The dissolution behavior of solid nickel in static liquid zinc saturated with Fe at 723 K was studied. The results show that when immersing solid Ni in liquid Zn saturated with Fe, the intermetallic compound layers co...The dissolution behavior of solid nickel in static liquid zinc saturated with Fe at 723 K was studied. The results show that when immersing solid Ni in liquid Zn saturated with Fe, the intermetallic compound layers consisted of γ and δ phases are formed on nickel substrate, which is the same as that in liquid pure zinc. However, some Γ2 particles are formed in the liquid near the solid/liquid interface. These Γ2 particles can easily heterogeneously nucleate on ζ particles and grow fast. The dissolution process is governed by diffusion of nickel atom across a concentration boundary layer in liquid Zn saturated with Fe, and is different from a mixed control mechanism of nickel in liquid pure zinc. The participation of Γ2 particles makes the dissolution of solid Ni in the liquid accelerated.展开更多
Two new chiral Schiff base acacen-derivative nickel（II） and copper（II） complexes have been prepared and characterized with IR, electronic, and CD spectra and X-ray crystallography. So-called artifact peaks of soli...Two new chiral Schiff base acacen-derivative nickel（II） and copper（II） complexes have been prepared and characterized with IR, electronic, and CD spectra and X-ray crystallography. So-called artifact peaks of solid-state CD spectra due to restricted to rotate freely of molecules appeared at about 334 and 460 nm for nickel（II） and copper（II） complexes. Changes of intensity of the peaks have been investigated in different matrices such as solid-state （microcrystals or KBr pellets）, PMMA cast films and acetone solutions of various concentrations and pure acetone solutions. Although restricted orientation of molecules in rigid matrices leads to increase the peak intensity toward negative and positive optical rotation for nickel（II） and copper（II） complexes, respectively, the degree of increasing intensity depends on not concentration but viscosity of polymer solutions. Therefore, the artifact CD peaks of solid-state can act as an indicator of environmental viscosity of soft mater matrices.展开更多
文摘The dissolution behavior of solid nickel in static liquid zinc saturated with Fe at 723 K was studied. The results show that when immersing solid Ni in liquid Zn saturated with Fe, the intermetallic compound layers consisted of γ and δ phases are formed on nickel substrate, which is the same as that in liquid pure zinc. However, some Γ2 particles are formed in the liquid near the solid/liquid interface. These Γ2 particles can easily heterogeneously nucleate on ζ particles and grow fast. The dissolution process is governed by diffusion of nickel atom across a concentration boundary layer in liquid Zn saturated with Fe, and is different from a mixed control mechanism of nickel in liquid pure zinc. The participation of Γ2 particles makes the dissolution of solid Ni in the liquid accelerated.
文摘Two new chiral Schiff base acacen-derivative nickel（II） and copper（II） complexes have been prepared and characterized with IR, electronic, and CD spectra and X-ray crystallography. So-called artifact peaks of solid-state CD spectra due to restricted to rotate freely of molecules appeared at about 334 and 460 nm for nickel（II） and copper（II） complexes. Changes of intensity of the peaks have been investigated in different matrices such as solid-state （microcrystals or KBr pellets）, PMMA cast films and acetone solutions of various concentrations and pure acetone solutions. Although restricted orientation of molecules in rigid matrices leads to increase the peak intensity toward negative and positive optical rotation for nickel（II） and copper（II） complexes, respectively, the degree of increasing intensity depends on not concentration but viscosity of polymer solutions. Therefore, the artifact CD peaks of solid-state can act as an indicator of environmental viscosity of soft mater matrices.
