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It was found that the addition of a surfactant (SDS, sodium dodecyl sulfate) led to conformational changes of a cationic water-soluble polysilane bearing a trimethylammonium group in the side substituent (APS) which we have recently developed. The spectroscopic observations indicated the extension of the APS conformation in the presence of SDS in water in contradiction to the expectation that the charge neutralization induce a more compact conformation of the polymer.
