Coordination Site Selective Occupation Strategy for Tuning the Photosalient Effects of Photoactive Cd Complexes.

The application of photo responsive crystals to useful actuation demands a rational design to elicit controllable movement. The [2+2] photocycloaddition reaction triggers mechanical motion using associated photosalient (PS) effects. We herein report a coordination site selective occupation strategy to modulate the arrangement of C=C bonds and thereby tune the PS effect.

Clinical predictors of surgical intervention for gastrointestinal magnetic foreign bodies in children.

Background/aims: To investigate the clinical situation, treatment methods, and clinical predictors of surgical intervention in children with magnetic foreign bodies in the digestive tract.

Materials And Methods: From January 2019 to June 2022, we retrospectively analyzed the clinical data of 72 children who ingested magnetic foreign bodies inadvertently in our hospital, including their general information, admissions, clinical manifestations, and treatment methods, as well as pertinent literature and statistical data. Following software processing, univariate and multivariate logistic regression analyses were conducted to determine the independent risk factors of this study.

Constructing Built-in Electric Field in Heterogeneous Nanowire Arrays for Efficient Overall Water Electrolysis.

Efficient bifunctional electrocatalysts for hydrogen and oxygen evolution reactions are key to water electrolysis. Herein, we report a built-in electric field (BEF) strategy to fabricate heterogeneous nickel phosphide-cobalt nanowire arrays grown on carbon fiber paper (Ni P-CoCH/CFP) with large work function difference (ΔΦ) as bifunctional electrocatalysts for overall water splitting. Impressively, Ni P-CoCH/CFP exhibits a remarkable catalytic activity for hydrogen and oxygen evolution reactions to obtain 10 mA cm , respectively.

Coordination Polymer-Mediated Molecular Surgery for Precise Interconversion of Dicyclobutane Compounds.

A Cd(II)-based coordination polymer {[Cd(5-F-1,3-bpeb)(FBA)]·HO} () was obtained from Cd(II) salt, 5-fluoro-1,3-bis[2-(4-pyridyl)ethenyl]benzene (5-F-1,3-bpeb), and -fluorobenzoic acid (HFBA). Within the one-dimensional chain structure of , a pair of 5-F-1,3-bpeb was arranged in a face-to-face style. Upon UV irradiation and heat treatment, multiple cyclobutane isomers, including specific monocyclobutanes ( with an -cyclobutane ring in and with an -cyclobutane ring in ) and dicyclobutanes (,-dicyclobutane in , ,-dicyclobutane in , and ,-dicyclobutane in ) were stereoselectively produced.

Facile Strategy for Preparing a Rosin-Based Low- Material: Molecular Design of Free Volume.

Low- dielectrics are urgently needed in modern integrated circuits. The introduction of free volume instead of porous structures has become a powerful strategy to reduce the value. According to this strategy, the biomass resource rosin-containing hydrogenated phenanthrene ring was introduced into benzocyclobutene (BCB) resin to reduce the value; then a rosin-based BCB monomer was successfully synthesized.

Controllable multiple-step configuration transformations in a thermal/photoinduced reaction.

Solid-state photochemical reactions of olefinic compounds have been demonstrated to represent powerful access to organic cyclic molecules with specific configurations. However, the precise control of the stereochemistry in these reactions remains challenging owing to complex and fleeting configuration transformations. Herein, we report a unique approach to control the regiospecific configurations of C = C groups and the intermediates by varying temperatures in multiple-step thermal/photoinduced reactions, thus successfully realizing reversible ring closing/opening changes using a single-crystal coordination polymer platform.

Tunable photosalient behaviours within coordination polymers functional molecular prearrangements.

Four Cd(II)/diene coordination polymers (CPs) with similar 1D chain motifs exhibit different photosalient (PS) behaviours in response to UV light. The [2+2] photoreaction between the CC groups within these CPs results in diverse PS behaviours of their crystals with different CC pair arrangements. The interesting PS behaviours of these CPs can be applied in design and fabrication of advanced photoactuating materials.

CircRNA-ACAP2 contributes to the invasion, migration, and anti-apoptosis of neuroblastoma cells through targeting the miRNA-143-3p-hexokinase 2 axis.

Background: Circulating RNAs (Circ-RNAs) are tightly related to the processes of neuroblastoma. The circ-ACAP2 has been reported as dysregulated in various cancers; however, its biological roles and mechanisms in neuroblastoma remain largely unclear.

Methods: We collected 40 neuroblastoma tissues and adjacent noncancerous tissues.

New structurally diverse photoactive cadmium coordination polymers.

Four structurally diverse coordination polymers 1-4 (CP1-CP4) were designed and constructed from Cd(II) ions and various carboxyl ligands (Hoba, 4,4'-oxydibenzoic acid; Hbpa, ()-4,4'-(ethene-1,2-diyl)dibenzoic acid; Hpbda, 4,4'-((1,3-phenylenebis(methylene))bis(oxy))dibenzoic acid) and the alkene containing ligand (CH-bpeb, 4,4'-((1,1')-(2,5-dimethyl-1,4-phenylene)bis(ethene-2,1-diyl))dipyridine). CP1-CP4 possess Cd binuclear secondary building units (SBUs). The geometry of the dicarboxylate ligands and the reaction conditions determined the final structure with a variety of motifs.

Tuning the configuration of the flexible metal-alkene-framework affords pure cycloisomers in solid state photodimerization.

The photochemical [2+2] cycloaddition of 3,5-bis-(2-(pyridin-4-yl)vinyl)pyridine (bpvp) in the flexible Cd-based metal-alkene frameworks produced different isomeric photoproducts depending on the auxiliary and guest molecules. The bulkiness of the guest molecules influenced the conformation of the ligand, and thus the outcome of the cycloaddition reaction.

Modulating the regioselectivity of solid-state photodimerization in coordination polymer crystals.

Coordination polymers [Cd(1,4-bpeb)(L1)] (1), [Zn2(1,4-bpeb)2(L2)2(SO42-)2] (2) and [Cd(1,4-bpeb)(L3)] (H2O) (3) (H2L1, 3-[2-(3-hydroxy-phenoxymethyl)-benzyloxy]-benzoic acid; HL2, 1H-Indazole-3-carboxylic acid; H3L3, benzene-1,2,3-tricarboxylic acid; 1,4-bpeb, 1,4-bis[2-(4-pyridyl)vinyl]benzene have been synthesized under solvothermal conditions. Complexes 1-3 underwent photodimerization in the solid-state to give quantitative yields of single isomeric products. The choice of carboxyl ligands L and metal center determined the arrangement of 1,4-bpeb ligands, which in turn directed the regiochemistry of the final photoproducts.

Amino group decorated coordination polymers for enhanced detection of folic acid.

A series of fluorescent coordination polymers (CPs) {[Cd(CH-bpeb)(BDC)] CP1, (BDC)/(NH-BDC)-CP1, (BDC)/(NH-BDC)-CP1, (BDC)/(NH-BDC)-CP1, (BDC)/(NH-BDC)-CP1, (NH-BDC)-CP1} were prepared from conjugated ligand 4,4'-((2-methyl-1,4-phenylene)bis(ethene-2,1-diyl))bipyridine (CH-bpeb), terephthalic acid (BDC), aminoterephthalic acid (NH-BDC) and CdSO under solvothermal conditions. The fluorescence of aqueous suspensions of these CPs was quenched by folic acid (FA) in a concentration dependent manner. The efficiency of quenching increasing with an increased proportion of NH-BDC ligand in the CP with (NH-BDC)-CP1 exhibiting a low detection limit of 1.

Coordination-Driven Stereospecific Control Strategy for Pure Cycloisomers in Solid-State Diene Photocycloaddition.

To obtain a pure product without the isomer byproducts is a goal that many chemists are pursuing. As one kind of very important synthesis method, the photochemical reaction is simple and straightforward yet low-selective. In this work, a coordination interaction-based oriented synthesis strategy has been proposed to realize the precise stereochemical control of the isomeric cyclic compounds in the photocycloaddition reaction.

Dual-response detection of Ni and Cu ions by a pyrazolopyrimidine-based fluorescent sensor and the application of this sensor in bioimaging.

Herein, a dual-response fluorescent sensor, L, based on pyrazolopyrimidine was designed and developed for the simultaneous detection of Ni and Cu ions in the presence of other metal ions; the structural characterization of L was carried out by FTIR spectroscopy, NMR spectroscopy, HRMS and X-ray diffraction analysis. The sensor L effectively displayed fluorescence quenching towards the Ni and Cu ions with high sensitivity without interference from other metal ions. The results reveal that L binds to Ni and Cu in a 2 : 1 pattern, which matches well with the result of the Job's plot.

Platinum(ii) complexes with rutaecarpine and tryptanthrin derivatives induce apoptosis by inhibiting telomerase activity and disrupting mitochondrial function.

Four new platinum(ii) complexes, [Pt(Rut)(DMSO)Cl] (), [Pt(Try)(DMSO)Cl] (), [Pt(ITry)(DMSO)Cl] () and [Pt(BrTry)(DMSO)Cl] (), with rutaecarpine (Rut), tryptanthrin (Try), 8-iodine-tryptanthrin (ITry) and 8-bromo-tryptanthrin (BrTry) as ligands were synthesized and fully characterized. In these complexes, the platinum(ii) adopts a four-coordinated square planar geometry. The inhibitory activity evaluated by the MTT assay showed that (IC = of 0.

A pyrazolopyrimidine based fluorescent probe for the detection of Cu and Ni and its application in living cells.

A fluorescent sensor L based on a pyrazolopyrimidine core simultaneously detects Cu and Ni ions by photoluminescence quenching, even in the presence of other metal cations. Sensor L possesses high association constants of 5.24 × 10 M and 2.

Stereoselective Solid-State Synthesis of Substituted Cyclobutanes Assisted by Pseudorotaxane-like MOFs.

Regioselective photodimerization of trans-4-styrylpyridine (4-spy) derivatives is performed using pseudorotaxane-like Zn-based metal organic frameworks MOFs as templates. The formation of rctt-HT (head-to-tail) dimers is achieved by confining pairs of coordinated 4-spy derivative ligands within hexagonal windows and then irradiating them with UV light. It is also possible to achieve a photodimerization reaction where two different substituted 4-spy ligands are included in such a MOF material.

Controlled formation of chiral networks and their reversible chiroptical switching behaviour by UV/microwave irradiation.

A 3D coordination polymer {[Cd(L(1))(L(2))]2}n (1) spontaneously resolves into enantiomorphic crystals of 1P and 1M without any chiral source. Bulk quantities of 1P and 1M can be predictably and reliably obtained by using chiral cyclohexane-1,2-diamine. 1 can be transformed into {[Cd(L(1))(L(3))0.

A Zn(II) coordination polymer and its photocycloaddition product: syntheses, structures, selective luminescence sensing of iron(III) ions and selective absorption of dyes.

One coordination polymer [Zn2(L)2(bpe)2(H2O)2] (1) (L = 4,4'-((1,2-phenylenebis(methylene))bis(oxy))dibenzoic acid; bpe = (E)-1,2-di(pyridin-4-yl)ethene) was prepared and structurally determined. Compound 1 has a chain structure in which its pair of bpe ligands is arranged in a head-to-tail manner with their C=C bonds being close enough for a [2 + 2] cycloaddition reaction. Upon exposure to UV light, compound 1 undergoes a single-crystal-to-single-crystal (SCSC) [2 + 2] photodimerization to generate one 2D coordination polymer [Zn(L)(rctt-tpcb)0.

In-situ X-ray diffraction snapshotting: determination of the kinetics of a photodimerization within a single crystal.

In a single-crystal-to-single-crystal (SCSC) transformation, a preformed three-dimensional coordination polymer,[Ni3(oba)2(bpe)2(SO4)(H2O)4]· H2O (H2oba = 4,4'-oxydibenzoic acid; bpe = (E)-1,2-di(pyridin-4-yl)ethane) (1), was shown to undergo a [2+2] cycloaddition reaction upon exposure to UV irradiation. The kinetics of this reaction were followed by taking "snapshots" of the solid state transformation using in situ single crystal X-ray crystallography; a first order process was indicated. The reaction rate was influenced by many factors such as the separation of the sample from the UV light source, the heat produced by the UV irradiation, the light flux of the UV lamp used, the size of the single-crystal and the powder samples.

[Control effects of Ricinus communis extracts on Meloidogyne incognita].

Toxicity test and pot experiment were conducted to study the nematocidal activity and control effects of Ricinus communis extracts on Meloidogyne incognita. The results showed that both the ricinine and the R. communis water extracts had high nematocidal activity.

[Study on synthesis and fluorescence characterization of europium and terbium complexes of 1-(5-(2-hydroxyphenyl)-3-methyl-4,5-dihydropyrazol-1-yl) ethanone].

Six solid complexes(TbL3 x 2H2O, TbL2 (phen) x H2O, TbL2 (TPPO), EuL3 x 2H2O, EuL2 (phen) x 2H2O and EuL2 (TPPO) x 2H2O) have been synthesized based on the pyrazole ligand(HL)(phen = 1,10-phenanthroline, TPPO = Tri-phenylphosphine oxide, HL=1-(5-(2-hydroxyphenyl)-3-methyl-4,5-dihydropyrazol-1-yl) ethanone). These complexes were characterized by elemental analysis, IR spectra, and fluorescence spectra. The IR spectra indicated that all complexes exhibited the characteristic peaks of asymmetric stretching vibration v (C=O) and symmetric stretching vibration v (C=N) peaks.

Bis[μ-2-(2,4-difluoro-phen-yl)-1,3-bis-(1H-1,2,4-triazol-1-yl)propan-2-olato]dicopper(II) bis-(perchlorate).

The title complex, [Cu(2)(C(13)H(11)F(2)N(6)O)(2)](ClO(4))(2), which was hydro-thermally synthesized, contains a binuclear copper cluster (2 symmetry) with a Cu(2)O(2) rhombus [Cu-O = 1.927 (2) Å] formed by donation of two O atoms from two chelate rings. The tridentate function of each ligand is completed by two N atoms coordinated to the two Cu(II) atoms [Cu-N = 1.