Structural Rigidity and Luminescence of Chiral Lanthanide Tetraamide Complexes Based on 1,4,7,10-Tetraazacyclododecane
✍ Scribed by Rachel S. Dickins; Prof. Judith A. K. Howard; Dr. Christian W. Lehmann; Janet Moloney; Prof. David Parker; Dr. Robert D. Peacock
- Publisher
- John Wiley and Sons
- Year
- 1997
- Tongue
- English
- Weight
- 374 KB
- Volume
- 36
- Category
- Article
- ISSN
- 0044-8249
No coin nor oath required. For personal study only.
✦ Synopsis
Substitution reactions of 1 he square-planar complexes are typically associative: R. J. Cross, A h , . Inorg. Chem. 1989, 34, 219. [23] Palladium(n) halide complexes o f general formula [RPdC1(N-N')(q2-alkene)] are well known and have been crystallographically characterized: V. G. Albano, C. Caatellari. M. E. Cucciolito, A. Panuzi, A. Vitnlgliano, Orgunonzelulhc,y, 1990. 9. 1269. [24] This step could he either the formation of a pentacoordinate intermediate from 5 or the evolution of a pentacoordinate intermediate to 7. The first irreversible enantiodifferentiating step would determine asymmetric induction: C. R. Landis, J. Halpern, J An7. Chem. Soc. 1987, IOY, 425. [25] There arc scattered reports of various effects of halide additives on Heck reactions o f triflates: a) modified regioselection: C M.
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## Abstract The protonation constants of 2‐[4,7,10‐tris(phosphonomethyl)‐1,4,7,10‐tetraazacyclododecan‐1‐yl]acetic acid (H~7~DOA3P) and of the complexes [Ln(DOA3P)]^4−^ (Ln=Ce, Pr, Sm, Eu, and Yb) have been determined by multinuclear NMR spectroscopy in the range pD 2–13.8, without control of ionic
## Abstract The ligand H~5~dotasa (=(__αRS__)‐__α__‐(carboxymethyl)‐1,4,7,10‐tetraazacyclododecane‐1,4,7,10‐tetraacetic acid) is a H~4~dota‐like macrocyclic ligand with a carboxymethyl CH~2~COOH substituent at the C(__α__) atom of one of the four acetate pendant arms of H~4~dota (=1,4,7,10‐tetraaza
## Abstract Complexation of the lanthanides Eu^3+^, Gd^3+^, and Tb^3+^ with 1,4,7,10‐tetrakis(carboxymethyl)‐1,4,7,10‐tetraazacyclododecane (dota) has been studied in solution by using potentiometry, luminescence spectrometry, and EXAFS. Three series of successive complexes were characterized by at