02314nas a2200205   4500008004100000245014500041210006900186260000800255490000700263520153500270100002101805700002601826700001701852700001801869700002801887700002501915700001601940700003001956856012201986       2018                        eng d00aHighly stable COF-supported Co/Co(OH)(2) nanoparticles heterogeneous catalyst for reduction of nitrile/nitro compounds under mild conditions0 aHighly stable COFsupported CoCoOH2 nanoparticles heterogeneous c  cSEP0 v143 aOrdered nanoporosity in covalent organic framework (COF) offers excellent opportunity for property development. Loading nanoparticles (nPs) onto them is one approach to introducing tailor-made properties into a COF. Here, a COF-Co/Co(OH)(2) composite containing about 16 wt% of <6 nm sized Co/Co(OH)(2) nPs is prepared on a N-rich COF support that catalyzes the release of theoretical equivalence of H-2 from readily available, safe, and cheap NaBH4. Furthermore, the released H-2 is utilized for the hydrogenation of nitrile and nitro compounds to amines under ambient conditions in a facile one-pot reaction. The COF "by choice" is built from "methoxy" functionalized dialdehydes which is crucial in enabling the complete retention of the COF structure under the conditions of the catalysis, where the regular Schiff bonds would have hydrolyzed. The N-rich binding pockets in the COF ensure strong nP-COF interactions, which provides stability and enables catalyst recycling. Modeling studies reveal the crucial role played by the COF in exposing the active facets and thereby in controlling the activation of the reducing agent. Additionally, via density functional theory, we provide a rational explanation for how these COFs can stabilize nanoparticles which grow beyond the limiting pore size of the COF and yet result in a truly stable heterogeneous catalyst - a ubiquitous observation. The study underscores the versatility of COF as a heterogeneous support for developing cheap and highly active nonnoble metal catalysts.1 aMullangi, Dinesh1 aChakraborty, Debanjan1 aPradeep, Anu1 aKoshti, Vijay1 aVinod, Chathakudath, P.1 aPanja, Soumendranath1 aNair, Sunil1 aVaidhyanathan, Ramanathan  uhttps://library.ncl.res.in/content/highly-stable-cof-supported-cocooh2-nanoparticles-heterogeneous-catalyst-reduction