Design, Synthesis, and Biological Activity Evaluation of 5-Aryl-cyclopenta[]pyridine Derivatives.

Taking the natural product cerbinal as the lead compound, 30 novel 5-aryl-cyclopenta[]pyridine derivatives were designed and synthesized based on the previous bioactivity studies of the cyclopenta[]pyridines. The modification of the position-5 of compound was achieved by amination, bromination, and cross coupling using cerbinal as the raw material. The results of the bioactivity tests demonstrated that partial compounds exhibited superior activity against plant viruses compared to compound .

On-Off Ratiometric Fluorescence Europium(III) Metal-Organic Framework for Quantitative Detection of the Inflammatory Marker Neopterin.

Benefiting from the unique photoluminescence behavior of the lanthanide(III) ions and organic ligands, a lanthanide(III) metal-organic framework (Ln-MOF) material can simultaneously demonstrate photoluminescence of lanthanide(III) cations and organic molecules and endow its superior applications of fluorescence sensing behaviors. Herein, we present a europium(III) MOF material {[Eu(BPTA)·(CHCOO)·3DMA]·0.5DMA·3HO} () (where HBPTA is 3,3',5,5'-biphenyltetracarboxylic acid) for photoluminescence performance of quantitatively sensing the inflammatory marker neopterin (Neo).

Ratiometric Fluorescence Thermometry, Quantitative Gossypol Detection, and CO Chemical Fixation by a Multipurpose Europium (III) Metal-Organic Framework.

A lanthanide-based molecular crystalline material endows metal-organic frameworks (MOFs) with many fascinating applications such as fluorescence detection and CO chemical fixation. Herein, we describe and study a multipurpose europium(III) MOF with the formula of {[Eu(TATAB)]·2.5HO·2DMF} () (where HTATAB is 4,4',4″-((1,3,5-triazine-2,4,6-triyl)tris(azanediyl))tribenzoic acid ligand) for photoluminescence sensor matrix and CO chemical fixation.

A turn-on fluorescent Zn(II) metal-organic framework sensor for quantitative anthrax biomarker detection.

2,6-Pyridine dicarboxylic acid (DPA) is considered one of the main anthrax biomarkers, and the detection of DPA is of great significance. This work presents a Zn(II)-based metal-organic framework (MOF) with the formula {[Zn(2,6-NBC)(vlpy)Zn(2,6-NBC)(vlpy)]·0.8(2,6-HNBC)·HO} (1) assembled from 2,6-naphthalenedicarboxylic acid (2,6-HNBC) and 4,4'-vinylenedipyridine (vlpy) for a photoluminescence sensor matrix for DPA detection.

Self-assembly of octanuclear Ln(III)-based clusters: their large magnetocaloric effects and highly efficient conversion of CO.

The design and construction of high-nuclear lanthanide clusters with fascinating topology and functional properties have been an active area of research, however, the development of an effective approach for obtaining high-nuclear lanthanide clusters with multifunctional properties is still extremely difficult. Up to now, a systematic approach for guiding the further expansion of Ln(III)-based clusters showing good functional properties is lacking. Herein, we design and synthesize a polydentate Schiff base ligand (HL), which reacts with β-diketonate salts Ln(acac)·2HO, and a series of Ln clusters [Ln(acac)(L)(μ-O)(μ-CHO)(μ-Hacac)]·2CHCN (Ln(III) = Gd (1), Dy (2), and Ho (3); HL = pyridine-2-carboxylic acid (5-hydroxymethyl-furan-2-ylmethylene)-hydrazide, Hacac = acetylacetone) have been successfully synthesized.

Two luminescent lanthanide(iii) metal-organic frameworks as chemosensors for high-efficiency recognition of Cr(vi) anions in aqueous solution.

Two new lanthanide(iii) metal-organic frameworks (MOFs) {[(CH3)2NH2]2[Ln4(FDA)7(DMF)2]·0.5DMF}n [Ln = Eu (1), and Tb (2)] based on furan-2,5-dicarboxylic acid (H2FDA) have been successfully assembled and well characterized in detail. These MOFs are isostructural and demonstrate 12-connected sqc15 topologies, which are rarely observed in MOF chemistry, especially in lanthanide(iii) MOFs.

Tuning the luminescence of two 3d-4f metal-organic frameworks for the fast response and highly selective detection of aniline.

Two 3D solvent-stable zinc(ii)-lanthanide(iii) heterometallic metal-organic frameworks (MOFs) {[(CH)NH][ZnLn(FDA)(DMF)]·2DMF} [Ln = Eu (Zn-Eu) and Tb (Zn-Tb); HFDA = furan-2,5-dicarboxylic acid] based on ZnLn(COO) tetrametallic clusters and furan-2,5-dicarboxylic acid have been successfully synthesized. These MOFs can serve as luminescent sensors for the fast response and highly selective detection of aniline via luminescence quenching. More importantly, a linear correlation is observed between their luminescence and the low concentration of aniline and the detection limits of aniline are 7.

Two three-dimensional lanthanide frameworks exhibiting luminescence increases upon dehydration and novel water layer involving in situ decarboxylation.

Two three-dimensional polymeric Tb(III) and Yb(III) frameworks, namely, {[Tb3(Hptc)(ptc)(pdc)(H2O)6]·2H2O}n (1) and {[Yb2(ptc)(ox)(H2O)5]·7H2O}n (2) (H4ptc = pyridine-2,3,5,6-tetracarboxylic acid, H2pdc = pyridine-3,5-dicarboxylic acid, ox = oxalate), have been synthesized by a hydrothermal method and characterized by infrared spectra, elemental analysis, powder X-ray diffraction, thermogravimetric analysis, and single-crystal X-ray diffraction. Framework 1 shows an interesting three-dimensional (8,8)-connected net with a Schläfli symbol of (3(3)·4(18)·5(5)·6(2))2(3(6)·4(14)·5(7)·6), while 2 exhibits an unusual (4,8)-connected sqc21 net with a Schläfli symbol of (3(2)·4(2)·5(2))(3(4)·4(8)·5(12)·6(4)). Luminescence studies of 1 reveal that the luminescence intensity increases when the framework is dehydrated.

A homospin cobalt(II) topological ferrimagnet.

An unusual 3D homospin cobalt(II) molecular topological ferrimagnet has been successfully assembled using a mixed ligand approach, which shows a critical temperature of 9 K and a compensation temperature of 5 K.