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Details van artikel 9 van 13 gevonden artikelen
| Titel: |
Synthesis and Characteristics of a Europium(III) Complex of N, N, N',' N'''-Tetrakis(2-Quinolinemethyl-1-Oxide)-1,4,8,H-Tetraazacyclotetradecane |
| Auteur: |
Pietraszkiewicz, Marek Karpiuk, Jerzy Bilewicz, Renata Kasprzyk, Stanislaw P. |
| Verschenen in: |
Journal of coordination chemistry |
| Paginering: | Jaargang 21 (1990) nr. 1 pagina's 75-80 |
| Jaar: |
1990-01-01 |
| Inhoud: |
Reaction of 1,4,8,11-tetraazacyclotetradecane (cyclam) with 2-chloromethylquinoline-1-oxide leads to the formation of the tetrasubstituted title compound which forms a stable 1:1 complex with europium perchlorate. Cyclic voltammetric studies of the complex in MeCN solution revealed reversibility of the Eu(III)/Eu(II) couple. The formal potential, Et, of Eu(IlI)/Eu(II) in the complex was found to be—0.510 V. The difference between log KEuIII and log KEuIII is 4.83, showing much higher stability for EuIII complex, at 25°C. Photochemcial studies of the uncomplexed ligand revealed an absence of fluorescence of the ligand itself upon excitation at 333 nm, and a phosphorent 0-0 transition was observed at 77 K at 433 nm, indicating that the energy level of the triplet state T1 lies above the resonance level 5D of the Eu(III) cation. The complex appeared to be non-luminescent when irradiated at 328 and 360 nm. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 9 van 13 gevonden artikelen
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