Submerged liquid plasma for the synthesis of unconventional nitrogen polymers.
Glow discharge polymerization is not well understood due to the rapid/complex reaction at the plasma/gas precursor interface. Plasma reaction in a submerged condition allows post-plasma-polymerization, leading to further polymer growth and thus a stable structure. Electron collision with acetonitrile at the interface initiates the formation of radical monomers, which undergoes further rearrangement to form low-molecular (LM) nitrogen polymers (NPs). The radical-rich LM NPs go through further polymerization, forming stable high-molecular (HM) NPs (as determined using liquid chromatography/mass spectrometry). LM NPs absorb light at a wavelength of 270 nm (λ max) whereas HM NPs show absorption at 420 nm (λ max), as determined from ultraviolet-visible absorption spectra. The fluorescence spectra of HM NPs show characteristic emission at 430 nm, which indicates the presence of nitrogen functional groups with external conjugation. The proposed structure of HM NPs is verified with different analytical instruments.
Promotion Centre for Global Materials Research, Department of Material Science and Engineering, National Cheng Kung University, Tainan, Taiwan.
Jaganathan
J
Senthilnathan
Chih-Chiang
CC
Weng
Jiunn-Der
JD
Liao
Masahiro
M
Yoshimura
D008422:Materials Testing; D017672:Nitrogen Compounds / Q000138:chemical synthesis*; D058626:Plasma Gases / Q000737:chemistry*; D011108:Polymers / Q000138:chemical synthesis*
D017672:Nitrogen Compounds; D058626:Plasma Gases; D011108:Polymers