卟啉金属有机框架材料在传感领域的应用

卟啉金属有机框架材料(Por-MOFs)不仅具有MOFs独特的多孔性、高比表面积以及易功能化的优点,而且具有结构可调性及优异的光、电、磁性能.这些优异的性能使Por-MOFs可作为生物传感器的识别和信号单元.从Por-MOFs材料的制备方法、传感器的构建、传感机理等方面出发,着重对Por-MOFs在金属离子、生理活性物...     

卟啉金属有机框架材料的制备和应用进展

卟啉金属有机框架材料（metal-organic frameworks,MOFs）是近年来发展起来的一类新型金属有机框架材料。由于卟啉分子具有独特的光电结构,除了可作为MOFs结构中有机配体外,通过后修饰法将卟啉分子、功能性纳米材料组装在MOFs上,可得到各类功能性MOFs。因此,卟啉相关MOFs材料被广泛应用于多个领域,尤其是生物医学领域。本文从卟啉相关MOFs材料的合成策略、应用出发,综述了近5年来卟啉相关MOFs材料在光动力治疗、催化、传感等领域的研究进展,同时展望了卟啉相关MOFs材料在生物医学领域的应用。     

卟啉金属有机框架材料在光催化领域的应用

金属卟啉有机框架材料是一种由卟啉或金属卟啉作为结构单元构筑的新型周期性网状结构材料,既具有卟啉拓宽光谱响应范围、降低光生电子-空穴复合率的独特优势,又具有MOFs(金属有机骨架)材料的多孔道、孔道尺寸可调节、比表面积大的优势,成为目前具有良好光电性质的新型光催化剂。近年来,许多科学家们致力于新型光催化剂的开发与应用。尤其是近几年来,随着材料科学的发展,新型光催化剂金属卟啉MOFs成为光催化剂的研究热点并取得了令人欣慰的成果。该文综述了近十年来卟啉/金属卟啉MOFs在二氧化碳还原、裂解水制氢、光降解有机染料等领域的最新应用,并对未来卟啉金属有机框架在光催化领域的发展进行了展望。     

卟啉金属有机框架材料在光催化领域的最新应用

金属卟啉有机框架有机框架材料是一种由卟啉或金属卟啉作为结构单元构筑的新型周期性网状结构材料，既具有卟啉拓宽光谱响应范围、降低光生电子-空穴复合率的独特优势，又具有MOFs材料的多孔道、孔道尺寸可调节、比表面积大的双重优势，成为目前具有良好光电性质的新型光催化剂。近年来，许多科学家们致力于新型光催化剂的开发与应用。尤其是近几年来，随着材料科学的发展，新型光催化剂金属卟啉MOFs成为光催化剂的研究热点并取得了令人欣慰的成果。本文主要综述了近十年来卟啉/金属卟啉MOFs在二氧化碳还原、裂解水制氢、光降解有机染料等领域的最新应用，并对未来MPFs在光催化领域的发展进行了展望.     

卟啉基金属有机框架在光疗领域的应用

卟啉基金属有机框架是金属或金属团簇与卟啉配体或其家族化合物配位自组装形成的晶体结构,结合了卟啉类分子良好的光物理特性和生物相容性,具有周期性和可调控的结构,在光化学领域和生物医药领域具有应用潜力;尤其是能够充分发挥卟啉类分子的优越性能,可通过光动、光热等光辅助治疗方法实现杀伤有害细胞的效果。本文综述了卟啉基金属有机框架近年的发展及其在生物医学领域包括抗肿瘤、抗菌方向上的研究现状,重点介绍了近几年卟啉基金属有机框架在光敏剂基础上的改进以及衍生出的多样化的功能,对其发展前景做出了展望。     

金属-卟啉框架材料在光催化领域的应用

金属-有机框架(metal-organic frameworks,MOFs)是一种由金属离子或金属簇与多齿有机配体通过配位键连接而形成的有机无机杂化多孔晶态材料,具有较大的比表面积和孔道,同时结构也易于实现剪裁。近十几年MOFs在催化、气体吸附等领域得到了较大发展。卟啉等四吡咯大环结构有很好的光吸收特性,作为连接体应用于MOFs中可有效拓宽其吸收光谱,因此,基于卟啉配体的MOFs被广泛应用于光催化领域。本文综述了近十年来金属-卟啉框架材料在光催化选择性有机合成、析氢、析氧、还原CO₂、降解有机污染物方面的应用,同时对金属-卟啉框架材料未来在光催化领域的发展进行了展望。     

金属有机框架材料在PM2.5吸附净化方面的应用研究进展

随着城市化和工业化进程的飞速发展,空气污染问题日益加剧,其中,高浓度的细颗粒物对空气环境和人体健康的影响很大.在中国,细颗粒物,特别是环境空气中空气动力学当量直径≤2.5μm的颗粒物(PM2.5)已经是造成环境空气污染最主要原因之一了.近年来,金属有机框架材料(MOF)修饰的纤维介质过滤系统因其具有优异的吸附分离性能而...     

铁-锌卟啉框架材料及其可见光催化降解罗丹明B

以5,10,15,20-四-(4-羧基苯基)锌卟啉(ZnTCPP)为配体，以金属Fe为节点构筑了具有三维网状结构的铁-锌卟啉框架材料PCN-600(Zn)，采用PXRD、SEM、UV-vis DRS对所得材料进行了表征，并将其用于可见光下罗丹明B(RhB)的降解反应，考察了H2O2浓度对PCN-600(Zn)光催化性能的影响，并通过捕获实验确定了光催化反应过程中的主要活性物种，对比了PCN-600(Zn)与另一种锆-锌卟啉框架材料PCN-222(Zn)的光催化性能。结果表明，在H2O2的协同作用下，PCN-600(Zn)对RhB的降解表现出显著的催化活性，可见光照射90分钟后降解率可达94.2%，在实验范围内，随着H2O2浓度的增加，PCN-600(Zn)的催化活性不断提高，H2O2用量为4 mL时可最大程度上提升催化剂效率；实验证明在催化过程中，空穴（h+）为主要活性中间体，·OH 和·O2-也起到了一定的作用。此外，PCN-600(Zn)的光催化性能明显强于PCN-222(Zn)，相同实验条件下，前者罗丹明B的降解率可达95.9%，后者仅达67.6%。     

金属有机骨架材料对水中重金属的吸附性能

金属有机骨架材料(MOFs)是近些年来研究较多的一种新型多孔材料,具有超高表面积、孔径可调节等优点,被广泛应用于水中污染物的去除.对MOFs材料进行官能团修饰或与其它材料进行复合后,可提高材料的吸附性能和选择性,展现出更为优异的效果.本文综述了常见的几种MOFs材料对水中重金属的吸附性能,并为今后的研究方向提出几点展望...     

New Application of Hydroxyl Groups: Ligands for High Density Metal Organic Frameworks

Energetic metal organic frameworks (MOFs) with energetic anions as ligands can be used as new‐generation explosives. Many powerful anions have been introduced into energetic MOFs to improve the properties; however, the hydroxyl as a common group for energetic MOFs has rarely been studied. In this article, we present two examples of energetic MOFs ([Cu(atz)(NO₃)(OH)]_n) and [Zn(ata)(OH)] (atz=4‐amino‐1,2,4‐triazole; ata=5‐amino‐1H‐tetrazole) with the hydroxyl group as the ligand. Crystal structure analyses reveal that the two compounds possess compact two‐dimensional (2‐D) structures with densities up to 2.41 g cm⁻³ and 2.54 g cm⁻³, respectively. These two compounds have excellent physicochemical properties. The results demonstrate that a hydroxyl group as the ligands could commendably increase the densities of energetic MOFs, thereby enhancing the detonation performance. It is anticipated this work will open a new direction for the development of energetic MOFs.     

金属有机骨架材料在后合成修饰中的应用

金属有机骨架材料（MOFs）作为一类配位聚合物,具有孔洞结构、高比表面和独特的化学调变性。后合成修饰（PSM）能为MOFs的骨架引进新的官能团,改变MOFs的孔道环境,调变MOFs骨架的理化性质,有利于MOFs在更专属、更复杂领域的应用。本文对金属有机骨架材料（MOFs）在合成修饰中的应用进行了综述。     

金属-有机配合物的设计合成及其应用前景

介绍了通过合理选择特征配体、配体构犁和金属离子的配位模式及单晶到单晶的转化等结构影响因素控制金属-有机配合物的结构,论述了金属有机配合物在国内外的研究进展,介绍了其在各个方面的应用前景.     

Metal Organic Frameworks for Natural Gas Storage in Vehicles

With the increasing demand for alternative fuels the storage of natural gas (NG) in adsorbents like metal organic frameworks (MOFs) will become more important. In order to use MOFs as storage media in fuel delivery systems, the optimization of mass and energy transfer of the system is crucial. For rapid NG filling of a tank, molecules need to reach the adsorption sites within a reasonable time while the heat of adsorption should be dissipated to the environment. In this article, mass transfer in shaped bodies of MOFs was determined by permeability measurements and pulsed field gradient (PFG) NMR spectroscopy. The heat dissipation was also experimentally measured and both data sets were used to set up a theoretical density function theory model to predict the behavior of MOFs for NG storage.     

Recent Advances in Metal Complexes for Antimicrobial Photodynamic Therapy

Antimicrobial resistance (AMR) is a growing global problem with more than 1 million deaths due to AMR infection in 2019 alone. New and innovative therapeutics are required to overcome this challenge. Antimicrobial photodynamic therapy (aPDT) is a rapidly growing area of research poised to provide much needed help in the fight against AMR. aPDT works by administering a photosensitizer (PS) that is activated only when irradiated with light, allowing high spatiotemporal control and selectivity. The PS typically generates reactive oxygen species (ROS), which can damage a variety of key biological targets, potentially circumventing existing resistance mechanisms. Metal complexes are well known to display excellent optoelectronic properties, and recent focus has begun to shift towards their application in tackling microbial infections. Herein, we review the last five years of progress in the emerging field of small-molecule metal complex PSs for aPDT.     

金属-有机配合物的合成及其研究进展

介绍了金属-有机配合物的结构特点和合成方法,论述了金属有机配合物在国内外的研究进展,介绍了其在气体存储,尤其是储氢方面的研究现状以及其气体吸附性能。     

Impact of Defects on Pyrazolate Based Metal Organic Frameworks

The high strength of the metal-pyrazolate coordination bond allows the deliberate introduction of defects on pyrazolate based metal-organic frameworks without affecting the integrity of the porous crystalline network. Yet the presence of defects has a major impact on the properties of these systems which include higher pore accessibility and increased interactions with guest molecules, higher ion/electronic mobility and enhanced catalytic properties. In this review selected examples of the impact of the presence of defects in the capture of environmentally relevant gases, ion and electronic conductivity and catalytic properties of defective pyrazolate based metal organic frameworks are given.     

Metal Organic Frameworks as Solid Acid Catalysts for Acetalization of Aldehydes with Methanol

Room temperature acetalization of aldehydes with methanol has been carried out using metal organic frameworks (MOFs) as solid heterogeneous catalysts. Of the MOFs tested, a copper‐containing MOF [Cu₃(BTC)₂] (BTC=1,3,5‐benzenetricarboxylate) showed better catalytic activity than an iron‐containing MOF [Fe(BTC)] and an aluminium containing MOF [Al₂(BDC)₃] (BDC=1,4‐benzenedicarboxylate). The protocol was validated for a series of aromatic and aliphatic aldehydes and used to protect various aldehydes into commercially important acetals in good yields without the need of water removal. In addition, the reusability and heterogeneity of this catalytic system was demonstrated. The structural stability of MOF was further studied by characterization with powder X‐ray diffraction, Brunauer–Emmett–Teller surface area measurements and Fourier‐transformed infrared spectroscopic analysis of a deactivated catalyst used to convert a large amount of benzaldehyde. The performance of copper MOF as acetalization catalyst compares favourably with those of other conventional homogeneous and heterogeneous catalysts such as zinc chloride, zeolite and clay.