000142493 001__ 142493
000142493 005__ 20190316234642.0
000142493 0247_ $$2doi$$a10.1002/hlca.200900117
000142493 02470 $$2ISI$$a000272434000003
000142493 037__ $$aARTICLE
000142493 245__ $$aMultiple Frequency and Variable Temperature EPR study of Gd(III) polyaminocarboxylates: analysis and comparison of the magnetically dilute powder and the frozen solution spectra
000142493 269__ $$a2009
000142493 260__ $$c2009
000142493 336__ $$aJournal Articles
000142493 520__ $$aAn Electron Paramagnetic Resonance (EPR) study of glasses and magnetically dilute powders of [Gd(DTPA)(H2O)]2−, [Gd(DOTA)(H2O)]-, and macromolecular Gd-P792 complexes was carried out at X-, Q-band and 240 GHz DTPA=diethylenetriaminepentaacetato; DOTA=1,4,7,10-tetraazacyclododecane-1,4,7,10-tetraacetato). The results show that the zero-field splitting parameters for these complexes are quite different in a powder as compared to the frozen aqueous solution. In several complexes an inversion of the sign of the axial component D of the zero field splitting is observed, indicating a significant structural change. In contrary to what has been expected, powder sample do not allow a more precise determination of the static ZFS parameters in the powders obtained by liophilization. The results obtained in glasses are more relevant to the problem of electron spin relaxation in aqueous solution than those obtained from powders.
000142493 6531_ $$aMagnetic-resonance imaging (MRI)
000142493 6531_ $$aGadolinium complexes
000142493 6531_ $$aContrast agents
000142493 6531_ $$aElectron paramagnetic resonance (EPR) spectroscopy
000142493 6531_ $$aMagnetically dilute powders
000142493 6531_ $$aDTPA
000142493 6531_ $$aDOTA
000142493 700__ $$0241096$$g148807$$aBenmelouka, Meriem
000142493 700__ $$aVan Tol, Johan
000142493 700__ $$0240739$$g148230$$aBorel, Alain
000142493 700__ $$aNellutla, Saritha
000142493 700__ $$aPort, Marc
000142493 700__ $$0240250$$g144957$$aHelm, Lothar
000142493 700__ $$aBrunel, Louis-Claude
000142493 700__ $$aMerbach, André E.$$g123257$$0241569
000142493 773__ $$j92$$tHelvetica Chimica Acta$$q2173-2185
000142493 8564_ $$zURL
000142493 8564_ $$uhttps://infoscience.epfl.ch/record/142493/files/Benmelouka_EPR_paper.pdf$$zn/a$$s613092
000142493 8564_ $$uhttps://infoscience.epfl.ch/record/142493/files/Helv92-2173.pdf$$zn/a$$s293800
000142493 909C0 $$xU10103$$0252059$$pLCIB
000142493 909CO $$ooai:infoscience.tind.io:142493$$qGLOBAL_SET$$pSB$$particle
000142493 917Z8 $$x148230
000142493 937__ $$aLCIB-ARTICLE-2009-007
000142493 973__ $$rREVIEWED$$sPUBLISHED$$aEPFL
000142493 980__ $$aARTICLE