|(C₄NH₁₂)₄|[M₄Al₁₂P₁₆O₆₄] (M = Co, Zn): New Heteroatom-Containing Aluminophosphate Molecular Sieves with Two Intersecting 8-Ring Channels

Two novel heteroatom-containing aluminophosphate molecular sieves, |(C₄NH₁₂)₄|[M₄Al₁₂P₁₆O₆₄] (denoted MAPO-CJ69, M = Co and Zn), have been solvothermally synthesized using diethylamine as the structure-directing agent. The framework of MAPO-CJ69 exhibits a new zeolite topology which is constructed by strict alternation of metal-centered (Al/M)­O₄ tetrahedra and PO₄ tetrahedra to form a three-dimensional anionic [M₄Al₁₂(PO₄)₁₆]^4– framework. The structure contains two intersecting 8-ring channels along the [010] and [001] directions, and the protonated diethylamine cations reside in the 8-ring channels to achieve charge neutrality. The structure of MAPO-CJ69 is composed of the 4-4- secondary building unit (SBU), which has been found in some known zeolites, such as AFR, SFO, ZON, OWE, etc. The structural relationships between these zeolites have been discussed

PRISMA flow diagram showing the study selection process.

PRISMA flow diagram showing the study selection process.</p

|(C₄NH₁₂)₄|[M₄Al₁₂P₁₆O₆₄] (M = Co, Zn): New Heteroatom-Containing Aluminophosphate Molecular Sieves with Two Intersecting 8-Ring Channels

Two novel heteroatom-containing aluminophosphate molecular sieves, |(C₄NH₁₂)₄|[M₄Al₁₂P₁₆O₆₄] (denoted MAPO-CJ69, M = Co and Zn), have been solvothermally synthesized using diethylamine as the structure-directing agent. The framework of MAPO-CJ69 exhibits a new zeolite topology which is constructed by strict alternation of metal-centered (Al/M)­O₄ tetrahedra and PO₄ tetrahedra to form a three-dimensional anionic [M₄Al₁₂(PO₄)₁₆]^4– framework. The structure contains two intersecting 8-ring channels along the [010] and [001] directions, and the protonated diethylamine cations reside in the 8-ring channels to achieve charge neutrality. The structure of MAPO-CJ69 is composed of the 4-4- secondary building unit (SBU), which has been found in some known zeolites, such as AFR, SFO, ZON, OWE, etc. The structural relationships between these zeolites have been discussed

Search strategy for PubMed.

BackgroundSchizophrenia is a chronic persistent disease with high recurrence rate and high disability rate in the field of psychiatry. Sodium nitroprusside is a nitric oxide (NO) donor and considered a promising new compound for the treatment of schizophrenia. New high-quality clinical trials of sodium nitroprusside in the treatment of schizophrenia have been published in recent years. It is necessary to re-conduct the meta-analysis after the inclusion of these new clinical trials. Our study will conduct a systematic review and meta-analysis of the relevant literature in this field, so as to lay an evidence-based medicine foundation for the efficacy of sodium nitroprusside in the treatment of schizophrenia.Methods and analysisRandomized controlled trials (RCTs) of sodium nitroprusside in the treatment of schizophrenia were searched through English databases (PubMed, Web of Science, Embase, and Cochrane Library) and Chinese databases (China Biology Medicine disc, VIP, WanFang Data, and CNKI). The extracted data will be inputted into Review Manager 5.3 for Meta-analysis. The included literature will be assessed for bias risk according to the bias risk assessment tools in the Cochrane Handbook for Systematic Reviews of Interventions. Funnel plots will be used to assess possible publication bias. Heterogeneity is tested by I2 and χ2 tests, and the existence of heterogeneity is defined as I2 ≥50% and P ≤0.1. If heterogeneity exists, the random-effect model will be used, and sensitivity analysis or subgroup analysis will be performed to further determine the source of heterogeneity.Prospero registration numberCRD42022341681.</div

PRISMA-P (Preferred Reporting Items for Systematic review and Meta-Analysis Protocols) 2015 checklist: Recommended items to address in a systematic review protocol*.

PRISMA-P (Preferred Reporting Items for Systematic review and Meta-Analysis Protocols) 2015 checklist: Recommended items to address in a systematic review protocol*.</p

Dry Gel Conversion Method for the Synthesis of Organic–Inorganic Hybrid MOR Zeolites with Modifiable Catalytic Activities

Dry gel conversion (DGC) technique is first applied in the synthesis of organic–inorganic hybrid aluminosilicate zeolites. By using the DGC method, methylene-bridged organic–inorganic hybrid zeolites with an MOR topology are synthesized without organic additive, which are structurally characterized by powder XRD, FTIR, solid-state ²⁹Si, ¹³C, ²⁷Al MAS NMR, SEM, elemental analysis, XRF, XPS, and N₂ adsorption techniques. This work first reports that thus-synthesized methylene-bridged hybrid zeolites can be successfully bestowed with excellent catalytic activities through different modification treatments. Co²⁺-exchanged hybrid zeolites are applied in the epoxidation of alkenes with air to achieve good conversions and selectivities. Especially, methylene-bridged hybrid zeolites can be sulfonated with fuming sulfuric acid to form acidic MOR-SO₃H catalyst, which exhibits highly catalytic activity for the acid-catalyzed condensation reaction of cyclohexanone and glycol. This method will be one potential route for the fabrication of organic–inorganic hybrid zeolite or related molecular sieve catalysts

Fluorescence Thermometers Involving Two Ranges of Temperature: Coordination Polymer and DMSP Embedding

The measurement of temperature is indispensable in the fields of life, science, and industry. Fluorescence thermometers are attractive to researchers because of their advantages such as noncontact, high sensitivity, fast response, and excellent anti-interference. Here, a new coordination polymer (HNU-76) was synthesized by assembling Zn2+ with the H3TCA ligand, a fluorescent molecule with an AIE behavior, which can be used as a fluorescence thermometer. At 100–210 K, the fluorescence intensity ratio of HNU-76 versus temperature conforms to an Arrhenius-type decay relationship (R2 = 0.997), which can be the candidate for low-temperature sensing. In order to increase the sensing range, 4-[4-(dimethylamino)styryl] pyndine (DMSP) was successfully embedded on HNU-76, obtaining HNU-76⊃DMSP. The fluorescence intensity of HNU-76⊃DMSP conforms to an Arrhenius-type decay relationship (R2 = 0.997) at 270–360 K versus temperature. HNU-76 can be used for fluorescence detection at low temperatures, due to the DMSP loading, and HNU-76⊃DMSP can serve as the temperature thermometer in a range of temperatures common. Both materials show good cyclability and have the potential to be used in fluorescence thermometers

Entangled Uranyl Organic Frameworks with (10,3)‑<i>b</i> Topology and Polythreading Network: Structure, Luminescence, and Computational Investigation

Two 3D uranyl organic frameworks (UOFs) with entangled structures, (HPhen)₂[(UO₂)₂L₂]·4.5H₂O (<b>1</b>) and [(UO₂)₃(H₂O)₄L₂]·6H₂O (<b>2</b>), were synthesized using a rigid tripodal linker (4,4′,4″-(phenylsilanetriyl)­tribenzoic acid, H₃L). Compound <b>1</b> represents a 2-fold interpenetrating UOF with the unique (10,3)-<i>b</i> topology. Compound <b>2</b> is composed of three interlocked sets of identical singlet networks and thus exhibits a rare 3D polythreading network with (3,4)-connected topology. These two compounds have been characterized by IR, UV–vis, and photoluminescent spectroscopy. A density functional theory (DFT) study on the model compounds of <b>1</b> and <b>2</b> shows good agreement of structural parameters and UO stretching vibrational frequencies with experimental data. The experimentally measured absorption bands were well reproduced by the time-dependent DFT calculations

Entangled Uranyl Organic Frameworks with (10,3)‑<i>b</i> Topology and Polythreading Network: Structure, Luminescence, and Computational Investigation

Two 3D uranyl organic frameworks (UOFs) with entangled structures, (HPhen)₂[(UO₂)₂L₂]·4.5H₂O (<b>1</b>) and [(UO₂)₃(H₂O)₄L₂]·6H₂O (<b>2</b>), were synthesized using a rigid tripodal linker (4,4′,4″-(phenylsilanetriyl)­tribenzoic acid, H₃L). Compound <b>1</b> represents a 2-fold interpenetrating UOF with the unique (10,3)-<i>b</i> topology. Compound <b>2</b> is composed of three interlocked sets of identical singlet networks and thus exhibits a rare 3D polythreading network with (3,4)-connected topology. These two compounds have been characterized by IR, UV–vis, and photoluminescent spectroscopy. A density functional theory (DFT) study on the model compounds of <b>1</b> and <b>2</b> shows good agreement of structural parameters and UO stretching vibrational frequencies with experimental data. The experimentally measured absorption bands were well reproduced by the time-dependent DFT calculations

Electrochemical Degradation Mechanism and Thermal Behaviors of the Stored LiNi_0.5Co_0.2Mn_0.3O₂ Cathode Materials

The degradation mechanism of the stored LiNi_0.5Co_0.2Mn_0.3O₂ (NCM523) electrode has been systematically investigated by combining physical and electrochemical tests. After stored at 55 °C and 80% relative humidity for 4 weeks, the NCM523 materials are coated with a layer of impurities containing adsorbed species, Li₂CO₃ and LiOH, resulting in both the weight gains of the materials and the electrochemical performance deterioration of the electrode. The impurities generated in air will react with the electrolyte and instantly turn into Li<i>_x</i>PO<i>_y</i>F<i>_z</i> and other species containing the decomposition products of electrolyte when the stored NCM523 materials are soaked into the electrolyte, causing the charge potential plateau and the impedance to ascend. For the stored NCM523 electrodes, the huge and changeable impedance deteriorates the discharge capacity in the first 10 cycles and the discharge capacity will slowly recover and stabilize within 10 cycles when charging/discharging in 0.1 or 0.2 C. The thermal stability of the stored NCM523 materials get slightly better due to the relatively lower delithiated state after charged to 4.3 V