Photoluminescence Properties of CdSe Nanocrystals from Water into Organic Phase Using 1‐Dodecylmercaptan as Phase Transfer Reagent

2006 ◽  
Vol 27 (1) ◽  
pp. 77-81 ◽  
Author(s):  
Jin Mu ◽  
Xubin Gao ◽  
Yunyan Zhang ◽  
Hua Sun ◽  
Lingyun Liu
Keyword(s):  
Organic Phase ◽  
Phase Transfer ◽  
Cdse Nanocrystals ◽  
Photoluminescence Properties

The structure and character of CdSe nanocrystals capped ZnO layer for phase transfer from hexane to ethanol solution

2005 ◽  
Vol 582 (1-3) ◽  
pp. 61-68 ◽  
Author(s):  
Guiye Shan ◽  
Xianggui Kong ◽  
Xin Wang ◽  
Yichun Liu
Keyword(s):  
Phase Transfer ◽  
Ethanol Solution ◽  
Cdse Nanocrystals

scholarly journals Synthesis by Reversed Phase Transfer Catalysis and Characterization of Naphthol AS-D Pigment

2013 ◽  
Vol 2013 ◽  
pp. 1-4
Author(s):  
Eleonora Cornelia Crasmareanu ◽  
Vasile Simulescu ◽  
Gheorghe Ilia
Keyword(s):  
Carboxylic Acid ◽  
Organic Phase ◽  
Reaction Rate ◽  
Phase Transfer Catalysis ◽  
Phase Transfer ◽  
Coupling Reaction ◽  
Reversed Phase ◽  
Azo Coupling ◽  
Unconventional Method

Reversed phase transfer catalysis (RPTC) was applied to synthesize the Naphthol AS-D pigment. This method consists in the transfer of the aryldiazonium cation 4-nitrobenzenediazonium from aqueous medium into the organic phase (nitrobenzene) in the form of a lipophilic ions pair by the catalyst used (perfluorooctyl potassium sulfonates). In the organic phase the azo-coupling reaction between 4-nitrobenzenediazonium chloride and 3-hydroxy-2-carboxylic acid 2-methyl-anilide (Naphthol AS-D) takes place as coupling component. Using this unconventional method of synthesis, an increase of the reaction rate, combined with a higher purity of the product, was obtained.

Colloidal Synthesis of CdSe Nanocrystals: Preparation, Characterization in Different Organic Solvent

2020 ◽  
Vol 29 ◽  
pp. 1-7
Author(s):  
Akeel M. Kadim
Keyword(s):  
Quantum Dots ◽  
Oleic Acid ◽  
Organic Solvent ◽  
Industrial Development ◽  
Phase Transfer ◽  
Energy Difference ◽  
Colloidal Synthesis ◽  
Cdse Nanocrystals ◽  
Solution Technique ◽  
White Light Generation

Colloidal CdSe Nanocrystals (NCs) or quantum dots (QDs) have been developed using a yielding solution technique utilizing chemical reactions in chloroform and oleic acid in different organic solvents. This assembly is an improvement of the systematic thermal decomposition of high temperature organic solvent compounds. CdSe NCs of specific sizes can be produced easily by adjusting the solvent. This technique is reproducible and clear, so industrial development can be easily scaled up. Characterization at room temperature of the UV-Vis absorption and Photoluminescence (PL) spectra. Results reveal that the CdSe prepared with the creation of defects was nanocrystalline. The energy difference (Eg) measured in PL was 2.3 and 2.69 eV respectively for CdSe NCs in chloroform and oleic acid. The structures of the CdSe quantum dots were determined by scanning electron microscopy (SEM). The phase-transfer of chloroform and oleic acid stabilized CdSe nanocrystals solutions was studied for their potentials in white light generation applications.

Reversible Phase Transfer of Carbon Dots between an Organic Phase and Aqueous Solution Triggered by CO2

2018 ◽  
Vol 57 (14) ◽  
pp. 3687-3691 ◽  
Author(s):  
Xiaoyan Pei ◽  
Dazhen Xiong ◽  
Huiyong Wang ◽  
Shuaiqi Gao ◽  
Xinying Zhang ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Organic Phase ◽  
Carbon Dots ◽  
Phase Transfer ◽  
Reversible Phase
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