Benzene ring crosslinking of sulfonated polystyrene-grafted SEBS (S-SEBS-g-PSt) membrane by Friedel-Crafts reaction for superior desalination performance by pervaporation

2022 ◽  
Author(s):  
Mengyu Yan ◽  
Feixiang Zeng ◽  
Na Li ◽  
Wenhai Bian ◽  
Weiyu Shen ◽  
...  
Keyword(s):  
Benzene Ring ◽  
Functional Groups ◽  
Water Transport ◽  
Membrane Material ◽  
Sulfonated Polystyrene ◽  
Aromatic Polymer

Sulfonated aromatic polymer (SAP) features highly-hydrophilic active functional groups and inherent ionic nano-channels that make it a potential membrane material for desalination. High content of sulfonic groups favors water transport...

Effects of Edge Functional Groups on Water Transport in Graphene Oxide Membranes

2019 ◽  
Vol 11 (8) ◽  
pp. 8483-8491 ◽  
Author(s):  
Ruosang Qiu ◽  
Shi Yuan ◽  
Jie Xiao ◽  
Xiao Dong Chen ◽  
Cordelia Selomulya ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Functional Groups ◽  
Water Transport ◽  
Oxide Membranes ◽  
Graphene Oxide Membranes

scholarly journals Rhodium-catalyzed C–H functionalization-based approach to eight-membered lactams

2015 ◽  
Vol 6 (4) ◽  
pp. 2275-2285 ◽  
Author(s):  
Shangze Wu ◽  
Rong Zeng ◽  
Chunling Fu ◽  
Yihua Yu ◽  
Xue Zhang ◽  
...  
Keyword(s):  
Benzene Ring ◽  
Functional Groups ◽  
Room Temperature ◽  
Ambient Air

Fused tricyclic skeleton in one shot: a RhIII catalyzed formal [4 + 2 + 2] cyclization of N-pivaloyloxybenzamides 1 with 1,6-allene-enes 2 adding two cycles to the benzene ring compatible with ambient air and moisture with a tolerance of many synthetic useful functional groups at room temperature have been developed.

Analyses on Hydrophily and Lipophilicity of Dust in Shanghai Different Traffic Concentration Areas

2011 ◽  
Vol 356-360 ◽  
pp. 990-993
Author(s):  
Jin Xia Yan ◽  
Hai Rong Wang ◽  
Dong Fang Li
Keyword(s):  
Infrared Spectroscopy ◽  
Benzene Ring ◽  
Functional Groups ◽  
Organic Pollutants ◽  
Motor Vehicle ◽  
Vehicle Exhaust ◽  
Spectroscopy Analysis ◽  
Main Component ◽  
Living Area ◽  
Lipophilic Substances

Based on process optimizing, in this article the dust was made a extraction analysis to investigate the ratio of lipophilic substances, which was collected in shanghai different traffic concentration areas. Also, the samples was made a infrared spectroscopy analysis to investigate the organic groups contained. It illustrates that the ratio of lipophilicity in traffic-intensive areas is higher up to 90.1 percent than in living area which is 33.5 percent, those of Shanghai suburb is the littlest, only 12.3 percent. the main functional groups of dust in Shanghai traffic-intensive areas are amino, associating hydroxyl, benzene ring, alkyl and-SH, which is similar to the main component of organic pollutants in motor vehicle exhaust.

Synthesis of 3,4-diaminobenzenethiol and its application in gold nanoparticle-based colorimetric determination of copper ions

RSC Advances ◽  
2016 ◽  
Vol 6 (107) ◽  
pp. 105119-105124 ◽  
Author(s):  
Chi Zhang ◽  
Li-Qiang Lu ◽  
Pan Deng ◽  
Xi-Ke Tian ◽  
Ming-Yang Liu ◽  
...  
Keyword(s):  
Gold Nanoparticle ◽  
Benzene Ring ◽  
Functional Groups ◽  
Copper Ions ◽  
Colorimetric Determination ◽  
Determination Of Copper

3,4-Diaminobenzenethiol can react with AuNPs via a strong covalent Au–S bond. The exposed amino functional groups on the benzene ring from neighboring AuNPs could bind to copper ions, resulting in AuNP aggregation.

FTIR Analysis of Extractable Fractions from FourIndonesian Natural Asphalts

2011 ◽  
Vol 236-238 ◽  
pp. 571-577 ◽  
Author(s):  
Ting Yao ◽  
Zhi Min Zong ◽  
Yu Gao Wang ◽  
Zhe Wen ◽  
Robert Mukasa ◽  
...  
Keyword(s):  
Fourier Transform ◽  
Benzene Ring ◽  
Functional Groups ◽  
Acid Ester ◽  
Structural Changes ◽  
Carboxyl Groups ◽  
Ftir Analysis ◽  
Ftir Spectrometry ◽  
More Care ◽  
Transmission And Reflection

Four natural asphalts (NAs) from Buton Rock, Indonesia, which were abbreviated as BRA-A, BRA-B, BRA-C and BAR-D, were continuously extracted by solvents, subdivided into four fractions and analyzed with Fourier transform infrared (FTIR) spectrometry. The transmission and reflection FTIR techniques were used to distinguish among different samples and fractions and to examine information concerning their structure, composition and structural changes upon fractional extract. Upon FTIR analysis, the methyl, methylene, oxhydryl and carboxyl groups are the major composition of these NAs. Some strong bonds at the zones of 2922-2856 cm-1, 1707-1606 cm-1 , 1453-1373 cm-1 , 1030 cm-1 and 872-748 cm-1 are assigned to >CH2 & -CH3 & –OH in carboxlic acid, ester & benzene ring, >C=O & -C-CH3, –CH2OH, -(CH2)n- & substituted benzene, etc. Much more care should be taken to investigate both N-containing functional groups and mineral multiphase compositions probably present in BRA-B, C and D.

scholarly journals N-Arylbenzo[b]phenothiazines as Reducing Photoredox Catalysts for Nucleophilic Additions of Alcohols to Styrenes: Shift towards Visible Light

Synlett ◽  
2020 ◽  
Author(s):  
Hans-Achim Wagenknecht ◽  
Fabienne Seyfert
Keyword(s):  
Visible Light ◽  
Benzene Ring ◽  
Functional Groups ◽  
Optoelectronic Properties ◽  
Nucleophilic Additions ◽  
Important Class ◽  
Photoredox Catalysis ◽  
Strong Reduction ◽  
Triple Bonds ◽  
Methyl Styrene

Abstract N-Phenylphenothiazines are an important class of photoredox catalysts because they are synthetically well accessible, they allow the tuning of the optoelectronic properties by different substituents, and they have strong reduction properties for activation of alkenes. One of the major disadvantages of N-phenylphenothiazines, however, is the excitation at 365 nm in the UV-A light range. We synthesized three differently dialkylamino-substituted N-phenylbenzo[b]phenothiazines as alternative photoredox catalysts and applied them for the nucleo­philic addition of alkohols to α-methyl styrene. The additional benzene ring shift the absorbance bathochromically and allows performing the photocatalyses by excitation at 385 nm and 405 nm. This type of photoredox catalysis tolerates other functional groups, as representatively shown for alcohols as substrates with C–C and C–N triple bonds.

scholarly journals Mechanism of water transport in graphene oxide laminates

2017 ◽  
Vol 8 (3) ◽  
pp. 1701-1704 ◽  
Author(s):  
Junjiao Deng ◽  
Yi You ◽  
Heriberto Bustamante ◽  
Veena Sahajwalla ◽  
Rakesh K. Joshi
Keyword(s):  
Carbon Nanotubes ◽  
Graphene Oxide ◽  
Functional Groups ◽  
Water Transport ◽  
Transport Mechanisms

The water transport mechanisms recently proposed by various researchers suggest that membranes composed of graphene oxide laminates could be regarded as an assembly of many tiny carbon nanotubes stacked together with attached functional groups as spacers.

scholarly journals Variation of Iodine Mass and Acetylation Time On Cellulose Acetate Synthesis From Rice Straw

2021 ◽  
Vol 8 (3) ◽  
pp. 228-233
Author(s):  
Dewi Umaningrum ◽  
Maria Dewi Astuti ◽  
Radna Nurmasari ◽  
Hasanuddin Hasanuddin ◽  
Ani Mulyasuryani ◽  
...  
Keyword(s):  
Cellulose Acetate ◽  
Functional Groups ◽  
Rice Straw ◽  
Initial Step ◽  
Membrane Material ◽  
Low Viscosity ◽  
Ftir Characterization ◽  
Sensor Field ◽  
Infrared Spectrophotometer

Cellulose acetate is a membrane material that can be used in the sensor field. One source of cellulose acetate is from rice straw. This study aimed to study the effect of iodine mass and acetylation time on cellulose acetate synthesis from rice straw. The initial step is to isolate cellulose from rice straw, followed by cellulose acetate synthesis using iodine catalyst by varying the amount of iodine as much as 0.1-0.3 grams and acetylation time for 1 until 5 hours. The cellulose acetate was characterized using an infrared spectrophotometer, and its viscosity was determined. The result shows that the cellulose 33.63%. The maximum time of cellulose acetate acetylation is 2 hours with a mass of iodine 0.2 g. The yield of cellulose acetate was 14.98%, with an acetyl value of 19.11% and a degree of substitution of 0.89. The cellulose acetate produced has a low viscosity. The FTIR characterization of cellulose acetate shows O-H functional groups at 3333 cm-1, C-H functional groups at ​​2897 cm-1, carbonyl functional groups at 1722 cm-1 C-O functional groups at 1029 cm-1 that were identical in cellulose acetate compounds. The amount of iodine and the acetylation time affected the cellulose acetate product.

scholarly journals Lignin biopolymer: the material of choice for advanced lithium-based batteries

RSC Advances ◽  
2021 ◽  
Vol 11 (38) ◽  
pp. 23644-23653
Author(s):  
Marya Baloch ◽  
Jalel Labidi
Keyword(s):  
Functional Groups ◽  
Redox Properties ◽  
Aromatic Polymer

Lignin, an aromatic polymer, offers interesting electroactive redox properties and abundant active functional groups.

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