Structural confirmation of polyurethane dendritic wedges and dendrimers using post source decay matrix-assisted laser desorption/ionization time-of-flight mass spectrometry

‘Post source decay’ analysis was utilized in structural confirmation of first, second and third generation polyurethane dendritic wedges as well as first generation porphyrin dendrimers. The samples were prepared by using α-cyano-4-hydroxycinnamic acid and acetone as the matrix and the solvent, respectively. The cleavages take place at both inner and outer layers of the dendritic compounds. Sodium ion adducts from the cleavage at the ester or amide bond (or a combination of both) are observed. The results obtained are in good agreement with the proposed structures of all analyzed compounds.