Water exchange studies of lanthanide complexes and aqua ions
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A review on the available candidates in the quest for the least coordinating anion and a summary of new applications, available starting materials, and general strategies to introduce a WCA into a system. Some of the unusual properties of WCA salts such as ...
An Ia mechanism was assigned for water exchange on the hexaaquaions Rh(OH2)63+ and Ir(OH2)63+ on the basis of negative ΔV⧧ experimental values (−4.2 and −5.7 cm3 mol-1, respectively). The use of ΔV⧧ as a mechanistic criterion was open to debate primarily b ...
The stability and water exchange dynamics of gadolinium (GdIII) complexes are critical characteristics that determine their effectiveness as contrast agents for magnetic resonance imaging (MRI). A new heteropodal GdIII chelate, [Gd-TREN-bis(6-Me-HOPO)-(TAM ...
The synthesis of the potentially nonadentate ligand 1,4,7-tris[(6-carboxypyridin-2-yl)methyl]-1,4,7-triazacyclononane (H3tpatcn), a new derivative of 1,4,7-triazacyclononane N-functionalised with three pyridinecarboxylate arms, is described. The complexes ...
Patients with hemispatial neglect restricted to near (within reaching distance) or to far space (beyond reaching distance) have been described. This constitutes a double-dissociation considered by current neurocognitive thinking as compelling evidence for ...
A new global analysis of EPR, 17O NMR relaxation and chemical shift and 1H NMRD profiles with physically meaningful parameters for [Gd(DOTA)(H2O)]− and for [Gd(DTPA)(H2O)]2− in aqueous solution is presented (DOTA=1,4,7,10-tetraaza-1,4,7,10-tetrakis(carboxy ...
The photophysical properties of the triple-stranded dimetallic helicates [Ln2(LC−2H)3]·H2O (Ln = Nd, Sm, Dy, Yb) are determined in water and D2O solutions, and energy transfer processes are modeled for SmIII. The luminescence of NdIII, SmIII, and YbIII is ...
The molecular complex [Re(equivalent toC(t)Bu)(=(CHBu)-Bu-t)((CH2Bu)-Bu-t)2] (1) reacts with a silica partially dehydroxylated at 700 degreesC to give syn-2, [(equivalent toSiO)Re(equivalent toC(t)Bu)(=(CHBu)-Bu-t)((CH2Bu)-Bu-t)], as a single isomer accord ...
Classical molecular dynamics simulations with a force field adapted to the family of Gd3+ polyaminocarboxylate complexes have been successfully applied on two macrocyclic ([Gd(DOTA)(H2O)]- and [Gd(DO3A)(H2O)2]) and two acyclic ([Gd(DTPA)(H2O)]2- and [Gd(EG ...
The invention relates to a novel class of ligands, complexes comprising such ligands and a metal ion, and adducts of these metal complexes and a macromolecule. Pharmaceutical compositions and methods of making and using the ligand-metal complexes are also ...