✦ LIBER ✦

Matrix-assisted laser desorption/ionization collision-induced dissociation of linear single oligomers of nylon-6

✍ Scribed by Renata Murgasova; David M. Hercules

Publisher: John Wiley and Sons
Year: 2001
Tongue: English
Weight: 227 KB
Volume: 36
Category: Article
ISSN: 1076-5174
DOI: 10.1002/jms.211

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

Matrix‐assisted laser desorption/ionization, collision induced‐dissociation (MALDI‐CID) has been used to obtain structural information for linear single oligomers of nylon‐6. The effects of matrix and cationization agent in MALDI‐CID analysis have been investigated. Fragmentation mechanisms are proposed for the series of ions that are observed in the MALDI‐CID spectra of the hexamer, octamer and dodecamer. Fragmentation processes observed in the MALDI‐CID spectra include cleavage of the end groups followed by dissociation of the m/z 113 unit. Cleavage of the oligamide chain occurs at the amide linkage, as well as at adjacent bonds. For the four matrices and three cationization agents investigated, 2,5‐dihydroxybenzoic acid and sodium chloride showed the best performance for MALDI‐CID analysis of the dodecamer. In addition, yields of the fragment ions in MALDI‐CID spectra were found to be dependent on the chain length distribution. Copyright © 2001 John Wiley & Sons, Ltd.

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