摘要
针对有机光活性分子易于聚集、光热稳定性差等缺陷,将有机发光客体引入层状稀土氢氧化物(LRHs)层间,制备有机/无机复合发光材料。利用层板稀土阳离子与层间有机阴离子的协同作用,期望得到发光可调的多色发光材料。通过改进的均匀沉淀法制备了硝酸根型层状钆氢氧化物NO3-LGdH,采用离子交换法将7-羟基香豆素(7HC)与表面活性剂1-辛烷磺酸钠(OS)共同引入层间得到有机/无机复合体。通过XRD、IR、SEM、PL等表征了复合体的结构、形貌及发光性质。研究结果表明,有机物7HC在NO3-LGdH层板间为横向排布,OS引入可使复合体层间距明显增大,此时7HC可在层间竖直排布。复合体基本保持了NO3-LGdH前驱体的拉长六边形片状形貌,但形成了柱状或花状聚集体。改变激发波长可实现发光调控,得到由紫色到蓝色的复合发光材料,为新型有机/无机复合发光材料的开发和研究提供了新思路。
Considering the drawback of organic photoactive molecules that they are liable to aggregate and have bad lightheat stability,fabrication of layered rare-earth hydroxides（LRHs）inorganic/organic luminescent composites are intercalated by organic luminescent guests.Prepare tunable multicolor luminescent materials by the synergistic effect of layered rare-earth cations and interlayer organic anions.In this paper,the layered rare-earth hydroxides precursors NO3-LGdH have been prepared by a modified homogeneous precipitation method.The 7-hydroxyl coumarin（7HC）and surfactants 1-octane sulfonic acid sodium（OS）were introduced to its interlayers by ion-exchange method to form organic/inorganic composites.The structures,morphology and luminescence properties were investigated by XRD,IR,SEM,PL.The research results indicate that 7HC molecules may locate horizontally while the introduction of OS leads to a larger basal spacing and may correspond to a vertical arrangement.The composites remain the hexagonal plate-like morphology of precursors,but some grow into columnar or flower-like aggregates.Luminescent composite materials with colors from violet to blue can be obtained by controlling the excitation wavelengths.This work may offer a beneficial approach to fabricating novel organic-inorganic luminescent composite materials.
出处
《北京石油化工学院学报》
2016年第2期1-6,共6页
Journal of Beijing Institute of Petrochemical Technology
基金
北京市大学生研究训练URT资助项目(2016J00103)
