2022
DOI: 10.1021/jacs.1c11051
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Are Highly Stable Covalent Organic Frameworks the Key to Universal Chiral Stationary Phases for Liquid and Gas Chromatographic Separations?

Abstract: High-performance liquid chromatography (HPLC) and gas chromatography (GC) over chiral stationary phases (CSPs) represent the most popular and highly applicable technology in the field of chiral separation, but there are currently no CSPs that can be used for both liquid and gas chromatography simultaneously. We demonstrate here that two olefin-linked covalent organic frameworks (COFs) featuring chiral crown ether groups can be general CSPs for extensive separation not only in GC but also in normal-phase and re… Show more

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Cited by 101 publications
(82 citation statements)
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“…Covalent organic frameworks (COFs) are an emerging class of porous crystalline materials connected by dynamic covalent bonds with symmetric organic subunits based on reticular chemistry. The modular nature and reticular structure of COFs provide a unique platform to incorporate various molecular building blocks and are beneficial in developing next-generation porous materials with tailor-made properties. COFs have attracted tremendous attention in multiple applications, such as adsorption and separation, catalysis, and other fields because of their permanent porosity, designable skeletons, and tunable pore chemistry. Nevertheless, from the diversity viewpoint, the field of COFs is still in its infancy, especially compared with the impressive success of metal–organic frameworks (MOFs). The direct introduction of novel building blocks for the construction of COFs is the most straightforward approach to augment the diversity of COF structures. However, the building blocks for COFs derived from the current petrochemical approaches are still minimal and expensive due to the complex synthesis routes. Thus, the exploration of newfangled organic monomers with low cost is urgently needed to broaden the COF family.…”
mentioning
confidence: 99%
“…Covalent organic frameworks (COFs) are an emerging class of porous crystalline materials connected by dynamic covalent bonds with symmetric organic subunits based on reticular chemistry. The modular nature and reticular structure of COFs provide a unique platform to incorporate various molecular building blocks and are beneficial in developing next-generation porous materials with tailor-made properties. COFs have attracted tremendous attention in multiple applications, such as adsorption and separation, catalysis, and other fields because of their permanent porosity, designable skeletons, and tunable pore chemistry. Nevertheless, from the diversity viewpoint, the field of COFs is still in its infancy, especially compared with the impressive success of metal–organic frameworks (MOFs). The direct introduction of novel building blocks for the construction of COFs is the most straightforward approach to augment the diversity of COF structures. However, the building blocks for COFs derived from the current petrochemical approaches are still minimal and expensive due to the complex synthesis routes. Thus, the exploration of newfangled organic monomers with low cost is urgently needed to broaden the COF family.…”
mentioning
confidence: 99%
“…[19] The separation performance of MOF stationary phases is a highly sensitive tool to probe both the thermodynamic interactions and kinetic diffusions of analytes caused by the specific pore environments of MOFs with different shapes. [20] Then, PCN-NP-1, -2, -3,-5, PCN-NR-1, -2, -3, NU-NP-1, -2 and NU-NR-1, -2 were coated on the inner walls of capillary GC columns, resulting in eleven columns, respectively (Figure S22-S25). These capillary columns were aged at 250 °C for at least 240 min.…”
Section: Methodsmentioning
confidence: 99%
“…To synthesize an electroactive COF, the main building block, 2,6-diamino-N 3 ,N 3 ,N 7 ,N 7 -tetramethylbenzo[1,2-b:4,5-b′]difuran-3,7-dicarboxamide (BDF-dicarboxamide), was designed (Scheme 1). The conjugated benzodifuran core and dual carboxamide side chains form an acceptor−donor− acceptor system, which is endcapped with amine groups for imine-type dynamic covalent chemistry (Figures S1 and S2).…”
Section: Synthesis Of Bdf-dicarboxamide and Bdfamide-tpmentioning
confidence: 99%