Source:http://linkedlifedata.com/resource/pubmed/id/18205238
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rdf:type | |
lifeskim:mentions | |
pubmed:issue |
6
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pubmed:dateCreated |
2008-6-2
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pubmed:abstractText |
The solutions of four meso-tetrakis(N-alkylpyridinium-4-yl)porphyrin salts and of the p-toluenesulfonate salt of meso-tetrakis(4-trimethylammoniumphenyl)porphyrin, in methanol, were studied by electrospray mass spectrometry, in order to investigate the influence of the type of counter ion, the length of the substituent N-alkyl groups of the four (N-alkylpyridinium-4-yl)porphyrins and the presence of an aromatic (alkylpyridinium) or aliphatic (trimethylammonium) nitrogen, in ion formation. In our experimental conditions, adducts with the counter ions were formed only for the meso-tetrakis(4-trimethylammoniumphenyl)porphyrin and were not observed for the other porphyrins, even when the counter ion was the same. In contrast, formation of reduced species, such as the [M(4+) + e(-)]3+, [M(4+) + 2e(-)]2+, [M(4+) + 4e(-) + 2H(+)]2+, and [M(4+) + 5e(-) + 2H(+)]+ ions was observed only for the (N-alkylpyridinium-4-yl)porphyrins and the appearance of these species is apparently solvent related and may occur via counter ion/solvent adducts.
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pubmed:language |
eng
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pubmed:journal | |
pubmed:citationSubset |
IM
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pubmed:chemical |
http://linkedlifedata.com/resource/pubmed/chemical/Cations,
http://linkedlifedata.com/resource/pubmed/chemical/Methanol,
http://linkedlifedata.com/resource/pubmed/chemical/Porphyrins,
http://linkedlifedata.com/resource/pubmed/chemical/Pyridinium Compounds,
http://linkedlifedata.com/resource/pubmed/chemical/Quaternary Ammonium Compounds
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pubmed:status |
MEDLINE
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pubmed:month |
Jun
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pubmed:issn |
1076-5174
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pubmed:author | |
pubmed:issnType |
Print
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pubmed:volume |
43
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pubmed:owner |
NLM
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pubmed:authorsComplete |
Y
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pubmed:pagination |
806-13
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pubmed:dateRevised |
2009-11-3
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pubmed:meshHeading | |
pubmed:year |
2008
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pubmed:articleTitle |
Reduction and adduct formation from electrosprayed solutions of porphyrin salts.
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pubmed:affiliation |
Mass Spectrometry Laboratory, Department of Chemistry, University of Aveiro, Campus de Santiago, 3810-193 Aveiro, Portugal.
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pubmed:publicationType |
Journal Article
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