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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Watanabe, Takehiro Kawasaki, Hideya Kimoto, Takashi Arakawa, Ryuichi |
| Description | Country affiliation: Japan Author Affiliation: Watanabe T ( Department of Applied Chemistry, Kansai University, Suita, Osaka 564-8680, Japan.) |
| Abstract | Halohydrination of epoxy resins using sodium halides as cationizing agents in matrix-assisted laser desorption/ionization (MALDI) and desorption ionization on porous silicon mass spectrometry (DIOS-MS) were investigated. Different mass spectra were observed when $NaClO_{4}$ and NaI were used as the cationizing agents at the highest concentration of 10.0 mM, which is much higher than that normally used in MALDI-MS. MALDI mass spectra of epoxy resins using NaI revealed iodohydrination to occur as epoxy functions of the polymers. The halohydrination also occurred using NaBr, but not NaCl, due to the differences in their nucleophilicities. On the basis of the results of experiments using deuterated $CD_{3}OD$ as the solvent, the hydrogen atom source was probably ambient water or residual solvent, rather than being derived from matrices. Halohydrination also occurred with DIOS-MS in which no organic matrix was used; in addition, reduction of epoxy functions was observed with DIOS. NaI is a useful cationizing agent for changing the chemical form of epoxy resins due to iodohydrination and, thus, for identifying the presence of epoxy functions. Copyright © 2008 John Wiley & Sons, Ltd. |
| File Format | HTM / HTML |
| ISSN | 10765174 |
| Issue Number | 12 |
| Journal | Journal of Mass Spectrometry |
| Volume Number | 43 |
| e-ISSN | 10969888 |
| Language | English |
| Publisher | Wiley |
| Publisher Date | 2008-12-01 |
| Publisher Place | Great Britain (UK) |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Discipline Spectroscopy Discipline Chemistry Techniques |
| Content Type | Text |
| Resource Type | Article |
| Subject | Spectroscopy Medicine |
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