纤维素/稀土杂化光致发光材料研究进展

Research Progress of Cellulose/Rare-earth Hybrid Photoluminescent Materials

中文关键词:  纤维素  稀土离子  杂化材料  荧光

Key Words:cellulose  rare-earth ion  hybrid material  fluorescence

中文摘要:

      镧系元素是一种金属稀土元素，其三价离子（Ln³⁺）具有独特的电子层结构，容易与氮、氧原子配位，具有独特的荧光性能，通过与有机配体配位可形成具有特殊拓扑结构的高配位化合物。但其内在缺陷如难以加工成形、伴随副反应发生、难降解等限制了其实际应用，因此通常需将稀土配合物与高分子基材复合以制备杂化材料。与传统高分子相比，新一代杂化基材——纤维素具有高比表面积、易降解、可再生、化学可修饰性等优点，逐渐被用作稀土杂化光致发光材料的载体。本文首先阐述了稀土金属的发光机理，随后对纤维素/稀土杂化光致发光材料的制备及其近年来在生物成像、医用敷料、荧光防伪、光电转换、荧光探针方面的研究进展进行了综述，并对其发展趋势进行了展望。

Abstract:

      Lanthanide is a metal rare-earth element； its trivalent ion （Ln³⁺） is prone to coordination with nitrogen and oxygen atoms due to their unique electronic layer structure， and exhibits unique fluorescence properties. The coordination of organic ligands forms high-coordination complexes with special topological structures. However， the inherent defects such as difficulty in processing and molding， accompanying side reactions， and refractory degradation limit the practical application of rare-earth coordination compound. Therefore， it is normally composited with polymer base to fabricate hybrid materials. Compared with traditional polymers， cellulose， as a new generation of hybrid matrix base materials， has the advantages of high specific surface area， degradability， renewability， and chemical modifiability， and is gradually used as the carrier for rare-earth hybrid luminescent materials. In this review， the research progress of cellulose/rare earth hybrid materials in bioimaging， medical dressings， photoelectric conversion， fluorescence anti-counterfeiting， and fluorescent probes in recent years was summarized， and its development trend was prospected.