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Emission Switching in the Near-Infrared by Reversible Trans-Cis Photoisomerization of Styrylbenzene-Conjugated Osmium Terpyridine Complexes.
Inorg Chem
April 2021
Department of Chemistry, Inorganic Chemistry Section, Jadavpur University,Kolkata 700032, India.
A new array of homoleptic osmium(II) complexes based on styrylbenzene-conjugated terpyridine ligands (tpy-pvp-X) were synthesized and their photophysical, electrochemical, and photoisomerization behaviors thoroughly investigated in this work. Both electron-donating and -withdrawing substituents were incorporated onto a tpy-pvp-X (X = H, Me, Cl, NO, and Ph) moiety to tune the optical properties and also the rate of photoisomerization behaviors in the complexes. All complexes display strong spin-allowed singlet metal-to-ligand charge-transfer bands in the visible (495-506 nm) and weak singlet ground state to triplet metal-to-ligand charge-transfer (MLCT) broad bands within the 600-700 nm range.
View Article and Find Full Text PDFAdsorptive Separation of Geometric Isomers of 2-Butene on Gallate-Based Metal-Organic Frameworks.
ACS Appl Mater Interfaces
February 2020
Key Laboratory of Biomass Chemical Engineering of the Ministry of Education, College of Chemical and Biological Engineering , Zhejiang University, Hangzhou 310027 , People's Republic of China.
The separation of mixed C olefins is a highly energy-intensive operation in the chemical industry due to the close boiling points of the unsaturated C isomers. In particular, the separation of /-2-butene is among the most challenging separation processes for geometric isomers and is of prime importance to increase the added value of C olefins. In this work, we report a series of isostructural gallate-based metal-organic frameworks (MOFs), namely, M-gallate (M = Ni, Mg, Co), featuring oval-shaped pores, that are ideally suitable for shape-selective separation of /-2-butene through their differentiation in minimum molecular cross-section size.
View Article and Find Full Text PDFPhotoswitchable Phase Separation and Oligonucleotide Trafficking in DNA Coacervate Microdroplets.
Angew Chem Int Ed Engl
October 2019
Centre for Protolife Research and Centre for Organized Matter Chemistry, School of Chemistry, University of Bristol, Bristol, BS8 1TS, UK.
Coacervate microdroplets produced by liquid-liquid phase separation have been used as synthetic protocells that mimic the dynamical organization of membrane-free organelles in living systems. Achieving spatiotemporal control over droplet condensation and disassembly remains challenging. Herein, we describe the formation and photoswitchable behavior of light-responsive coacervate droplets prepared from mixtures of double-stranded DNA and an azobenzene cation.
View Article and Find Full Text PDF3-Fluoro-4-hydroxyprolines: Synthesis, Conformational Analysis, and Stereoselective Recognition by the VHL E3 Ubiquitin Ligase for Targeted Protein Degradation.
J Am Chem Soc
July 2018
Division of Biological Chemistry and Drug Discovery, School of Life Sciences , University of Dundee , James Black Centre, Dow Street , Dundee DD1 5EH , Scotland, U.K.
Hydroxylation and fluorination of proline alters the pyrrolidine ring pucker and the trans:cis amide bond ratio in a stereochemistry-dependent fashion, affecting molecular recognition of proline-containing molecules by biological systems. While hydroxyprolines and fluoroprolines are common motifs in medicinal and biological chemistry, the synthesis and molecular properties of prolines containing both modifications, i.e.
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