Fluorescent Guest Molecules Report Ordered Inner Phase of Host Capsules in Solution

Despite recent strides in the synthesis of elaborate nanometer-scale molecular hosts, the internal structure of these self-assembled cages remains ill characterized. We used fluorescent probe molecules, pyrene butyric acid (PBA), as guests in C-hexylpyrogallol[4]arene capsules to relay information a...

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Published inScience (American Association for the Advancement of Science) Vol. 309; no. 5743; pp. 2037 - 2039
Main Authors Dalgarno, Scott J, Tucker, Sheryl A, Bassil, Daniel B, Atwood, Jerry L
Format Journal Article
LanguageEnglish
Published Washington, DC American Association for the Advancement of Science 23.09.2005
The American Association for the Advancement of Science
Subjects
Absorption spectra
Analysis
Capsules
Centroids
Chemistry
Crystallography
Emission spectra
Exact sciences and technology
Fluorescence
General and physical chemistry
Hexanes
Inhalants
Molecular structure
Molecules
Solution properties
Solutions
Solvents
Wavelengths
Encapsulation
Self assembly
Nanometer scale
Molecules
Chemical solution
Arene
Cage compound
Carboxylic acid
Internal structure
Capsule
Fluorescent compound
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Summary:Despite recent strides in the synthesis of elaborate nanometer-scale molecular hosts, the internal structure of these self-assembled cages remains ill characterized. We used fluorescent probe molecules, pyrene butyric acid (PBA), as guests in C-hexylpyrogallol[4]arene capsules to relay information about the chemical environment on the interior of the assemblies. Spectroscopic and single-crystal x-ray diffraction studies show that, in both solution and the solid state, the host can encapsulate two PBA guests and keep them well separated through specific interactions with the capsule walls.
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ISSN:0036-8075
1095-9203
DOI:10.1126/science.1116579