13C NMR and XPS characterization of anion adsorbent with quaternary ammonium groups prepared from rice straw, corn stalk and sugarcane bagasse

2019 ◽

Vol 9 (02) ◽

Author(s):

Zena G. Alrecabi ◽

Zainab Amer ◽

Naeemah Al-Lami

Keyword(s):

Schiff Base ◽

13C Nmr ◽

Azo Dyes ◽

Spectral Methods ◽

Anthranilic Acid ◽

Heterocyclic Compounds ◽

Synthesis And Characterization ◽

Cooh Group ◽

Molecular Weights

This study including prepared new colored esters containing heterocyclic with high molecular weights. In the first part of work we synthesized azo dyes [1,2] from the reaction p-toluidine with β-naphthol and o-nitro phenol, thin we synthesized Schiff bases [3,4] by the reaction anthranilic acid with benzaldehyde and dimethyl benzaldehyde. The reaction azo dyes (contain OH group) with Schiff base (contain COOH group) these led to produce the new colored esters [A1-A4]. The second part of work was modification the (C=N-) group in esters to heterocyclic compounds by reacting with phenyl iso cyanide to produce new β-lactam [B1-B4] and with anthranilic acid to get new hydroquinazoline [C1-C4]. All these compounds were characterized by physical properties and spectral methods FTIR, 1H-NMR and 13C-NMR.

Download Full-text

Synthesis and Spectral Characterization of New S-Alkylated 1,2,4-Triazoles as Potential Biological Agents

Revista de Chimie ◽

10.37358/rc.17.10.5900 ◽

2017 ◽

Vol 68 (10) ◽

pp. 2436-2439

Author(s):

Stefania Felicia Barbuceanu ◽

Laura Ileana Socea ◽

Constantin Draghici ◽

Elena Mihaela Pahontu ◽

Theodora Venera Apostol ◽

...

Keyword(s):

Mass Spectrometry ◽

Spectral Data ◽

1H Nmr ◽

Elemental Analysis ◽

13C Nmr ◽

Ethyl Bromide ◽

Spectral Characterization ◽

Basic Medium ◽

Phenacyl Bromide

In the work we presented the behavior of 5-(4-(4-X-phenylsulfonyl)phenyl)-4-(n-propyl)-2H-1,2,4-triazole-3(4H)-thiones (X= Cl or Br) with some alkylation agents. Thus, new S-alkylated 1,2,4-triazole derivatives were synthesized by reaction of the corresponding 1,2,4-triazole-3-thione derivatives with different �-halogenated compounds (ethyl bromide, ethyl chloroacetate or phenacyl bromide), in basic medium. The structures of synthesized compounds were elucidated by spectral data (1H-NMR, 13C-NMR, mass spectrometry) and elemental analysis.

Download Full-text

Fractionation and characterization of lignin from waste rice straw: Biomass surface chemical composition analysis

International Journal of Biological Macromolecules ◽

10.1016/j.ijbiomac.2019.10.068 ◽

2020 ◽

Vol 145 ◽

pp. 795-803 ◽

Cited By ~ 6

Author(s):

Shubhangi De ◽

Shubham Mishra ◽

Elangovan Poonguzhali ◽

Mathur Rajesh ◽

Krishnamurthi Tamilarasan

Keyword(s):

Chemical Composition ◽

Rice Straw ◽

Composition Analysis ◽

Surface Chemical ◽

Surface Chemical Composition ◽

Chemical Composition Analysis

Download Full-text

Combined High-Resolution Solid-State 1H/13C NMR Spectroscopy and 1H NMR Relaxometry for the Characterization of Kerogen Thermal Maturation

Energy & Fuels ◽

10.1021/acs.energyfuels.0c02713 ◽

2020 ◽

Author(s):

Francesco Panattoni ◽

Jonathan Mitchell ◽

Edmund J. Fordham ◽

Ravinath Kausik ◽

Clare P. Grey ◽

...

Keyword(s):

Solid State ◽

Nmr Spectroscopy ◽

High Resolution ◽

1H Nmr ◽

13C Nmr ◽

13C Nmr Spectroscopy ◽

Thermal Maturation ◽

Nmr Relaxometry ◽

1H Nmr Relaxometry

Download Full-text

Preparation and characterization of biomass briquettes using sugarcane bagasse, corncob and rice husk

Materials Today Proceedings ◽

10.1016/j.matpr.2021.04.457 ◽

2021 ◽

Author(s):

J. Nagarajan ◽

L. Prakash

Keyword(s):

Sugarcane Bagasse ◽

Rice Husk

Download Full-text

Preparing Process and Properties of Collagen Modified Cotton Fiber

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.236-238.1415 ◽

2011 ◽

Vol 236-238 ◽

pp. 1415-1419 ◽

Cited By ~ 1

Author(s):

Yun Hui Xu ◽

Zhao Fang Du

Keyword(s):

Cotton Fiber ◽

Treatment Time ◽

Ph Value ◽

Periodate Oxidation ◽

Aqueous Acetic Acid ◽

Collagen Concentration ◽

Acid Media ◽

Xps Characterization ◽

Aldehyde Groups

In order to develop cotton fabric underwear with the health care function, the cotton fiber was modified with the collagen (CMCF) using periodate oxidation method. The aldehyde groups on the glucose chains of the oxidized cotton cellulose were reacted with the amino groups of collagen to obtain the CMCF, and the oxidized cellulose was crosslinked with collagen in aqueous acetic acid media. The effects of collagen concentration, treatment time, reaction temperature, pH value of solution and periodate concentration on the amount of collagen crosslinked on cotton fiber were respectively discussed, and the optimal reaction technology was obtained. XPS characterization of the modified cotton fiber showed a characteristic peak about 400.0–405.0 eV corresponding to collagen, which indicated that the collagen was combined on the surface of cotton fiber. The mechanical properties of the collagen modified cotton fiber were improved. The resulting CMCF is a new natural ecological fiber and has the extensive application as a carrier for the controlled release of drugs.

Download Full-text