Related Products of 33100-27-5. Let’s face it, organic chemistry can seem difficult to learn. Especially from a beginner’s point of view. Like 33100-27-5, Name is 1,4,7,10,13-Pentaoxacyclopentadecane. In a document type is Article, introducing its new discovery.
A novel method has been developed to enhance the sensitivity and selectivity of the thermal lens detection of lanthanide Ions. In this method, the rare-earth ions were selectively extracted from water to organic solvent with the use of crown ether, e.g., 18-crown-6, 15-crown-5 as synergistic extractant. The thermal lens signal intensity of the extracted ions in the organic phase can be enhanced up to 24-fold. This enhancement is due to the fact that the thermal lens signal is dependent on the thermooptical properties of the solvent, and water is a poor thermooptical solvent (low dn/dT and high thermal conductivity, k, values), whereas organic solvents are good themooptical media (high dn/dT and low k values). The well-defined cavities of the crown ethers restrict their complex formation (and hence solvent extraction) only with the rare-earth ions whose sizes are comparable to their cavities, and this is the origin for the improvement in the selectivity. For Instance, with the use of 18-crown-6, up to 41% of the Er3+ ion can be extracted from water to chloroform, whereas the extraction yield for the Pr3+ ion, under the same experimental conditions, was only 28%. The thermal lens technique was used to determine the stoichiometry of the extracted ion pair complexes.
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