A simple and efficient method for the synthesis of dialdehyde aniline in good yields (up to 83%) is explored using Cu(OTf) as the catalyst, Selectfluor as the radical initiator, and DMSO as both the carbon and oxygen sources. Experimental studies indicate that the reaction is achieved by the formylation of two C-H bonds, first at the para-position and then at the ortho-position. A possible mechanism is proposed, including the thermal homolysis of Selectfluor, the Cu(II)-facilitated formylation of the C-H bonds, and the hydrolysis of the amide under alkaline conditions in air atmosphere.
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http://dx.doi.org/10.3389/fchem.2022.891858 | DOI Listing |
Macromol Rapid Commun
January 2025
State Key Laboratory of Applied Organic Chemistry (SKLAOC), Key Laboratory of Special Function Materials and Structure Design, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, China.
Conjugated polymers have attracted extensive attention as semiconducting materials in wearable and flexible electronics. In this study, we utilize atom-economical Knoevenagel reaction to construct two conjugated polymers, PTDPP-CNTT and PFDPP-CNTT, based on dialdehyde-thiophene/furan-flanked diketopyrrolopyrrole (DPP) and 2,2'-(thieno[3,2-b]thiophene-2,5-diyl)diacetonitrile (CNTT). The resulting polymers exhibited suitable highest occupied molecular orbital/lowest unoccupied molecular orbital (HOMO/LUMO) energy levels, small bandgaps, and broad UV-vis-NIR absorptions (≈400-1000 nm), endowing them with photothermal and balanced ambipolar semiconducting properties with hole and electron mobilities over 10 cmVs.
View Article and Find Full Text PDFPlants (Basel)
December 2024
Ufa Institute of Chemistry, Ufa Federal Research Centre, Russian Academy of Sciences, Ufa 450054, Russia.
Biological remediation of agricultural soils contaminated with oil is complicated by the presence of residual amounts of chemical plant protection products, in particular, herbicides, which, like oil, negatively affect the soil microbiome and plants. In this work, we studied five strains of bacteria of the genera and , which exhibited a high degree of oil biodegradation (72-96%). All strains showed resistance to herbicides based on 2,4-D, imazethapyr and tribenuron-methyl, the ability to fix nitrogen, phosphate mobilization, and production of indole-3-acetic acid.
View Article and Find Full Text PDFFront Fungal Biol
November 2024
Instititue of Food Chemistry, University of Münster, Münster, Germany.
Int J Biol Macromol
January 2025
School of Chemistry Materials Engineering, Zhejiang A&F University, Zhejiang Province, Hangzhou 10341, PR China.
Using deep eutectic solvents (DES) to pretreat wheat straw (WS) and extract lignin-containing nanocellulose (LCNC). Acrylic acid/choline chloride (AA/ChCl) polymerizable deep eutectic solvents (PDES) were used as the primary polymerization network, combined with polyvinyl alcohol (PVA). Lignocellulose nanocrystals (LCNC) oxidized by sodium periodate were prepared as dialdehyde-based nanocellulose (DCNC) to serve as the crosslinking agent.
View Article and Find Full Text PDFSmall
November 2024
Environmental Science and Engineering Program, Biological and Environmental Science and Engineering Division, King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia.
A well-defined α,ω-dialdehyde polyisoprene-b-polystyrene block copolymer, synthesized using anionic polymerization high-vacuum techniques, is employed to prepare vitrimers with tris(2-aminoethyl)amine as the cross-linking agent. The vitrimer network, featuring dynamic imine cross-links, results in robust, flexible, and solvent-resistant films, which are applicable in thin film composite membranes. These vitrimer membranes, with molecular weight cut-offs in the nanofiltration range, are successfully used for organic solvent separation and evaluated for gas separation.
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