Reversible encapsulation allows the direct observation of the isolated molecules under ambient conditions, at equilibrium and in the liquid phase. Here we show that capsules can amplify and stabilize molecules that are present in only trace concentrations in solution. Evidence is given that reversible chemical reactions take place within the capsule. Stabilization of reaction intermediates is a characteristic property of enzymes and is widely regarded as an essential feature of catalytic activity. Reactive molecules can also be stabilized by encapsulation, a process that involves completely surrounding the reactive species within synthetic receptors. Here, we show that self-assembled capsules can isolate and stabilize molecules that are present in only trace amounts in solution. The system amplifies the concentrations of high-energy species with reduced entropies.
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http://dx.doi.org/10.1021/ja062768a | DOI Listing |
Acta Crystallogr E Crystallogr Commun
January 2025
A novel coordination compound, [Co()(HO)], was synthesized from aqueous solutions of Co(NO) and the ligand 2-[(5-methyl-1,3,4-thia-diazol-2-yl)sulfan-yl]acetic acid (H, CHNOS). In the monoclinic crystals (space group 2/), the cobalt(II) ion is located about a centre of symmetry and is octa-hedrally coordinated by two anions in a monodentate fashion through carboxyl O atoms and by four water mol-ecules. A relatively strong hydrogen bond between one of the water mol-ecules and the non-coordinating carboxyl-ate O atom consolidates the conformation.
View Article and Find Full Text PDFFront Mol Neurosci
December 2024
Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, IN, United States.
The 90 kDa Heat shock protein (Hsp90) is a family of ubiquitously expressed molecular chaperones responsible for the stabilization and maturation of >400 client proteins. Hsp90 exhibits dramatic conformational changes to accomplish this, which are regulated by partner proteins termed co-chaperones. One of these co-chaperones is called the activator or Hsp90 ATPase activity homolog 1 (Aha1) and is the most potent accelerator of Hsp90 ATPase activity.
View Article and Find Full Text PDFJ Fluoresc
January 2025
College of Chemistry and Materials Science, The Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Laboratory of Molecule-Based Materials, Anhui Normal University, Wuhu, 241000, China.
The identification of ClO and iron ions in water medium is a difficult task and has been one of the hot issues in analytical chemistry. For this objective, we synthesized carbon nanoparticles (CNPs) through a solvothermal reaction between 1, 3, 5-trimesic acid and o-phenylenediamine, which served as a sequential fluorescent probe for ClO and Fe ions. The obtained CNPs were spherical particles with a diameter of 26.
View Article and Find Full Text PDFOleanolic acid (OA) is a pentacyclic triterpenoid molecule widely distributed throughout medicinal plants. This naturally occurring OA has attracted considerable interest due to its wide range of pharmacological characteristics, notably its cytotoxic effects on various human cancer cell lines, making it a potential candidate for extensive therapeutic uses. In vivo studies have shown that OA possesses hepatoprotective, cardioprotective, anti-inflammatory and anti-microbial properties.
View Article and Find Full Text PDFChemistry
January 2025
Fujian Normal University, School of Chemistry and Materials, No.8 Shangsan Road, ., Fuzhou City, CHINA.
The advancement of high-value CH4 purification technology within the natural gas industry is paramount for industrial processes. Herein, we constructed ZJNU-402, a new porous material characterized by permanent porosity, as an effective adsorbent for separating C3H8/CH4 and C2H6/CH4 mixtures. The findings reveal an outstanding C3H8 adsorption capacity of 68 cm3 g-1 and a moderate C2H6 adsorption rate of 42 cm3 g-1, with a notably lower CH4 adsorption rate of 11 cm3 g-1.
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