Synthesis and characterization of mono- and dicarboxyalkyloxacarbocyanines

Several novel asymmetric N-carboxyalkyl-N′-alkyloxacarbocyanines and symmetric N,N′-dicarboxyalkyloxacarbocyanines have been synthesized and characterized using 1H and 13C NMR, FTIR and Visible spectroscopy and HR-FAB-MS.