Steady-state and time-resolved fluorescence have been
used to study the gelation of sodium deoxycholate
at pH values close to neutrality. Pyrene was used as a probe.
The results suggest the formation of pyrene
excimer as a result of the aggregation process: when two clusters
carrying probes form a larger one, pyrene
molecules can interact in both the ground and excited states.
Fluorescence lifetimes for monomer and
excimer pyrene are given and favorably compared to similar systems.
A structure for the aggregates is
also suggested.
Als mathematischer Cayley‐Baum kann das strukturelle Motiv der supramolekularen Struktur interpretiert werden, die bei der Selbstanordnung des in der menschlichen Galle vorkommenden Salzes Natriumdesoxycholat (NaDC) mit dem trimeren β‐Cyclodextrin T entsteht (siehe Bild). Dies ist das erste Beispiel für dendritisches Wachstum eines Cyclodextrinkomplexes.
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