利用真空热蒸发的方法,在云母片上制备分子层数可控的锌卟啉(ZnTPP)分子薄膜.随着分子层数的增多,ZnTPP薄膜的光致荧光(Photoluminescence,PL)光谱从单体特征渐变为二聚体特征;原子力显微镜(Atomic Force Microscope,AFM)的图像中,ZnTP...利用真空热蒸发的方法,在云母片上制备分子层数可控的锌卟啉(ZnTPP)分子薄膜.随着分子层数的增多,ZnTPP薄膜的光致荧光(Photoluminescence,PL)光谱从单体特征渐变为二聚体特征;原子力显微镜(Atomic Force Microscope,AFM)的图像中,ZnTPP分子团簇成纳米尺度的岛状结构,非真空环境导致纳米岛进一步聚集,从而使二聚体特征峰荧光强度激增;样品荧光寿命表明在非真空环境下分子的二聚体衰减通道比例显著增加.展开更多
A novel Λ-shaped compound DMCEM based on Trger′s base was designed,synthesized and its photophysical properties were examined in detail.DMCEM exhibited an aggregation-induced emission enhancement(AIEE) effect and ...A novel Λ-shaped compound DMCEM based on Trger′s base was designed,synthesized and its photophysical properties were examined in detail.DMCEM exhibited an aggregation-induced emission enhancement(AIEE) effect and emitted strong red fluorescence in solid states and faint fluorescence in the dilute solution.Nanocrystals of DMCEM ranging from 60 to 160 nm with well-defined spherical shape were prepared.The DMCEM naoparticles possess special size dependence on their optical properties.The red shift of the absorption and the blue shift of the emission with the increase in the particle size may be attributed to the increased rigidification of the crystal lattice and the associated decrease of vibrational relaxation.展开更多
文摘利用真空热蒸发的方法,在云母片上制备分子层数可控的锌卟啉(ZnTPP)分子薄膜.随着分子层数的增多,ZnTPP薄膜的光致荧光(Photoluminescence,PL)光谱从单体特征渐变为二聚体特征;原子力显微镜(Atomic Force Microscope,AFM)的图像中,ZnTPP分子团簇成纳米尺度的岛状结构,非真空环境导致纳米岛进一步聚集,从而使二聚体特征峰荧光强度激增;样品荧光寿命表明在非真空环境下分子的二聚体衰减通道比例显著增加.
文摘A novel Λ-shaped compound DMCEM based on Trger′s base was designed,synthesized and its photophysical properties were examined in detail.DMCEM exhibited an aggregation-induced emission enhancement(AIEE) effect and emitted strong red fluorescence in solid states and faint fluorescence in the dilute solution.Nanocrystals of DMCEM ranging from 60 to 160 nm with well-defined spherical shape were prepared.The DMCEM naoparticles possess special size dependence on their optical properties.The red shift of the absorption and the blue shift of the emission with the increase in the particle size may be attributed to the increased rigidification of the crystal lattice and the associated decrease of vibrational relaxation.
