Synthesis and properties of long and branched alkyl chain substituted perylenetetracarboxylic monoanhydride monoimides

N-Alkyl-3,4:9,10-perylenetetracarboxylic monoanhydride monoimides were prepared by the condensation of 3,4:9,10-perylenetetracarboxylic monoanhydride monopotassium salt with alkylamines (alkyl = decyl, lauryl, tetradecyl, cetyl, stearyl, etc.). N-Branched alkyl substituted perylenetetracarboxylic monoanhydride monoimides were prepared by the hydrolysis of N,N′-dialkyl-3,4:9,10-perylenebis(dicarboximide)s with potassium hydroxide. The absorption spectra of paint film, thermal stability and solubilities of these monoimides were investigated.