CAJ | 학술논문

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→7F5（545nm）、5D4→7F4（584nm）和5D4→7F3（619nm）电子轨道跃迁特征峰，其最强的5 D4→7 F5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75 min后趋于平稳。
재불동반응시간하제비료CMC／Tb납미복합물，병통과SEM、FT-IR、XPS、UV-Vis급형광광보고찰료저사복합물적형모、결구급기형광성능。결과표명： CMC／Tb복합물위구형과립상적입자，기척촌위100 nm좌우；불동반응시간하Tb3＋리자여CMC건합방식상사，도여CMC분자련상적—OH、—COO －이급—COC중O원자발생화학반응，단유우반응과정중CMC대분자적구상존재동태평형，사득산물중적배위결구략유차이；CMC위주요적광능량흡수체，능유효민화 Tb3＋리자발사착적5 D4→7 F6（489 nm ）、5 D4→7F5（545nm）、5D4→7F4（584nm）화5D4→7F3（619nm）전자궤도약천특정봉，기최강적5 D4→7 F5약천록색형광발사특정봉적반봉관소우10 nm，이기강도수반응시간연장이상하파동，병재75 min후추우평은。
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 UV-Vis spectra and PL spectra .The results show that (1) CMC/Tb nano-particles are spherical particles and the parti-cle 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 co-ordination 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 Tb 3+ions to make the CMC/Tb nano-particles exhibit four characteristic narrow emission bands , namely, 5D4→7F6(489 nm), 5D4→7F5(545 nm), 5D4→7 F4 (584 nm) and 5D4→7 F3 (619 nm); and (5) in the four emission bands, the 5 D4→7 F5 transition with the green emission is the most prominent band of the Tb 3+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.