Cinchona Alkaloid Derivatives modified Fe3O4 Nanoparticles for Enantioselective Ring Opening of meso- Cyclic Anhydrides

In the present work, the molecular framework of the quinidine was modified at the methoxy functional of C6’ carbon of quinoline moiety with a long-chain carboxylic acid group (-COOH) and...

Influence of methyl group in a quinoline moiety on optical and light-induced properties of side-chain azo-polymers

We present the optical and photochromic properties as well as surface quality of thin films of the methacrylic copolymers containing 2-methylquinoline and quinoline azo-dyes in side chain. The extinction coefficient and refractive index were determined using spectroscopic ellipsometry combined with transmittance measurements. Photo-responsive behavior was investigated by determination of trans–cis photoisomerization rates under irradiation with unpolarized 365 nm light. We found that optical properties as well as photoisomerization rates of investigated polymers are dependent on the presence of a methyl substituent in the 2nd position of the quinoline moiety. The quality of the thin films was examined using Atomic Force Microscopy measurements.

Activatable Near-Infrared Fluorescence Probe Facilitated High-contrast Lipophagic Imaging in Live Cells

A new fluorescence probe (Q-lipo) was developed by conjugating a xanthene scaffold with a quinoline moiety for activatable imaging of lipophagy. Q-lipo with acidic pH activated near infared fluorescence and...

Catalytic Oxidation of Quinine Using Hydrogen Peroxide with Palladium as Catalyst

The oxidation of quinine using hydrogen peroxide yielded quinine N-oxide as a major product. The reaction can be accelerated in the presence of palladium chloride (PdCl2) as catalyst. The trace products, however, were identified as the further oxidation products at quinoline moiety producing N-Oxide as a major product and the secondary alcohol at C-9 producing the ketone, furthermore the alkene translocation product. The trace products were successfully isolated and characterized by NMR protons and carbons. Purification of the product was performed by column chromatography.