UV light promoted 'Metal'/'Additive'-free oxidation of alcohols: investigating the role of alcohols as electron donors.

UV light promoted selective oxidation of primary and secondary alcohols has been demonstrated under 'metal-free' and 'additive-free' conditions. Under the optimized conditions, a variety of aromatic, heteroaromatic, and alicyclic alcohols have been examined for their transformations to the corresponding carbonyl compounds. The mechanistic studies emphasize the important role of substrate (alcohol) and solvent (DMSO) in the generation of superoxide radical which is a vital intermediate for the transformation. This study also highlights the role of air as the oxidant in the oxidation process. Further, the practical application of the strategy has also been demonstrated for the oxidation of the alcoholic moiety in cholesterol.

Encapsulating Au-Fe3 O4 Nanodots into AIE-active Supramolecular Assemblies: Ambient Visible-light Harvesting "Dip-Strip" Photocatalyst for C-C/C-N Bond Formation Reactions.

The present study demonstrates the development of a supramolecular porous ensemble consisting of hetero-oligophenylene derivative 6 and Au-Fe3 O4 nanodots. Supramolecular assemblies of AIE-active hetero-oligophenylene derivative 6 served as reactors for the generation of Au-Fe3 O4 nanodots. The as prepared supramolecular ensemble functioned as an efficient recyclable photocatalytic system for C(sp2 )-H bond activation of anilines for the construction of quinoline carboxylates. Interestingly, the "dip catalyst" prepared by depositing PTh-co-PANI-6: Au-Fe3 O4 nanodots on a filter paper served as a recyclable strip (up to 10 cycles) for C-C/C-N bond formation reaction.

Empowering Transition-Metal-Free Cascade Protocol for the Green Synthesis of Biaryls and Alkynes.

The work being presented in this paper demonstrates the simple and efficient "transition-metal-free" and "light-mediated" synthetic protocol for the synthesis of aryl iodides/biaryls/alkynes from aryl bromides. Under ultraviolet irradiation and in basic aqueous media, aryl bromides undergo transformation into aryl iodides which efficiently couple via a cascade reaction with a wide range of terminal alkynes/unactivated arenes to generate target molecules under green conditions.

Aggregates of a hetero-oligophenylene derivative as reactors for the generation of palladium nanoparticles: a potential catalyst in the Sonogashira coupling reaction under aerial conditions.

The utilization of Pd nanoparticles stabilized by aggregates of hetero-oligophenylene derivative 3 as an excellent catalyst in a copper/amine free Sonogashira coupling reaction under aerial conditions at room temperature has been demonstrated.