scholarly journals High-yield Aromatic Monomers and Pure Cellulose Production by Oxidative Catalytic Fractionation of Lignocellulose in the presence of CuO Nanoparticles

2021 ◽  
Author(s):  
Yuting Zhu ◽  
Yuhe Liao ◽  
Luying Lu ◽  
Wei Lv ◽  
Jing Liu ◽  
...  
Keyword(s):  
Cuo Nanoparticles ◽  
Water Soluble ◽  
High Yield ◽  
Cellulose Production ◽  
Carbon Efficiency ◽  
Mild Conditions ◽  
Pure Cellulose ◽  
Cuo Nps ◽  
Lignocellulosic Feedstock ◽  
High Cellulose

<a></a><a>Herein, we report the catalytic use of multifunctional CuO nanoparticles (NPs) to oxidatively fractionate lignocellulosic feedstock with dioxygen in aqueous NaOH under mild conditions . In presence of CuO NPs, lignocellulose is fractionated into three parts, overall yielding 90% carbon efficiency. Lignin is converted to up to 45.6 wt% in organic soluble aromatic aldehyde monomers, rich in vanillin and syringaldehyde, the value surpassing the theoretical one based on b-O-4 bond content, indicating significant cleavage of other ether bonds. All hemicellulose is selectively converted into water soluble small (di)acids, mainly to oxalic acid. Up to 81% of cellulose, in contrast, is obtained as a white crystalline residue with high cellulose purity (over 95%), which can readily be transformed into high quality nanocellulose, useful in many applications.</a>

scholarly journals High-yield Aromatic Monomers and Pure Cellulose Production by Oxidative Catalytic Fractionation of Lignocellulose in the presence of CuO Nanoparticles

2021 ◽  
Author(s):  
Yuting Zhu ◽  
Yuhe Liao ◽  
Luying Lu ◽  
Wei Lv ◽  
Jing Liu ◽  
...  
Keyword(s):  
Cuo Nanoparticles ◽  
Water Soluble ◽  
High Yield ◽  
Cellulose Production ◽  
Carbon Efficiency ◽  
Mild Conditions ◽  
Pure Cellulose ◽  
Cuo Nps ◽  
Lignocellulosic Feedstock ◽  
High Cellulose

<a></a><a>Herein, we report the catalytic use of multifunctional CuO nanoparticles (NPs) to oxidatively fractionate lignocellulosic feedstock with dioxygen in aqueous NaOH under mild conditions . In presence of CuO NPs, lignocellulose is fractionated into three parts, overall yielding 90% carbon efficiency. Lignin is converted to up to 45.6 wt% in organic soluble aromatic aldehyde monomers, rich in vanillin and syringaldehyde, the value surpassing the theoretical one based on b-O-4 bond content, indicating significant cleavage of other ether bonds. All hemicellulose is selectively converted into water soluble small (di)acids, mainly to oxalic acid. Up to 81% of cellulose, in contrast, is obtained as a white crystalline residue with high cellulose purity (over 95%), which can readily be transformed into high quality nanocellulose, useful in many applications.</a>

scholarly journals Electronic and Assembly Properties of a Water-Soluble Blue Naphthalene Diimide

2021 ◽  
Author(s):  
Thomas Welsh ◽  
Olga Matsarskaia ◽  
Ralf Schweins ◽  
Emily Rose Draper
Keyword(s):  
Careful Consideration ◽  
Water Soluble ◽  
Mild Conditions ◽  
Deep Blue ◽  
Naphthalene Diimide

Herein we report on the synthesis and characterisation of a water soluble deep blue naphthalene diimide, (iPrNH)2NDI‒V. The synthesis is performed under mild conditions and careful consideration of the purification...

Eco-Friendly Synthesis of Sulphonic Acid Oxime Esters Catalyzed by 2-(1H-Benzotriazole-1-yl)-1,1,3,3-Tetramethyluronium Tetrafluoroborate

2014 ◽  
Vol 525 ◽  
pp. 93-96
Author(s):  
Wei Shi ◽  
Ji Ming Zhang ◽  
Jian Hua Zhou ◽  
Jian Hua Zhou ◽  
Song Song Ding
Keyword(s):  
High Selectivity ◽  
Sulphonic Acid ◽  
Present Approach ◽  
High Yield ◽  
Facile Synthesis ◽  
Reaction Duration ◽  
Mild Conditions ◽  
Environmental Friendly

Herein we describle a facile synthesis of sulphonic acid oxime esters in acetonitrile from the corresponding sulphonic acids and oximes catalyzed by the environmental friendly 2-(1H-benzotriazole-1-yl)-1,1,3,3-tetramethyluronium tetrafluoroborate (TBTU) in the presence of triethylamine (TEA) under mild conditions. The present approach offers the advantages of a clean reaction, simple methodology, employing readily available catalyst, short reaction duration, high selectivity and high yield.

Regioselective 1,4-conjugate aza-Michael addition of dienones with benzotriazole

2017 ◽  
Vol 23 (4) ◽  
Author(s):  
Zheng Li ◽  
Tianpeng Li ◽  
Rugang Fu ◽  
Jingya Yang
Keyword(s):  
Transition Metal ◽  
Michael Addition ◽  
Potassium Acetate ◽  
High Yield ◽  
Metal Free ◽  
Mild Conditions

AbstractThe regioselective 1,4-conjugate aza-Michael addition of dienones with benzotriazole catalyzed by potassium acetate is described. A series of 3-(benzotriazol-1-yl)-1,5-diarylpent-4-en-1-ones were efficiently synthesized under mild conditions. This protocol has advantages of transition-metal free catalyst, high yield and high regioselectivity.

scholarly journals High yield accelerated reactions in nonvolatile microthin films: chemical derivatization for analysis of single-cell intracellular fluid

2018 ◽  
Vol 9 (40) ◽  
pp. 7779-7786 ◽  
Author(s):  
Zhenwei Wei ◽  
Xiaochao Zhang ◽  
Jinyu Wang ◽  
Sichun Zhang ◽  
Xinrong Zhang ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Single Cell ◽  
Individual Cell ◽  
High Yield ◽  
Chemical Derivatization ◽  
Intracellular Fluid ◽  
Mild Conditions ◽  
Successful Analysis ◽  
Trace Components

The identification of trace components from an individual cell can require derivatization under mild conditions for successful analysis by mass spectrometry (MS).

scholarly journals Green Preparation of High Yield Fluorescent Graphene Quantum Dots from Coal-Tar-Pitch by Mild Oxidation

Nanomaterials ◽  
2018 ◽  
Vol 8 (10) ◽  
pp. 844 ◽  
Author(s):  
Quanrun Liu ◽  
Jingjie Zhang ◽  
He He ◽  
Guangxu Huang ◽  
Baolin Xing ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Coal Tar ◽  
Graphene Quantum Dots ◽  
High Yield ◽  
Coal Tar Pitch ◽  
Narrow Size Distribution ◽  
Material Source ◽  
Graphene Layers ◽  
Mild Conditions ◽  
Simple Strategy

Coal tar pitch (CTP), a by-product of coking industry, has a unique molecule structure comprising an aromatic nucleus and several side chains bonding on this graphene-like nucleus, which is very similar to the structure of graphene quantum dots (GQDs). Based on this perception, we develop a facile approach to convert CTP to GQDs only by oxidation with hydrogen peroxide under mild conditions. One to three graphene layers, monodisperse GQDs with a narrow size distribution of 1.7 ± 0.4 nm, are obtained at high yield (more than 80 wt. %) from CTP. The as-produced GQDs are highly soluble and strongly fluorescent in aqueous solution. This simple strategy provides a feasible route towards the commercial synthesis of GQDs for its cheap material source, green reagent, mild condition, and high yield.

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