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| 2. |
- Sun, S. G., et al.
(författare)
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Studies on a series of rhenium(I) bipyridyl photosensitive dyes
- 2004
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Ingår i: Youji huaxue. - 0253-2786. ; 24:8, s. 953-956
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Tidskriftsartikel (refereegranskat)abstract
- A series of rhemium(I) 2,2'-bipyridyl complexes [fac-(4,4'-di-COOEt-bpy)Re(CO)(3)(Xpy)PF6] (bpy = 2, 2'-bipyridine; py = pyridine; X = 3-methyl, 3-hydroxy, 3-amino, H) were synthesized. Their electrochemical properties, ground state electronic spectra and emission spectra were studied in acetonitrile. As the X group became more electron donating from H to 3-methyl, 3-hydroxy or 3-amino, the Re(II/I) oxidation potentials declined, the MLCT absorption maximum of the complex was changed little, the emission maximum blue-shifted, and the emission intensity and the fluorescence lifetime were decreased.
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| 3. |
- Sun, S. G., et al.
(författare)
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Synthesis of rhenium(I) bipyridyl and ruthenium(II) tris-bipyridyl photosensitive dyes used for solar cells
- 2004
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Ingår i: Gaodeng xuéxiào huàxué xuébào. - 0251-0790. ; 25:1, s. 67-70
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Tidskriftsartikel (refereegranskat)abstract
- There has been a growing effort to convert solar energy into electricity in recent years. In order to get a stable solar cell system and acquire a high incident photon-to-current conversion efficiency(IPCE), two novel rhenium(I) bipyridyl and ruthenium(II) tris-bipyridyl photosensitive dyes were synthesized, the ethoxycarbonyl group in the dyes could be employed for covalently linking to the surface of the nanostructured TiO2. Their structures, photophysical and electrochemical properties were studied. The UV-Vis absorption maxima were 382 and 476 nm; emission maxima were 622 and 672 nm, respectively. The Re(I/II) oxidation potential is significantly positive than that of Ru(II/III) which provides a larger driving force for electron transfer. The results show that they both have proper redox potentials, enough stability and are suitable for being used as photosensitizers of solar cells.
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| 4. |
- Zhang, J., et al.
(författare)
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Mechanism of periodically distributed fracture in reinforced concrete beam under uniaxial tension
- 2007
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Ingår i: Yingyong Lixue Xuebao. - 1000-4939. ; 24:4, s. 646-651
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Tidskriftsartikel (refereegranskat)abstract
- A numerical code RFPA3D(Three-Dimension Realistic Failure Process Analysis) is employeel to simulate the three-dimensional failure process of reinforced concrete under uniaxial tension. Then the analysis focuses on the stress distribution during the failure process and failure mechanism of the concrete and reinforcement. The numerical tests indicate the periodically distributed fracture in the reinforced concrete structure and the numerical analysis reproduces the complete process of the fracture initiation, infilling and saturation, 3D numerical tests with different thickness of concrete covers reveal that the eritical value of the fracture spacing increases and the crack numbers decreases with increasing ratio of the thickness of the concrete cover to that of the steel bar
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