ЭПР показано, что на поверхности 1% CoO−MgO после подачи на образец импульсов кислорода при комнатной температуре образуются ион-радикалы O 2 − с gI=2.0085 и gII=2.087. Нагревание образца в резонаторе спектрометра до 150 °C приводит к полному исчезновению в ЭПР-спектрах сигнала O 2 − . Получена зависимость изменения интенсивности сигнала O 2 − во времени как результат взаимодействия адсовбированных пропилена и кислорода на поверхности образца.
    Notes: Abstract An ESR study has shown that under the action of oxygen pulses, radical ions O 2 − with gI=2.0085 and gII=2.087 are generated at room temperature on the surface of 1% CoO−MgO. Heating of the sample to 150 °C in the spectrometer results in complete disappearance of the O 2 − signal from the ESR spectra. The variation of the O 2 − signal intensity with time due to the interaction between propene and oxygen adsorbed on the sample surface, has been measured.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02062009
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 10
    Electronic Resource
    Electronic Resource
    Quantum-chemical investigation of the interaction of propene and oxygen with solid CoO−MgO surfaces (1976)
    Springer
    Reaction kinetics and catalysis letters 4 (1976), S. 269-274 
    Details
    ISSN: 1588-2837
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Abstract С помощью квантово-химического метода изучались взаимодействие пропилена и кислорсда с ионами Co2+, Co3+ и Mg2+ на поверхности решетки MgO, а также адсорбция заряженной формы O 2 − и п-аллиьного радикала. Показано, что адсорбция пропилена должна происходить более прочно на ионах Co3+, чем на ионах Co2+ и Mg2+. В противо-положность пропилену кислород адсорбируется более прогно на ионах Co2+ с последующим электронным переносом на молекулу кислорода. Полученные результаты сопоставлены с экспериментальными данными.
    Notes: Abstract The interaction of propene and oxygen with Co2+, Co3+ and Mg2+ ions on the MgO lattice surface, as well as the adsorption of charged forms of O 2 − and π-allyl radical have been studied by a quantum-chemical method. Propene adsorption has been found to be stronger on Co3+ than on Co2+ and Mg2+ ions. Unlike propene, oxygen is adsorbed more strongly on Co2+ ions with subsequent electron transfer to an oxygen molecule. The data obtained are compared with experimental results.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02062008
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...