在不同反应时间下制备了CMC /Tb 纳米复合物，并通过SEM、FT-IR、XPS、UV-Vis 及荧光光谱考察了这些复合物的形貌、结构及其荧光性能． 结果表明: CMC /Tb 复合物为球形颗粒状的粒子，其尺寸为100 nm 左右; 不同反应时间下Tb³⁺ 离子与CMC 键合方式相似，都与CMC 分子链上的—OH、—COO － 以及—COC 中O 原子发生化学反应，但由于反应过程中CMC 大分子的构象存在动态平衡，使得产物中的配位结构略有差异; CMC 为主要的光能量吸收体，能有效敏化Tb³⁺ 离子发射窄的⁵ D₄ →⁷ F₆ ( 489 nm) 、⁵ D₄ → ⁷ F₅ ( 545 nm) 、⁵ D₄→⁷ F₄ ( 584 nm) 和⁵ D₄→⁷ F₃ ( 619 nm) 电子轨道跃迁特征峰，其最强的 ⁵D₄→⁷F₅ 跃迁绿色荧光发射特征峰的半峰宽小于10 nm，而其强度随反应时间延长而上下波动，并在75min 后趋于平稳．

CMC /Tb nano-particles were synthesized in different reaction times. Then,the morphology, structure and fluorescence properties of the complexes were investigated by means of SEM, FT-IR and XPS and by using UVVis spectra and PL spectra. The results show that (1) CMC /Tb nano-particles are spherical particles and the particle sizes are around 100 nm; (2) for different reaction times, Tb³⁺ ions bind CMC in a similar way, specifically, all the Tb³⁺ ions react with the atom O of —OH, —COO and —COC groups on CMC chain; (3) however, the coordination structures of CMC /Tb nano-particles are different due to the dynamic equilibrium of CMC conformation during the reaction; (4) CMC acts as the primary light energy absorber and it can effectively sensitize Tb³⁺ ions to make the CMC /Tb nano-particles exhibit four characteristic narrow emission bands, namely, ⁵D₄→⁷F₆ ( 489 nm) , ⁵D₄→⁷F₅ ( 545 nm) , ⁵D₄→⁷F₄ ( 584 nm) and ⁵D₄→⁷F₃ ( 619 nm) ; and ( 5) in the four emission bands,the ⁵D₄→⁷F₅ transition with the green emission is the most prominent band of the Tb³⁺ ions, moreover, its half-peak width is less than 10 nm, and its intensity fluctuates with the reaction time and becomes steady after 75 minutes.