Category Ranking
98%
Total Visits
921
Avg Visit Duration
2 minutes
Citations
20
Article Abstract
Three diverse supramolecular compounds, {[3-pmpmd]}(1), {H[3-pmpmd]·2NO}(2), {H[3-pmpmd]·2tbb}(3), (where 3-pmpmd was N,N'-bis(3-pyridylmethyl)pyromellitic diimide; tbb was tertiary butyl benzoic acid) were synthesized and characterized by elemental analyses, IR spectroscopy, thermogravimetric analyses, and X-ray single-crystal structure analysis. The co-crystal anions affect their structural diversity. Compound 1 is a 1D stairway chain structure by perpendicular π⋯π interactions of pyromellitic diimide and the neighboring pyridine rings. Compound 2 is a typical 1D ladder chain structure by hydrogen bond of nitrate arranged in a parallel array. Compound 3 is a 1D zigzag chain structure of one 3-pmpmd and two tbb by parallel π⋯π interactions and hydrogen bond interactions. Thermal stabilities and fluorescence properties of all compounds were investigated. The solution of compound 2 in DMF can fluorescence sense for iodide ions by remarkably quenching fluorescence intensity.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.saa.2019.117941 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Implementing a Resource-Light and Low-Code Large Language Model System for Information Extraction from Mammography Reports: A Pilot Study.
J Imaging Inform Med
September 2025
Department of Diagnostic, Interventional and Pediatric Radiology (DIPR), Inselspital, Bern University Hospital and University of Bern, Bern, Switzerland.
Large language models (LLMs) have been successfully used for data extraction from free-text radiology reports. Most current studies were conducted with LLMs accessed via an application programming interface (API). We evaluated the feasibility of using open-source LLMs, deployed on limited local hardware resources for data extraction from free-text mammography reports, using a common data element (CDE)-based structure.
View Article and Find Full Text PDFAgrifood value chain employment and compensation shift with structural transformation.
Nat Food
September 2025
Charles H. Dyson School of Applied Economics and Management, Cornell University, Ithaca, NY, USA.
The traditional structural transformation narrative emphasizes intersectoral labour reallocation out of agriculture, ignoring whether workers exit agrifood value chains or merely migrate within them. Here we decompose multiregional input-output table data into industry- and country-specific annual labour value-added estimates by final consumer market segment, matching them with industry-specific employment data to estimate average worker compensation. Using data covering most of the global economy over 1993-2021, we report ten stylized facts about labour reallocation amid structural transformation.
View Article and Find Full Text PDFStability Testing Reveals Photoselective Clipping of Heavy Chain C-Terminal Amino Acids That Leads to Fragmentation and Aggregation of an Antibody Fab Fragment.
Mol Pharm
September 2025
Department of Biochemical Engineering, University College London, Gower Street, London, WC1E 6BT, U.K.
We built a custom device to subject an antibody fragment A33 Fab to controlled stress conditions that combined pH, temperature, agitation, and LED-based light exposure in polypropylene microplates; to simulate the real-world challenges it may encounter during storage and transportation and to evaluate the key degradation routes in Fab formulations. We also explored the addition of Tween 80 as a surfactant and the impact of plate surface siliconisation. Monomer loss and fragmentation was monitored by size-exclusion chromatography, aggregate formation determined by changes in hydrodynamic radius in DLS, and chemical modifications identified through intact mass analysis by LC-MS, and N-terminal sequencing.
View Article and Find Full Text PDFDaptomycin membrane activity is modulated by the localized interplay between calcium ions and phospholipids in monolayers and bilayers containing a lysyl-phosphatidylglycerol analogue.
Biochim Biophys Acta Biomembr
September 2025
Department of Pharmaceutical Sciences, University of Vienna, Josef-Holaubek-Platz 2, Vienna, Austria.. Electronic address:
Using the stable synthetic analogue 3-aza-dehydroxylysyl-phosphatidylglycerol (3adLPG), the putative role of native staphylococcal LPG in inhibiting the antibiotic daptomycin from binding to its target phosphatidylglycerol (PG), was investigated with respect to interfacial interactions between these lipids, daptomycin, and calcium ions. The influence of lipid monolayer/bilayer composition and interfacial ion concentrations upon the structure and integrity of model membranes were probed after daptomycin challenge using a combination of surface x-ray scattering techniques and fluorescence assays. In models representing the membrane composition of the daptomycin susceptible phenotype consisting of PG/3adLPG in a 7:3 M ratio, calcium ions drive the formation of two separate phases; Ca cross-linked PG/PG pairs and PG/3adLPG ion pairs.
View Article and Find Full Text PDFArtificial nacre based on polydopamine functionalized graphene oxide nanosheets constrained palladium nanocluster with enhanced mechanical properties and catalytical functionalities.
Int J Biol Macromol
September 2025
Research Center of Advanced Catalytic Materials & Functional Molecular Synthesis, Zhejiang Key Laboratory of Alternative Technologies for Fine Chemicals Process, School of Chemistry & Chemical Engineering, Shaoxing University, Shaoxing, 312000, China; Institute of Chemistry, Chinese Academy of Scien
Inspired by "the composition of catechol and amine groups in the adhesive proteins" of marine mussel and "brick-and-mortar" structure of nacre, we use polydopamine (PDA) as "mortar", graphene oxides (GO) nanosheets as "brick", and Pd ions as interfacial reinforcer, to fabricate nacre-like Pd enhanced PDA functionalized GO membranes (Pd@PDA/GO) with vacuum filtration-assisted assembly method. Meanwhile, in situ reduced Pd nanoclusters by PDA chains were well constrained within the resultant Pd@PDA/GO artificial nacre composites. Good interfacial adhesion with dense packing of the GO nanosheets was further confirmed with sub-nano level microstructure characterization by positron annihilation lifetime spectroscopy.
View Article and Find Full Text PDF