Ultrathin porphyrin and tetra-indole covalent organic frameworks for organic electronics applications

Abstract

Paper published as part of the special topic on 2D Materials Note: This paper is part of the JCP Special Topic on 2D Materials.

Enormous Promotion of Photocatalytic Activity through the Use of Near-Single Layer Covalent Organic Frameworks

“…Therefore, the single-layer COFs (SLCOFs) offering the minimum diffusion distance for charge carriers will be the perfect candidate for photocatalysis. Although the SLCOFs can be successfully prepared on single crystal surface and solid-vapor-liquid interface, [27][28][29][30] such materials are unsuitable for application in photocatalysis due to the difficulty in preventing the stacking of free stand SLCOFs and the scale-up synthesis.…”

Topological Insulating Phase in Single-Layer Pentagonal Covalent Organic Frameworks: A Reticular Design Using Metal Phthalocyanine

“…To construct penta-COFs with planar structures and an ideal space group P4/mbm of the mcm net, we apply two strategies of reticular chemistry, particularly, the isoreticular expansion and the chemical functionalization. 2 As for the V4 unit, one can use either phthalocyanine 27,60 or porphyrin; 15,24,61 here, we choose the former to aim for a fully delocalized character of the resultant π-conjugated system. 62−64 We note that similar 2D π-conjugated materials based on MPc and the square lattice have been studied extensively.…”

“…To construct penta-COFs with planar structures and an ideal space group P 4/ mbm of the mcm net, we apply two strategies of reticular chemistry, particularly, the isoreticular expansion and the chemical functionalization . As for the V4 unit, one can use either phthalocyanine , or porphyrin; ,, here, we choose the former to aim for a fully delocalized character of the resultant π-conjugated system. − We note that similar 2D π-conjugated materials based on MPc and the square lattice have been studied extensively. , Zinc phthalocyanine (ZnPc) is chosen here to aim for nonmagnetic electronic structures of resultant materials since the scope of the current study is to explore the quantum spin Hall effect within the time-reversal systems. A series of π-conjugated linkers expanding in size are utilized as the (V3) 2 building unit, resulting in three isoreticular structures: mcm-ZnPc-1, mcm-ZnPc-2, and mcm-ZnPc-3.…”

Multi-sulfonated functionalized hydrophilic covalent organic framework for highly efficient dye removal from real samples

“…Since covalent organic frameworks (COFs) were initially reported in 2005 by Yaghi, 1 COFs as a burgeoning class of nanoporous and crystalline materials were customarily constructed by linking building blocks through stable covalent bonds. [2][3][4][5] Their intriguing structural nature, such as the designability of the unit structure, highly ordered channels, tunable porous sizes, as well as excellent thermal and chemical stability, endows them with tremendous interest in gas sorption, 6 separation, 7,8 catalysis, 9,10 electronics, 11,12 sensors, 13,14 batteries, 15 photocatalytics 16,17 and so forth. Specifically, COFs as adsorbing materials have been extensively exploited for the selective removal of organic dyes from polluted water in view of their large surface areas and superb visible light absorbance based on the different interactions between dye molecules and COF surfaces: for example, electrostatic interaction, p-p stacking interaction and hydrogen bonding.…”