✦ LIBER ✦

Beam-induced reaction betweenmeta-nitrobenzyl alcohol and dipyridocyanine dyes in liquid-secondary-ion mass spectrometry

✍ Scribed by Sharon W. Lemire; Xiaodong Zhao; Laren M. Tolbert; Kenneth L. Busch

Book ID: 103995818
Publisher: Elsevier Science
Year: 1994
Tongue: English
Weight: 353 KB
Volume: 5
Category: Article
ISSN: 1044-0305
DOI: 10.1016/1044-0305(94)80020-0

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✦ Synopsis

Analyses of cationic dipyridocyanine dyes by liquid-secondary-ion mass spectrometry in a liquid matrix of meta-nitrobenzyl alcohol (rnNBA) provide evidence for beam-induced addition reactions between the sample molecule (C) and the mNBA solvent. The ionic products of these addition reactions formally correspond to C+mNBA-O2, Ic+mNBA-O2-H](+), and C+mNBA-O2-2H. Initial loss of H from the adduct ion extends the conjugation of the adduct into the mNBA ring structure, whereas the final loss of hydrogen is thought to be promulgated by the formation of a benzylic radical stabilized through resonance with the π-electron system of the nitrobenzyl alcohol. Alternatively, two hydrogens may be lost from the alcohol functionality to form an aldehyde.

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