Citation: . STRUCTURAL INVESTIGATION OF A NEW POLYORGANOSILOXANE CONTAINING NANOTUBULAR CAVITIES USING ORGANIC FLUORESCENT PROBES*[J]. Chinese Journal of Polymer Science, ;1999, 17(4): 383-389. shu

STRUCTURAL INVESTIGATION OF A NEW POLYORGANOSILOXANE CONTAINING NANOTUBULAR CAVITIES USING ORGANIC FLUORESCENT PROBES*

Received Date: 10 September 1998

Fluorescent molecules - p-dimethylaminobenzonitrile (DMABN) and trans-stilbene (TSB) -were used as probes to investigate the inner structure of the nanotubular cavities contained in a newpolyorganosiloxane (POS) which was prepared by the hydrosilylation coupling reaction of cis-isotacticladderlike polyvinylsilsesquioxane (Vi-T) with 1, 1,3,3-tetramethyldisiloxane (H-MM) as coupling agent inthe presence of catalyst dicyclopentadienyldichloroplatin (Cp2PtCl2). The results from FTIR spectra and fluorescence spectra in combination with molecular simulation reveal that the cross-section of the nanotubular cavity is nearly rectangular in shape,and is about 0.62 nm in width and about 0.38 nm in height.This work gains in-depth knowledge into the inner structure of the nanotubular cavities of POS and furthermore provides a guide to the selection of proper guest molecules in constructing functional supramolecular clathrate based upon POS.
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