A new kind of dendritic supramolecular complex with porphyrin as a core-centre was prepared based on electrostatic attraction between tetraphenylporphyrinsulfonate anlon and polyether dendritic cations, which was conf...A new kind of dendritic supramolecular complex with porphyrin as a core-centre was prepared based on electrostatic attraction between tetraphenylporphyrinsulfonate anlon and polyether dendritic cations, which was confirmed by 1 H NMR, IR and elementary analysis.展开更多
The effect of rare earth ion Er 3+ on myoglobin(Mb) was studied by using Resonance Raman spectroscopy. The results show that with the variation of Er 3+ concentrations, both the oxidation state and spin state of Mb ar...The effect of rare earth ion Er 3+ on myoglobin(Mb) was studied by using Resonance Raman spectroscopy. The results show that with the variation of Er 3+ concentrations, both the oxidation state and spin state of Mb are sensitive to the perturbation of Er 3+ . Er 3+ added to Mb affects the oxidation and spin state synchronously. The structure sensitive groups of Mb are more accessible to the Er 3+ than other groups. According to the fluorometry and CD spectra studied and our results as mentioned above, we considered that Er 3+ does not interact with heme directly, and Er 3+ probably leads to the conformational changes of Mb due to the change of oxidation and spin state of Heme. [WT5HZ]展开更多
The band gap( E g) and HOMO level of pyrazoline derivative were obtained by UV Vis absorption spectra and electrochemical cyclic voltammetry methods. The effect of the molecular structure of pyrazoline on the energy b...The band gap( E g) and HOMO level of pyrazoline derivative were obtained by UV Vis absorption spectra and electrochemical cyclic voltammetry methods. The effect of the molecular structure of pyrazoline on the energy band structure was investigated. It was indicated that the HOMO level changed from -5.56 eV to -5.10 eV while the LUMO level changed from -2 68 eV to -2.36 eV with different substituents in pyrazoline derivatives. The results obtained showed that the energy band structure of pyrazoline derivatives could be adjusted through changing the molecular structure. [WT5HZ]展开更多
Aggregate structure, phase transition and their relationship to the preparation conditions of single chain Schiff base containing ammonium amphiphiles with different alkyl chains in aqueous vesicle bilayer were studie...Aggregate structure, phase transition and their relationship to the preparation conditions of single chain Schiff base containing ammonium amphiphiles with different alkyl chains in aqueous vesicle bilayer were studied with differential scanning calorimetry, X-ray diffraction and electronic absorption spectrum. The experimental results showed that the bilayer structure existed in aqueous solution was affected by the length of tall alkyl chain. The amphiphile with a dodecyloxy tail could form both paralell and interdigitated structures. By controlling the preparation condition one of these two stacking form could be obtained as the main structure.展开更多
The title complex Cp (CO)2FeSn(C6H11)3 was synthesized and it’s crystal structurewas determined by four-circle X-ray diffra tometer. The crystal belongs to monoclinic system, space group C2/c with parameters: a=1.947...The title complex Cp (CO)2FeSn(C6H11)3 was synthesized and it’s crystal structurewas determined by four-circle X-ray diffra tometer. The crystal belongs to monoclinic system, space group C2/c with parameters: a=1.947 6 (4) nm, b=0.882 6 (2) nm, c=2.915 8(6) nm, β= 95.49(3)°, Z=4. The two carbonyl groups attached to iron atom lie inabout right angles to each other and to the tin-iron axis. The three-fold axis passing throughthe iron atom and relating these three ligand directions is almost perpendicular to the plane ofthe cyclopentadienyl ring. The co-ordination of ligands around the tin atom is close to tetrahedral. The cyclohexyls are all in stable chair-conformations.展开更多
文摘A new kind of dendritic supramolecular complex with porphyrin as a core-centre was prepared based on electrostatic attraction between tetraphenylporphyrinsulfonate anlon and polyether dendritic cations, which was confirmed by 1 H NMR, IR and elementary analysis.
文摘The effect of rare earth ion Er 3+ on myoglobin(Mb) was studied by using Resonance Raman spectroscopy. The results show that with the variation of Er 3+ concentrations, both the oxidation state and spin state of Mb are sensitive to the perturbation of Er 3+ . Er 3+ added to Mb affects the oxidation and spin state synchronously. The structure sensitive groups of Mb are more accessible to the Er 3+ than other groups. According to the fluorometry and CD spectra studied and our results as mentioned above, we considered that Er 3+ does not interact with heme directly, and Er 3+ probably leads to the conformational changes of Mb due to the change of oxidation and spin state of Heme. [WT5HZ]
文摘The band gap( E g) and HOMO level of pyrazoline derivative were obtained by UV Vis absorption spectra and electrochemical cyclic voltammetry methods. The effect of the molecular structure of pyrazoline on the energy band structure was investigated. It was indicated that the HOMO level changed from -5.56 eV to -5.10 eV while the LUMO level changed from -2 68 eV to -2.36 eV with different substituents in pyrazoline derivatives. The results obtained showed that the energy band structure of pyrazoline derivatives could be adjusted through changing the molecular structure. [WT5HZ]
文摘Aggregate structure, phase transition and their relationship to the preparation conditions of single chain Schiff base containing ammonium amphiphiles with different alkyl chains in aqueous vesicle bilayer were studied with differential scanning calorimetry, X-ray diffraction and electronic absorption spectrum. The experimental results showed that the bilayer structure existed in aqueous solution was affected by the length of tall alkyl chain. The amphiphile with a dodecyloxy tail could form both paralell and interdigitated structures. By controlling the preparation condition one of these two stacking form could be obtained as the main structure.
文摘The title complex Cp (CO)2FeSn(C6H11)3 was synthesized and it’s crystal structurewas determined by four-circle X-ray diffra tometer. The crystal belongs to monoclinic system, space group C2/c with parameters: a=1.947 6 (4) nm, b=0.882 6 (2) nm, c=2.915 8(6) nm, β= 95.49(3)°, Z=4. The two carbonyl groups attached to iron atom lie inabout right angles to each other and to the tin-iron axis. The three-fold axis passing throughthe iron atom and relating these three ligand directions is almost perpendicular to the plane ofthe cyclopentadienyl ring. The co-ordination of ligands around the tin atom is close to tetrahedral. The cyclohexyls are all in stable chair-conformations.
