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Formation of Spherulitic J‑Aggregates from the Coassembly of Lithocholic Acid and Cyanine Dye
journal contribution
posted on 2017-09-05, 00:00 authored by Samuel Rhodes, Wenlang Liang, Ekaterina Shteinberg, Jiyu FangSupramolecular aggregates
of organic dyes through noncovalent interactions
have attracted great interest because they exhibit collective optical
and excitonic properties. We report the formation of spherulitic J-aggregates
from the coassembly of lithocholic acid (LCA) and 3,3′-diethylthiacarbocyanine
iodide (DiSC2(3)) in ammonia solution. Each spherulite
contains a core, which serves as a nucleus for the growth of radially
oriented J-aggregate fibrils. We find that the growth of spherulitic
J-aggregates exhibits a sigmoidal kinetic curve with an initial lag
time, followed by a period of rapid growth and a finally slow approach
to equilibrium.