F
Ferenc K. Kálmán
Researcher at University of Debrecen
Publications - 57
Citations - 1271
Ferenc K. Kálmán is an academic researcher from University of Debrecen. The author has contributed to research in topics: Ligand & Lanthanide. The author has an hindex of 18, co-authored 50 publications receiving 977 citations. Previous affiliations of Ferenc K. Kálmán include University of Orléans & University of Texas at Dallas.
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Journal ArticleDOI
Selective sensing of zinc ions with a PARACEST contrast agent
Journal ArticleDOI
Potentiometric and Relaxometric Properties of a Gadolinium-based MRI Contrast Agent for Sensing Tissue pH
Ferenc K. Kálmán,Ferenc K. Kálmán,Mark Woods,Peter Caravan,Paul Jurek,Marga Spiller,Gyula Tircsó,Róbert Király,Ernő Brücher,A. Dean Sherry,A. Dean Sherry +10 more
TL;DR: Examination of the nuclear magnetic relaxation dispersion and relaxivity temperature profiles, coupled with information from potentiometric titrations, shows that the amphoteric character of the phosphonate side chains enables rapid prototropic exchange between the single bound water of the complex with the bulk water thereby giving Gd1 a unique pH-dependent relaxivity that is quite useful for the pH mapping of tissues by MRI.
Journal ArticleDOI
Synthesis, potentiometric, kinetic, and NMR Studies of 1,4,7,10-tetraazacyclododecane-1,7-bis(acetic acid)-4,10-bis(methylenephosphonic acid) (DO2A2P) and its complexes with Ca(II), Cu(II), Zn(II) and lanthanide(III) ions.
Ferenc K. Kálmán,Zsolt Baranyai,Zsolt Baranyai,Imre Tóth,István Bányai,Róbert Király,Ernö Brücher,Silvio Aime,Xiankai Sun,A. Dean Sherry,Zoltan Kovacs +10 more
TL;DR: A cyclen-based ligand containing trans-acetate and trans-methylenephosphonate pendant groups, H 6DO2A2P, was synthesized and its protonation constants were determined by pH-potentiometry and (1)H NMR spectroscopy.
Journal ArticleDOI
Kinetic inertness of the Mn2+ complexes formed with AAZTA and some open-chain EDTA derivatives.
Ferenc K. Kálmán,Gyula Tircsó +1 more
TL;DR: The results of systematic equilibrium, kinetic, and relaxometric investigations carried out on the Mn(2+) complexes of open-chain and AAZTA ligands indicate that the [Mn(CDTA)](2-) complex has satisfactorily high kinetic inertness, which may allow its use as a contrast agent in the field of magnetic resonance imaging.
Journal ArticleDOI
Stable and Inert Mn(II)-Based and pH-Responsive Contrast Agents
TL;DR: The first example of a Mn(II) complex that can be activated by changing the pH of its local environment is reported, finding the PC2A-EA ligand with an ethylamine pendant arm to form thermodynamically stable and kinetically inert complex.