2D hybrid organic-inorganic perovskites (HOIPs) have great prospects in new-generation photovoltaic and luminescence applications. The complex interaction between exciton and lattice motions plays an important role in determining the exciton properties of 2D HOIPs. However, the exploration of the regulation mechanism of phonons and the exciton-phonon (ex-ph) interaction is still very limited, especially for Dion-Jacobson (DJ) type 2D HOIPs.
View Article and Find Full Text PDFPhys Chem Chem Phys
November 2024
The triplet excited states of molecules play an important role in photophysical processes, which has attracted great research interest. Perylene diimide (PDI) is a widely studied material closely associated with the generation of triplet states, and it is highly anticipated to become an electron acceptor material for improving photovoltaic conversion efficiency. In this work, we prepared dimers and tetramers composed of selenium-modified PDI-C5 ('-bis(6-undecyl) perylene-3,4,9,10-bis(dicarboximide)) units.
View Article and Find Full Text PDFJ Colloid Interface Sci
January 2025
The development of a new system for the electrochemical carbon dioxide reduction reaction (ECORR) to methane (CH) is challenging, and novel conductive metal organic frameworks (c-MOFs) for efficient ECORR to CH are critical to this system. Here, we report a novel c-MOF, copper-pyromellitic dianhydride-2-methylbenzimidazole (Cu-PD-2-MBI), in which the introduction of electron-withdrawing 2-methylbenzimidazole (2-MBI) into the copper-pyromellitic dianhydride (Cu-PD) interlayer elevated the valence of copper (Cu) ions, which improved the ECORR performance of Cu-PD-2-MBI. Cu-PD-2-MBI was tested in a flow cell, and the Faradaic efficiency of CH reached 73.
View Article and Find Full Text PDFSinglet fission (SF) is a triplet generation mechanism capable of turning a singlet exciton into two triplet excitons. It has the potential to enhance the power conversion efficiency of single-junction solar cells. Perylene diimides (PDIs) are a class of dye molecules with photovoltaic properties and are beginning to receive more and more attention due to their potential for SF.
View Article and Find Full Text PDFThe kinetics of electrocatalytic reactions are closely related to the number and intrinsic activity of the active sites. Open active sites offer easy access to the substrate and allow for efficient desorption and diffusion of reaction products without significant hindrance. Metal-organic frameworks (MOFs) with open active sites show great potential in this context.
View Article and Find Full Text PDFIn Arabidopsis and rice, the glycosyltransferase (GT) 43 family is involved in xylan synthesis. However, there have been limited reports on the study of the TaGT43 family in wheat. In this study, 28 TaGT43 family members were identified in wheat (Triticum aestivum L.
View Article and Find Full Text PDFEnzyme-mimetic photocatalysis has been attracting much attention in bionic research, in which carbon monoxide dehydrogenase (CODH) is a suitable prototype for simulation to meet environmental and energy needs. In this study, we utilized the structural memory effect of layered double hydroxides (LDHs) to build inorganic intergrowth bulk heterojunctions (IIBHs) NiS/FeS@MgFe-LDHs a pyrolytic topological vulcanization (PTV) method that imitated active C-clusters [Ni-4Fe-4S] in CODH. Enzyme mimicry was evaluated in terms of the microstructure and catalytic reaction site.
View Article and Find Full Text PDFAngew Chem Int Ed Engl
January 2024
The blend nanomorphology of electron-donor (D) and -acceptor (A) materials is of vital importance to achieving highly efficient organic solar cells. Exogenous additives especially aromatic additives are always needed to further optimize the nanomorphology of blend films, which is hardly compatible with industrial manufacture. Herein, we proposed a unique approach to meticulously modulate the aggregation behavior of NFAs in both crystal and thin film nanomorphology via self-regulation effect.
View Article and Find Full Text PDFThe role of aquatic organisms in the biological fragmentation of microplastics and their contribution to global nanoplastic pollution are poorly understood. Here we present a biological fragmentation pathway that generates nanoplastics during the ingestion of microplastics by rotifers, a commonly found and globally distributed surface water zooplankton relevant for nutrient recycling. Both marine and freshwater rotifers could rapidly grind polystyrene, polyethylene and photo-aged microplastics, thus releasing smaller particulates during ingestion.
View Article and Find Full Text PDFThe nonradiative energy loss (∆E) is a critical factor to limit the efficiency of organic solar cells. Generally, strong electron-phonon coupling induced by molecular motion generates fast nonradiative decay and causes high ∆E. How to restrict molecular motion and achieve a low ∆E is a sticking point.
View Article and Find Full Text PDFNanoplastics induce transgenerational toxicity to aquatic organisms, but the specific pathways for the maternal transfer of nanoplastics remain unclear. Herein, laser scanning confocal microscopy (LSCM) observations identified the specific pathways on the maternal transfer of polystyrene (PS) nanoplastics (25 nm) in . and experiments showed that PS nanoplastics could enter the brood chamber through its opening and then be internalized to eggs and embryos using LSCM imaging (pathway I).
View Article and Find Full Text PDFBackground: There is a paucity of systematic reviews on the associated factors of mortality among ST-elevation myocardial infarction (STEMI) patients after percutaneous coronary intervention (PCI). This meta-analysis was designed to synthesize available evidence on the prevalence and associated factors of mortality after PCI for adult patients with STEMI.
Materials And Methods: Databases including the Cochrane Library, PubMed, Web of Science, Embase, Ovid, Scopus, ProQuest, MEDLINE, and CINAHL Complete were searched systematically to identify relevant articles published from January 2008 to March 2020 on factors affecting mortality after PCI in STEMI patients.
Transfer of CeO engineered nanoparticles (NPs) through feces was investigated between two omnivorous organisms, red crucian carp (Carassius auratus red var.) and crayfish (Procambarus clarkii). Upon water exposure (5 mg/L, 7 days), the highest bioaccumulation was observed in carp gills (5.
View Article and Find Full Text PDFObjective: To investigate the epidemiology and influencing factors of social participation ability of rural older adults in China.
Methods: From March to April 2021, 3450 older adults in poverty aged 60 and above registered in Jishishan County (J County) were selected by cluster sampling for a cross-sectional questionnaire survey and their social participation ability was assessed using the Ability Assessment of older adults (MZ/T039-2013). The results were statistically analyzed and an ordered multi-category logistic regression analysis was used to analyze the effect of influencing factors on the social participation ability of rural older adults.
Poly[(2,6-(4,8-bis(5-(2-ethylhexyl)thiophen-2-yl)benzo[1,2-:4,5-']dithiophene)--(1,3-di(5-thiophene-2-yl)-5,7-bis (2-ethylhexyl)benzo[1,2-:4,5-']dithiophene-4,8-dione)] (PBDB-T) is a donor-acceptor copolymer widely used as a donor material in high-efficiency organic solar cells. In this work, we studied the temperature-dependent aggregation properties of PBDB-T in solution. Through the characterization of UV-vis absorption and the photoluminescence spectrum, we found that PBDB-T formed strong interchain interactions that facilitate aggregation at room temperature.
View Article and Find Full Text PDFBackground: Stroke is an acute cerebrovascular event closely related to brain tissue damage, and is one of the major causes of death and disability in worldwide. Various studies have reported the effects of body mass index (BMI) on the risk of stroke, but the results remain varied and these results have not been synthesized. Therefore, a meta-analysis was performed to evaluate the relationship between BMI and the risk of stroke.
View Article and Find Full Text PDFUltrathin two-dimensional metal-organic frameworks (2D MOFs) have the potential to improve the oxidation of benzyl alcohol (BA) with a large surface area and open catalytic active sites. To achieve high-efficiency electrocatalysts for the oxidation of benzyl alcohol, a moderate solvothermal method was evolved to synthesize a series of 2D MOFs on nickel foam (Ni-MOF/NF, NiCo-61-MOF/NF, NiCo-21-MOF/NF). As the electrocatalyst used for the oxidation of benzyl alcohol, NiCo-61-MOF/NF presented a lower overpotential and superior chemical durability than other electrocatalysts; it only required a potential of ∼1.
View Article and Find Full Text PDFBackground And Purpose: Alzheimer's disease (AD) is a devastating neurodegenerative disorder with no cure, and available treatments are only able to postpone the progression of the disease. Mild cognitive impairment (MCI) is considered to be a transitional stage preceding AD. Therefore, prediction models for conversion from MCI to AD are desperately required.
View Article and Find Full Text PDFThe H + H reaction and its isotopic variants as the simplest triatomic ion-molecule reactive system have been attracting much interests, however there are few studies on the titled reaction at state-to-state level until recent years. In this work, accurate state-to-state quantum dynamics studies of the titled reaction have been carried out by a reactant Jacobi coordinate-based time-dependent wave packet approach on diabatic potential energy surfaces constructed by Kamisaka et al. Product ro-vibrational state-resolved information has been calculated for collision energies up to 0.
View Article and Find Full Text PDFTo conduct the first comprehensive analysis of Shigella flexneri serotype 4s, a novel serotype found in 2010, we identified 24 serotype 4s isolates from 1973 shigellosis cases in China (2002-2014). The isolates were characterized by single nucleotide polymorphism (SNP) phylogenetic analysis, pulsed-field gel electrophoresis (PFGE) and multilocus sequence typing (MLST) to determine their genetic relatedness, and analysed further for their antimicrobial susceptibilities and antimicrobial resistance determinants. The PFGE and SNP phylogenetic analyses suggest that S.
View Article and Find Full Text PDFCurr Comput Aided Drug Des
September 2016
Small natural or synthetic peptides have been reported to exhibit potent inhibitory capability against trypsin, some of which were also found to have antibacterial potency. Here, we described a successful application of in silico-in vitro integrated approach to rationally design and optimize bifunctional peptides with both trypsin inhibitory and antimicrobial activities. In the procedure, computer-aided methods including protein docking, peptide redocking, molecular dynamics simulations and binding free energy calculations were employed to model and analyze the intermolecular interaction between human trypsin (hT) and natural trypsin inhibitors (TIs).
View Article and Find Full Text PDFDiagn Microbiol Infect Dis
December 2015
Shigella sonnei has become predominant species causing shigellosis in Shanghai. Two hundred ninety-three S. sonnei were isolated in sentinel hospitals of Shanghai in 2011.
View Article and Find Full Text PDFClustered, regularly interspaced, short palindromic repeats (CRISPR) act as an adaptive RNA-mediated immune mechanism in bacteria. They can also be used for identification and evolutionary studies based on polymorphisms within the CRISPR locus. We amplified and analyzed 6 CRISPR loci from 237 Shigella strains belonging to the 4 species groups, as well as 13 Escherichia coli strains.
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