Characteristic Polyphenols in 15 Varieties of Chinese Jujubes Based on Metabolomics.

Background: Jujube is a homologous herb of medicine and food, and polyphenols are key in determining the functional effects of jujubes.

Methods: In this study, characteristic polyphenols in 15 varieties of Chinese jujubes were investigated based on untargeted metabolomics.

Results: The results showed that a total of 79 characteristic polyphenols were identified in the 15 varieties of Chinese jujube, and 55 characteristic polyphenols such as syringetin, spinosin and kaempferol were reported for the first time.

Sub--benziporphyrin: a subcarbaporphyrinoid and its B complex with an unprecedented planar tridentate 14π-aromatic network.

Sub--benziporphyrins were synthesized by Pd-catalyzed cross-coupling of ,'-diboryl--benzitripyrrane with 9,10-bis(1,1-dibromomethylenyl)anthracene. Reaction of sub--benziporphyrin with PhBCl and triethylamine gave its B-phenyl complex as a tetracoordinate nonaromatic B complex. In contrast, the reaction with BBr and triethylamine furnished a neutral B porphyrinoid with a planar and triangular coordination as the first example, in which the -phenylene unit was partially reduced, allowing for the global 14π-aromatic circuit.

Oxidations of (2,2'-Diphenyl)ethylidene-Bridged Porphyrin Dimers.

Oxidation reactions of (2,2'-diphenyl)ethylidene-bridged porphyrin dimers were examined for the synthesis of (2,2'-diphenyl)ethylidene-inserted porphyrin arch tape dimers. These reactions provided, in addition to the target arch tape dimers, unexpected products such as a bicyclo[3.3.

Durable Photosynthesis of Hydrogen Peroxide Using a Uranyl Coordination Polymer: Exciton Dissociation and Hydrogen Abstraction.

The photosynthesis of hydrogen peroxide (HO), involving water oxidation and oxygen reduction, is crucial for optimizing light utilization. Here, a previously synthesized one-dimensional chain-like semiconductive uranyl coordination polymer (NDC-UCP) was used for the efficient overall photosynthetic reaction of HO and its photocatalytic mechanism was systematically investigated. The excellent stability of NDC-UCP enables continuous HO production for up to 96 h.

Triphyrin(2.1.1) with Tunable Skeletons and Properties Based on the Confusion Approach.

The N-confused [14]triphyrin(2.1.1) was facilely synthesized and readily converted into N-confused triphyrinone(2.

Effect of hot-air drying processing on the volatile organic compounds and maillard precursors of Dictyophora Rubrovalvata based on GC-IMS, HPLC and LC-MS.

The dynamic changes in volatile organic compounds (VOCs), reducing sugars, and amino acids of Dictyophora rubrovalvata (DR) at various drying temperatures were analyzed using GC-IMS, HPLC, and LC-MS. Orthogonal partial least squares discriminant analysis (OPLS-DA) combined with VOCs indicated that drying temperature of 80 °C was optimal. Variable importance in the projection (VIP) and relative odor activity value (ROAV) were employed to identify 22 key VOCs.

Photocatalytic Hydrogen Peroxide Production by a Mixed Ligand-Functionalized Uranyl-Organic Framework.

Hydrogen peroxide (HO) production driven by solar energy has received enormous attention due to its high efficiency, low cost, and environmental friendliness characteristics. Searching for new photocatalytic materials for HO production is one of the most important targets. In this work, a new three-dimensional (3D) uranyl-organic framework material was constructed with mixed ligands via a solvothermal reaction and used for photocatalytic HO production.

Effect of jujube powder addition on the aroma profile of quinoa snacks (QS).

Quinoa is a full-nutrition food; however, its poor flavor and small size make it not the best food option for direct consumption. In this study, a quinoa snack (QS, a cake) was developed, and the aroma profile of the products was improved by adding jujube fruit powder (made from dried jujube fruits, from 5% to 30%). Gas chromatography mass spectrum (GC-MS) combined with electronic nose (e-nose) was applied for characterizing the aroma profiles of QS samples.

The unprecedented strong paratropic ring current of a bis-Pd complex of 5,10,23-trimesityl [28]heptaphyrin(1.1.0.0.1.0.0).

Acid-catalyzed Friedel-Crafts-type cyclization of tetrapyrrolic BF complex 1 and α,α'-dibromotripyrrin 2 gave 5,10,23-trimesityl [28]heptaphyrin(1.1.0.

m-Pyripentaphyrins(1.0.0.0.0): B Complexes and β-β Directly Linked Dimers.

m-Pyripentaphyrins(1.0.0.

Synthesis of Ni porphyrin-Ni 5,15-diazaporphyrin hybrid tapes.

Ni porphyrin (P) and Ni 5,15-diazaporphyrin (DAP) hybrid tapes were synthesized by Suzuki-Miyaura cross-coupling reactions of - or β-borylated P with β-brominated DAP followed by intramolecular oxidative fusion reactions. -β doubly linked hybrid tapes were synthesized by oxidation of singly linked precursors with DDQ-FeCl. Synthesis of triply linked hybrid tapes was achieved by oxidation with DDQ-FeCl-AgOTf with suppression of peripheral β-chlorination.

Fused Aromatic and Antiaromatic Smaragdyrin Dimers.

Singly-linked aromatic [22]smaragdyrin BF complex dimer was synthesized by the reductive coupling of 16-brominated [22]smaragdyrin BF complex, which was oxidized to a stable diradical with PbO. As the first example of fused smaragdyrin dimer, a fused [22]smaragdyrin BF complex dimer was synthesized by the oxidation of a CuCl-BF complex dimer with FeCl and subsequent reduction with NaBH. After removal of the BF group, the singly-linked and fused aromatic dimers were oxidized to the corresponding antiaromatic [20]smaragdyrin free base dimers.

[22]Pentaphyrins(2.0.1.1.0) Displaying N-Fusion, Pyrrole-Rearrangement, and Dimerization Reactions Upon Oxidation and Metalation.

Exploration of expanded porphyrins with unprecedented reactivities has remained important. Here [22]pentaphyrins(2.0.

Robust, Narrow-Band Nanorods LEDs with Luminous Efficacy > 200 lm/W: Next-Generation of Efficient Solid-State Lighting.

Energy-efficient white light-emitting diodes (LEDs) are in high demand across the society. Despite the significant advancements in the modern lighting industry based on solid-state electronics and inorganic phosphor, solid-state lighting (SSL) continues to pursue improved efficiency, saturated color performance, and longer lifetime. Here in this article, robust, narrow emission band nanorods (NRs) are disclosed with tailored wavelengths, aiming to enhance the color rendering index (CRI) and luminous efficacy (LE).

Numerical thermal assessment and theoretical analysis of horizontal-hole interlock composite insulation blocks.

In this paper, the thermal performance of 54 horizontal-hole interlocking composite insulation blocks was numerically analyzed based on the steady-state heat transfer model, the regulations were found, and prediction models for the thermal parameters of the blocks were established based on the parallel network thermal resistance model. The influence of block types and block materials on the thermal performance was studied, and it was found that the thermal performance of H-shaped interlocking insulation blocks was better than that of crossed-shaped ones, and the lower the thermal conductivity of block materials, the better the thermal performance of blocks, among which the reduction of thermal conductivity of concrete materials improved the thermal performance of blocks the most. The simulated values of thermal conductivity of H-shaped interlocking insulation blocks and thermal conductivity under the parallel network thermal resistance model were highly linearly correlated with correlation coefficients as high as 0.

Realization of white-light-emitting diodes from a high-brightness zirconium-based metal-organic gel driven by the AIE effect.

Developing luminescent materials with suitable correlated color temperature (CCT) and sufficient color-rendering index (CRI) is a challenging problem in the field of commercialized warm white LED lighting. Herein, a novel metal-organic gel (MOG) material named YTU-G-1(SE) was synthesized, consisting of zirconium metal coordinated with 1,1,2,2-tetrakis(4-carboxyphenyl) ethylene. YTU-G-1(SE) exhibits strong fluorescent properties with an aggregation-induced emission (AIE) effect, emitting yellow-green fluorescence at 515 nm.

Construction of Porphyrin-Based Bimetallic Nanomaterials with Photocatalytic Properties.

The efficient synthesis of nanosheets containing two metal ions is currently a formidable challenge. Here, we attempted to dope lanthanide-based bimetals into porphyrin-based metal-organic skeleton materials (MOFs) by microwave-assisted heating. The results of the EDX, ICP, and XPS tests show that we have successfully synthesized porphyrin-based lanthanide bimetallic nanosheets (Tb-Eu-TCPP) using a household microwave oven.

B-Subporphyrins Bearing Distorted Metal-Coordinating Straps: Cu-Assisted -Fabrications.

B-subporphyrins , , and possessing metal-coordinating carbaporphyrin-like pockets were synthesized by Suzuki-Miyaura coupling reactions. Compounds and gave Pd complexes and upon metalation with Pd(OAc) but did not give either their Ni or Cu complexes. Conversely, was expected to induce distorted square planar coordination because of its 2,5-di(pyrid-2-yl)pyrrole strap.

Copper(II) Carbaporphyrins: Oxygenation Reactivities Dependent upon Coordinating Structures.

Cu metalations of carbaporphyrins - gave the corresponding Cu complexes , , , and with varying degrees of distortions in Cu square-planar coordination. Upon treatment with Cu(OAc), was inert but and gave the respective O-atom-inserted complexes and . Further, and were converted to -methoxynickel(II) porphyrins and , respectively, via treatment with Cu(OAc) in methanol.

A Triply Linked Porphyrin-Norcorrole Hybrid with Singlet Diradical Character.

Norcorrole Ni(II) complexes have recently received considerable attention because they are readily accessible antiaromatic molecules. Their high stability under ambient conditions and ease of synthesis have enabled the exploration of the intrinsic properties of antiaromatic molecules. Here, we report the synthesis and properties of meso-meso singly linked porphyrin-norcorrole hybrids and a triply linked porphyrin-norcorrole hybrid.

Di(p-dibenzi)[40]decaphyrin(1.0.0.0.0.1.0.0.0.0) Pd Complex: A Weakly Hückel 38π-Aromatic Macrocycle.

Di(p-benzi)[40]decaphyrin(1.0.0.