共查询到4条相似文献,搜索用时 46 毫秒
1.
Tetra(3-pyridyl)porphyrazine is soluble in trifluoroethanol yielding intense blue solutions. The electronic spectra exhibit the characteristic Soret and Q bands around 330 and 610 nm, respectively; however, the absorption profile is strongly dependent on the concentration, reflecting the occurrence of an association process. The system has been elucidated by solving the equilibrium and the absorbance-concentration equations for all the wavelengths in the spectral range, according to a variational procedure. In this way the consistent spectra of the individual species have been generated. The study has also been extended to the luminescence properties of the porphyrazine molecule, and discussed in terms of the ground state association and the exciplex formation involving the monomeric species. 相似文献
2.
Recently, we have discovered that—besides the all-optical photo-thermal bistability in transmission—the excitation of thin CdS films with the 514.5 nm line of an argon laser causes all-optical bistability in the luminescent radiation. The emitted radiation of the CdS layers lies far enough in the infrared region of the spectrum so that all-optical bistability in luminescence can be observed through GaAs wafers, i.e. an all-optical bistable loop remains in the direction of the propagation of the incident laser beam even though GaAs is strongly absorptive at the excitation wavelength. On the basis of this penetrating feature of all-optical bistability, we present a new concept for an architecture of future optical data processing devices. 相似文献
3.
在除水之外的7种非水液体和甘油的水溶液中,用修正的刹管法产生了有效直径达厘米量级的较大的瞬态单一空化气泡,这些气泡在崩溃时几乎都产生不同强度的光辐射。在其中的6种液体中,其光辐射强度与该液体的饱和蒸汽压和粘度是相关的。但在乙二醇和丙二醇中的气泡发光并不遵循这个规律,两者中的气泡发光都很强,但乙二醇中的发光强度的变化显示出某种非通常的规律性。本文还对瞬态单一气泡与通常的稳态单一气泡的发光特性进行了比较。 相似文献