Back Cover: Rapid, Ordered Polymerization of Crystalline Semiconducting Covalent Triazine Frameworks (Angew. Chem. Int. Ed. 4/2022)

Abstract

The rapid synthesis of crystalline semiconducting covalent triazine frameworks (CTFs) through a two‐dimensional (2D) ordered polymerization mechanism is described by Yuxi Xu and co‐workers in their Communication (e202113926). Increasing the crystallinity of CTFs can significantly facilitate the photogenerated carrier transport and improve the photocatalytic activity. Single‐layer/few‐layer 2D triazine polymer nanosheets can be further obtained by ball‐milling exfoliation of the bulk CTFs and exhibit superior photocatalytic performance.

The order–disorder conundrum: a trade-off between crystalline and amorphous porous organic polymers for task-specific applications

“…24,25,34,35 There are very few reports on crystalline CTFs. [36][37][38][39] In the present article, we have aimed to resolve the orderdisorder conundrum from the application perspective, specically focussing on the all-organic covalently linked crystalline and amorphous porous polymers fabricated through templatefree routes. Interested readers are referred to some of the interesting review articles for a detailed deliberation on porous network polymers obtained through either hard or so templating techniques, 6,40 which are beyond the scope of this article.…”

A General Strategy for Kilogram‐Scale Preparation of Highly Crystal‐line Covalent Triazine Frameworks

“…Particularly, crystalline CTFs with well‐defined molecular structures and regular pore channels can maximize the utilization of the features of CTFs and promote fundamental understanding of the structure–property relationship. However, most of the reported CTFs are amorphous or weakly crystalline due to the low reversibility of trimerization reaction of nitrile groups, and there are very limited methods for synthesis of crystalline CTFs [14–16] …”

A General Strategy for Kilogram‐Scale Preparation of Highly Crystalline Covalent Triazine Frameworks

“…Up to now, crystalline CTFs can only be synthesized by 1) high‐temperature ionothermal strategy, [17] 2) superacid‐catalyzed strategy, [7, 15, 16, 18, 19] 3) amidine‐based polycondensation methods, [9, 20] and 4) phosphorus pentoxide (P 2 O 5 )‐catalyzed method [21] . The first crystalline CTF was synthesized by high‐temperature ionothermal method using molten zinc chloride (ZnCl 2 ) as catalysts and aromatic nitriles as monomer in 2008 [17] .…”

“…However, most of the reported CTFs are amorphous or weakly crystalline due to the low reversibility of trimerization reaction of nitrile groups, and there are very limited methods for synthesis of crystalline CTFs. [14][15][16] Up to now, crystalline CTFs can only be synthesized by 1) high-temperature ionothermal strategy, [17] 2) superacidcatalyzed strategy, [7,15,16,18,19] 3) amidine-based polycondensation methods, [9,20] and 4) phosphorus pentoxide (P 2 O 5 )-catalyzed method. [21] The first crystalline CTF was synthesized by high-temperature ionothermal method using molten zinc chloride (ZnCl 2 ) as catalysts and aromatic nitriles as monomer in 2008.…”