scholarly journals Synthesis of a new furan-bearing triazine dichloride compound

2021 ◽  
Vol 63 (4) ◽  
pp. 8-10
Author(s):  
Thi Thuy Dung Phung ◽  
◽  
Thu Thuy Truong ◽  
Thanh Luan Nguyen ◽  
Tran Ha Nguyen ◽  
...  
Keyword(s):  
1H Nmr Spectroscopy ◽  
Proton Nuclear Magnetic Resonance ◽  
Reaction Yield ◽  
Side Group ◽  
Purification Process ◽  
Donor Side ◽  
Donor Acceptor ◽  
First Time ◽  
Layer Chromatography ◽  
Acceptor Moiety

Donor-acceptor compounds have been receiving increased attention lately, especially in opto-electronic applications. In this work, a novel compound named triazine-furan, comprised of a triazine acceptor moiety and a furan donor side group, was designed and synthesised for the first time. The influences of temperature and the feeding proportion of cyanuric chloride to furfurylamine were investigated to optimise the reaction yield and purification process. The synthesised compound was characterised using thin-layer chromatography (TLC), Fourier-transform infrared spectroscopy (FTIR), and proton nuclear magnetic resonance (1H-NMR) spectroscopy.

scholarly journals SYNTHESIS OF AN AZIDE–THIOL LINKER FOR HETEROGENEOUS POLYMER FUNCTIONALIZATION VIA THE “CLICK” REACTION

2018 ◽  
Vol 55 (1B) ◽  
pp. 152
Author(s):  
Thuy Thu Truong
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Click Reaction ◽  
Proton Nuclear Magnetic Resonance ◽  
Reaction Yield ◽  
Reaction Conditions ◽  
Click Reactions ◽  
Heterogeneous Polymer ◽  
Ft Ir ◽  
First Time ◽  
Layer Chromatography

In this study, the synthesis of a telechelic linker bearing both azide and thiol functional groups was described. The reaction conditions were investigated to optimize the reaction yield. The product was analyzed using thin layer chromatography (TLC) and proton nuclear magnetic resonance (1H NMR). The employment of the obtained azide–thiol linker in heterogeneous polymer “click” functionalization was demonstrated for the first time, which was monitored by an online FT–IR method. The obtained telechelic azide–thiol linker is envisioned to be useful chemical tools to link macromolecular chains via orthogonal click reactions.

A novel electron-acceptor moiety as a building block for efficient donor–acceptor based fluorescent organic lighting-emitting diodes

2017 ◽  
Vol 53 (1) ◽  
pp. 263-265 ◽  
Author(s):  
Miao-Miao Xue ◽  
Chen-Chao Huang ◽  
Yi Yuan ◽  
Ye-Xin Zhang ◽  
Man-Keung Fung ◽  
...  
Keyword(s):  
Electron Acceptor ◽  
Building Block ◽  
Fluorescent Material ◽  
Donor Acceptor ◽  
First Time ◽  
Acceptor Moiety

A new electron-withdrawing moiety (BFPz) has been used for the first time as an acceptor in OLEDs and a novel fluorescent material with a D–A structure was synthesized.

scholarly journals SYNTHESIS OF PHENOTHIAZINE DERIVATIVES AS NOVEL MOIETIES TOWARD UTILIZATION IN ALTERNATIVE DONOR – ACCEPTOR CONJUGATED POLYMERS

2018 ◽  
Vol 56 (3B) ◽  
pp. 177
Author(s):  
Khuong Tung Truong ◽  
Ha Tran Nguyen ◽  
Kien Anh Le
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Nmr Spectroscopy ◽  
Conjugated Polymers ◽  
1H Nmr Spectroscopy ◽  
Proton Nuclear Magnetic Resonance ◽  
Phenothiazine Derivatives ◽  
Potential Donor ◽  
Chemical Structures ◽  
Donor Acceptor ◽  
Alternative Donor

Two new phenothiazine – based structures, including 4-(10H-phenothiazin-10-yl)-N,N-diphenylaniline (PDA) and 10-(pyren-1-yl)-10H-phenothiazine (PyP) were synthesized via Buchwald-Hartwig C-N coupling amination using catalytic palladium modulated by electron-rich ligands. Chemical structures were analysed via proton nuclear magnetic resonance (1H NMR) spectroscopy. Then, photo-properties were characterized by UV – Vis absorption spectroscopy in various concentrations of each product. The results showed that PDA and PyP are highly potential donor units for well-performed donor – acceptor conjugated polymers.

scholarly journals The First Application of 1H NMR Spectroscopy for the Assessment of the Authenticity of Perfumes

Molecules ◽  
2021 ◽  
Vol 26 (11) ◽  
pp. 3098
Author(s):  
Barbara Pacholczyk-Sienicka ◽  
Grzegorz Ciepielowski ◽  
Łukasz Albrecht
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Nmr Spectroscopy ◽  
1H Nmr ◽  
1H Nmr Spectroscopy ◽  
Negative Impact ◽  
Poor Quality ◽  
Proton Nuclear Magnetic Resonance ◽  
Simple Method ◽  
Counterfeit Goods ◽  
First Time

The manufacture of counterfeit goods is one of the world’s largest underground businesses and is rapidly growing. Counterfeits can lead not only to the loss of profit for honest producers but also have a negative impact on consumers who pay excessive prices for poor quality goods that may result in health or safety problems. The perfume industry is constantly vulnerable to counterfeits, particularly in the fast developing market of “smell-alike” designer-inspired perfumes because these prompt the identification of the methods that classify their quality. In this paper, the application of proton nuclear magnetic resonance (1H NMR) spectroscopy is employed for the first time to authenticate perfumery products. The molecular composition of several types of authentic brand fragrances for women was compared with cheap inspired equivalents and fakes. Our approach offers the prospect of a fast and simple method for detecting counterfeit perfumes using 1H NMR spectroscopy.

Pharmacognostic studies of Morinda brevipes S. Y. Hu

2019 ◽  
Vol 48 (3) ◽  
pp. 401-407
Author(s):  
Rong Li ◽  
Xiaojing Lin ◽  
Genqiu Tang ◽  
Junni Li ◽  
Dong Wang ◽  
...  
Keyword(s):  
Calcium Oxalate ◽  
Transverse Section ◽  
Volatile Oils ◽  
Needle Crystal ◽  
Cork Cell ◽  
Registration Number ◽  
Phytochemical Studies ◽  
First Time ◽  
Layer Chromatography ◽  
Inequality Type

DNA barcoding of ITS and psbA-trnH regions, histochemistry as well as thin layer chromatography (TLC) of Morinda brevipes S.Y. Hu were analyzed. Transverse section of root revealed the presence of cortex, xylem, cork cell, stone cells, and calcium oxalate sandy crystal. The lower epidermis cells showed many stoma in paracytic or inequality type. Spiral vessel and tiny calcium oxalate needle crystal usually appeared in the powder. TLC showed the presence of emodin in M. brevipes. Phytochemical studies revealed the existence of carbohydrates, saponins, tannins, flavones, anthraquinones, alkaloids and volatile oils. The ITS and psbAtrnH sequences were found for the first time which were submitted to NCBI to obtain the GenBank registration number. This study might play an important role in the identification, and utilization of M. brevipes for various purposes.

An expanded isoindigo unit as a new building block for a conjugated polymer leading to high-performance solar cells

2014 ◽  
Vol 2 (15) ◽  
pp. 5427-5433 ◽  
Author(s):  
Shugang Li ◽  
Zhongcheng Yuan ◽  
Jianyu Yuan ◽  
Ping Deng ◽  
Qing Zhang ◽  
...  
Keyword(s):  
Solar Cells ◽  
Solar Cell ◽  
Building Block ◽  
Conjugated Polymer ◽  
High Performance ◽  
Fill Factor ◽  
Solar Cell Device ◽  
Donor Acceptor ◽  
First Time

An expanded isoindigo unit (IBTI) has been incorporated into a donor–acceptor conjugated polymer for the first time. The PCE of the solar cell device based on the new polymer reached 6.41% with a fill factor of 0.71.

Well-defined star-shaped donor–acceptor conjugated molecules for organic resistive memory devices

2015 ◽  
Vol 51 (75) ◽  
pp. 14179-14182 ◽  
Author(s):  
Hung-Chin Wu ◽  
Jicheng Zhang ◽  
Zhishan Bo ◽  
Wen-Chang Chen
Keyword(s):  
Charge Storage ◽  
Memory Devices ◽  
Resistive Memory ◽  
Conjugated Molecules ◽  
Storage Materials ◽  
End Groups ◽  
Donor Acceptor ◽  
Solution Processable ◽  
First Time

Solution processable star-shaped donor–acceptor conjugated molecules are explored for the first time as charge storage materials for resistor-type memory devices with a triphenylamine (donor) core, and three 1.8-naphthalimide (acceptors) end-groups.

scholarly journals Impact of Esterification on Physicochemical Properties of Cellulosic Fabric using Balanites Aegyptiaca Seed Oil

2019 ◽  
pp. 1-13
Author(s):  
F. I. Omizegba ◽  
K. A. Bello ◽  
H. M. Adamu ◽  
D. E. A. Boryo ◽  
J. O. Abayeh ◽  
...  
Keyword(s):  
Physicochemical Properties ◽  
Seed Oil ◽  
Toxic Chemicals ◽  
Purification Process ◽  
Balanites Aegyptiaca ◽  
Remarkable Improvement ◽  
Weft Direction ◽  
Textile Finishing ◽  
Cellulosic Fabric ◽  
First Time

This paper presents the results of some physicochemical properties of cellulosic fabric obtained by esterification using 50 cm3 of oil extracted from the seed of Balanites aegyptiaca. The oil was extracted under reflux with hexane which gave 40% yield and 0.22% moisture content. The identified cellulosic materials 10 cm and 21 cm x 2.5 cm) were subjected to purification process of scouring, bleaching and mercerization to obtain cleaner, whiter and stronger fabric that could withstand esterification treatment. The yarn crimp was 25% and 15% for warp and weft direction respectively, while the grey fabric gave the lowest of 5% and 8% for warp and weft directions. The linear density (45 tex) was recorded for the esterified fabric compared to 37 tex for the grey fabric along warp direction. The fabric sett increased from 24 thd/cm for grey to 27 thd/cm for esterified along warp direction and 16 thd/cm to 23 thd/cm along weft direction. There was an obvious reduction in shrinkage from 31 for mercerized fabric to 28 along warp direction after esterification and 21 to 19 along weft direction. The tensile parameter was 262.60 N and 166.24 N with extension of 13.92 mm and 12.23 mm along warp and weft directions respectively while the grey fabric recorded 223.87 N and 109.39 N with extensions of 3.64 mm and 3.56 mm in warp and weft direction respectively. There was a remarkable improvement in the dry and wet crease recovery angles after esterification (105º dry and 65º wet, 102º dry and 59º wet) along warp and weft direction respectively. The grey fabric gave the lowest crease recovery (50º dry and 37º wet, 45º dry and 35º wet) along warp and weft directions respectively. The esterified fabric recorded lower water absorption. The improvements in the investigated properties may be due to dimensional stability, flexibility and fineness due to esterification. This research is commendable because biodegradable organic seed oil is used to modify the physicochemical properties of cellulosic fabric for the first time. These incredible effects of the seed oil on cellulose is an immense contribution to knowledge, hence the oil is recommended for replacement of the present day toxic chemicals used in textile finishing of cellulosic fabrics.

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