scholarly journals A High-Yield Synthesis of Chalcopyrite CuInS2Nanoparticles with Exceptional Size Control

2009 ◽  
Vol 2009 ◽  
pp. 1-7 ◽  
Author(s):  
Chivin Sun ◽  
Joseph S. Gardner ◽  
Endrit Shurdha ◽  
Kelsey R. Margulieux ◽  
Richard D. Westover ◽  
...  
Keyword(s):  
Microwave Irradiation ◽  
Size Control ◽  
High Yield ◽  
Single Source ◽  
Icp Oes ◽  
Single Source Precursors ◽  
H Nmr ◽  
High Yields ◽  
Size Controlled

We report high-yield and efficient size-controlled syntheses of Chalcopyrite CuInS2nanoparticles by decomposing molecular single source precursors (SSPs) via microwave irradiation in the presence of 1,2-ethanedithiol at reaction temperatures as low as 100°C and times as short as 30 minutes. The nanoparticles sizes were 1.8 nm to 10.8 nm as reaction temperatures were varied from 100°C to 200°C with the bandgaps from 2.71 eV to 1.28 eV with good size control and high yields (64%–95%). The resulting nanoparticles were analyzed by XRD, UV-Vis, ICP-OES, XPS, SEM, EDS, and HRTEM. Titration studies by1H NMR using SSP1with 1,2-ethanedithiol and benzyl mercaptan were conducted to elucidate the formation of Chalcopyrite CuInS2nanoparticles.

scholarly journals Synthesis and Characterization of Novel 1,3-Thiazole and 2-Amino-1,3,4-Thiadiazole Derivatives

2014 ◽  
Vol 33 (2) ◽  
pp. 189 ◽  
Author(s):  
Mustafa Er ◽  
Ayşe Şahin ◽  
Hakan Tahtacı
Keyword(s):  
Biological Activities ◽  
High Yield ◽  
Synthesis And Characterization ◽  
Hantzsch Reaction ◽  
H Nmr ◽  
Thiadiazole Derivatives ◽  
High Yields ◽  
Mass Spectrometric Techniques ◽  
C Nmr

<p>Thiosemicarbazone derivatives <strong>3a–e</strong> were synthesized by the reaction of various aldehydes<strong> 1a–e</strong> with 4-methyl thiosemicarbazide <strong>2</strong> in 78% to 90% yield. Then, the thiazole moieties of the target materials <strong>5a–e</strong> were obtained in high yields (71–93%) using the Hantzsch reaction utilizing thiosemicarbazone derivatives <strong>3a–e</strong> with ethyl-2-chloroacetoacetic ester. The substituted nitrile derivatives <strong>7a–e</strong> were obtained in moderate to high yield (58–84%) from the reaction of compounds <strong>5a–e</strong> with chloroacetonitrile by the nucleophilic aliphatic substitution reaction in the presence of anhydrous potassium carbonate. Finally, substituted 2-amino-1,3,4-thiadiazole compounds <strong>9a–e</strong> were obtained in moderate to good yields (51–62%) from the reaction of thiosemicarbazide with substituted nitrile derivatives <strong>7a–e</strong>. As a result, compounds that all share a high disposition for biological activities were obtained. The structures of the newly synthesized compounds were confirmed by IR, <sup>1</sup>H NMR, <sup>13</sup>C NMR, elemental analysis, and mass spectrometric techniques.</p>

Synthesis and Crystal Structure of (1E,2E)-1,2-Di (-3-Nitrobenzylidene) Hydrazine under Micromave Irradiation

2013 ◽  
Vol 787 ◽  
pp. 205-207
Author(s):  
Hong Yan Zhou
Keyword(s):  
Crystal Structure ◽  
Microwave Irradiation ◽  
Monoclinic Space Group ◽  
Stacking Interactions ◽  
X Ray Diffraction ◽  
Synthesis And Crystal Structure ◽  
X Ray ◽  
H Nmr ◽  
The Stability ◽  
High Yields

A compound of (1E,2E)-1,2-di (-3-nitrobenzylidene) hydrazine was synthesized under microwave irradiation (500 w), giving high yields of products (93%). Its structure was determined IR, 1H NMR, MS, elemental analysis and X-ray diffraction. The crystal of the compound is Monoclinic, space group P2(1)/n with a = 6.9611(18), b = 7.823(2), c = 12.999(3) Å, α = 90, β = 105.215(4), γ = 90o, V= 683.1(3) Å3, Z=4, Dc=1.450g/cm3,μ=0.110 mm-1, F(000)=308, R=0.0401 and wR = 0.1131 for 1273 observed reflection with I>2σ (I). π-π stacking interactions contribute to the stability of the structure.

Intriguing structural chemistry of neutral and anionic layered monoalkylphosphates: single-source precursors for high-yield ceramic phosphates

CrystEngComm ◽  
2017 ◽  
Vol 19 (36) ◽  
pp. 5390-5401 ◽  
Author(s):  
Gulzar A. Bhat ◽  
Alok Ch. Kalita ◽  
Ramaswamy Murugavel
Keyword(s):  
Thermal Instability ◽  
Structural Chemistry ◽  
High Yield ◽  
Metal Phosphate ◽  
Single Source ◽  
Single Source Precursors ◽  
Phosphate Monoesters ◽  
Simple Protocol

A simple protocol for multi-gram synthesis of unstable and normally inaccessible phosphate monoesters ROPO3H2 is reported, apart from demonstration of their thermal instability and utility as starting materials for metal phosphate single source precursors.

The synthesis of uridine diphosphate N-acetylhexosamines and uridine 5′-(2-acetamido-2-deoxy-α-D-mannopyranosyluronic acid diphosphate)

1981 ◽  
Vol 59 (15) ◽  
pp. 2247-2252 ◽  
Author(s):  
Tatsumi Yamazaki ◽  
Christopher D. Warren ◽  
Annette Herscovics ◽  
Roger W. Jeanloz
Keyword(s):  
Platinum Catalyst ◽  
Optical Rotation ◽  
Exchange Chromatography ◽  
High Yield ◽  
Uridine Diphosphate ◽  
Nmr Spectrum ◽  
H Nmr ◽  
Catalytic Hydrogenolysis ◽  
High Yields ◽  
Biosynthetic Studies

2-Methyl-(2-acetamido-3,4,6-tri-O-acetyl-l,2-dideoxy-β-D-mannopyrano)-[2,1-d]-2-oxazoline was efficiently converted into 2-acetamido-3,4,6-tri-O-acetyl-2-deoxy-α-D-mannopyranosyl phosphate, by treatment with dibenzyl phosphate, followed by catalytic hydrogenolysis of the benzyl groups. Similarly, 2-acetamido-3,4,6-tri-O-acetyl-2-deoxy-α-D-glucopyranosyl phosphate and -galactopyranosyl phosphate were synthesized from the respective peracetyl oxazolines. In each case, the procedures for preparing the oxazoline, and conversion into the glycosyl phosphate, were modified to give high yields of pure products. 2-Acetamido-3,4,6-tri-O-acetyl-2-deoxy-α-D-mannopyranosyl phosphate was coupled with 2′,3′-di-O-acetyluridine 5′-monophosphate by a modification of the mixed anhydride procedure, to give 2',3'-di-O-acetyluridine 5′-(2-acetamido-3,4,6-tri-O-acetyl-2-deoxy-α-D-mannopyranosyl diphosphate), which was readily purified by preparative tic and O-deacetylated to give "uridine diphosphate N-acetylmannosamine" in high yield. Similarly, uridine 5′-(2-acetamido-2-deoxy-α-D-glucopyranosyl- and -galactopyranosyl diphosphates) were synthesized by rapid, efficient procedures, not involving ion-exchange chromatography. Uridine 5′-(2-acetamido-2-deoxy-α-D-mannopyranosyl diphosphate) was converted into uridine 5′-(2-acetamido-2-deoxy-α-D-mannopyranosyluronic acid diphosphate), required for biosynthetic studies, without the preparation of a special platinum catalyst. All the synthetic uridine diphosphate sugars were characterized by optical rotation, 1H nmr spectrum, and elemental analysis.

One-pot synthesis and characterization of chalcopyrite CuInS2 nanoparticles

2014 ◽  
Vol 2 (27) ◽  
pp. 10629-10633 ◽  
Author(s):  
Chivin Sun ◽  
Zehra Cevher ◽  
Jin Zhang ◽  
Bo Gao ◽  
Kai Shum ◽  
...  
Keyword(s):  
Reaction Times ◽  
Synthesis And Characterization ◽  
Single Source ◽  
One Pot ◽  
Single Source Precursors ◽  
Mercaptopropionic Acid ◽  
One Pot Synthesis ◽  
High Yields

We synthesized tetragonal chalcopyrite CuInS2 (CIS) nanoparticles from molecular single source precursors, (Ph3P)2Cu-(μ-SEt)2In(SEt)2, by a one-pot reaction in the presence of 3-mercaptopropionic acid at reaction times of 3 hours or less with high yields.

Controlled Stoichiometry for Quaternary CuInxGa1−xS2Chalcopyrite Nanoparticles from Single-Source Precursors via Microwave Irradiation

2010 ◽  
Vol 22 (9) ◽  
pp. 2699-2701 ◽  
Author(s):  
Chivin Sun ◽  
Joseph S. Gardner ◽  
Gary Long ◽  
Cyril Bajracharya ◽  
Aaron Thurber ◽  
...  
Keyword(s):  
Microwave Irradiation ◽  
Single Source ◽  
Single Source Precursors

scholarly journals Polyol-mediated synthesis of size-controlled copper nanoparticles under microwave irradiation

2019 ◽  
Vol 17 (12.1) ◽  
pp. 21
Author(s):  
Anh Trần Thị Kiều ◽  
Trung Đặng Bảo
Keyword(s):  
Microwave Irradiation ◽  
Copper Nanoparticles ◽  
Inductively Coupled Plasma ◽  
Size Control ◽  
X Ray Diffraction ◽  
Inductively Coupled ◽  
Transmission Electron ◽  
Icp Ms ◽  
Plasma Mass Spectrometry ◽  
Size Controlled

In this research, well-dispersed zero-valent copper nanoparticles (CuNPs) were successfully synthesized from a well-defined complex of [Cu(OH)(TMEDA)]2Cl2 in neat glycerol via a polyol method, under microwave irradiation (MW) assistance. The as-prepared CuNPs were thoroughly characterized by means of various techniques such as inductively coupled plasma mass spectrometry (ICP-MS), Ultraviolet-visible spectroscopy (UV-vis), X-ray diffraction (XRD) and transmission electron microscopy (TEM) analyses, evidencing the formation of the spherical nanoparticles with the range of 3.24.2 nm in mean diameter. In addition, the size control of obtained CuNPs was examined via reaction time, thereby showing that the formation of CuNPs conformed to the model of “mono-dispersion”.

Evaluation of germ plasm for resistant to Soybean mosaic virus (SMV)

2020 ◽  
Vol 21 (1) ◽  
pp. 6-9
Author(s):  
Wuye Ria Andayanie
Keyword(s):  
Abiotic Stress ◽  
Environmental Factors ◽  
Mosaic Virus ◽  
Polyclonal Antibody ◽  
Symptom Severity ◽  
Germ Plasm ◽  
Polyclonal Antibodies ◽  
Soybean Mosaic Virus ◽  
High Yield ◽  
High Yields

Soybean superior varieties with high yields and are resistant to abiotic stress have been largely released, although some varieties grown in the field are not resistant to SMV. In addition, the opportunity to obtain lines of hope as prospective varieties with high yield and resistance to SMV is very small. The method for evaluating soybean germplasm is based on serological observations of 98 accessions of leaf samples from SMV inoculation with T isolate. The evaluation results of 98 accessions based on visual observations showed 31 genotypes reacting very resistant or healthy to mild resistant category to SMV T isolate  with a percentage of symptom severity of 0 −30 %. Among 31 genotypes there are 2 genotypes (PI 200485; M8Grb 44; Mlg 3288) with the category of visually very resistant and resistant, respectively and  Mlg 3288  with the category of mild resistant.  They have a good agronomic appearance with a weight of 100 seeds (˃10 g) and react negatively with polyclonal antibodies to SMV, except Mlg 3288 reaction is not consistent, despite the weight of 100 seeds (˃ 10 g). Leaf samples from 98 accessions revealed various symptoms of SMV infection in the field. This diversity of symptoms is caused by susceptibility to accession, when infection occurs, and environmental factors. Keywords—: soybean; genotipe; Soybean mosaic virus (SMV); disease severity; polyclonal  antibody

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