Thermodynamic and kinetic study of Copper(II) Complexes with
N-methylene(phenylphosphinic) Derivatives of Cyclen and Cyclam

J 2001

Thermodynamic and kinetic study of Copper(II) Complexes with N-methylene(phenylphosphinic) Derivatives of Cyclen and Cyclam

LUBAL, Přemysl, Mojmír KÝVALA, Petr HERMANN, Jana HOLUBOVÁ, Jan ROHOVEC et. al.

Základní údaje

Originální název

Thermodynamic and kinetic study of Copper(II) Complexes with N-methylene(phenylphosphinic) Derivatives of Cyclen and Cyclam

Autoři

LUBAL, Přemysl, Mojmír KÝVALA, Petr HERMANN, Jana HOLUBOVÁ, Jan ROHOVEC, Josef HAVEL a Ivan LUKEŠ

Vydání

Polyhedron, Velká Británie, Elsevier Science Ltd. 2001, 0277-5387

Další údaje

Jazyk

angličtina

Typ výsledku

Článek v odborném periodiku

Obor

10402 Inorganic and nuclear chemistry

Stát vydavatele

Nizozemské království

Utajení

není předmětem státního či obchodního tajemství

Impakt faktor

Impact factor: 1.200

Kód RIV

RIV/00216224:14310/01:00002919

Organizační jednotka

Přírodovědecká fakulta

Klíčová slova anglicky

polyazamacrocycles phosphinic acids; cyclen and cyclam derivatives; copper(II) complexes; potentiometry; kinetics; stability constants

Štítky

copper(II) complexes, cyclen and cyclam derivatives, kinetics, polyazamacrocycles phosphinic acids, potentiometry, Stability Constants

Změněno: 24. 10. 2001 13:10, prof. RNDr. Přemysl Lubal, Ph.D.

Anotace

V originále

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.

Návaznosti

GA203/97/0252, projekt VaV

Název: Makrocyklické azacykly obsahující fosfinovou skupinu. Syntéza a komplexotvorné vlastnosti

Investor: Grantová agentura ČR, Makrocyklické azacykly obsahující fosfinovou skupinu. Syntéza a komplexotvorné vlastnosti

MSM 143100011, záměr

Název: Struktura a vazebné poměry, vlastnosti a analýza syntetických a přírodních molekulových ansamblů

Investor: Ministerstvo školství, mládeže a tělovýchovy ČR, Struktura a vazebné poměry, vlastnosti a analýza syntetických a přírodních molekulových ansamblů

Citovat

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. Polyhedron. Velká Británie: Elsevier Science Ltd., 2001, roč. 20, č. 1, s. 47-55. ISSN 0277-5387.

@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. \textit{Polyhedron}. Velká Británie: Elsevier Science Ltd., 2001, roč.~20, č.~1, s.~47-55. ISSN~0277-5387.

Podrobný výpis o publikaci