74567-64-9Relevant academic research and scientific papers
Luminescence of lanthanides in complexes with chromophoric crown ethers
Korovin,Rusakova,Popkov
, p. 2303 - 2305 (2007/10/03)
Spectral luminescence characteristics, viz., quantum yields and luminescence lifetime, of the Yb3+ and Nd3+ ions in aqueous-methanolic solutions of their complexes with chromophoric benzo-15-crown-5 derivatives were determined. The e
SYNTHESIS OF CROWN ETHER DYES.
Yamashita,Nakamura,Takagi,ueno
, p. 1550 - 1554 (2007/10/02)
Crown ether dyes were synthesized in order to develop photometric reagents which are highly selective to alkali and alkaline earth metals. They contain dissociable protons attached to the chromophores of crown ether molecule. Their extraction behavior for alkali and alkaline earth metal ions as neutral complex was examined. The dyes extract potassium and alkalin earth metals, respectively. Dyes with picrylamino chromosphore are effective for extractive photometric determination of potassium. A molecular design of colorimetric reagents is discussed on the basis of crown ethers.
