Chiral Catalytic Membranes

Abstract

COMMUNICATIONS spectroscopy the concentrations of the reactants were chosen 15 times higher (about 0 . 3~) , which is the upper limit of solubility for the compounds I b. Id. and l e .

Heterogeneous Green Catalyst for Oxidation of Cyclohexene and Cyclooctene with Hydrogen Peroxide in the Presence of Host (Nanocavity of Y‐zeolite)/Guest (N4‐Cu(II) Schiff Base Complex) Nanocomposite Material

“…A sharp color change (red-gray) of complex was observed on being immobilized in Cu-NaY, such phenomena were rarely observed when metal complexes are encapsulated in zeolites. 14,[29][30][31] The percentages of metal contents were determined before and after encapsulation ( Table 1). The chemical analyses of the sample reveal the presence of organic matter with a C/N ratio roughly similar to that for neat complex.…”

Polymer-supported salen complexes for heterogeneous asymmetric synthesis: Stability and selectivity

“…4,5 The methods used to generate solid chiral catalysts have included a photoactivation of reactants within a chiral crystalline environment, 6 -8 an inclusion of metals or metal oxides within a host along with a chiral modifier, 9,10 and a ligation or incorporation of a homogeneous catalyst within a support. 1,[11][12][13][14][15] This latter set of catalysts-the so-called heterogenized homogeneous catalystscombines the processing advantages of a heterogeneous catalyst and the potential selectivities of the homogeneous catalysts. In practice, tethering a homogeneous catalyst to a support can introduce specific challenges.…”

Aspects of Immobilisation of Catalysts on Polymeric Supports

“…[209] The results indirectly confirm the preservation of the intact structure of a TMC in PDMS, since an excessively strong interaction between the polymer and the complex would have destroyed the chiral induction. PVA was later reported as a useful alternative for PDMS.…”