Andrzej M Kłonkowski | University of Gdansk (original) (raw)

Papers by Andrzej M Kłonkowski

Research paper thumbnail of Luminescence recognition material as an INHIBIT logic gate in presence of Pb2+ and Cu2+ ions in aqueous solutions

A recognition material consisting of silica xerogel with amino-modified surface selectively recog... more A recognition material consisting of silica xerogel with amino-modified surface selectively recognizes
Pb2+ and Cu2+ (but only in presence of Pb2+ ions) in aqueous solutions of other metal ions. The analytical
action of the material is based on a significant change in luminescence emission spectra of the material
after chemisorption of Pb2+ ions. In the presence of Pb2+ in octahedral coordination environment, a new
broad and strong emission band appears which is peaking at 443 nm (exc = 236 nm) ascribed to electronic
transition in Pb2+ complex. On the other hand, the presence of Cu2+ cations causes significant depression
of the Pb2+ luminescence. The material plays a role of INHIBIT logic gate for both the mentioned cations.
Pb2+ can be analyzed quantitatively but Cu2+ only qualitatively in presence of Pb2+. The material can
be regenerated after chemisorption and is photochemically stable during UV illumination. Besides the
surface of the modified silica support is analyzed by SEM and XPS techniques and coordination sphere of
the chemisorbed Cu2+ ions is determined by electron paramagnetic resonance (EPR).

Research paper thumbnail of ChemInform Abstract: Copper(II) in Organically Modified Silicate Gels Prepared by the Sol- Gel Method

ChemInform, 1993

ABSTRACT ChemInform is a weekly Abstracting Service, delivering concise information at a glance t... more ABSTRACT ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.

Research paper thumbnail of Copper(II) in organically modified silicate gels prepared by the sol?gel method. Bulk complexed gels

Journal of Materials Chemistry, 1993

Two series (A and B) of organically modified silicate gels complexed with Cu II have been synthes... more Two series (A and B) of organically modified silicate gels complexed with Cu II have been synthesized by a twostep reaction procedure:(1) coordination,(2) sol–gel process. Series A consists of unidentate ligands [L]= H 2 N (CH 2) 3 SiO 3/2 and series B of bidentate ...

Research paper thumbnail of Energy transfer and surface plasmon resonance in luminescent materials based on Tb(III) and Ag or Au nanoparticles in silica xerogel

Journal of Non Crystalline Solids, Oct 1, 2008

ABSTRACT Two-component material consisting of terbium(III) ions doping silica xerogel prepared by... more ABSTRACT Two-component material consisting of terbium(III) ions doping silica xerogel prepared by sol–gel procedure shows enhanced Tb(III) photoluminescence. We postulate that in this material the enhancement is owing to energy transfer from one of the defect states in silica to emitting states 3D3 and 5D4 of Tb(III).Surface plasmon resonance effect causes two contrary phenomena. Thus, if in the vicinity of the Tb(III) emission centers are present nanoparticles of Ag, observed is additional improvement of the Tb(III) emission. While, presence of Au nanostructures in the silica doped with Tb(III) causes quenching of the luminescence. In general, both the three-component materials exhibit enhancement of the component silica emission band in the resultant 380 nm band and relatively high thermal stability, especially above 600 °C.

Research paper thumbnail of The local environment of Cu2+ ions incorporated into oxide glasses by ion exchange

Journal of Non Crystalline Solids, 1988

Research paper thumbnail of P029 Wpływ preparatyki katalizatorów palladowych otrzymanych metodą zol-żel na ich właściwości powierzchniowe

Research paper thumbnail of P011 Catalyst precursors consisting of Pd nanoparticles embedded on mesoporous carriers

Research paper thumbnail of Functions of Eu 3+ ions in materials with CdS nanoparticles and oxide matrices

Research paper thumbnail of Quantum size effect and energy transfer in the system: CdS nanoparticles and Tb(III) ions in oxide xerogels

Physics and Chemistry of Glasses

... NaY nano-SiO2 silica MCM-48 CH3-SiO2 Emission in ten sity I / arb. units ... Lett., 1995, 66,... more ... NaY nano-SiO2 silica MCM-48 CH3-SiO2 Emission in ten sity I / arb. units ... Lett., 1995, 66, 1316. 7. Brus, LE J. Chem. Phys., 1983, 79, 5566. 8. Baral, S., Fojtik, A., Weller, H. & Henglein, A. J. Am. Chem. Soc., 1986, 108, 375. 9. Koch, U., Fojtik, A., Weller, H. & Henglein, A. Chem. ...

Research paper thumbnail of Luminescence of Doped Nanoparticles of Wide Band Gap II-VI Compounds

Solid State Phenomena, 2007

... T. Strachowski 4,d and W. Łojkowski 4,e 1 Institute of Physics, Polish Acad. of Sciences, Al.... more ... T. Strachowski 4,d and W. Łojkowski 4,e 1 Institute of Physics, Polish Acad. of Sciences, Al. Lotników 32/46, 02-668 Warsaw, Poland 2 Department of Mathematics & Natural Science College of Science, Cardinal Stefan Wyszyński University, ul. ...

Research paper thumbnail of <title>Chemical recognition phase of the fluorescence chemical sensor for copper (II) ions in aqueous solution</title>

Optoelectronic and Electronic Sensors IV, 2001

ABSTRACT

Research paper thumbnail of <title>Chemical recognition phase and its action in an optical chemical sensor</title>

Optoelectronic and Electronic Sensors III, 1999

ABSTRACT

Research paper thumbnail of A New Fluorescent Chemosensor for Cu 2+ Based on a Dianthracene-Derivative

Supramolecular Chemistry, 2000

Besides being of interest in photochemistry, photoinduced electron transfer (PET) is a process la... more Besides being of interest in photochemistry, photoinduced electron transfer (PET) is a process largely used in the design of fluorescent ion sensing molecules. One of the simplest systems is based on fluorescent aromatic groups linked to amino groups and proposed as possible fluorescent transition metal ion chemosensor [1]. In this case, the fluorescence of the fluorophore “ligths on” when the

Research paper thumbnail of Antenna effect in an oxide xerogel

Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 1998

ABSTRACT

Research paper thumbnail of Electron paramagnetic resonance spectra of Cu(II) at cross-linking points in organically modified silicate gels

Journal of Non-Crystalline Solids, 1992

ABSTRACT

Research paper thumbnail of The nature of the chemical bond in oxide glasses

Journal of Non-Crystalline Solids, 1987

ABSTRACT

Research paper thumbnail of Non-monotonic variations of some parameters in vitreous R2OSiO2 and R2OAl2O3SiO2 systems

Journal of Non-Crystalline Solids, 1985

ABSTRACT

Research paper thumbnail of Energy transfer and surface plasmon resonance in luminescent materials based on Tb(III) and Ag or Au nanoparticles in silica xerogel

Journal of Non-Crystalline Solids, 2008

ABSTRACT Two-component material consisting of terbium(III) ions doping silica xerogel prepared by... more ABSTRACT Two-component material consisting of terbium(III) ions doping silica xerogel prepared by sol–gel procedure shows enhanced Tb(III) photoluminescence. We postulate that in this material the enhancement is owing to energy transfer from one of the defect states in silica to emitting states 3D3 and 5D4 of Tb(III).Surface plasmon resonance effect causes two contrary phenomena. Thus, if in the vicinity of the Tb(III) emission centers are present nanoparticles of Ag, observed is additional improvement of the Tb(III) emission. While, presence of Au nanostructures in the silica doped with Tb(III) causes quenching of the luminescence. In general, both the three-component materials exhibit enhancement of the component silica emission band in the resultant 380 nm band and relatively high thermal stability, especially above 600 °C.

Research paper thumbnail of The coordination state and valence state of selected transition metal ions in SiO2–B2O3 xerogels

Journal of Non-Crystalline Solids, 2002

Research paper thumbnail of Optical recognition elements. Macrocyclic imidazole chromoionophores entrapped in silica xerogel

Materials …, 2007

K. KLEDZIK 1, M. JAMRÓGIEWICZ 2, M. GWIAZDA 1, E. WAGNER-WYSIECKA 2, ... J. JEZIERSKA 3, JF BIERN... more K. KLEDZIK 1, M. JAMRÓGIEWICZ 2, M. GWIAZDA 1, E. WAGNER-WYSIECKA 2, ... J. JEZIERSKA 3, JF BIERNAT 2, AM KŁONKOWSKI 1* ... 1Faculty of Chemistry, University of Gdańsk, Sobieskiego 18, 80-952 Gdańsk, Poland ... 2Department of Chemical Technology, Gdańsk University ...

Research paper thumbnail of Luminescence recognition material as an INHIBIT logic gate in presence of Pb2+ and Cu2+ ions in aqueous solutions

A recognition material consisting of silica xerogel with amino-modified surface selectively recog... more A recognition material consisting of silica xerogel with amino-modified surface selectively recognizes
Pb2+ and Cu2+ (but only in presence of Pb2+ ions) in aqueous solutions of other metal ions. The analytical
action of the material is based on a significant change in luminescence emission spectra of the material
after chemisorption of Pb2+ ions. In the presence of Pb2+ in octahedral coordination environment, a new
broad and strong emission band appears which is peaking at 443 nm (exc = 236 nm) ascribed to electronic
transition in Pb2+ complex. On the other hand, the presence of Cu2+ cations causes significant depression
of the Pb2+ luminescence. The material plays a role of INHIBIT logic gate for both the mentioned cations.
Pb2+ can be analyzed quantitatively but Cu2+ only qualitatively in presence of Pb2+. The material can
be regenerated after chemisorption and is photochemically stable during UV illumination. Besides the
surface of the modified silica support is analyzed by SEM and XPS techniques and coordination sphere of
the chemisorbed Cu2+ ions is determined by electron paramagnetic resonance (EPR).

Research paper thumbnail of ChemInform Abstract: Copper(II) in Organically Modified Silicate Gels Prepared by the Sol- Gel Method

ChemInform, 1993

ABSTRACT ChemInform is a weekly Abstracting Service, delivering concise information at a glance t... more ABSTRACT ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.

Research paper thumbnail of Copper(II) in organically modified silicate gels prepared by the sol?gel method. Bulk complexed gels

Journal of Materials Chemistry, 1993

Two series (A and B) of organically modified silicate gels complexed with Cu II have been synthes... more Two series (A and B) of organically modified silicate gels complexed with Cu II have been synthesized by a twostep reaction procedure:(1) coordination,(2) sol–gel process. Series A consists of unidentate ligands [L]= H 2 N (CH 2) 3 SiO 3/2 and series B of bidentate ...

Research paper thumbnail of Energy transfer and surface plasmon resonance in luminescent materials based on Tb(III) and Ag or Au nanoparticles in silica xerogel

Journal of Non Crystalline Solids, Oct 1, 2008

ABSTRACT Two-component material consisting of terbium(III) ions doping silica xerogel prepared by... more ABSTRACT Two-component material consisting of terbium(III) ions doping silica xerogel prepared by sol–gel procedure shows enhanced Tb(III) photoluminescence. We postulate that in this material the enhancement is owing to energy transfer from one of the defect states in silica to emitting states 3D3 and 5D4 of Tb(III).Surface plasmon resonance effect causes two contrary phenomena. Thus, if in the vicinity of the Tb(III) emission centers are present nanoparticles of Ag, observed is additional improvement of the Tb(III) emission. While, presence of Au nanostructures in the silica doped with Tb(III) causes quenching of the luminescence. In general, both the three-component materials exhibit enhancement of the component silica emission band in the resultant 380 nm band and relatively high thermal stability, especially above 600 °C.

Research paper thumbnail of The local environment of Cu2+ ions incorporated into oxide glasses by ion exchange

Journal of Non Crystalline Solids, 1988

Research paper thumbnail of P029 Wpływ preparatyki katalizatorów palladowych otrzymanych metodą zol-żel na ich właściwości powierzchniowe

Research paper thumbnail of P011 Catalyst precursors consisting of Pd nanoparticles embedded on mesoporous carriers

Research paper thumbnail of Functions of Eu 3+ ions in materials with CdS nanoparticles and oxide matrices

Research paper thumbnail of Quantum size effect and energy transfer in the system: CdS nanoparticles and Tb(III) ions in oxide xerogels

Physics and Chemistry of Glasses

... NaY nano-SiO2 silica MCM-48 CH3-SiO2 Emission in ten sity I / arb. units ... Lett., 1995, 66,... more ... NaY nano-SiO2 silica MCM-48 CH3-SiO2 Emission in ten sity I / arb. units ... Lett., 1995, 66, 1316. 7. Brus, LE J. Chem. Phys., 1983, 79, 5566. 8. Baral, S., Fojtik, A., Weller, H. & Henglein, A. J. Am. Chem. Soc., 1986, 108, 375. 9. Koch, U., Fojtik, A., Weller, H. & Henglein, A. Chem. ...

Research paper thumbnail of Luminescence of Doped Nanoparticles of Wide Band Gap II-VI Compounds

Solid State Phenomena, 2007

... T. Strachowski 4,d and W. Łojkowski 4,e 1 Institute of Physics, Polish Acad. of Sciences, Al.... more ... T. Strachowski 4,d and W. Łojkowski 4,e 1 Institute of Physics, Polish Acad. of Sciences, Al. Lotników 32/46, 02-668 Warsaw, Poland 2 Department of Mathematics &amp;amp; Natural Science College of Science, Cardinal Stefan Wyszyński University, ul. ...

Research paper thumbnail of <title>Chemical recognition phase of the fluorescence chemical sensor for copper (II) ions in aqueous solution</title>

Optoelectronic and Electronic Sensors IV, 2001

ABSTRACT

Research paper thumbnail of <title>Chemical recognition phase and its action in an optical chemical sensor</title>

Optoelectronic and Electronic Sensors III, 1999

ABSTRACT

Research paper thumbnail of A New Fluorescent Chemosensor for Cu 2+ Based on a Dianthracene-Derivative

Supramolecular Chemistry, 2000

Besides being of interest in photochemistry, photoinduced electron transfer (PET) is a process la... more Besides being of interest in photochemistry, photoinduced electron transfer (PET) is a process largely used in the design of fluorescent ion sensing molecules. One of the simplest systems is based on fluorescent aromatic groups linked to amino groups and proposed as possible fluorescent transition metal ion chemosensor [1]. In this case, the fluorescence of the fluorophore “ligths on” when the

Research paper thumbnail of Antenna effect in an oxide xerogel

Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 1998

ABSTRACT

Research paper thumbnail of Electron paramagnetic resonance spectra of Cu(II) at cross-linking points in organically modified silicate gels

Journal of Non-Crystalline Solids, 1992

ABSTRACT

Research paper thumbnail of The nature of the chemical bond in oxide glasses

Journal of Non-Crystalline Solids, 1987

ABSTRACT

Research paper thumbnail of Non-monotonic variations of some parameters in vitreous R2OSiO2 and R2OAl2O3SiO2 systems

Journal of Non-Crystalline Solids, 1985

ABSTRACT

Research paper thumbnail of Energy transfer and surface plasmon resonance in luminescent materials based on Tb(III) and Ag or Au nanoparticles in silica xerogel

Journal of Non-Crystalline Solids, 2008

ABSTRACT Two-component material consisting of terbium(III) ions doping silica xerogel prepared by... more ABSTRACT Two-component material consisting of terbium(III) ions doping silica xerogel prepared by sol–gel procedure shows enhanced Tb(III) photoluminescence. We postulate that in this material the enhancement is owing to energy transfer from one of the defect states in silica to emitting states 3D3 and 5D4 of Tb(III).Surface plasmon resonance effect causes two contrary phenomena. Thus, if in the vicinity of the Tb(III) emission centers are present nanoparticles of Ag, observed is additional improvement of the Tb(III) emission. While, presence of Au nanostructures in the silica doped with Tb(III) causes quenching of the luminescence. In general, both the three-component materials exhibit enhancement of the component silica emission band in the resultant 380 nm band and relatively high thermal stability, especially above 600 °C.

Research paper thumbnail of The coordination state and valence state of selected transition metal ions in SiO2–B2O3 xerogels

Journal of Non-Crystalline Solids, 2002

Research paper thumbnail of Optical recognition elements. Macrocyclic imidazole chromoionophores entrapped in silica xerogel

Materials …, 2007

K. KLEDZIK 1, M. JAMRÓGIEWICZ 2, M. GWIAZDA 1, E. WAGNER-WYSIECKA 2, ... J. JEZIERSKA 3, JF BIERN... more K. KLEDZIK 1, M. JAMRÓGIEWICZ 2, M. GWIAZDA 1, E. WAGNER-WYSIECKA 2, ... J. JEZIERSKA 3, JF BIERNAT 2, AM KŁONKOWSKI 1* ... 1Faculty of Chemistry, University of Gdańsk, Sobieskiego 18, 80-952 Gdańsk, Poland ... 2Department of Chemical Technology, Gdańsk University ...