16543-43-4Relevant articles and documents
A Chromogenic Crown Ether as a Sensing Molecule in Optical Sensors for the Detection of Hard Metal Ions
Gent, Jos van,Sudhoelter, Ernst J. R.,Lambeck, Paul V.,Popma, Theo J. A.,Gerritsma, Gerrit J.,Reinhoudt, David N.
, p. 893 - 895 (1988)
A new chromogenic crown ether based on a merocyanine dye and a phenolic crown ether shows a striking selectivity for calcium or barium complexation and has a potential use in optical sensors.
Dramatic influence of the nature of the surfactant aggregate on the rate constant for hydrolysis of phosphinate esters in aqueous nematic lyotropic liquid crystals
Ramesh,Labes
, p. 738 - 741 (2007/10/02)
The o-iodosobenzoic acid catalyzed hydrolysis of two organophosphinate esters has been studied in the lyotropic nematic phases of myrystyltrimethylammonium bromide in 1-decanol, ammonium bromide, and water. Depending on the concentration of these ingredients, three phases are observed at room temperature consisting of rod-like (N//C), disk-like (N//L), or sphere-like (I) aggregates. There is a three order of magnitude difference in the rate constant for hydrolysis between N//L and N//C phases. The N//L phase serves as a protective environment, preventing the hydrolysis of the ester, whereas the N//C phase allows the reaction to occur rapidly. Based upon infrared evidence, the phosphinate ester is solubilized in the hydrocarbon region of N//L aggregates, but in N// C and I aggregates the solute is nearer the aqueous interface.
