Molecular switches photoresponsive

Shinkai, S. (2001) Switchable molecular receptors and recognition processes from photoresponsive crown ethers to allosteric sugar sensing systems, in Feringa, B.L. (ed.), Molecular Switches, Wiley-VCH, Weinheim, Germany, pp. 281-307. [Pg.12]

Li et al. reported two light-driven chiral molecular switches 36 and 37 with tetrahedral and axial chirality [116]. When chiral switch 36 was doped in nematic LC host E31 at 15 wt% concentration, phototuning the reflection color over the entire visible region was observed. An amazing feature of this photoresponsive CLC system is the quick relaxation. After 1 min of exposure to bright white light, it returned to... [Pg.171]

Using these novel LB films, systematic studies have been carried out to elucidate which features of the molecular structures of azo chromophores govern the photoinduced switching of the liquid-crystal alignment.165-169 The effects of spacer length (n) and tail length (m + 1) on the photoresponse of liquid-crystal... [Pg.46]

It is important to point out that molecular cooperative motion allows for a significant amplification in the response of azobenzene-based LC dopants. It is possible in PLCP systems containing even a small amount of photoresponsive moieties to show reversible switching and optical control. This behavior extends to photoinduced phase transition in copolymer or LCP blend (guest-host). As shown in Figure 7.5, when a... [Pg.237]

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