Effects of auxiliary ligands of Pd(II) dimers on induction of chiral nematic phases: chirality inversion and the photo-responsive structural change
Tamura, K; Yoshida, J; Taniguchi, M; Kitazawa, T; Yamagishi, A; Sato, H
HERO ID
2902256
Reference Type
Journal Article
Year
2015
Language
English
PMID
| HERO ID | 2902256 |
|---|---|
| In Press | No |
| Year | 2015 |
| Title | Effects of auxiliary ligands of Pd(II) dimers on induction of chiral nematic phases: chirality inversion and the photo-responsive structural change |
| Authors | Tamura, K; Yoshida, J; Taniguchi, M; Kitazawa, T; Yamagishi, A; Sato, H |
| Journal | Dalton Transactions (Online) |
| Volume | 44 |
| Issue | 7 |
| Page Numbers | 3209-3215 |
| Abstract | Dinuclear square planar palladium(ii) complexes, [{Pd(ii)La}2(baet)] (La(-) = β-diketonato and baet(2-) = 1,2-diacetyl-1,2-bis(3-methylbutanoyl)ethanato), were prepared and used as chiral dopants to induce chiral nematic phases. The following β-diketones were used as LaH: pentane-2,4-dione (acacH), dibenzoylmethane (dbmH), di-4-nonyloxybenzoylmethane (C9-dbmH) and 3-[4'-(4''-(octyloxy)phenylazo)phenyl]-2,4-dione (C8-azoacacH). When the enantiomers were doped in a nematic liquid crystal, they induced a chiral nematic phase with a helical twisting power (HTP) of 5-50 μm(-1). In particular, the sample doped with [{Pd(ii)(C8-azoacac)}2(baet)] exhibited a reversible change of the circular dichroism spectrum under alternate irradiation at 350 nm and 460 nm. It implied that the HTP changed reversibly in response to the cis-trans isomerization of the coordinated C8-azoacac ligand. |
| Doi | 10.1039/c4dt02812k |
| Pmid | 25594884 |
| Is Certified Translation | No |
| Dupe Override | No |
| Is Public | Yes |
| Language Text | English |