Donor–Acceptor Covalent Organic Frameworks as a Heterogeneous Photoredox Catalyst for Scissoring Alkenes to Carbonyl Constituents

Das, Anupam; Mohit,; Thomas, K. R. Justin

doi:10.1021/acs.joc.3c01594

Cited by 5 publications

(1 citation statement)

References 72 publications

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“…Apart from that to solve the problem of hydrogen storage and CO 2 capture, adsorption technology utilizing porous materials is considered an effective, low-cost, and reliable alternative due to its simplicity, ease of operation, and high efficiency. − Therefore, porous materials can play a crucial role in storing energy and hydrogen as well as capturing CO 2 . Among various porous materials, covalent organic frameworks (COFs) are unique and have attracted significant attention due to their exceptional ability to precisely assemble organic building blocks at the molecular level, opening up vast possibilities for design. − COFs are a perfect candidate for energy storage − and CO 2 capture, , owing to their remarkable porosity, tunable pore topologies, and unique pore shapes, making them a promising next-generation solid adsorbent with immense applications in various fields. − To make COFs effective in energy and gas storage applications, a combination of a large surface area, an active redox site, and extended electronic conjugation is necessary. Both theoretical and experimental studies have indicated that the presence of heteroatoms, such as N, O, B, S, and P in polymeric or carbonaceous materials, has shown promising performance for charge storage processes.…”

Section: Introductionmentioning

confidence: 99%

Flexible Linker-Based Triazine-Functionalized 2D Covalent Organic Frameworks for Supercapacitor and Gas Sorption Applications

Kumar,

Ahmad,

Rawat

et al. 2024

ACS Appl. Mater. Interfaces

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Covalent organic frameworks (COFs) having a large surface area, porosity, and substantial amounts of heteroatom content are recognized as the ideal class of materials for energy storage and gas sorption applications. In this work, we have synthesized four different porous COF materials by the polycondensation of a heteroatom-rich flexible triazine-based trialdehyde linker, namely 2,4,6-tris(4-formylphenoxy)-1,3,5-triazine (TPT-CHO), with four different triamine linkers. Triamine linkers were chosen based on differences in size, symmetry, planarity, and heteroatom content, leading to the synthesis of four different COF materials named IITR-COF-1, IITR-COF-2, IITR-COF-3, and IITR-COF-4. IITR-COF-1, synthesized within 24 h from the most planar and largest amine monomer, exhibited the largest Brunauer−Emmett−Teller (BET) surface area of 2830 m 2 g −1 , superior crystallinity, and remarkable reproducibility compared to the other COFs. All of the synthesized COFs were explored for energy and gas storage applications. It is shown that the surface area and redox-active triazene rings in the materials have a profound effect on energy and gas storage enhancement. In a three-electrode setup, IITR-COF-1 achieved an electrochemical stability potential window (ESPW) of 2.0 V, demonstrating a high specific capacitance of 182.6 F g −1 with energy and power densities of 101.5 Wh kg −1 and 298.3 W kg −1 , respectively, at a current density of 0.3 A g −1 in 0.5 M K 2 SO 4 (aq) with long-term durability. The symmetric supercapacitor of IITR-COF-1//IITR-COF-1 exhibited a notable specific capacitance of 30.5 F g −1 and an energy density of 17.0 Wh kg −1 at a current density of 0.12 A g −1 . At the same time, it demonstrated 111.3% retention of its initial specific capacitance after 10k charge−discharge cycles. Moreover, it exhibited exceptional CO 2 capture capacity of 25.90 and 10.10 wt % at 273 and 298 K, respectively, with 2.1 wt % of H 2 storage capacity at 77 K and 1 bar.

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