The NMR and FT\|IR Spectra of ten (ηC 6H\-9CRR′ Cp)\-2MCl\-2 (M=Ti,Zr) were measured.The constructions of the compounds were identified by 1H NMR and 13 C NMR spectra.All complexes are bonded by M\|Cp through center...The NMR and FT\|IR Spectra of ten (ηC 6H\-9CRR′ Cp)\-2MCl\-2 (M=Ti,Zr) were measured.The constructions of the compounds were identified by 1H NMR and 13 C NMR spectra.All complexes are bonded by M\|Cp through center of Cp.The vibration modes were reasonably assigned,absorption of ν s M\|Cp (A\-1) (M=Ti and Zr) vibration all appear in 310?cm -1 or so,while ν as M\|Cp (B) appear around 410?cm -1 and 360?cm -1 for Ti and Zr respectively.The influence of the center metal atoms and the substituents upon the NMR and FT\|IR spectra were discussed.展开更多
The secondary structures of native cytochrome c(cyt c) in both solid and solution states and four platinum modified cyt c derivatives in solution were determined by means of Fourier transform infrared spectroscopy. I...The secondary structures of native cytochrome c(cyt c) in both solid and solution states and four platinum modified cyt c derivatives in solution were determined by means of Fourier transform infrared spectroscopy. It was found that the secondary structure of cyt c in solid state is similar to that in the solution. In the cases of platinum modified cyt c derivatives, when the binding sites of platinum complex are on or near the surface of the protein, its secondary structure is similar to that of native cyt c. However, when the platinum complex binds to Met 80 ligand and causes the replacement of the second axial ligand by non native Lys 79 ligand or H 2O supplied by solvent, there is a significant difference between the structures of low or high spin state cyt c derivatives and that of native cyt c. The results suggest that axial ligand Met 80 residue plays an important role in stabilizing the secondary structure of cyt c.展开更多
文摘The NMR and FT\|IR Spectra of ten (ηC 6H\-9CRR′ Cp)\-2MCl\-2 (M=Ti,Zr) were measured.The constructions of the compounds were identified by 1H NMR and 13 C NMR spectra.All complexes are bonded by M\|Cp through center of Cp.The vibration modes were reasonably assigned,absorption of ν s M\|Cp (A\-1) (M=Ti and Zr) vibration all appear in 310?cm -1 or so,while ν as M\|Cp (B) appear around 410?cm -1 and 360?cm -1 for Ti and Zr respectively.The influence of the center metal atoms and the substituents upon the NMR and FT\|IR spectra were discussed.
文摘The secondary structures of native cytochrome c(cyt c) in both solid and solution states and four platinum modified cyt c derivatives in solution were determined by means of Fourier transform infrared spectroscopy. It was found that the secondary structure of cyt c in solid state is similar to that in the solution. In the cases of platinum modified cyt c derivatives, when the binding sites of platinum complex are on or near the surface of the protein, its secondary structure is similar to that of native cyt c. However, when the platinum complex binds to Met 80 ligand and causes the replacement of the second axial ligand by non native Lys 79 ligand or H 2O supplied by solvent, there is a significant difference between the structures of low or high spin state cyt c derivatives and that of native cyt c. The results suggest that axial ligand Met 80 residue plays an important role in stabilizing the secondary structure of cyt c.
