The time-resolved fluorescence study of kinetics and thermodynamics of Eu(III) and Tb(III) complexes with the DO2A macrocyclic ligand

SMRČKA, Filip and Přemysl LUBAL. The time-resolved fluorescence study of kinetics and thermodynamics of Eu(III) and Tb(III) complexes with the DO2A macrocyclic ligand. New Journal of Chemistry. Cambridge: ROYAL SOC. CHEMISTRY, 2018, vol. 42, No 10, p. 7993-8000. ISSN 1144-0546. Available from: https://dx.doi.org/10.1039/c8nj00255j.

Basic information

• Original name: The time-resolved fluorescence study of kinetics and thermodynamics of Eu(III) and Tb(III) complexes with the DO2A macrocyclic ligand
• Authors: SMRČKA, Filip (203 Czech Republic, belonging to the institution) and Přemysl LUBAL (203 Czech Republic, guarantor, belonging to the institution).
• Edition: New Journal of Chemistry, Cambridge, ROYAL SOC. CHEMISTRY, 2018, 1144-0546.

Other information

• Original language: English
• Type of outcome: Article in a journal
• Field of Study: 10402 Inorganic and nuclear chemistry
• Country of publisher: United Kingdom of Great Britain and Northern Ireland
• Confidentiality degree: is not subject to a state or trade secret
• WWW: URL
• Impact factor: Impact factor: 3.069
• RIV identification code: RIV/00216224:14310/18:00101195
• Organization unit: Faculty of Science
• Doi: http://dx.doi.org/10.1039/c8nj00255j
• UT WoS: 000434245500053
• Keywords in English: LANTHANIDE(III) COMPLEXES; METAL COMPLEXES; LUMINESCENCE; DISSOCIATION; EQUILIBRIA; STABILITY; PROBES; SENSOR
• Tags: rivok
• Tags: International impact, Reviewed

Abstract

The thermodynamics of the interaction of the H(2)DO2A (= 1,4,7,10-tetraazacyclododecane-1,7-diacetic acid) macrocyclic ligand with both Eu(III) and Tb(III) ions was studied by means of luminescence spectroscopy in steady-state and time-resolved modes. It was shown that it is possible to calculate stability constants for both complexes that agree with values determined by other experimental techniques. The study of the formation and dissociation of both Ln(III) complexes shows that there is no significant difference in their reactivity if they contain three (Eu) or two (Tb) water molecules in their coordination shell. The two species of ligands present in the formation reaction, HL- and L2-, differ in their reactivity, which can be explained by the difference in charge and the presence of a proton in the macrocyclic cavity. A detailed study of the dissociation reaction proved that the reaction mechanism consists of several pathways of intermediates, which differ in their structure and rate of decomposition.

Links

• GA13-08336S, research and development project: Name: Hybridní materiály založené na makrocyklických ligandech pro využití v medicíně

Investor: Czech Science Foundation

• LQ1601, research and development project: Name: CEITEC 2020 (Acronym: CEITEC2020)

Investor: Ministry of Education, Youth and Sports of the CR

• MUNI/A/1237/2016, interní kód MU: Name: Vývoj metod a instrumentace pro analýzu biologicky významných látek 2017

Investor: Masaryk University, Category A