Topic
Dimethylformamide
About: Dimethylformamide is a research topic. Over the lifetime, 6793 publications have been published within this topic receiving 87752 citations. The topic is also known as: Dimethyl formamide & N,N-Dimethylformamide.
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14 Oct 2022
TL;DR: Yan et al. as discussed by the authors fabricated high quality CuInS2 precursor films from N,N-dimethylformamide molecular precursor solution by doctor-blading in ambient air, achieving power conversion efficiency of 12.54% on a small area and 8.43% on 1 cm2 level.
Abstract: Thin Film Solar Cells In article number 2200150, Weibo Yan, Hao Xin, and co-workers fabricated high quality CuInS2 precursor films from N,N-dimethylformamide molecular precursor solution by doctor-blading in ambient air. CuIn(S,Se)2 solar cells with a power conversion efficiency of 12.54% on a small area and 8.43% on 1 cm2 level have been achieved from doctor-bladed absorbers, demonstrating great potential of the solution approach for the low-cost industrial production of CuIn(S,Se)2 thin film solar cells.
27 Apr 2022
TL;DR: In this article , fresh and aged silver-epoxy nanocomposites were dispersed in aprotic solvents having different dielectric constants ( ε ) like Acetone (Ace), N, N-dimethylformamide (DMF), and DMSO (DMSO).
Abstract: Abstract Fresh and aged silver-epoxy nanocomposites were dispersed in aprotic solvents having different dielectric constants ( ε ) like Acetone (Ace), N, N-dimethylformamide (DMF), and dimethylsulphoxide (DMSO). Different colors and hues of the dispersions depending on the dielectric constant of the solvents were observed, suggesting a solvatochromic behavior. Aggregated and isolated triangular silver nanoprisms with sharp corners were predominant for fresh and aged dispersions in Acetone ( ε = 21.0), respectively. Whereas, aggregated and isolated truncated triangular silver nanoprisms were observed for the ones in DMF ( ε = 36.7), respectively. Stacks of elongated silver nanoparticles (Nps) predominated for both fresh and aged dispersions prepared in DMSO ( ε = 47.2). It was found that as the dielectric constant of the solvents increases the average size of the Nps diminishes and the silver nanoprisms were transformed into elongated shapes, for both fresh and aged samples. These morphologies have an important impact on the position and shape of the plasmonic resonance. The dipolar optical extinction maximum of the silver Nps of aged samples was linearly red-shifted with an increase in the dielectric constant of the solvents. On the other hand, it was observed higher stability for silver Nps dispersed in DMSO and DMF compared with Ace in both fresh and aged samples. The results show the influence of the solvent dielectric constant on the optical properties, size distribution, morphology, and stability of the silver Nps. A solvatochromic mechanism of the silver Nps based on the coalescence of small silver seed Nps (< 40 nm) is proposed.
Patent•
09 Oct 1973
TL;DR: In this article, 1-(R1 R2 N-Y-NH)-9-oxothioxanthene-4-carboxaldehyde intermediates for the preparation of the corresponding 4-hydroxymethyl compounds, also have antibacterial activity.
Abstract: 1-(R1 R2 N-Y-NH)-9-oxothioxanthene-4-carboxaldehydes, intermediates for the preparation of the corresponding 4-hydroxymethyl compounds, are prepared by heating 1-chloro-thioxanthen-9-one with R1 R2 N-Y-NHCH3 to yield 1-[R1 R2 N-Y-NH(CH3)] thioxanthen-9-one, reacting the latter compound with phosphorus oxyhalide and dimethylformamide to yield 1-[R1 R2 N-Y-N(CH3)]-9-oxothioxanthene-4-carboxaldehyde and reacting said aldehyde with pyridine hydrochloride to produce 1-(R1 R2 N-Y-NH)-9-oxothioxanthene-4-carboxaldehyde, where R1 and R2 are each lower-alkyl and Y is lower-alkylene having from two to four carbon atoms and having its two connecting linkages on different carbon atoms. The novel intermediates, 1-[R1 R2 N-Y-N(CH3)]thioxanthen-9-ones, also have antibacterial activity.