Present review is focused on recent experimental and computational advances of the liquid-phase deuterium nuclear magnetic resonance (NMR). Nowadays, isotropic liquid-phase H NMR became one of the most important instruments for the identification and certification of organic compounds of biological interest together with natural products and biosynthetic molecules. Of special interest are the H NMR biochemical and microbiological applications. This review consists of three main parts. The first part deals with the practical applications of H NMR to organic compounds of biological interest. The second part is connected with natural products and biosynthetic molecules, while the third part exemplifies and outlines H NMR advances in biochemistry and microbiology.
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http://dx.doi.org/10.1002/mrc.5374 | DOI Listing |
ACS Appl Mater Interfaces
January 2025
Key Laboratory of Colloid and Interface Chemistry of the Ministry of Education, School of Chemistry and Chemical Engineering, Shandong University, Jinan, Shandong 250100, China.
Coacervation based on liquid-liquid phase separation (LLPS) has been widely used for the preparation of artificial protocells and to mimic the dynamic organization of membrane-free organelles. Most complex synthetic coacervates are formed through electrostatic interactions but cannot withstand high ionic strength conditions (>0.1 M).
View Article and Find Full Text PDFJ Phys Condens Matter
December 2024
Department of Allied Science, Graphic Era University, Dehradun 248002, India.
An anomalous Raman phenomenon (ARP) refers to a scenario in which the Stokes and anti-Stokes frequencies of a Raman mode are different. Here we report that ARP introduces different line shifts in Stokes and anti-Stokes frequencies in 4-Decyloxy Benzoic acid with temperature across two thermally driven structural transitions: the smectic (S) to nematic (N) phase transition at 375 K and the nematic (N) to isotropic (I) transition at 390 K. Four Raman modes near 663, 773, 1128, and 1168 cmshift towards higher frequencies (blueshift) in the Stokes frequency and towards lower frequencies (redshift) in the anti-Stokes frequency with rise in temperature near S to N phase transitions.
View Article and Find Full Text PDFPhys Rev Lett
October 2024
Institute for Theoretical Physics, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands.
Simulating strongly correlated systems with incommensurate order poses significant challenges for traditional finite-size-based approaches. Confining such a phase to a finite-size geometry can induce spurious frustration, with spin spirals in frustrated magnets being a typical example. Here, we introduce an Ansatz based on infinite projected entangled-pair states which overcomes these limitations and enables the direct search for the optimal spiral in the thermodynamic limit, with a computational cost that is independent of the spiral's wavelength.
View Article and Find Full Text PDFProc Natl Acad Sci U S A
September 2024
Department of Chemical and Biomolecular Engineering, University of Pennsylvania, Philadelphia, PA 19104.
Liquid-liquid phase separation, whereby two liquids spontaneously demix, is ubiquitous in industrial, environmental, and biological processes. While isotropic fluids are known to condense into spherical droplets in the binodal region, these dynamics are poorly understood for structured fluids. Here, we report the unique observation of condensate networks, which spontaneously assemble during the demixing of a mesogen from a solvent.
View Article and Find Full Text PDFJ Am Chem Soc
April 2024
Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States.
The growth of superlattices (SLs) made from self-assembled nanocrystals (NCs) is a powerful method for creating new materials and gaining insight into fundamental molecular dynamics. Previous explorations of NCSL syntheses have mostly compared them to crystallization. However, NCSL synthesis has not broadly shown cooling crystallization from saturated solutions as a reversible crystallization-dissolution process.
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