30 research outputs found

    A New bis(rhodamine)-Based Fluorescent Chemosensor for Fe3+

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    A new bis(rhodamine)-based fluorescent probe 4 was synthesized, and it exhibited high selectivity for Fe3+ over other commonly coexistent metal ions in both 50% ethanol and Tris–HCl buffer. Upon the addition of Fe3+, the spirocyclic ring of 4 was opened and a significant enhancement of visible color and fluorescence in the range of 500–600 nm was observed

    A Homogeneous Chiral Manganese(III)-Salphe Catalyst for Enantioselective Epoxidation of Olefins

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    A new chiral Mn(III)-Salphe catalyst was synthesized from natural amino acid (R)-phenylalanine and 3,5-di-tert-butyl-hydroxybenzaldehyde and applied to the asymmetric epoxidations of unfunctionalized olefins in ionic liquids. Satisfactory enantioselectivities (79%</p
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