Natural Sunlight Driven Oxidative Homocoupling of Amines by a Truxene-Based Conjugated Microporous Polymer

Abstract

In this study, we report the synthesis of a metalfree truxene-based conjugated microporous polymer (Tx-CMP) and demonstrate its heterogeneous photocatalytic applications under direct sunlight. We employed Tx-CMP for the oxidative homocoupling of amines. This model reaction describes an effective way to harvest natural sunlight effectively for organic transformations. High conversion and selectivity of Tx-CMP have been demonstrated with recyclability of at least five times without any decrease in its catalytic activity under direct sunlight.

In silico design of 2D polymers containing truxene-based platforms: insights into their structural and electronic properties

“…Because of their flat trigonal topology, these molecules have recently aroused interest as building units in the construction of functional COFs and CMPs. In fact, recently, microporous polymers based on these semiconducting monomers have been reported, with photocatalytic properties, [22][23][24] sensing ability, 25,26 thermoelectric, 27 supercapacitor behavior 28 or field effect behavior. 16 Optimizing materials for these applications requires the fine-tuning of different parameters, such as energy levels, p-conjugation or exciton/charge transport.…”

Recent Advances of Conjugated Microporous Polymers in Visible Light–Promoted Chemical Transformations

“…Recently, Kailasam and coworkers reported a novel truxene‐based CMP (Tx‐CMP) with a high surface of about 1022 m 2 g −1 and narrow bandgap of 2.6 eV ( Figure ). [ 99 ] Tx‐CMP was able to catalyze the oxidative homocoupling of amines under natural sunlight based on a similar reaction mechanism as mentioned above, and the CMP could be reused for five repeating recycles by maintaining its activity.…”

Functionalized Truxene Scaffold: A Promising Advanced Organic Material for Digital Era

“…Quite recently, Battula et al. has reported the synthesis of conjugated porous type polymer containing truxene units in their structures via palladium‐catalyzed Suzuki cross‐coupling reaction (scheme ) …”

“…Here, the oxidative homocoupling of benzylamine was carried out by 46 as a metal‐free photocatalyst with optimal conversion, revealing the formation of 99% yield within short period of time. The comparative catalytic study of 46 , TiO 2, and mesoporous graphitic carbon nitride (SG‐CN) for the photo‐oxidation of benzylamine in the presence natural sunlight reveals the order 46 > TiO 2 > SG‐CN (Figure ) …”