Multi-spectroscopic (FT-IR, FT-Raman, 1H NMR and 13C NMR) investigations on syringaldehyde

Kumar, A. Ram; Selvaraj, S.; Jayaprakash, Karamil; Gunasekaran, S.; Kumaresan, S.; Devanathan, J.; Selvam, K.A.; L, Ramadass; Mani, M.; Rajkumar, P.

doi:10.1016/j.molstruc.2020.129490

Cited by 30 publications

(14 citation statements)

References 37 publications

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“…The peaks at 3451, 1639 and 1461 cm −1 ascribe to the N–H bending and stretching of the amine group, while the broad brands at 1226–1025 cm −1 are the uptake for C–N. From the results of the FTIR spectra, we conclude that the modification of GnPs by ADA was successful ( Figure 2 b) [ 33 , 34 , 35 , 36 , 37 , 38 , 39 ]. The organophilic absorption between the aliphatic chain of ADD and the TPU matrix leads to uniform dispersion of particles in the TPU matrix.…”

Section: Resultsmentioning

confidence: 97%

A Comparative Analysis of Chemical, Plasma and In Situ Modification of Graphene Nanoplateletes for Improved Performance of Fused Filament Fabricated Thermoplastic Polyurethane Composites Parts

et al. 2022

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The limited number of materials and mechanical weakness of fused deposition modeling (FDM) parts are deficiencies of FDM technology. The preparation of polymer composites parts with suitable filler is a promising method to improve the properties of the 3D printed parts. However, the agglomerate of filler makes its difficult disperse in the matrix. In this work, graphene nanoplatelets (GnPs) were surface modified with chemical, low-temperature plasma and in situ methods, in order to apply them as fillers for thermoplastic polyurethane (TPU). Following its modification, the surface chemical composition of GnPs was analyzed. Three w% of surface-modified GnPs were incorporated into TPU to produce FDM filaments using a melting compounding process. Their effects on rheology properties and electrical conductivity on TPU/GnPs composites, as well as the dimensional accuracy and mechanical properties of FDM parts, are compared. The images of sample facture surfaces were examined by scanning electron microscope (SEM) to determine the dispersion of GnPs. Results indicate that chemical treatment of GnPs with zwitterionic surfactant is a good candidate to significantly enhance TPU filaments, when considering the FDM parts demonstrated the highest mechanical properties and lowest dimensional accuracy.

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Section: Resultsmentioning

confidence: 97%

A Comparative Analysis of Chemical, Plasma and In Situ Modification of Graphene Nanoplateletes for Improved Performance of Fused Filament Fabricated Thermoplastic Polyurethane Composites Parts

et al. 2022

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“…33 The δ = 3.47 (b, c) signal is associated with the chemical shift of hydrogen at the −CH 2 − group connected with the carbamido group, and the δ = 4.2 (d) signal is relating to the chemical shift of −CH 2 − between the carbamido group and the −COO− group. 36 Moreover, the signal at δ = 1.93 (e) corresponds to the chemical shift of hydrogen at the −CH 3 group in the SSH terminal. 33 The δ = 6.11, 5.57 (g, g′) signals correlate with the chemical shift of hydrogen at the −CH 2 group of the double bond.…”

Section: Resultsmentioning

confidence: 99%

“…The signal at δ = 2.76 (a) is related to the chemical shift of hydrogen at the −CH 2 – group connected by the disulfide bond . The δ = 3.47 (b, c) signal is associated with the chemical shift of hydrogen at the −CH 2 – group connected with the carbamido group, and the δ = 4.2 (d) signal is relating to the chemical shift of −CH 2 – between the carbamido group and the −COO– group . Moreover, the signal at δ = 1.93 (e) corresponds to the chemical shift of hydrogen at the −CH 3 group in the SSH terminal .…”

Section: Resultsmentioning

confidence: 99%

Rapid Self-Healing Gel Electrolyte Based on Deep Eutectic Solvents for Solid-State Lithium Batteries

Zhang

et al. 2022

ACS Appl. Mater. Interfaces

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A deep eutectic solvent (DES) is a promising electrolyte choice for lithium metal batteries. However, the DES liquid electrolyte causes safety concerns and side reactions with the lithium anode. Therefore, it is necessary to solidify the DES-based electrolyte and enhance its electrochemical stability. Herein, we present a novel DES-based rapid self-healing gel electrolyte, which is able to self-smooth its surface cracks in only 30 min. The electrolyte exhibits noncombustibility (SET = 4 s g–1), high ionic conductivity (1.1 × 10–3 S cm–1 at 25 °C), and a wide electrochemical voltage window (4.5 V vs Li/Li+). As a result, the solid-state lithium batteries coupling the gel electrolyte with the Li anode and LiFePO4 cathode deliver a high specific capacity of 135.4 mA h g–1 with durable cyclic stability (>1200 h). This work provides valuable insights for design of fire-resistant and high-energy solid-state lithium batteries.

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“…13 C-NMR (400 MHz, CDCl 3 ), δ: 190.92 (CHO), 147.46 (C-3, 5), 140.88 (C-4), 128.54 (C-1), 107.57 (C-2, 6), 56.65 (OCH 3 ). Compound 14 was identified as Syringaldehyde by comparison with the literature [ 29 ].…”

Section: Resultsmentioning

confidence: 99%

Studies on Chemical Composition of Pueraria lobata and Its Anti-Tumor Mechanism

et al. 2022

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Fourteen compounds were isolated from Pueraria lobata (Willd.) Ohwi by column chromatography and preparative thin-layer chromatography; the structures were identified by spectroscopic analysis and compared with data reported in the literature. Seven compounds were isolated and identified from Pueraria lobata for the first time: Linoleic acid, Sandwicensin, Isovanillin, Ethyl ferulate, Haginin A, Isopterofuran, 3′.7-Dihydroxyisoflavan. The other 10 compounds were structurally identified as follows: Lupenone, Lupeol, β-sitosterol, Genistein, Medicarpin, Coniferyl Aldehyde, Syringaldehyde. All compounds were evaluated for their ability to inhibit SW480 and SW620 cells using the CCK-8 method; compound 5 (Sandwicensin) had the best activity, and compounds 6, 9, 11 and 12 exhibited moderate inhibitory activity. In addition, the targets and signaling pathways of Sandwicensin treatment for CRC were mined using network pharmacology, and MAPK3, MTOR, CCND1 and CDK4 were found to be closely associated with Sandwicensin treatment for CRC; the GO and KEGG analysis showed that Sandwicensin may directly regulate the cycle, proliferation and apoptosis of CRC cells through cancer-related pathways.

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Multi-spectroscopic (FT-IR, FT-Raman, 1H NMR and 13C NMR) investigations on syringaldehyde

Cited by 30 publications

References 37 publications

A Comparative Analysis of Chemical, Plasma and In Situ Modification of Graphene Nanoplateletes for Improved Performance of Fused Filament Fabricated Thermoplastic Polyurethane Composites Parts

A Comparative Analysis of Chemical, Plasma and In Situ Modification of Graphene Nanoplateletes for Improved Performance of Fused Filament Fabricated Thermoplastic Polyurethane Composites Parts

Rapid Self-Healing Gel Electrolyte Based on Deep Eutectic Solvents for Solid-State Lithium Batteries

Studies on Chemical Composition of Pueraria lobata and Its Anti-Tumor Mechanism

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