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1.
属-有机框架(MOFs)化合物由于其特定的孔道/孔洞结构以及在气体吸附/存储与分离、化学传感、光学、磁学以及荧光检测等方面的良好性能及潜在应用而成为当前人们关心和研究的热点。本文聚焦MOFs在溶剂分子和有机小分子荧光识别及传感方面的研究工作,着重介绍该领域近期的研究进展,并对该领域今后的发展进行了展望。  相似文献
2.
A metal-organic framework (1) based on a wavy and infinite chainshaped secondary building unit was constructed and it exhibited palpable luminescent sense effects for DMF and DMAC.  相似文献
3.
The CdII compound, namely [Cd(Tppa)(SO4)(H2O)]n ( 1 ) [Tppa = tris(4‐(pyridyl)phenyl) amine], was synthesized by the reaction of CdSO4 · 8H2O and Tppa under solvothermal conditions. Single crystal X‐ray diffraction analysis revealed that compound 1 features a 3D porous framework based on 1D inorganic –[Cd–SO4–Cd]n– chains. Topological analysis reveals that compound 1 represents a trinodal (3,4,6)‐connected topological network with the point symbol of {6.72}2{64.7.10}{64.75.84.102}. Gas adsorption properties investigations indicate that compound 1 exhibits moderate adsorption capacities for light hydrocarbons at room temperature. Luminescencence property studies revealed that this CdII compound exhibits high fluorescence sensitivity for sensing of CS2 molecule.  相似文献
4.
A series of isomorphic lanthanide metal–organic frameworks (MOFs) Ln(TATAB)?(DMF)4(H2O)(MeOH)0.5 (LnTATAB, Ln=Eu, Tb, Sm, Dy, Gd; H3TATAB=4,4′,4′′‐s‐triazine‐1,3,5‐triyltri‐p‐aminobenzoic acid) have been solvothermally synthesized and structurally characterized. Among these MOFs, TbTATAB exhibits good water stability and a high fluorescence quantum yield. Because mercury ions (Hg2+) have a high affinity to nitrogen atoms, and the space between multiple nitrogen atoms from triazine and imino groups is suitable for interacting with Hg2+ ions, TbTATAB shows highly selective and sensitive detection of Hg2+ in aqueous solution with a detection limit of 4.4 nm . Furthermore, it was successfully applied to detect Hg2+ ions in natural water samples.  相似文献
5.
The interaction of a presynthesized orange emitting Mn2+‐doped ZnS quantum dots (QDs) with L‐Cysteine (L−Cys) led to enhance emission intensity (at 596 nm) and quantum yield (QY). Importantly, the Mn2+‐doped ZnS QDs exhibited high sensitivity towards L−Cys, with a limit of detection of 0.4±0.02 μM (in the linear range of 3.3–13.3 μM) and high selectivity in presence of interfering amino acids and metal ions. The association constant of L−Cys was determined to be 0.36×105 M−1. The amplified passivation of the surface of Mn2+‐doped ZnS QDs following the incorporation and binding of L−Cys is accounted for the enhancement in their luminescence features. Moreover, the luminescence enhancement‐based detection will bring newer dimension towards sensing application.  相似文献
6.
This Minireview covers the latest developments of chemosensors based on transition‐metal receptors and organic fluorophores with specific binding sites for the luminescent detection and recognition of iodide in aqueous media and real samples. In all selected examples within the last decade (made‐post 2010), the iodide sensing and recognition is probed by monitoring real‐time changes of the fluorescence or phosphorescence properties of the chemosensors. This review highlights effective strategies to iodide sensing from a structural approach where the iodide recognition/sensing process, through supramolecular interactions as coordination bonds, hydrogen bonds, halogen bonds and electrostatic interactions, is transduced into an optical change easily measurable. The selective iodide sensing is an active field of research with global interest due to the importance of iodide in biological, medicinal, industrial, environmental and chemical processes.  相似文献
7.
8.
Two new metal–organic frameworks (MOFs), namely, three‐dimensional poly[diaquabis{μ2‐1,4‐bis[(2‐methyl‐1H‐imidazol‐1‐yl)methyl]benzene}bis(μ2‐glutarato)dinickel(II)] monohydrate], {[Ni2(C5H6O4)2(C16H18N4)2(H2O)2]·H2O}n or {[Ni2(Glu)2(1,4‐mbix)2(H2O)2]·H2O}n, ( I ), and two‐dimensional poly[[{μ2‐1,4‐bis[(2‐methyl‐1H‐imidazol‐1‐yl)methyl]benzene}(μ2‐glutarato)zinc(II)] tetrahydrate], {[Zn(C5H6O4)(C16H18N4)]·4H2O}n or {[Zn(Glu)(1,4‐mbix)]·4H2O}n ( II ), have been synthesized hydrothermally using glutarate (Glu2−) mixed with 1,4‐bis[(2‐methyl‐1H‐imidazol‐1‐yl)methyl]benzene (1,4‐mbix), and characterized by single‐crystal X‐ray diffraction, IR and UV–Vis spectroscopy, powder X‐ray diffraction, and thermogravimetric and photoluminescence analyses. NiII MOF ( I ) shows a 4‐connected 3D framework with point symbol 66, but is not a typical dia network. ZnII MOF ( II ) displays a two‐dimensional 44‐ sql network with one‐dimensional water chains penetrating the grids along the c direction. The solid‐state photoluminescence analysis of ( II ) was performed at room temperature and the MOF exhibits highly selective sensing toward Fe3+ and Cr2O72− ions in aqueous solution.  相似文献
9.
A new heterometallic coordination polymer, namely [Cd2Sr(bdc)3(H2O)2]n ( 1 ) (H2bdc = terephthalic acid), was synthesized via the solvothermal reaction of Cd(NO3)2, Sr(NO3)2, and H2bdc. The X‐ray structural analysis reveals that compound 1 is a 3D framework based on 1D rod‐shaped heterometallic metal‐carboxylate chains as building subunits. Viewing along the crystallographic c axis, there exist large 1D rhombic channels with effective dimensions of ca. 10.0 × 18.6 Å2. Moreover, compound 1 emits intense luminescence at room temperature. The investigations of luminescence indicated that compound 1 can be served as a luminescence probe for the detection of nitroaromatic explosives. Furthermore, the anticancer activity of 1 was evaluated against three human cancer cells MCF‐7, MDA‐MB‐231, and MDA‐MB‐435S via the MTT assay.  相似文献
10.
A cadmium chiral coordination polymer, formulated as [Cd(R‐cna)]n ( 1 ‐D) was constructed under hydrothermal method. Single‐crystal X‐ray diffraction analysis indicated that 1 ‐D exhibited a 2D layered structure with a point symbol of (47 · 63). 1 ‐D was further characterized by infrared spectra, powder X‐ray diffraction (PXRD), elemental analysis, thermogravimetric analysis (TGA), and circular dichroism spectra (CD). The second‐harmonic generation (SHG) property was investigated. It was also found that the luminescence of 1 ‐D can be quenched by iron ions and trinitrotoluene, indicating its potential application as luminescence sensing material.  相似文献
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