Photoacoustic and luminescence characterization of nitrogen heterocyclic aromatic UV-MALDI matrices in solution

GABRIELA PETROSELLI,; PEDRO D GARA; GABRIEL M. BILMES; ERRA BALSELLS, ROSA

Photochemical and Photobiological Sciences

ROYAL SOC CHEMISTRY

Lugar: CAMBRIDGE; Año: 2012 vol. 11 p. 1062 - 1068

1474-905X

Abstract A group of nitrogen heterocyclic aromatic compounds recently introduced as UV-MALDI matrices was studied. By using spectroscopic, luminescence and photoacoustic techniques, as well as time resolved phosphorescence for singlet oxygen production determination, the behaviour of 9-aminoacridine (9AA), 3-aminoquinoline (3AQ), 2-(2-aminoethylamino)-5-nitropyridine (AAN) and 3,4-dihydro-7-methoxy-1-methyl-9H-pyrido[3,4b] indole (harmaline, HLA) in acetonitrile solutions is described. The results show that one important factor to take into account in the efficiency of UV-MALDI matrices is the deactivation pathways, particularly the radiationless process.