Dual-response fluorescence sensing of HPO and CO using AJP filter paper based on a pH-stable Cd-based luminescent metal-organic framework.

A new Cd-based luminescent metal-organic framework (LMOF) with the formula {[Cd(BIBT)(NDC)]·solvents} (JXUST-32, BIBT = 4,7-bi(1-imidazol-1-yl)benzo-[2,1,3]thiadiazole and HNDC = 2,6-naphthalenedicarboxylic acid) was successfully synthesized by a solvothermal method. JXUST-32 shows a two-dimensional (4,4)-connected network and exhibits significant fluorescence red shift and slight enhancement for HPO and CO sensing with detection limits of 0.11 and 0.

Turn-on and blue-shift fluorescence sensor toward L-histidine based on stable Cd metal-organic framework with tetranuclear cluster units.

A novel Cd-based two-fold interpenetrated metal-organic framework (MOF), namely {[Cd(BTDB)(4,4-bpy)]·DMF} (JXUST-14), (H2BTDB = 4,4'-(benzo[][1,2,5]thiadiazole-4,7-diyl)dibenzoic acid and 4,4-bpy = 4,4-bipyridine), has been prepared and characterized. Single-crystal structure determination reveals that JXUST-14 has a tetranuclear cluster based 6-connected topological network with Schlafli symbol {4·6}. When soaked in common organic solvents and aqueous solutions with diverse pH values of 2-12 for 48 h, JXUST-14 remains stable.

Fluorescent sensors for aldehydes based on luminescent metal-organic frameworks.

Volatile aldehydes cause great harm to human health and the living environment, and the detection of aldehydes has attracted much attention from chemists and material scientists. In recent years, as one of the most promising classes of functional materials, luminescent metal-organic frameworks (LMOFs) have bloomed as fluorescent sensors for the detection of aldehydes. Herein, the sensing properties of LMOF sensors toward formaldehyde, benzaldehyde, acetaldehyde and other aldehydes have been reviewed, and the sensing mechanism and applications are also illustrated.

Turn-On Luminescent Sensor toward Fe, Cr, and Al Based on a Co(II) Metal-Organic Framework with Open Functional Sites.

A novel Co-based metal-organic framework (MOF) with the formula of {[Co(BIBT)(BTC)(HO)]·solvents} (, where denotes Jiangxi University of Science and Technology, BIBT = 4,7-bi(1-imidazol-1-yl)benzo-[2,1,3]thiadiazole, and HBTC = 1,3,5-benzenetricarboxylic acid) has been solvothermally prepared, which takes 3D structure with a rare 3,4,6-c topology and contains intramolecular hydrogen bonds. Interestingly, the sensing investigations suggest that could be considered as a multifunctional fluorescence sensor toward Fe, Cr, and Al via a turn-on effect with good reusability and detection limits of 0.13, 0.

Cd -Organic Frameworks Fabricated with a N-Rich Ligand and Flexible Dicarboxylates: Structural Diversity and Multi-Responsive Luminescent Sensing for Toxic Anions and Ethylenediamine.

Three metal-organic frameworks {[Cd(L)(glu)]⋅3 H O} (1), {[Cd (L) (adi) ]⋅5 H O} (2) and {[Cd(L)(sub)]⋅3 H O⋅DMA } (3) (L=pyridine-3,5-bis(5-azabenzimidazole), H glu=glutaric acid, H adi=adipic acid and H sub=suberic acid) were obtained under solvothermal conditions. Complex 1 shows a 2D (4,4) network constructing of Cd -glu and Cd-L chains. Complex 2 presents a 2-fold interpenetrating 3D framework with pcu topology.

A Cd -Based Metal-Organic Framework with pcu Topology as Turn-On Fluorescent Sensor for Al.

A new metal-organic framework (MOF) {[Cd (bbib) (ndc) ]⋅2DMF} (JXUST-1) (bbib=1,3-bis(benzimidazolyl)benzene, H ndc=1,4-naphthalenedicarboxylic acid, DMF=N,N-dimethylformamide) has been solvothermally synthesized and characterized by single-crystal X-ray diffraction, PXRD, TGA, IR and elemental analysis. JXUST-1 exhibits a three-dimensional 6-connected pcu topology with a Schläfli symbol {4 .6 } constructed by [Cd (CO ) ] secondary building units.

A Zn-Based Metal-Organic Framework with a Rare tcj Topology as a Turn-On Fluorescent Sensor for Acetylacetone.

A Zn-based metal-organic framework (MOF) with a rare tcj topology has been solvothermally synthesized and displays relatively good thermal and chemical stabilities. Interestingly, the MOF can sensitively and selectively sense acetylacetone (acac) via a fluorescence enhancement effect with a detection limit of 0.10 ppm and good reusability, which demonstrates the first example of a MOF-based turn-on fluorescent sensor for acac.

Temperature- and vapor-induced reversible single-crystal-to-single-crystal transformations of three 2D/3D Gd-organic frameworks exhibiting significant magnetocaloric effects.

By using GdO, propanedioic acid (Hpda) and oxalic acid (Hox), a new Gd-based metal-organic framework (MOF) [Gd(pda)(ox)(HO)] (1) has been successfully constructed and structurally characterized. Interestingly, temperature- and vapor-induced reversible single-crystal-to-single-crystal transformations occurred and two new MOFs, namely [Gd(pda)(ox)(HO)] (1a) and [Gd(pda)(ox)] (1b), have been obtained. Complex 1 displays a two-dimensional (2D) layer structure composed of zigzag [Gd(pda)] chains and it could also be made up of numerous Gd macrocycles.