1,8-Bis(dimethylamino)naphthalene (“ProtonSponge”) and bromomaleic anhydride react quickly at room temperature, generating 3-(4,5-bis(dimethylamino)napthalen-1-yl)furan-2,5-dione (4-maleicanhydridoproton sponge or “MAPS”). MAPS is a deep purple solid that exhibits positive solvatochromism in solution. It is a weaker base than ProtonSponge. When protonated in solution, MAPS loses its color, but the
Maleic anhydride proton sponge as a novel MALDI matrix for the visualization of small molecules (<250 m/z) in brain tumors by routine MALDI ToF imaging mass spectrometry
作者:M. Giampà、M. B. Lissel、T. Patschkowski、J. Fuchser、V. H. Hans、O. Gembruch、H. Bednarz、K. Niehaus
DOI:10.1039/c6cc02387h
日期:——
A novel vacuum stable proton sponge, 4-maleicanhydridoproton sponge (MAPS), was prepared and applied as the matrix in Matrix-Assisted Laser Desorption/Ionization MassSpectrometryImaging (MALDI-MSI) of an aggressive brain tumor tissue...