| LUBAL, Přemysl, Mojmír KÝVALA, Petr HERMANN, Jana HOLUBOVÁ, Jan ROHOVEC, Josef HAVEL a Ivan LUKEŠ. Thermodynamic and kinetic study of Copper(II) Complexes with N-methylene(phenylphosphinic) Derivatives of Cyclen and Cyclam. Online. Polyhedron. Velká Británie: Elsevier Science Ltd., 2001, roč. 20, č. 1, s. 47-55. ISSN 0277-5387. [citováno 2024-04-23] |
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@article{350672,
author = {Lubal, Přemysl and Kývala, Mojmír and Hermann, Petr and Holubová, Jana and Rohovec, Jan and Havel, Josef and Lukeš, Ivan},
article_location = {Velká Británie},
article_number = {1},
keywords = {polyazamacrocycles phosphinic acids; cyclen and cyclam derivatives; copper(II) complexes; potentiometry; kinetics; stability constants},
language = {eng},
issn = {0277-5387},
journal = {Polyhedron},
title = {Thermodynamic and kinetic study of Copper(II) Complexes with N-methylene(phenylphosphinic) Derivatives of Cyclen and Cyclam},
volume = {20},
year = {2001}
}
TY - JOUR
ID - 350672
AU - Lubal, Přemysl - Kývala, Mojmír - Hermann, Petr - Holubová, Jana - Rohovec, Jan - Havel, Josef - Lukeš, Ivan
PY - 2001
TI - Thermodynamic and kinetic study of Copper(II) Complexes with N-methylene(phenylphosphinic) Derivatives of Cyclen and Cyclam
JF - Polyhedron
VL - 20
IS - 1
SP - 47
EP - 47
PB - Elsevier Science Ltd.
SN - 02775387
KW - polyazamacrocycles phosphinic acids
KW - cyclen and cyclam derivatives
KW - copper(II) complexes
KW - potentiometry
KW - kinetics
KW - stability constants
N2 - Equilibria of Cu(II) with newly synthetised ligands H4L1 and H4L2 were investigated by the glass electrode potentiometry at 25 degrees of Celsius and I = 0.1 M KNO3. A simple chemical model with metal:ligand molar ratio 1:1 was found in the systems. Presence of main species , CuL1 (log Beta = 20.37(4)) and CuL2 (log Beta = 17.19(2)) was also confirmed by MALDI-TOF/MS. The dissociation kinetics of the complexes was followed by spectrophotometry and mechanism of the dissociation was proposed. Activation parameters (activation enthalpy and entropy) of the dissociation were estimated. For Cu(II)-H4L1 system, the complex dissociation starts after protonization of phosphinic pendant arms and its mechasnism is similar to the decomplexation of [Cu(cyclen)]2+. The complex with H4L2 is kinetically much less stable and the proton transfer from phosphinic pendant arm to the azacycle plays a significant role in the reaction mechanism.
ER -
LUBAL, Přemysl, Mojmír KÝVALA, Petr HERMANN, Jana HOLUBOVÁ, Jan ROHOVEC, Josef HAVEL a Ivan LUKEŠ. Thermodynamic and kinetic study of Copper(II) Complexes with N-methylene(phenylphosphinic) Derivatives of Cyclen and Cyclam. Online. \textit{Polyhedron}. Velká Británie: Elsevier Science Ltd., 2001, roč.~20, č.~1, s.~47-55. ISSN~0277-5387. [citováno 2024-04-23]
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