A visible-light-induced C-5 selective C-H borylation of imidazo[1,2-a]pyridines with NHC-BH 3 via Minisci-type radical borylation reaction has been developed for the first time. The present sustainable protocol provides a new family of regioselectively C5-borylated imidazopyridines that would otherwise be difficult to prepare. It is a supplement to site-selective borylation of azines (nitrogen-containing aromatic heterocycles) and the assembly of sp 2 carbon-boron bond.
Highly efficient
and selective removal of pharmaceuticals and personal care products
(PPCPs) from wastewater is a great challenge and is significant. In
this study, we chose UiO-66-R, which contains eight isostructural
metal–organic frameworks (MOFs) with variable functional groups
(−R), as a platform for systemically investigating the influence
of functionalization on its adsorption behavior with respect to three
classic PPCPs. We conducted kinetic, modeling, and structure–function
relationship studies on PPCP removal using MOFs. The adsorption kinetics,
including the adsorption rate, affinity, and separation factor (R
L), were comprehensively analyzed and simulated.
The design and function of MOFs can greatly promote their adsorption
capacity and the efficiency of PPCPs. The structure–function
relationship study revealed that hydrogen bonding, electrostatic,
and π–π interactions between MOFs and PPCP molecules
played important roles in the adsorption process and significantly
influenced the adsorption efficiency. This study paves a new way for
the application of MOFs with respect to the removal of PPCP pollution
and provides guidance for the design of new porous materials for environmental
treatment and separation applications.
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