Purification and In Situ Ligand Exchange of Metal-Carboxylate-Treated Fluorescent InP Quantum Dots via Gel Permeation Chromatography

2017 ◽  
Vol 8 (17) ◽  
pp. 4055-4060 ◽  
Author(s):  
Adam Roberge ◽  
Jennifer L. Stein ◽  
Yi Shen ◽  
Brandi M. Cossairt ◽  
Andrew B. Greytak
Keyword(s):  
Quantum Dots ◽  
Ligand Exchange ◽  
Gel Permeation Chromatography ◽  
Metal Carboxylate ◽  
Gel Permeation ◽  
Inp Quantum Dots

Purification of Quantum Dots by Gel Permeation Chromatography and the Effect of Excess Ligands on Shell Growth and Ligand Exchange

2013 ◽  
Vol 25 (14) ◽  
pp. 2838-2848 ◽  
Author(s):  
Yi Shen ◽  
Megan Y. Gee ◽  
Rui Tan ◽  
Perry J. Pellechia ◽  
Andrew B. Greytak
Keyword(s):  
Quantum Dots ◽  
Ligand Exchange ◽  
Shell Growth ◽  
Gel Permeation Chromatography ◽  
Gel Permeation

In situ ligand exchange of thiol-capped CuInS2/ZnS quantum dots at growth stage without affecting luminescent characteristics

2011 ◽  
Vol 363 (2) ◽  
pp. 703-706 ◽  
Author(s):  
Hyunki Kim ◽  
Minwon Suh ◽  
Byung-Hwa Kwon ◽  
Dong Seon Jang ◽  
Sung Wook Kim ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Ligand Exchange ◽  
Growth Stage

The in situ ligand exchange linker-assisted assembly of oil-soluble CdSe quantum dots to TiO2 films

2019 ◽  
Vol 475 ◽  
pp. 813-819 ◽  
Author(s):  
Di Zhang ◽  
Pin Ma ◽  
Shuo Wang ◽  
Mingpeng Xia ◽  
Sidong Zhang ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Ligand Exchange ◽  
Cdse Quantum Dots ◽  
Tio2 Films

Real time in situ monitoring of stacked InAs/InP quantum dots by spectral reflectance

2003 ◽  
Vol 248 ◽  
pp. 201-205 ◽  
Author(s):  
Kwangmin Park ◽  
Heedon Hwang ◽  
Jong-Hoon Kang ◽  
Sukho Yoon ◽  
Yong Dong Kim ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Real Time ◽  
Spectral Reflectance ◽  
In Situ Monitoring ◽  
Inp Quantum Dots

scholarly journals Gel permeation chromatography as a multifunctional processor for nanocrystal purification and on-column ligand exchange chemistry

2016 ◽  
Vol 7 (9) ◽  
pp. 5671-5679 ◽  
Author(s):  
Yi Shen ◽  
Adam Roberge ◽  
Rui Tan ◽  
Megan Y. Gee ◽  
Dylan C. Gary ◽  
...  
Keyword(s):  
Ligand Exchange ◽  
Continuous Flow ◽  
Flow System ◽  
Gel Permeation Chromatography ◽  
Continuous Flow System ◽  
System P ◽  
Gel Permeation

GPC provides a general approach to purification of a variety of nanocrystal types, and additionally achieves ligand exchange in a continuous flow system.

In Situ Synthesis of Thiol-Capped CuInS2-ZnS Quantum Dots Embedded in Silica Powder by Sequential Ligand-Exchange and Silanization

2011 ◽  
Vol 15 (2) ◽  
pp. K16-K18 ◽  
Author(s):  
H. Kim ◽  
H. S. Jang ◽  
B.-H. Kwon ◽  
M. Suh ◽  
K. Youngsun ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Ligand Exchange ◽  
In Situ Synthesis ◽  
Silica Powder

scholarly journals 1-n-Butyl-3-methylimidazolium-2-carboxylate: a versatile precatalyst for the ring-opening polymerization of ε-caprolactone and rac-lactide under solvent-free conditions

2013 ◽  
Vol 9 ◽  
pp. 647-654 ◽  
Author(s):  
Astrid Hoppe ◽  
Faten Sadaka ◽  
Claire-Hélène Brachais ◽  
Gilles Boni ◽  
Jean-Pierre Couvercelle ◽  
...  
Keyword(s):  
Differential Scanning Calorimetry ◽  
Ring Opening ◽  
Gel Permeation Chromatography ◽  
Ring Opening Polymerization ◽  
Solvent Free ◽  
Scanning Calorimetry ◽  
H Nmr ◽  
Solvent Free Conditions ◽  
Gel Permeation

The ring-opening polymerization of ε-caprolactone (ε-CL) and rac-lactide (rac-LA) under solvent-free conditions and using 1-n-butyl-3-methylimidazolium-2-carboxylate (BMIM-2-CO2) as precatalyst is described. Linear and star-branched polyesters were synthesized by successive use of benzyl alcohol, ethylene glycol, glycerol and pentaerythritol as initiator alcohols, and the products were fully characterized by 1H and 13C{1H} NMR spectroscopy, gel permeation chromatography (GPC), and differential scanning calorimetry (DSC). BMIM-2-CO2 acts as an N-heterocyclic carbene precursor, resulting from in situ decarboxylation, either by heating under vacuo (method A) or by addition of NaBPh4 (method B). Possible catalytic and deactivation mechanisms are proposed.

scholarly journals Synthesis of Highly Luminescent InP/ZnS Quantum Dots with Suppressed Thermal Quenching

Coatings ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 581
Author(s):  
Linyuan Lian ◽  
Youyou Li ◽  
Daoli Zhang ◽  
Jianbing Zhang
Keyword(s):  
Quantum Dots ◽  
White Light ◽  
Room Temperature ◽  
Thermal Quenching ◽  
Sensitivity Function ◽  
Photoluminescence Quantum Yield ◽  
Phosphorus Source ◽  
Down Conversion ◽  
Inp Quantum Dots

InP quantum dots (QDs) are promising down-conversion phosphors for white light LEDs. However, the mainstream InP QDs synthesis uses expensive phosphorus source. Here, economic, in situ-generated PH3 is used to synthesize InP QDs and a two-step coating of ZnS shells is developed to prepare highly luminescent InP/ZnS/ZnS QDs. The QDs show a photoluminescence quantum yield as high as 78.5%. The emission can be tuned by adjusting the halide precursor and yellow emissive InP/ZnS/ZnS QDs are prepared by judiciously controlling the synthetic conditions. The yellow QDs show suppressed thermal quenching and retain >90% room temperature PL intensity at 150 °C for the growth solution. Additionally, the PL spectrum matches with the eye sensitivity function, resulting in efficient InP QD white light LEDs.

One-Pot Synthesis: Polymers, Hydrogel and Nanoparticles from Natural Extracted Green Materials

2019 ◽  
Author(s):  
sinoj Abraham ◽  
Ravichandran H. Kollarigowda
Keyword(s):  
Renewable Resources ◽  
Crosslinking Agent ◽  
Gel Permeation Chromatography ◽  
High Molecular Mass ◽  
Polymer Nanoparticles ◽  
One Pot ◽  
Emulsion Method ◽  
Green Materials ◽  
Gel Permeation

The development of green nanomaterials from renewable resources is the utmost importance in a context of sustainable development. In this work, we describe the preparation of green nanomaterials of polymer, nanoparticles and hydrogel that arise from the natural extraction of myrcene and ocimene using air/water as a catalyst in one pot. Interestingly, we noticed the polymerization of myrcene in situ condition with attaining high molecular mass and low polydispersity index. The explanation of the polymerization kinetics that were investigated through nuclear magnetic resonance (NMR) spectroscopy and gel permeation chromatography (GPC). Importantly, we elucidated the preparation of green hydrogel by using water as a crosslinking agent. Further, we also described green nanoparticle formation by using emulsion method. The nanoparticles that obtained were 130 ±10 nm in terms of size and were found to be monodispersed. With these novel ‘green nanomaterials’, we project that they will be beneficial to multiple nanotechnological applications.

Gelator In Situ Modify PMMA

2011 ◽  
Vol 130-134 ◽  
pp. 1528-1531
Author(s):  
Si Chen ◽  
Jian Ming Xu ◽  
Guo Dong Tang ◽  
Xu Wang
Keyword(s):  
Glass Transition ◽  
Transition Temperature ◽  
Mass Spectra ◽  
In Situ Polymerization ◽  
Gel Permeation Chromatography ◽  
Mechanical Analysis ◽  
Pure Pmma ◽  
H Nmr ◽  
Gel Permeation

Gelator (G2-C12-G2) was synthesized successfully, the structure of which was confirmed by1H-NMR and Mass spectra (MS). And G2-C12-G2was used to modify PMMA by “in-situ” polymerization. The results of gel permeation chromatography (GPC) showed that Mn and Mw/Mnof the PMMA composite were barely influenced by the incorporation of gel. The results of dynamic mechanical analysis (DMA) showed that the modified PMMA had higher modulus, toughness and glass transition temperature (Tg) than pure PMMA. Furthermore the results of spectrophotometer showed that the transparency of modified PMMA was nearly the same as pure PMMA .

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