title: Multifunctional Porous Organic Polymers: Tuning of Porosity, CO2, and H2Storage and Visible-Light-Driven Photocatalysis.
abstract: A series of porous organic polymers (POPs) were fabricated based on a boron dipyrromethene (BODIPY) core. The variation of the substituents in the BODIPY core and the fine-tuning of the Sonogashira polycondenzation reaction with 1,3,5-triethynylbenzene led to the formation of POPs with a wide range of surface area and porosity. A 10-fold increase in surface area from 73 m2g-1in BDT1a polymer to 1010 m2g-1in BDT3 was obtained. Simultaneously, the porosity was changed from mesoporous to ultramicroporous. The surface area of BDT3 turned out to be the highest reported so far for BODIPY-based POPs. Molecular dynamics simulation coupled with Grand Canonical Monte Carlo simulations revealed the effect of substituents alkyl groups and rigidity of the core structures on the surface properties of the POPs. Detailed gas adsorption studies of the polymers revealed a high uptake of CO2and H2. The highest uptake capacity of 16.5 wt % for CO2at 273 K and 2.2 wt % for H2at 77 K was observed for BDT3 at 1 bar pressure. The isosteric heat of adsorption (Qst) of BDT3 for CO2was found to be as high as 30.6 kJ mol-1. Electron paramagnetic resonance studies revealed the generation of singlet oxygen upon photoexcitation of these polymers. The BODIPY-based POPs turned out to be excellent catalysts for visible-light-driven photo-oxidation of thioanisole. The present study establishes BODIPY-based POPs as a new class of multifunctional materials.
authors.affiliation: Indian Institute of Science Education and Research Bhopal , Indore Bypass Road, Bhauri, Bhopal 462066, Madhya Pradesh India.
authors.forename: Sujoy
authors.initials: S
authors.lastname: Bandyopadhyay
authors.affiliation: Indian Institute of Science Education and Research Bhopal , Indore Bypass Road, Bhauri, Bhopal 462066, Madhya Pradesh India.
authors.forename: Amith G
authors.initials: AG
authors.lastname: Anil
authors.affiliation: Indian Institute of Science Education and Research Bhopal , Indore Bypass Road, Bhauri, Bhopal 462066, Madhya Pradesh India.
authors.forename: Anto
authors.initials: A
authors.lastname: James
authors.affiliation: Indian Institute of Science Education and Research Bhopal , Indore Bypass Road, Bhauri, Bhopal 462066, Madhya Pradesh India.
authors.forename: Abhijit
authors.initials: A
authors.lastname: Patra
keywords: BODIPY; CO2 uptake; H2 storage; multifunctional; photocatalyst; porous organic polymer; singlet oxygen