Selectivity in sodium borohydride reduction of coumarin encapsulated in β-cyclodextrin

Exploring Coumarins Reduction: NaBH4/MeOH versus Nickel Boride Generated In Situ.

“…Even if the reductant NaBH 4 /MeOH is known to induce both 1,4-and 1,2-hydride addition, [27] we did not observe the formation of an allylic alcohol resulting from an 1,2-hydride addition. Table 1 summarizes yields obtained for each substituted coumarin.…”

Enhanced photocatalytic activity of metal oxides/β-cyclodextrin nanocomposites for decoloration of Rhodamine B dye under solar light irradiation

“…Reported procedures were employed for the preparation of RhB/b-CD complex (Pitchumani et al 1994;Velusamy et al 2011Velusamy et al , 2014. To a saturated solution of b-CD in distilled water, equimolar amount of RhB dye was added and stirred continuously for 24 h. The precipitated inclusion complex was filtered and washed with diethyl ether to remove uncomplexed RhB dye and dried in an air oven at 60°C for 2-3 h. The precipitate thus obtained is used for the characterization of RhB/b-CD complex by FT-IR and 1 H NMR analyses.…”

“…Based on UV-absorption spectral studies (using the Benesi and Hildebrand equation) (Pitchumani et al 1994; …”

Modification of the photocatalytic activity of TiO2 by β-Cyclodextrin in decoloration of ethyl violet dye

“…Though IR measurements are not employed for detecting inclusion compounds (due to the superposition of host and guest bands), in some cases where the substrate has characteristic absorbance in the regions where β -CD does not absorb, IR spectrum is useful [32] . From the FT-IR spectra Fig.…”

“…The dissociation constant ( K D ) value for the complexation between β -CD and EV dye can be calculated using the Benesi–Hildebrand equation [32] . K D can be obtained from the ratio of the intercept ( K D /Δ ε ) and the slope (1/Δ ε ) from the linear plot of [C] [S]/Δ OD vs. {[C] + [S]} ( Fig.…”