Aggregating tendencies of some N-alkylcarbazoles

Aggregation of some nitrogen-containing heterocyclic compounds have been in vestigated by means of fluorescence spectroscopy in aqueous or aquiorgano b inary mixtures of different Phi values for the first time. The aggregators studied are N-butylcarbazole (CBZ-4), N-octylcarbazole (CBZ-8), N-dodecylca rbazole (CBZ-12), and N-hexadecylcarbazole (CBZ-16). Their aggregating tend encies have been evaluated by measuring their critical aggregate concentrat ion values (CAgC's). Our results indicate that the N-alkylcarbazoles, just like the anthracene derivatives with different chain-lengths, can also be u sed as fluorescence probes for evaluating aggregating tendencies or CAgC va lues.