Kinetic study of dissociation of Eu(III) complex with H(8)dotp (H(8)dotp=1,4,7,10-tetraazacyclododecane-1,4,7,10-tetrakis(methylphosphonic acid))

PISKULA, Zbigniew, Ivona SVOBODOVÁ, Přemysl LUBAL, Stefan LIS, Zbigniew HNATEJKO and Petr HERMANN. Kinetic study of dissociation of Eu(III) complex with H(8)dotp (H(8)dotp=1,4,7,10-tetraazacyclododecane-1,4,7,10-tetrakis(methylphosphonic acid)). Inorganica Chimica Acta. Oxford, UK: Elsevier Science, 2007, vol. 360, No 12, p. 3748-3755. ISSN 0020-1693.

Basic information

• Original name: Kinetic study of dissociation of Eu(III) complex with H(8)dotp (H(8)dotp=1,4,7,10-tetraazacyclododecane-1,4,7,10-tetrakis(methylphosphonic acid))
• Name in Czech: Kinetické studium disociace Eu(III) komplexu s H8dotp
• Authors: PISKULA, Zbigniew (616 Poland), Ivona SVOBODOVÁ (203 Czech Republic), Přemysl LUBAL (203 Czech Republic, guarantor), Stefan LIS (616 Poland), Zbigniew HNATEJKO (616 Poland) and Petr HERMANN (203 Czech Republic).
• Edition: Inorganica Chimica Acta, Oxford, UK, Elsevier Science, 2007, 0020-1693.

Other information

• Original language: English
• Type of outcome: Article in a journal
• Field of Study: 10406 Analytical chemistry
• Country of publisher: Netherlands
• Confidentiality degree: is not subject to a state or trade secret
• Impact factor: Impact factor: 1.713
• RIV identification code: RIV/00216224:14310/07:00033209
• Organization unit: Faculty of Science
• UT WoS: 000249540800013
• Keywords in English: macrocyclic complexes; cyclen derivatives; phosphonate complex; Europium(III) complex; dissociation kinetics; molecular absorption spectroscopy; time-resolved laser-induced fluorescence spectroscopy (TRLIFS)
• Tags: cyclen derivatives, DISSOCIATION KINETICS, Europium(III) complex, macrocyclic complexes, molecular absorption spectroscopy, phosphonate complex
• Tags: International impact, Reviewed

Abstract

The dissociation kinetics of the europium(III) complex with H8dotp ligand was studied by means of molecular absorption spectroscopy in UV region at ionic strength 3.0 mol dm-3 (Na,H)ClO4 and in temperature region 25-60 degrees C. Time-resolved laser-induced fluorescence spectroscopy (TRLIFS) was employed in order to determine the number of water molecules in the first coordination sphere of the europium(III) reaction intermediates and the final products. This technique was also utilized to deduce the composition of reaction intermediates in course of dissociation reaction simultaneously with calculation of rate constants and it demonstrates the elucidation of intimate reaction mechanism. The thermodynamic parameters for the formation of kinetic intermediate and the activation parameters for the rate-determining step describing the complex dissociation were determined. The mechanism of proton-assisted reaction was proposed on the basis of the experimental data.

Abstract (in Czech)

Disociační kinetika Eu(III) komplexu s H8dotp ligandem byla studována pomocí mol. abs. spektroskopie při iont. síle 3.0 mol dm-3 (Na,H)ClO4 and t = 25-60 st. C. TRLIFS byla použita pro stanovení počtu molekul vody koordinovaných v první koord. sféře Eu(III) v reakčních intermediátech a produktech. Tato technika byla také použita k dedukci složení reakčních intermediátů v průběhu disociační reakce souběžně s výpočtem rychlostních konstant a ukazuje možné využití pro detailní výzkum reakčního mechanismu. Termodynamické parametry pro vznik kinetického intermediátu a aktivační parametry pro rychlost určující reakční krok byly stanoveny a reakční mechanismus byl navržen na základě experimentálních dat.

Links

• OC 179, research and development project: Name: Molekulární zobrazování založené na systémech obsahujících kovy.