Ligands for EuIII, FeIII, SrII, and UO2II Based on CMPO-Functionalized Resorcinarene Cavitands; Synthesis and Extraction
✍ Scribed by Boerrigter, Harold ;Verboom, Willem ;Reinhoudt, David N.
- Book ID
- 102902600
- Publisher
- John Wiley and Sons
- Year
- 1997
- Tongue
- English
- Weight
- 896 KB
- Volume
- 1997
- Category
- Article
- ISSN
- 0947-3440
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✦ Synopsis
result in decreasing extraction percentages for Eu"', also de-Partially functionalized cavitands (7a-d) have been synthe-crease the selectivity of Eu"' over that of Fe"', Sr", and UO?. sized starting from the tetrakis(bromomethy1)cavitand 6. There is a difference in extraction behavior, determined by New cavitand-based cation ligands, with one to three carba-radio-tracer experiments, between the distal and proximal moylmethylphosphane oxide (CMPO) moieties ( l l a -d ) , disubstituted ligands, l l b and l l c , respectively. The extracwere prepared in good (66-90%) yields. The ligands l l a -d tion constants for the 1:l complex of l l b and l l c with Euextract Eu"', but do so less effectively than the tetra-CMPO (picrate)3 are K,, = 6.7 . lo8 M -~ and 3.7 . lo9 MP4, respeccavitand 1. The decreasing number of CMPO groups which tively.