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Effects of Polarization of Radiofrequency Radiation in Polycrystalline ESR
V. E. Fainzilberg
Department of Chemistry, Long Island University, USA
Redispersable Nanopowders for Wet Chemical Coatings Processes: Application to Transparent Conducting Coatings
N. Al-Dahoudi, M.A. Aegerter
Institut fuer Neue Materialien gem. GmbH - INM
Department of Coating Technology, Saarbruecken, Germany
Luminescent Materials, Recognition Phases of The Chemical Sensors and Heterogeneous Catalysts Prepared By Sol-Gel Method
Andrzej M. Kłonkowski
Faculty of Chemistry, University of Gdańsk, Poland
Abstract
The sol-gel process enables one to prepare oxide xerogels at room temperature. By using this method, it is possible to encapsulate a wide variety of organic, complex (organometallic) molecules and metallic nanoparticles stabilized by organic ligands in the inorganic or inorganic/organic hybrid matrix. Studies of this new type of inorganic/organic composite have evolved towards the deliberate doping of the supramolecular species. This review gives three examples of how doped xerogel materials prepared by the sol-gel method are emerging as an important means of producing new materials. The first part of this review is devoted to luminescent materials which are based on the antenna effect and are composed of Eu(III) complex (luminescence centre) entrapped in xerogel matrix. In this case results of the experiments concerning the coordination sphere composition show that a cryptand ligand with aromatic groups and an aromatic co-ligand, settle efficient action the antenna effect and isolate the central ion from each efficient quenchers, as e.g. water molecules. Secondly, silica xerogel samples with entrapped series of three fluorescent chemosensors of the Ant-R-Ant type, where Ant is an anthryl group and R is a receptor (spacer) with donor atoms, were prepared as chemical recognition phases. The recognition phase with fluorosensor of the type Ant-N-O-O-N-Ant, where N and O are donor atoms, can be regenerated many times and seems to be most promising system for the fluorescent chemical sensor. In the third part of this paper, ligand protected metal nanoclusters as immobilized catalysts are the point of interest. This type of heterogeneous catalysts are much less investigated than the bare metal particles on supports. The main interest is focused on the function of the ligands.
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Download article (PDF)Spectroscopic Studies on the Inclusion Complexes of Tetrakis(2-hidroxy-5-nitrophenyl)porphyrin with α-Cyclodextrin in Solution and in Sol-Gel Matrix
A. O. Ribeiro, C. R. Neri, Y. Iamamoto and O. A. Serra
Rare Earth/Bioinorganic Laboratory - Chemistry Department - FFCLRP
University of São Paulo, Brasil
Comparison of Sol-Gel and Solid State Prepared Eu2+ Doped Calcium Aluminates
Tuomas Aitasalo1,2, Jorma Hölsä1,3, Högne Jungner 4, Mika Lastusaari1,2, Janne Niittykoski1,2
1University of Turku, Department of Chemistry, Finland
2Graduate School of Materials Research, Turku, Finland
3ENSCP, CNRS, Laboratoire de Chimie Appliquée de l'Etat Solide, Paris, France
4University of Helsinki, Dating Laboratory, Finland
Highly Porous Aerogels with Very Low Permability
J. Phalippou, T. Woignier, R. Sempéré, Ph. Dieudonné
Laboratoire des Verres - UMR CNRS 5587, Université de Montpellier, France
The Study of Thermal Disordering of The KSc(WO4)2 Crystal Structure by Raman Spectroscopy
M. M±czka, J. Hanuza, N. Sidorov and S. Kojima
Institute of Low Temperature and Structure Research, Polish Academy of Sciences, Wrocław, Poland
The Electrochemical Redox Reactions in Solvated Silica Sol-Gel Glass
Marcin Opallo
Institute of Physical Chemistry, Polish Academy of Sciences, Warszawa, Poland
Structure, Spectroscopy and Dielectric Properties of BaTiO3:Eu3+ Nanocrystallites Prepared by The Sol-Gel Method
D. Hreniaka, E. Łukowiaka, K. Maruszewskia,b, R. P±zikc, and W. Stręka
aInstitute for Low Temperature and Structure Research, Polish Academy of Sciences, Wrocław, Poland
bMechanical Faculty, Institute of Materials Science and Applied Mechanics,Wrocław University of Technology, Poland
cChemistry Department, Opole University, Poland
Optical Behavior of Sol-Gel Derived Photonic Structures Formed by Submicron Silica Spheres
M. Jasiorski1, K. Maruszewski1,2 and W. Stręk1
1Institute for Low Temperature and Structure Research, Polish Academy of Sciences, Wrocław, Poland
2Mechanical Faculty, Institute of Materials Science and Applied Mechanics,Wrocław University of Technology, Poland
Lu2O3:Eu, a New X-ray Phosphor
E. Zych*, D. Hreniak and W. Strek
*Faculty of Chemistry, University of Wrocław, Poland
Institute for Low Temperature and Structure Research Polish Academy of Sciences, Wrocław, Poland
Review of Luminescence and Magnetic Properties of Antiferromagnetic KMnCl3, RbMnCl3, TlMnCl3 and (CnH2n+1NH3)2MnCl4 (n = 1, 2)
Małgorzata Pawłowska, Walter Wojciechowski
Institute of Inorganic Chemistry and Metallurgy of Rare Elements,
Wrocław University of Technology, Wrocław, Poland
Photochromic Hybrid Sol-Gel Coatings: Preparation, Properties, and Applications
A. Klukowska1, U. Posset1, G. Schottner1, M. L. Wis2,
C. Salemi-Delvaux 2, V. Malatesta2
1 Fraunhofer-Institut Silicatforschung (ISC), Würzburg, Germany
2 Great Lakes Chemical Corporation, San Donato Milanese, Italy
Opportunities for Sol-Gel Materials in Fuel Cells
Lisa C. Klein
Rutgers-the State University of New Jersey, Ceramic & Materials Engineering, NJ, USA
