Diformylphloroglucinol derived imine based covalent organic frameworks (PHTA) as efficient organocatalyst for conversion of isocyanates to urea derivatives

Chakrabortty, Pekham; Biswas, Surajit; Das, Anjan Kumar; Dolai, Malay

doi:10.1016/j.mcat.2022.112213

Cited by 3 publications

(3 citation statements)

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“…In the C1s spectrum of COFs-COOH, three components corresponding to C─C/C─H, C─O, and C═O (COOH) bonds at binding energies of 284.5, 285.4, and 288.9 eV were identified, respectively [25,26]. The increase of the components at 288.9 eV in COFs-COOH, compared with that in the unmodified COFs [27], confirmed the successful introduction of ─COOH groups through post-modification.…”

Section: Characterization Of Cofs and Post-modified Cofs-coohmentioning

confidence: 99%

Carboxyl‐functionalized covalent organic frameworks for the extraction of malachite green and crystal violet in environmental water samples prior to quantification by high‐performance liquid chromatography

Lai,

Hu,

Tang

et al. 2024

J of Separation Science

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In this study, monodisperse, uniform, and spherical covalent organic frameworks (COFs) were synthesized using 1,3,5‐tris (4‐aminophenyl) benzene and 1,3,5‐tricarboxaldehyde benzene at room temperature. Post‐modification of 6‐aminocaproic acid on the COFs yielded carboxyl‐modified COFs (COFs‐COOH). The modification enhanced the hydrophilicity and adsorption efficiencies of COFs‐COOH for malachite green (MG) and crystal violet (CV). A COFs‐COOH‐based dispersive solid‐phase extraction coupled with high‐performance liquid chromatography was developed for the analysis of MG and CV. The method showed a linear range from 10 to 1000 ng/mL with detection limits of 1.82 and 0.70 ng/mL for MG and CV detection, respectively. The recoveries of MG and CV from water samples collected from fish farms and markets ranged from 91.63% to 107.10% with relative standard deviations below 5%. Reproducibility tests demonstrated that the adsorption efficiencies of COFs‐COOH were maintained at above 85.86% over 15 cycles. The study verified the potential of COFs‐COOH as sorbents for the enrichment and separation of triphenylmethane dyes from complex samples.

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Section: Characterization Of Cofs and Post-modified Cofs-coohmentioning

confidence: 99%

Carboxyl‐functionalized covalent organic frameworks for the extraction of malachite green and crystal violet in environmental water samples prior to quantification by high‐performance liquid chromatography

Lai,

Hu,

Tang

et al. 2024

J of Separation Science

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“…The reusability diagram proves that the utilized catalyst is reusable and exhibits appropriately heterogeneous features in the reaction up to 5 cycles. 137 Prepared cobalt-doped nitrogenous porous carbon (Co/NPC) reveals greater catalytic efficiency than n-hexane. Besides, a prepared compound-based cataluminescence (CTL) sensor can determine n-hexane rapidly and sensitively.…”

Section: Njc Papermentioning

confidence: 99%

“…The reusability diagram proves that the utilized catalyst is reusable and exhibits appropriately heterogeneous features in the reaction up to 5 cycles. 137…”

Section: Cofs For Catalytic Applicationsmentioning

confidence: 99%