Browsing by Author "Theocharis, Charis R."
Now showing items 21-40 of 83
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Article
Crystal structure of 3,3-(p-N, N-dimethylaminophenyl)-6-N, N-dimethylaminophthalide, (crystal-violet lactone)
Theocharis, Charis R.; Jones, W. (1984)The title compound is C26H29N302, Mr,=415.54, monoclinic, P21/n, a=12.228(1), b=17.385(2), c=11.786(1) Å, Vc=2308.7 Å3, Z=4, Dx=1.19 Mg m-3, μ=5.29 cm-1, F(000)=888. Final R=0.046 for 2301 independent reflections. Three ...
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Article
A diffuse reflectance fourier transform infra‐red study of carbon dioxide adsorption on silicalite‐I
Llewellyn, P. L.; Theocharis, Charis R. (1991)The adsorption of carbon dioxide at room temperature on large, well‐defined crystals of Silicalite‐I was studied by diffuse reflectance Fourier transfer infra‐red spectroscopy. The zeolite samples had a mean crystal size ...
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Book Chapter
Dimerization and polymerization of enones in the fluid and solid states
Theocharis, Charis R. (John Wiley and Sons Inc., 2010)
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Article
Effect of fluoro substitution on the packing motifs of benzylidene- and dibenzylidene-cyclopentanones
Hopkin, S. E.; Muir, M.; Theocharis, Charis R. (1991)The structure and solid-state reactivity of one fluorinated benzyl(benzylidene)cyclopentanone and two fluorinated dibenzylidenecyclopentanones are reported and the influence of fluoro substitution upon the packing of ...
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Article
The effect of sorbed toluene on the surface properties of calcium hydroxide
Pashalidis, Ioannis; Theocharis, Charis R. (1998)The surface properties of commercial grade calcium hydroxide were studied by nitrogen adsorption isotherm analysis, FTIR spectroscopy (KBr transmission and reflectance) and TGA analysis before and after toluene adsorption. ...
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Article
Effect of surface and textural characteristics on uranium adsorption by nanoporous titania
Paschalidou, Polyxeni; Liatsou, Ioanna; Pashalidis, Ioannis; Theocharis, Charis R. (2017)TiO2 solids of different grain size have been prepared by micelle-mediated hydrolysis and a solvothermal method, and characterized by SEM microscopy and N2 adsorption. The effect of the BET surface area/pore volume and the ...
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Article
The effect of surface properties on the uranium adsorption by mesoporous ceria
Paschalidou, Polyxeni; Liatsou, Ioanna; Pashalidis, Ioannis; Theocharis, Charis R. (2018)CeO2 solids of different surface areas have been prepared by a sol–gel method using Triton X-100. The samples have then characterized by N2 adsorption, XRD, SEM microscopy and FTIR spectroscopy. Furthermore, the effect of ...
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Conference Object
The effect of surface properties on the uranium adsorption by mesoporous ceria
Paschalidou, Polyxeni; Liatsou, Ioanna; Pashalidis, Ioannis; Theocharis, Charis R. (2018)CeO2 solids of different surface areas have been prepared by a sol–gel method using Triton X-100. The samples have then characterized by N2 adsorption, XRD, SEM microscopy and FTIR spectroscopy. Furthermore, the effect of ...
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Article
The efficient removal of organic templating molecules from aluminophosphate molecular sieves
Gelsthorpe, M. R.; Theocharis, Charis R. (1986)Treatment with methanolic HCl leads to the complete removal of templating molecules from the title solid
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Article
Engineering organic crystals so as to control the photoreactivity of the reactants and the crystallinity of the products
Jones, W.; Nakanishi, H.; Theocharis, Charis R.; Thomas, John M. (1980)A family of organic molecular crystals based on benzylidenecyclopentanone provides a basis for an assessment of topotactic and topochemical photoreactivity.
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Article
Enhancement of Lewis acidity in layer aluminosilicates. Treatment with acetic acid
Theocharis, Charis R.; S'Jacob, K. J.; Gray, A. C. (1988)The effect of exposure of Wyoming bentonite to glacial acetic acid has been studied by F.t.i.r., X.p.s, SEM and acidity measurements, in order to investigate the possibility of using such a non-aqueous technique as an ...
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Article
Evaluation of novel, cationic electrospun microfibrous membranes as adsorbents in bacteria removal
Papaphilippou, Petri Ch; Vyrides, Ioannis; Mpekris, Fotios; Stylianopoulos, Triantafyllos; Papatryfonos, Charalambos A.; Theocharis, Charis R.; Krasia‐Christoforou, Theodora (2015)Electrospun microfibrous membranes comprised of poly(methyl methacrylate)-poly((2-diethylamino)ethyl methacrylate) random copolymers (PMMA-co-PDEAEMA) of various chemical compositions blended together with a commercially ...
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Article
Fluoro substitution effects in the crystal packing of fluorobenzenes
Theocharis, Charis R. (1992)In this paper the effect of fluoro substitution on the packing of the 2-benzyl-5-benzylidene- and 2,5-dibenzylidenecyclopentanone frameworks will be discussed. We chose the fluoro substituent because it has a much smaller ...
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Article
Incorporation of zinc in an aluminophosphate microporous phase
Bond, G. C.; Gelsthorpe, M. R.; Sing, K. S. W.; Theocharis, Charis R. (1985)A new molecular sieve with formula Zn0.06Al 0.96PO4 has been prepared, which has a structure similar to that of the aluminophosphate ALPO-5
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Article
Induction of mesoporosity in ALPO-5. Treatment with silicon tetrachloride
Theocharis, Charis R.; Gelsthorpe, M. R.; Yeates, D. (1989)Reaction of microporous AlPO4 (ALPO-5) with SiCl4 vapour in a nitrogen atmosphere at 870 K results in the partial isomorphous substitution of P predominantly by Si. The product has fewer but stronger acid sites than the ...
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Article
Infrared spectra of some thin amorphous films of MoO3-In2O3 deposited by vacuum evaporation
Anwar, M.; Khan, G. A.; Hogarth, C. A.; Theocharis, Charis R. (1989)The infrared absorption spectra of vacuum-evaporated MoO3-In2O3 thin films are reported for a series of films of varying compositions within the spectral range 4000 to 400 cm-1 and interpreted in relation to the spectrum ...
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Article
Infrared spectroscopic study of vacuum evaporated amorphous thin films of MoO3-SiO
Anwar, M.; Hogarth, C. A.; Theocharis, Charis R. (1990)A series of amorphous MoO3-SiO thin films of varying compositions were investigated by infrared spectroscopy. In some cases, a shift in band frequency was observed. Some new peaks appeared when SiO was mixed in MoO3. These ...
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Article
Infrared-Spectroscopy and Electrical Characterization of Phosphorus Implanted and Annealed Silicon Layers
Seas, Antonios; Eleftheriou, Maria-Elena; Christofides, Constantinos; Theocharis, Charis R. (1995)Fourier transform infrared spectroscopy has been carried out in the spectral range of 2.5 to 25 mu m, both in transmission and reflection mode on phosphorus-implanted, non-annealed and annealed silicon layers. Complementary ...
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Article
Investigation of infrared absorption spectra of copper phosphate glasses containing some rare earth oxides
Ananthamohan, C.; Hogarth, C. A.; Theocharis, Charis R.; Yeates, D. (1990)The spectra of copper-lutetium-phosphate and copper-erbium-phosphate glasses have been studied within the spectral range 4000 to 400 cm- by Fourier transform infrared spectroscopy. Incorporation of a small amount of lutetium ...
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Article
Investigation of the synthesis and properties of ternary V-Cu-Ce Oxides of Composition VxCuxCe1-2xO2
Attipa, Christothea; Theocharis, Charis R. (2009)Aco-precipitation method has been used to prepare ternary mixed oxides based on ceria with the general formula VxCuxCe 1-2xO2, where x was varied between 0.05 and 0.45. The structural and surface properties as well as the ...