Switching properties of fluorescent photochromic poly(methyl methacrylate) with spironaphthoxazine and D-π-A type pyran-based fluorescent dye.
Fluorescent photochromic poly(methyl methacrylate) (PMMA) with spironaphthoxazine (SPO) and D-π-A type pyran-base fluorescent dye as a fluorophore was synthesized by typical free radical copolymerization. The poly(MMA-co-SPO-co-fluorophore) in both solution and solid film exhibited excellent photoregulated fluorescence switching behavior and reversible modulation of fluorescence intensity using alternating irradiation with UV and visible light. The poly(MMA-co-SPO-co-fluorophore) also showed viscosity and conductivity switching behaviors along with photoresponse.
Blends made from N-salicylidene aniline sulfonate derivatives and a polyampholyte matrix: in situ synthesis vs. solution mixing
Blend materials were prepared by the insertion of N-salicylidene aniline sulfonate derivatives inside an ampholyte polymer matrix. In addition to a classic insertion method based on homogeneous solution mixing, a new methodology was developed. The in situ synthesis of guest molecules inside the polymer taking advantages of the ionic nature of the dyes/matrix components is used for the first time for the preparation of blend materials with anionic anils. This method allows a strong electrostatic anchorage of the anion to the host matrix. Insertion occurs without perturbing the lamellar organization of the host polymer matrix. Infrared and diffuse reflectance UV-vis spectroscopies were implemented to investigate the host–guest interactions and an insertion model was drawn.
Research on automatic tracking solar power system
The paper elaborates the features of solar power. On the foundation of it, it analyses the composing, the theory and the features of solar power system of automatic tracking, analyzing the function of mental composing and the important technology, making a compartment of the amount of generation of solar power system of automatic tracking and that of common solar power system.