Crystalline porous organic salts

Abstract

CPOSs, formed through self-assembly of organic acids and organic bases, are gradually evolving into a field full of opportunities and challenges.

A highly stable hydrogen-bonded organic framework for hydrogen storage

“…Notably, the crystallinity of 1 was maintained even under humid conditions, which typically pose a challenge to hydrogen-bonded framework systems, as demonstrated in organic salt foam. 15,16 We hypothesize that the abundant hydrogen bonds contribute to the robust structure of 1 , creating a narrow pore environment that hinders the penetration of other solvent molecules, resulting in high structural stability.…”

Facile synthesis of naphthalene-based porous organic salts for photocatalytic oxidative coupling of amines in air

“…In particular, NA-POS-1 possesses a moderate Brunauer–Emmett–Teller (BET) surface area of 61 m 2 g −1 and a total pore volume of 0.41 cm 3 g −1 , and is one of the several POSs that can obtain considerable BET surface areas by N 2 sorption (Table S2†). 1,2 Compared with crystalline monomers, NDA and NDSA (Fig. 1C), the X-ray diffraction (XRD) pattern of NA-POS-1 still displays a set of strong Bragg diffraction peaks at 2 θ = 11.7°, 14.1°, 16.3°, 18.0°, 22.9°, 25.6° and 26.9°, indicating its highly crystalline structure with well-ordered arrangements.…”

“…Porous organic salts (POSs), as a new class of rapidly emerging crystalline porous organic materials, can be often facilely self-assembled by multi-point organic acids and bases through the combination of directional hydrogen bonding and strong ionic interactions. 1,2 Such unique charge-assisted hydrogen bonding and electrostatic interactions in POSs endow them with highly polarized channels and the ability to transfer electrons and protons, 1 which make POSs distinct from covalent organic frameworks (COFs) and metal organic frameworks (MOFs) that were constructed by covalent and coordinate bonds via relatively complicated synthetic routes. 3 Recently, various POSs that are composed of various synthons related to aromatic organic acids and amines have been reported, 2,4–8 which have found their applications in various fields including gas adsorption, molecular rotors, proton conductivity, electron transfer, and catalysis.…”

“…3 Recently, various POSs that are composed of various synthons related to aromatic organic acids and amines have been reported, 2,4–8 which have found their applications in various fields including gas adsorption, molecular rotors, proton conductivity, electron transfer, and catalysis. 1,9–11 However, compared with COFs and MOFs, 3 the application of POSs in photocatalysis is still underway. Therefore, there is an urgent demand for the rational design of POS-based photocatalysts for boosting photocatalytic reactions.…”