disordered structure
1.The obtained results indicated that hydrochloric acid favors formation of the cubic mesophase, nitric acid was favorable for the formation of the hexagonal mesophase, while acetic acid leads to formation of the disordered structure.
2.Amorphous materials have disordered atomic structure as compared to crystalline materials: that is, they have only short-range order rather than the long-range periodicity of crystals.
3.Powder XRD analysis shows that a main phase with disordered TbCu7-type structure is obtained in as-solutioned magnets. The 1:7 phase has a uniaxial magnetocrys-talline anisotropy with easy axis along < 002 > direc- tion.
4.By scanning electron microscopic (SEM) qualitative observation, for the treated samples (corn cob and others),the length of fibre bundle shows shortened, its arrangement disordered, the morphology and structure of fibre changed significantly into a dilatation and loosen state.
5.Transmission electron microscopic studies on the lazurite from the contact metamorphic zone of pegmatites and dolomitic marbles in South Baikal, Russia, revealed a new type of domain structure intergrown with ordered and disordered domains on a very small scale(≤100nm).
6.Abstract: Polyphenylacetylenes were synthesized by ［Rn(nbd)Cl］2 and WCl6/Ph4Sn catalyst systems in N2 at room temperature.Polymers with high yield and high molecular weight were obtained.Their structures were characterized by UV,IR,NMR and GPC,respectively.The fluorescence of the polymer solution with different concentration was investigated using variable excitation wavelength from UV to visible region.The relation between fluorescence and polymer structure was studied.The results showed that the molecular chain structure has great influence on fluorescence of the polymers.The emitting peak wavelength of fluorescence for the polymer of high stereoregularity is independent of solution concentration and excitation wavelength.The emitting peak wavelength of fluorescence for the polymer with disordered molecular chain arrangement varies with changing the solution concentration and excitation wavelength,and different emission sites in molecular chains and low emitting yield are shown.The measurement and analysis of fluorescence spectroscopy of polyphenylacetylenes may provide some useful information to judge the molecular chain arrangement in some conjugated polymers.
