| 초록 |
The polymerization of acetylene derivatives with chiral center was performed by such transition metal catalysts as PdCl2, PtCl2, (bicyclo[2.2.1]hepta-2,5-diene)dichloropalladium(II), (bicyclo[2.2.1]hepta-2,5-diene)chlororhodium(I) dimmer, and Mo-based catalysts. In most cases, these catalysts were found to be effective for this acetylene monomer having a highly bulky chiral substituents to give a relatively high yield of polymer. The polymer structure of the resulting poly(17a-ethynyltestosterone) was characterized by various instrumental methods such as NMR, IR, UV-visible spectroscopies and elemental analysis. The IR spectrum of poly(17a-ethynyltestosterone) showed neither the acetylenic ≡C-H stretching band nor the acetylenic C≡C stretching band, which were presented at the IR spectrum of monomer. The poly(17a-ethynyltestosterone)s were light brown powder and completely soluble in aromatic and halogenated hydrocarbon solvents such as benzene, chlorobenzene, chloroform, and 1,1,1-trichloroethane, but insoluble in methanol and n-hexane. The photoluminescence and chiro-optical properties of the resulting poly(17a-ethynyltestosterone) were also measured and discussed. |
