Chinese Journal of Chemistry

The hierarchical pore channels enhanced multiple scattering and reflections. Numerous defects induced defect polarization. Functional groups led to the formation of dipole polarization. Heterogeneous interfaces caused interfacial polarization. Electron migration and hopping improved conductive loss. Magnetic nanoparticles promoted magnetic loss.

A unique structural transformation from a 3D metal−organic framework (MOF) to a 2D framework through cucurbit[6]uril (CB[6])-mediated coordination bond rearrangement is reported. The resulting 2D MOF with ordered CB[6] arrays exhibits enhanced chemical stability via selective guest encapsulation, and high catalytic efficiency for CO₂ cycloaddition with diverse epoxides under mild conditions.

A novel visible-light-driven protocol has been established for the direct difunctionalization of unactivated alkenes using arylhydrazines and H-phosphine oxides as dual-function reagents. Through visible-light photocatalysis, phosphonyl radicals are generated as key intermediates, which undergo a cascade process involving radical addition, single-electron oxidation, and dehydration coupling to achieve the in-situ construction of C–P and C=N–N bonds. The method demonstrates broad substrate compatibility with excellent functional group tolerance, delivering β-phosphinoyl hydrazones in moderate to good yields.

An NHC-catalyzed asymmetric [10π+2π] cycloaddition employs indene-2-carbaldehyde as an all-carbon 10π precursor to forge chiral spirooxindole-γ-butyrolactones (up to 93% ee). This method bypasses nitrogen-based higherene substrates, operates via NHC-bound isobenzofulvene intermediates, and scales to 4 mmol with retained efficiency, offering a versatile route to complex spirocycles. More details are discussed in the article by Deng et al. on pages 1983—1987.