scholarly journals Photopolymerization of Methyl Methacrylate with N-Cetylpyridinium Chloride–KSCN–CCl4 in Aqueous System

1995 ◽  
Vol 27 (10) ◽  
pp. 1044-1047 ◽  
Author(s):  
Shozo Shimada ◽  
Kenzo Tabuchi ◽  
Masahiro Tsunooka
Keyword(s):  
Methyl Methacrylate ◽  
Cetylpyridinium Chloride ◽  
Aqueous System

Polymerization of methyl methacrylate catalyzed by macromolecule–copper (II) complex in sodium sulfite aqueous system

2007 ◽  
Vol 104 (2) ◽  
pp. 1285-1290 ◽  
Author(s):  
Xu Qing-Feng ◽  
Lu Jian-Mei ◽  
Xia Xue-Wei ◽  
Xiao Meng ◽  
Wang Li-Hua
Keyword(s):  
Methyl Methacrylate ◽  
Sodium Sulfite ◽  
Aqueous System

scholarly journals Oil-Dispersible Green-Emitting Carbon Dots: New Insights on a Facile and Efficient Synthesis

Materials ◽  
2020 ◽  
Vol 13 (17) ◽  
pp. 3716
Author(s):  
Gianluca Minervini ◽  
Annamaria Panniello ◽  
Elisabetta Fanizza ◽  
Angela Agostiano ◽  
Maria Lucia Curri ◽  
...  
Keyword(s):  
Carbon Dots ◽  
Room Temperature ◽  
Cetylpyridinium Chloride ◽  
Cost Effective ◽  
Aqueous System ◽  
Synthetic Approach ◽  
One Pot ◽  
Light Emitting Devices ◽  
Water Dispersible ◽  
Reliable Mechanism

Carbon dots (CDs) have been progressively attracting interest as novel environmentally friendly and cost-effective luminescent nanoparticles, for implementation in light-emitting devices, solar cells, photocatalytic devices and biosensors. Here, starting from a cost-effective bottom-up synthetic approach, based on a suitable amphiphilic molecule as carbon precursor, namely cetylpyridinium chloride (CPC), green-emitting CDs have been prepared at room temperature, upon treatment of CPC with concentrated NaOH solutions. The investigated method allows the obtaining, in one-pot, of both water-dispersible (W-CDs) and oil-dispersible green-emitting CDs (O-CDs). The study provides original insights into the chemical reactions involved in the process of the carbonization of CPC, proposing a reliable mechanism for the formation of the O-CDs in an aqueous system. The ability to discriminate the contribution of different species, including molecular fluorophores, allows one to properly single out the O-CDs emission. In addition, a mild heating of the reaction mixture, at 70 °C, has demonstrated the ability to dramatically decrease the very long reaction time (i.e. from tens of hours to days) at room temperature, allowing us to synthesize O-CDs in a few tens of minutes while preserving their morphological and optical properties.

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