157202-56-7Relevant academic research and scientific papers
Macroscopic origin of circular dichroism effects by alignment of self-assembled fibers in solution
Wolffs, Martin,George, Subi J.,Tomovic, Zeljko,Meskers, Stefan C. J.,Schenning, Albertus P. H. J.,Meijer
, p. 8203 - 8205 (2008/09/18)
All lined up: Supramolecular assemblies are aligned by a convective flow in clear, nonviscous dilute solutions (see picture). The linear dichroism created by the alignment results in artifacts in circular dichroism measurements, the origins of which are explained. (Figure Presented).
Helicity induction and amplification in an oligo(p-phenylenevinylene) assembly through hydrogen-bonded chiral acids
George, Subi J.,Tomovic, Zeljko,Smulders, Maarten M. J.,De Greef, Tom F. A.,Leclere, Philippe E. L. G.,Meijer,Schenning, Albertus P. H. J.
, p. 8206 - 8211 (2008/09/18)
(Figure Presented) Regulating the twist: Tunable supramolecular chirality is induced in an achiral helical self-assembly (P, M; see picture) by hydrogen-bonded chiral guest molecules (yellow and purple rods). Chiroptical probing of the π-conjugated chromo
2,5-Dialkoxy Substituted Oligo- and Poly(1,4-phenyleneethenylene)s
Kretzschmann, H.,Meier, H.
, p. 247 - 254 (2007/10/02)
O-Alkylation and regioselective Rieche formylation of 2-methylhydroquinone (1) yields the 2,5-dialkoxy-4-methylbenzaldehydes 4a-j.The corresponding azomethines 5a-j enter in a strongly alkaline medium a selfcondensation reaction leading to the title compounds 6/7a-j.These conjugated oligomers and polymers possess highly regular structures with exclusively (E)-configurated double bonds.GPC, IR, 1H-, 13C-NMR and MS-FD measurements were used for their characterization.Somewhat different results were obtained for the similarly prepared Schiff base 5l which contains chlorine substituents in the side chains.Cleavage of hydrogen chloride leads not only to unsaturated alkoxy groups; additionally, cyclization reactions (5l8l) are observed.
