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The Partner Does Matter: The Structure of Heteroaggregates of Acridine Orange in Water.

ABSTRACT: Self-assembly of organic molecules in aqueous solutions is governed by a delicate entropy/enthalpy balance. Even small changes in their intermolecular interactions can cause critical changes in the structure of the aggregates and their spectral properties. The experimental results reported here demonstrate that protonated cations of acridine orange, acridine, and acridin-9-amine form stable J-heteroaggregates when in water. The structures of these aggregates are justified by the homonuclear ¹H cross-relaxation nuclear magnetic resonance (NMR). The absorption and fluorescence of these aggregates deviate characteristically from the known H-homoaggregates of the protonated cations of acridine orange. The latter makes acridine orange a handy optical sensor for soft matter studies.

SUBMITTER: Shenderovich IG

PROVIDER: S-EPMC6696166 | biostudies-literature | 2019 Aug

REPOSITORIES: biostudies-literature

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The Partner Does Matter: The Structure of Heteroaggregates of Acridine Orange in Water.

Shenderovich Ilya G IG

Molecules (Basel, Switzerland) 20190802 15

Self-assembly of organic molecules in aqueous solutions is governed by a delicate entropy/enthalpy balance. Even small changes in their intermolecular interactions can cause critical changes in the structure of the aggregates and their spectral properties. The experimental results reported here demonstrate that protonated cations of acridine orange, acridine, and acridin-9-amine form stable J-heteroaggregates when in water. The structures of these aggregates are justified by the homonuclear <sup ...[more]

PMID: 31382361

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