Please use this identifier to cite or link to this item:
|Title:||Protonation of leucoemeraldine in the solid state and in solution|
|Authors:||Neoh, K.G. |
|Citation:||Neoh, K.G., Kang, E.T., Tan, K.L. (1993). Protonation of leucoemeraldine in the solid state and in solution. Journal of Polymer Science, Part B: Polymer Physics 31 (4) : 395-401. ScholarBank@NUS Repository. https://doi.org/10.1002/polb.1993.090310403|
|Abstract:||The protonation of leucoemeraldine in powder form and in N-methylpyrrolidinone (NMP) solution by HClO4 and HBF4 has been studied by x-ray photoelectron spectroscopy (XPS), infrared (IR), and ultraviolet (UV)-visible absorption spectroscopy. In powder form, less than 25% of the amine nitrogens can be protonated in the absence of oxygen. The effects of oxygen on the degree of protonation and the distribution of amine and imine units upon deprotonation of the salt are investigated. The degree of protonation in leucoemeraldine can be increased to about 50% with 3 M HClO4, similar to that achievable with emeraldine base in powder form. In NMP solution, leucoemeraldine is easily oxidized by dissolved oxygen. Protonation of both leucoemeraldine and emeraldine base in NMP solutions results in metastable species which gradually undergo deprotonation. The resulting products are affected by the O2 content of the solutions.|
|Source Title:||Journal of Polymer Science, Part B: Polymer Physics|
|Appears in Collections:||Staff Publications|
Show full item record
Files in This Item:
There are no files associated with this item.
checked on Sep 19, 2018
WEB OF SCIENCETM
checked on Sep 5, 2018
checked on Jun 14, 2018
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.