【摘要】 在氨水体系中制备了MCM-41-水杨酸、MCM-41-水杨酸-Tb3+、MCM-41-水杨酸-邻菲咯啉-Tb3+,并通过XRD、IR、激发与发射光谱等技术对其进行了表征。在氨水和室温条件下就可获得规整有序、结晶度高、稳定性好的组装体样品。MCM-41-水杨酸体系中,水杨酸掺杂浓度为0.025g时发光最强。在MCM-41-水杨酸-Tb3+体系中,低强度激发下,Tb3+自身并不发光,但对水杨酸起到敏化作用,随Tb3+用量的增加,水杨酸发光逐渐增强;高能量激发下,提高了水杨酸和Tb3+的激发态密度,无论是低温(7K)还是高温(300K),均观察到Tb3+的由5D3→7F5,5D4→7F6,5D4→7F4的发光。在MCM-41-水杨酸-邻菲咯啉-Tb3+体系中,MCM-41的表面晶格场对配体单重态和三重态能级有较大的影响,第二配体邻菲咯啉S1态吸收的能量向Tb3+转移的效率增加,使Tb3+荧光发射强度增强。更多还原

【Abstract】 MCM-41-salicylic acid,MCM-41-salicylic acid-Tb3+ and MCM-41-salicylic acid-phen-Tb3+ were prepared in the ammonia system.The structure and properties were characterized by XRD,IR,excitation and emission spectroscopy.The samples synthesized in ammonia medium at room temperature possessed ordered structure,highly crystallinity and good stability.Salicylic acid was the most luminous at doping concentration of 0.025 g.In low-intensity excitation,Tb3 + was not luminous itself,but it promoted the sensitivity to salicylic acid.High-energy excitation increased the excited state density of salicylic acid and Tb3+ion.Both at lower temperature(7 K) and higher temperature(300 K),luminescence of Tb3+ 5D3→7F5,5D4→7F6,5D4→7F4 were all observed.The surface lattice field of MCM-41 impacted the energy level of single state and three states of salicylic acid and o-phenanthroline.The efficiency of energy transfer from the second ligand o-phenanthroline to Tb3+ increased,and luminous intensity of Tb3+ enhanced.更多还原