Ion-Based Liquid Crystals From Well-Defined Self-Organized Nanostructures to Applications

Ion-Based Liquid Crystals From Well-Defined Self-Organized Nanostructures to Applications 

College of Pharmaceutical Sciences, Ritsumeikan University, Kusatsu 525-8577, Japan e-mail maedahir ph.ritsumei.ac.jp 

Li (ed.). Nanoscience with Liquid Crystals, NanoScience and Technology, 

The boron-1,3-propanedione moiety between the two pyrrole rings of the dipyrrolyldiketone boron complexes is effective in affording suitable electronic states that exhibit UV/vis absorption and emission maxima in the visible region, as observed at 432 and 451 nm, respectively, in CH2CI2 for la [32]. Upon the addition of anions as tetrabutylammonium (TBA ) salts, interactions with the anions through the pyrrole NH and bridging CH can be identihed by NMR chemical shifts, as has been examined for a series of anion receptors. UV/vis 

In the solid state, a series of anion receptors may assemble in various assembling modes in the forms of receptor-anion complexes by combination with counter cations. jS-Unsubstituted lb afforded a planar [1 -1- l]-type pentacoordi-nated CF complex Ib CF that involved the pyrrole NH, the bridging CH, and phenyl ortho-CH units (Fig. 9.3a). Planar anion Ib CF stacked with tetrapropy-lammonium cations (TPA ) to form a charge-by-charge columnar structure with a Cl -Cl distance of 8.54 A, and a separation of 7.29 A between the Ib CF units 

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