Poly chiral aggregates

Poly alkyl(afkoxyphenyl)silane Chiral Aggregates... 

Poly[(alkyl)alkoxyphenylsilylene]s, chiral aggregate studies, 3, 627... 

A stilbene-cored poly(glutamate) dendrimer in benzene underwent intermolecular photochemical [2 + 2] cycloaddition. The bisignate circular dichroism signal of the resulting cycloadduct indicated the formation of chiral aggregates with through-space electronic interactions between the two stilbene cores. 

Irradiation of stilbene-cored poly(glutamate)dendrimer (254), (255), and (256) afforded the corresponding [2 + 2] cycloadducts in benzene and a bisignate circular dichroism signal was observed, indicating the chiral aggregation of the stilbene core (Scheme 56). ... 

Figure 4.28 Plot of CD intensities of poly -hexyl(j -/ -propoxyphenyl)silane (41) aggregates in toluene/series of (S)-primary chiral alkyl alcohols/methanol mixtures at 20°C. [For comparison, CD intensity with (A)-2-butanol is inserted.].

ZB Zhang, M Fujiki, M Motonaga, and CE McKenna, Control of chiral ordering in aggregated poly 3-(S)-[2-methylbutyl]thiophene by a doping-dedoping process, J. Am. Chem. Soc., 125 7878-7881, 2003. 

In order to further experimentally probe the hard-core model of polysilane aggregate chirality, a series of poly-[(alkyl)alkylphenylsilylene]s, differing in phenyl ring-substituent position and chain length were synthesized, designed such that the polymer chain diameter, d, and helical pitch, p, in the hard-core model were varied.343... 

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