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Simultaneous SAXS and SANS Analysis for the Detection of Toroidal Supramolecular Polymers Composed of Noncovalent Supermacrocycles in Solution.

Hollamby, MJ; Aratsu, K; Pauw, BR; Rogers, SE; Smith, AJ; Yamauchi, M; Lin, X; Yagai, S

Simultaneous SAXS and SANS Analysis for the Detection of Toroidal Supramolecular Polymers Composed of Noncovalent Supermacrocycles in Solution. Thumbnail


Authors

K Aratsu

BR Pauw

SE Rogers

AJ Smith

M Yamauchi

X Lin

S Yagai



Abstract

Molecular self-assembly primarily occurs in solution. To better understand this process, techniques capable of probing the solvated state are consequently required. Small-angle scattering (SAS) has a proven ability to detect and characterize solutions, but it is rarely applied to more complex assembly shapes. Here, small-angle X-ray and neutron scattering are applied to observe toroidal assemblies in solution. Combined analysis confirms that the toroids have a core-shell structure, with a p-conjugated core and an alkyl shell into which solvent penetrates. The dimensions determined by SAS agree well with those obtained by (dried-state) atomic force microscopy. Increasing the number of naphthalene units in the molecular building block yields greater rigidity, as evidenced by a larger toroid and a reduction in solvent penetration into the shell. The detailed structural analysis demonstrates the applicability of SAS to monitor complex solution-based self-assembly.

Journal Article Type Article
Acceptance Date May 13, 2016
Publication Date Jul 7, 2016
Publicly Available Date Mar 29, 2024
Journal Angew Chem Int Ed Engl
Print ISSN 1433-7851
Publisher Wiley
Peer Reviewed Peer Reviewed
Volume 128
Issue 34
Pages 9890 - 9893
DOI https://doi.org/10.1002/ange.201603370
Keywords nanorings, toroids, self-assembly, small-angle scattering, supramolecular chemistry
Publisher URL http://onlinelibrary.wiley.com/doi/10.1002/ange.201603370/abstract;jsessionid=837A2302AD887F80675E6E9D59CB9199.f01t01

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