Electron ionization mass spectra of naphthoxazine, naphthpyrrolo-oxazinone and naphthoxazinobenzoxazine derivatives

Abstract

Some naphthoxazinobenzoxazines (1a, 1b, 2a−2d, 3a, 3b), naphthoxazines (4a, 4b, 5, 6a, 6b) and naphthpyrrolo-oxazinones (7, 8a, 8b) were studied using mass spectrometry to find out regioisomeric effects and the effects of substituents. As expected the spectra of regioisomeric pairs 1a−3a vs 1b−3b were very different.

Polynaphthoxazine-based 1D carbon nano-materials: electrospun fabrication, characterization and electrochemical properties

“…The nitrogen functionalities may maximize the electroactive surface area within a carbon matrix, enhancing the wettability and the electrochemical performance. [48][49][50][51][52][53] On the other hand, the incorporation of an acrylate polymer segment is expected to overcome the electrospinnability limitation associated with low-molecular weight polynaphthoxazine, and to generate a porous structure in the carbon matrix. 54,55 By controlling the phase separation of the PNEM/ PMMA polymer blend in a mixed solvent, for the first time we were able to fabricate continuous core/shell fibres with an ultrafine PNEM nanofibre core and a PMMA shell, which can subsequently be cured/carbonized to form short carbon nanofibres.…”