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LIGHT DRIVEN TRANSPORT OF BILIRUBIN THROUGH A BULK LIQUID MEMBRANE

Abstract— Hexadecyltrimethylammonium bromide was used as a carrier in a bulk liquid membrane to construct a model system for the rapid excretion of bilirubin during phototherapy of jaundice. When bilirubin in the donor phase was irradiated its transport through the bulk membrane increased by about two orders of magnitude compared to the dark. As production of the photodiastereomers of bilirubin and their thermal reversion are fast processes compared to the carrier mediated transport, active transport against a bilirubin concentration gradient driven by the photoisomerisation reaction is observed. The kinetics of this novel transport system is discussed and approximated by a recursion algorithm.