Side-chain-tuned π-extended porous polymers for visible light-activated hydrogen evolution

Abstract

Side-chain-tuned conjugated porous polymers with sp2-carbon-linked skeleton feature excellent π-delocalization, narrow band gaps, hydrophilicity and chemical stability, allowing for efficient photocatalytic hydrogen evolution from water splitting.

Vinylene‐Linked Covalent Organic Frameworks (COFs) with Symmetry‐Tuned Polarity and Photocatalytic Activity

“…High crystallinity of the two COFs enabled an insight into the influence of structural characters on the photophysical properties.T ypically,d ue to the meta-position effect of ab enzene ring, acceptors and donors alternating around it represents at ype of octupolar structure. [8] Meanwhile,t he electron-deficient 1,3,5-triazine ring, which is capable of welldelocalizing p-electron over the three aromatic carbon atoms, can serve as an acceptor center [21] by alternatively attaching three electron-donating group to its 2,4,6-positions to form another type of octupolar structure. [22] Considering the electron affinity and ionization potential of the different aromatic units,t he molecular structure of g-C 54 N 6 -COF is reasonably consisted of two kinds of elemental octupolar pconjugated substructures around 1,3,5-tricyanobenzene and 1,3,5-triazine moieties,r espectively (Figure 4a).…”

Recent Advances in Visible‐Light‐Driven Hydrogen Evolution from Water using Polymer Photocatalysts

“…As‐prepared OB−POP‐3 showed excellent photocatalytic activity with a good AQY of 2.0 % at 420 nm and 1.9 % at 470 nm under visible‐light irradiation, even higher than those of reported CMP‐based photocatalysts. Similarly, very recently, Zhang and coworkers also reported several fully sp 2 −carbon‐linked CMPs that were synthesized through the condensation of 1,3,5‐tris‐(4‐formylphenyl)triazine (TFPT) with 1,4‐phenylenediacetonitrile derivatives (Figure ) . Among them, TFPT−OCH 3 showed lower H 2 evolution than OB−POP‐3 polymers, but excellent stability with an AQY of 1.03 % at 405 nm under visible light.…”

“…Similarly, very recently, Zhang and coworkers also reported several fully sp 2 À carbonlinked CMPs that were synthesized through the condensation of 1,3,5-tris-(4-formylphenyl)triazine (TFPT) with 1,4-phenylenediacetonitrile derivatives ( Figure 6). [56] Among them, TFPTÀ OCH 3 showed lower H 2 evolution than OBÀ POP-3 polymers, but excellent stability with an AQY of 1.03 % at 405 nm under visible light. Furthermore, this design principle has led to good photophysical properties and the hydrophilicity of the polymers could be fine-tuned by altering the side chains towards enhancing photocatalytic water splitting.…”

Interfacial Synthesis of a Monolayered Fluorescent Two‐Dimensional Polymer through Dynamic Imine Chemistry

“…Two-dimensional polymers (2DPs) have been generally accepted as materials with atomic-thick or monolayer, covalently linked, highly ordered 2D topological network. [1][2][3][4][5][6][7][8] The recent high interest and the fast development of 2DPs materials are driven by their unique structures, [9][10][11] potential applications [12][13][14][15][16] and infinite structure possibilities through monomer design. [17] The properties of the 2DPs are completely different from those of traditional linear or branched polymers due to the total different 2D structure.…”