What question did this study set out to answer?

To synthesize and characterize crystalline inclusion complexes formed between poly(dimethylsilane)s of varying molecular weights and cyclodextrins.

August 1, 2003Macromolecules

Preparation and Characterization of the Inclusion Complexes of Poly(dimethylsilane)s with Cyclodextrins

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Authors

HOHiromichi OkumuraThe University of Osaka YKYoshinori KawaguchiDaiichi Sankyo (United States)AHAkira HaradaKanazawa University

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Implication

Structural analysis demonstrates chain-length-selective inclusion of poly(dimethylsilane)s by cyclodextrins, revealing channel-type complexes with extended all-trans silicon chains.

Key Points

To synthesize and characterize crystalline inclusion complexes formed between poly(dimethylsilane)s of varying molecular weights and cyclodextrins.
Mixed poly(dimethylsilane)s across a range of molecular weights with alpha-, beta-, and gamma-cyclodextrins to generate crystalline inclusion complexes.
Characterized isolated complexes using 1H NMR, 13C CP/MAS NMR, and X-ray diffraction to evaluate stoichiometry and channel architecture.
Investigated polymer backbone conformations and photophysical behaviors using ultraviolet absorption and fluorescence spectroscopy.
Beta- and gamma-cyclodextrins formed crystalline inclusion complexes with poly(dimethylsilane)s, whereas alpha-cyclodextrin formed no complexes at any molecular weight.
Inclusion yields for beta-cyclodextrin decreased monotonically with increasing polymer molecular weight, while gamma-cyclodextrin yields peaked at a molecular weight around 760 before declining.
Gamma-cyclodextrin complexes assembled into a 1:3 host-to-monomer stoichiometry in channel-type arrangements that enforced an all-trans conformation on the silicon backbone.

Cite This Study

Okumura et al. (2003) studied this question.

synapsesocial.com/papers/6a92970a9da65ccb784a0c5f https://doi.org/10.1021/ma030164a

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Implication

Structural analysis demonstrates chain-length-selective inclusion of poly(dimethylsilane)s by cyclodextrins, revealing channel-type complexes with extended all-trans silicon chains.

Preparation and Characterization of the Inclusion Complexes of Poly(dimethylsilane)s with Cyclodextrins

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Implication

Key Points

Cite This Study

Preparation and Characterization of the Inclusion Complexes of Poly(dimethylsilane)s with Cyclodextrins

Discussion

Member takes

Implication

Key Points

Cite This Study

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