The study of preparation and luminescence of polymethyl methacrylate/rare earth composite luminescent materials

The alkaline-earth–rare-earth–aluminate systems phosphors are the new types of phosphors, which process very bright, safer, and excellent photoluminescence. Because of hydrolysis, however, the capacity of luminescent materials will fall down and the use value of luminescent materials will also be lost. Water-resistant polymers, which can form a kind of water-resistant clad on the surface of luminescent material powder, will solve this problem and the significance of its application is important. In this study, the polymethyl methacrylate (PMMA)/rare earth composite luminescent materials were prepared through grafting emulsion polymerization of methyl methacrylate onto the surface of luminescent materials. To study the structure and properties of the PMMA/rare earth composite luminescent materials, Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), and photoluminescent properties were measured. From the curves of FTIR and TGA, we can find that the organic parts are attached with the inorganic parts in the PMMA/rare earth composite luminescent materials. The results of luminescent decay curves show that the resistance to water of the PMMA/rare earth composite luminescent materials is much better than that of the unmodified luminescent materials because the organic parts had been grafted on the luminescent materials.     

Recent advances in organic pressure-responsive luminescent materials

Pressure is a powerful tool to regulate the molecule aggregation and intermolecular interactions. Organic luminescent materials under high pressure can produce rich phenomena,which have many potential applications.     

Recent advances in organic pressure-responsive luminescent materials

Organic luminescent materials are very sensitive to external stimuli,such as pressure,temperature,and electric field.The luminescent properties of some organic luminescent materials significantly change under high pressure.Some materials may show luminescence discoloration,whereas some may exhibit luminescence enhancement.These properties have many potential applications in anticounterfeiting,force sensor,data recording and storage,and luminescent devices,thereby greatly attracting the attention of scientists.In this review,the progress of research on these materials at high pressure in recent years is summarized.     

纳米发光材料研究的若干进展

本文综述纳米发光材料的研究进展情况,着重总结了（稀土）掺杂型纳米发光材料的制备方法和表征手段,同时介绍了这些纳米发光材料的性质和应用,并对其未来发展趋势进行了展望。     

Synthesis and properties of coumarin derivatives and their terbium complexes

A series of coumarin derivatives obtained from salicylaldehyde and phenol were synthesized. Their corresponding terbium complexes were prepared and characterized by elemental analysis, EDTA titrations, molar conductivity, UV–vis spectra, IR spectra, and thermal analysis. The luminescent properties and electrochemical properties of the terbium complexes were also investigated. The results showed that all the terbium complexes exhibited characteristic emissions of terbium ions. The introduction of electron-donating groups can improve the luminescent properties, decrease the HOMO and LUMO energy levels of the terbium complex, while electron-withdrawing groups can weaken the luminescent properties, and increase the HOMO and LUMO energy levels of terbium complex.     

Applications of luminescent inorganic and organometallic transition metal complexes as biomolecular and cellular probes

The rich photophysical properties of luminescent inorganic and organometallic transition metal complexes, such as their intense, long-lived, and environment-sensitive emission, render them excellent candidates for biological and cellular studies. In this Perspective, we review examples of biological probes derived from luminescent transition metal complexes with a d(6), d(8), or d(10) metal center. The design of luminescent covalent labels and noncovalent probes for protein molecules is discussed. Additionally, the recent applications of these complexes as cellular probes and bioimaging reagents are described. Emphasis is put on the structural features, photophysical behavior, biomolecular interactions, cellular uptake, and intracellular localization properties of luminescent transition metal complexes.     

Synthesis of a Novel Blue—light—emitting Polymer Material Bearing Coumarin Pendants

A novel blue luminescent polymer bearing coumarin pendants was prepared. Its luminescent properties were determined indicating that it had strong blue fluorescent properies and good film formation ability. This novel polymer can be used as a blue organic electroluminescent material (OELM) in organic electroluminescent devices.     

Luminescent complexes with ligands containing C=N bond

Data on luminescent complexes with azomethine ligands are generalized and systematized. The synthesis and luminescent properties of complexes with acyclic and cyclic azomethines are considered.     

Synthesis of Two Blue-light-emitting Complexes with Schiff Base Calixarene as the Ligand

Two new blue luminescent zinc and beryllium complexes with Schiff base calixarene derivative as the ligand were prepared.Their luminescent properties were determined,which indicated that they had strong blue fluorescent properties.They also had good solubility and film formation.These new complexes can be used as blue organic electroluminescent materials (OELMs) in organic electroluminescent devices.     

Monoradically luminescent polymers by a super acid-catalyzed polymerization and deep-red electroluminescence

Luminescent radicals have received great attention recently due to their idiographic luminescent properties and potential 100%utilization efficiency of doublets under electrical excitation. However, luminescent radical polymers are rarely explored owing to their challenging molecular design and synthesis. Herein, we report an efficient approach to construct luminescent radical polymers by a super acid-catalyzed polymerization reaction proceeded at room temperature, which intrinsically avoid the heavy metal catalyst. The obtained polymers exhibit the unique paramagnetic signals, good thermal properties, and excellent photostability. Moreover, the quantifiable electroluminescence of such radical polymers was demonstrated for the first time.     

Novel synthesis of organic nanowires and their optical properties

Aligned nanowires of organic luminescent material were prepared by introducing the organic luminants into nanochannels of variable size in an anodic aluminum oxide (AAO) membrane, and the emission spectra from these nanowire arrays exhibited novel size-dependent luminescent properties.     

无机纳米稀土发光材料的制备方法*

无机纳米稀土发光材料作为一种重要的发光材料,由于具有独特的光、电和化学性质,使其在高性能磁体、发光器件、显示、生物标记、光学成像和光学治疗等方面得到了广泛的应用。稀土发光材料的这些性质与材料的尺寸和形状密切相关,近年来研究者已经利用多种合成方法制备了不同形状的纳米稀土发光材料,包括纳米线、纳米棒、纳米管、纳米纤维和纳米片等。本文综述了无机纳米稀土发光材料的几种常用的制备方法,包括水热/溶剂热法、有机/无机前驱体热分解法和超声辅助合成法等,评述了这些方法的优缺点,并结合课题组在无机纳米稀土发光材料制备方面的工作,对无机纳米稀土发光材料制备方法的发展进行了展望。     

铝酸盐光致发光材料的相组成与粒径

介绍了铝酸盐光致发光材料的研究历程和特殊的发光机理，总结和讨论了相组成以及粒径对发光性能的影响，认为今后的工作重点是建立相组成与制备方法之间稳定的对应关系，从晶体化学的角度研究基质和掺杂离子对发光特性的影响，研究高温制备多组分纳米材料技术并对其粒子进行修饰。     

High-selectivity Detection of 2,4,6-Trinitrophenol Based on Fluorescent Mg-MOF-74 in Ethanol Solution

Mg-MOF-74 has adsorption capacity while less research is about its luminescent properties. In this work, the fluorescent properties of Mg-MOF-74 were studied and characterized. The results show that Mg-MOF-74 exhibits excellent fluorescent properties and, most strikingly, selective sensing detection for nitroaromatic compounds(NACs), 2,4,6-trinitrophenol(PA) in particular, making it a promising PA-selective luminescent probe. This work demonstrates the application of MOFs in the detection of NACs with good selectivity.     

Some features of luminescent properties of PbS suspensions,stabilized by high‐molecular polyvinylpyrrolidone

The results of the investigations of optical and luminescent properties of PbS suspensions stabilized by high‐molecular polyvinylpyrrolidone are described. Suspensions prepared by liquid colloidal method from sodium sulfide and lead nitrate demonstrate strong luminescence in near infrared spectral range at the excitation by visual light with different wavelengths. It was proposed that Förster resonant energy transfer plays the important role in luminescence properties of closed packed PbS particles. The model, which describes the observed luminescent properties of the suspensions PbS‐stabilized high‐molecular polymer, is proposed. The combination of very wide spectral range of excitation of the luminescence with rather narrow range of light radiation in near infrared spectral range determine wide perspectives of the materials in solar luminescent concentrators and photodetectors. Copyright © 2015 John Wiley & Sons, Ltd.     

NEW TRENDS IN THE DESIGN OF LUMINESCENT METAL COMPLEXES*

The requirements needed for an ideal luminophore are discussed with reference to the luminescent properties of organic molecules and metal complexes. Recent strategies for the design of luminescent metal complexes are discussed, with particular emphasis on cage-type complexes and oligonuclear homo- and hetero-metallic complexes.     

稀土无机发光材料:电子结构、光学性能和生物应用

目前,稀土无机发光材料在激光、光通讯、平板显示、荧光生物标记和纳米光电子器件等领域具有广泛的应用前景.稀土离子(从Ce到Yb)是一类性能优异的结构和光谱探针,其在不同介质材料中的光学性能主要取决于其局域态的电子结构和激发态动力学.对稀土发光材料开展深入的光学和光电子学基础研究有助于发现新颖的光学性能或开辟新的应用领域.依托研制的低温高分辨激光光谱和上转换量子产率等仪器,本课题组致力于稀土无机发光材料电子结构与性能研究,近年来在发光材料的控制合成、电子结构、光学性能及生物应用等方面取得了系列重要结果.这些研究有望加快实现稀土无机发光材料在生物应用的突破,实现稀土资源的高值利用.     

Luminescent Metallo‐Supramolecular Polymers

Luminescent metallo‐supramolecular polymers are a type of functional supramolecular architectures which integrates the advantages of emission, metal‐coordination, supramolecular chemistry as well as polymeric properties to realize advanced functions. Due to the abundant stimuli‐responsiveness of supramolecular assemblies and the light‐emitting properties, they have been widely applied as chemo‐sensors, light‐emitting devices, contrast agents for bio‐imaging, etc. In this review, we classify luminescent metallo‐supramolecular polymers based on the types of species (lanthanides, organometallic compounds, oligomer or polymer‐based ligands, small‐molecule‐based organic ligands) used to generate the luminescence and summarize recent developments of luminescent metallo‐supramolecular polymers. We mainly focus on the functions and applications of luminescent metallo‐supramolecular polymers and hope to give our reader a snapshot of research on luminescent metallo‐supramolecular polymers and encourage more scientists to devote into this promising area.     

Functional Construction of Dual-Emitting 4-Aminonaphthalimide Encapsulated Lanthanide MOFs Composite for Ratiometric Temperature Sensing

Considering size effect and functionalized pore interaction dyes guests and MOFs hosts, 4-aminonaphthalimide was successfully introduced into the pore of LnMOF for the first time and constructed 4-ANA⊂LnMOF luminescent composites with excellent dual-emission properties. A series of temperature-dependent luminescence test results show that 4-ANA⊂Gd4L3 can be used as a reversible ratiometric luminescent temperature sensor. The functional construction method provides ideas for the development of clear purpose novel dual-emission dye⊂LnMOF ratiometric luminescent sensors.     

Design of luminescent iridium(III) and rhenium(I) polypyridine complexes as in vitro and in vivo ion,molecular and biological probes

Many luminescent transition metal polypyridine complexes display intense and long-lived triplet charge-transfer and intraligand transition emission with a large Stokes’ shift. These properties render them promising candidates as luminescent probes for ions, DNA, peptides, proteins and other biological entities. In this review article, we have summarised recent reports on ion, molecular and biological probes derived from luminescent rhenium(I) and iridium(III) polypyridine complexes. These complexes have been appended with different recognition moieties that interact with ions and biological molecules. The recognition is reflected by a change of spectroscopic and/or photophysical properties of the probes. The use of these complexes as cellular probes and imaging reagents has also been discussed.