Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1237351 | Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy | 2009 | 6 Pages |
Abstract
The quaterisation process of 1,2-dibromoethane and pyridine is in situ traced by electronic absorption spectrum. Two absorption peaks, induced by mono- and bis-pyridinium salt of 1,2-dibromoethane, appear at 429 nm and 313 nm, respectively. To explain the phenomena, several kinds of alkyl bromides with special structures were selected and compared by experimental measurement and theoretical calculation. The results indicate that for mono-pyridinium salt of 1,2-dibromoethane, the electron donor property of ortho-bromine group increases the electron cloud density of the carbon atom associated with pyridinium cation, which induces red-shift of absorption wavelength.
Related Topics
Physical Sciences and Engineering
Chemistry
Analytical Chemistry
Authors
Jin-Ling Song, Li-Ming Gong, Shou-Ai Feng, Jiang-Hong Zhao, Jian-Feng Zheng, Zhen-Ping Zhu,