The value of the second-order harmonic generation for the powder of 10-alkylacridones, synthesized by using acridone, was measured by using Nd: YAG as a laser source and the results show that these compounds have a go...The value of the second-order harmonic generation for the powder of 10-alkylacridones, synthesized by using acridone, was measured by using Nd: YAG as a laser source and the results show that these compounds have a good nonlinear optical property and the differences of the volume and electron property for the different substitutents on 10-position have a little effect on their values of second-order harmonic generation(SHG).展开更多
An optically active rod coil rod triblock copolymer containing poly(ethylene oxide)(PEO) as the flexible segment and poly{(+) 2,5 bis[4′ ((s) 2 methyl butoxy) phenyl]styrene} (PMBPS) as the rigid segment,PMBPS b PEO ...An optically active rod coil rod triblock copolymer containing poly(ethylene oxide)(PEO) as the flexible segment and poly{(+) 2,5 bis[4′ ((s) 2 methyl butoxy) phenyl]styrene} (PMBPS) as the rigid segment,PMBPS b PEO b PMBPS,was synthesized via atom transfer radical polymerization.The PMBPS block had a stable helical conformation with an excess of screw sense in solution.The self assembly behavior of the triblock copolymer in dioxane/water mixed solvents was examined by means of TEM and turbidity measurements.The triblock copolymer molecules aggregated when water content in the system was about 2wt%. The higher the initial polymer concentrations,the lower the critical water content.They formed vesicles with highly dispersed outside diameters,but they had a relatively uniform wall thickness of (27±3) nm.展开更多
文摘The value of the second-order harmonic generation for the powder of 10-alkylacridones, synthesized by using acridone, was measured by using Nd: YAG as a laser source and the results show that these compounds have a good nonlinear optical property and the differences of the volume and electron property for the different substitutents on 10-position have a little effect on their values of second-order harmonic generation(SHG).
文摘An optically active rod coil rod triblock copolymer containing poly(ethylene oxide)(PEO) as the flexible segment and poly{(+) 2,5 bis[4′ ((s) 2 methyl butoxy) phenyl]styrene} (PMBPS) as the rigid segment,PMBPS b PEO b PMBPS,was synthesized via atom transfer radical polymerization.The PMBPS block had a stable helical conformation with an excess of screw sense in solution.The self assembly behavior of the triblock copolymer in dioxane/water mixed solvents was examined by means of TEM and turbidity measurements.The triblock copolymer molecules aggregated when water content in the system was about 2wt%. The higher the initial polymer concentrations,the lower the critical water content.They formed vesicles with highly dispersed outside diameters,but they had a relatively uniform wall thickness of (27±3) nm.
