A nano confinement strategy is presented to control the spatial orientation and emission polarization of phosphorescent metal complexes. Through nano-confinement of the phosphorescent metal complex [Ru(bpy)3 ](2+) by attaching it to anionic clay nanoplatelets, it is possible to simultaneously lock the spatial orientation of the complex and fix its emission polarization. This quasi-epitaxial approach may provide a future work strategy directed at light emitting diodes and lasers.
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http://dx.doi.org/10.1002/smll.201400826 | DOI Listing |
Luminescence
January 2025
College of Environmental Science and Engineering, Guilin University of Technology, Guilin, China.
It is of great significance to develop sensors for trace pesticide residues detection in food. Herein, an electrochemiluminescence (ECL) sensor with high sensitivity for the detection of methyl parathion (MP) was constructed by combining of the acetylcholinesterase (AChE) enzyme-inhibited reaction with tris-2,2'-bipyridyl ruthenium Ru(bpy) -triethylamine (TEA) system for the first time. A new ECL probe of MIL-100 loaded with Ru(bpy) (Ru-MIL-100) was synthesized, and then Ru-MIL-100 and AChE were immobilized on the electrode with Nafion.
View Article and Find Full Text PDFAngew Chem Int Ed Engl
January 2025
Queensland University of Technology, School of Chemistry and Physics, 2 George Street, 4000, Brisbane, AUSTRALIA.
We demonstrate that single-chain nanoparticles (SCNPs) - compact covalently folded single polymer chains - can increase photocatalytic performance of an embedded catalytic center, compared to the comparable catalytic system in free solution. In particular, we demonstrate that the degree of compaction allows to finely tailor the catalytic activity, thus evidencing that molecular confinement is a key factor in controlling photocatalysis. Specifically, we decorate a linear parent polymer with both photoreactive chalcone moieties as well as Ru(bpy)3 catalytic centers.
View Article and Find Full Text PDFAngew Chem Int Ed Engl
December 2024
Department of Chemistry, Shanghai Stomatological Hospital, State Key Laboratory of Molecular Engineering of Polymers, Fudan University, Shanghai, 200433, P. R. China.
Electrochemiluminescence (ECL) microscopy has emerged as a powerful technique for single-cell imaging owing to its unparalleled background-free imaging advantages. However, controlled intracellular ECL imaging remains challenging. Here, we developed a stimuli-responsive self-assembled DNA nanomachine that enables the ECL imaging of intracellular target biomolecules in single cells.
View Article and Find Full Text PDFInorg Chem
December 2024
School of Sciences, Xi'an Technological University, Xi'an 710021, P. R. China.
Metal-organic frameworks (MOFs) with adjustable structures, diverse chemical functionalities, and excellent CO capture ability have shown important potential application in the photocatalytic reduction of CO to valuable fuel to curb the energy crisis. In this work, a series of new isostructural lanthanide-organic frameworks based on hexanuclear {LnO} clusters, {(DMA) [Ln(μ-OH)(HO)(SBTC)]} (Ln-MOFs, Ln = Eu, Dy, Gd, Tb, Yb; HSBTC = 5,5'-(ethene-1,2-diyl) di-isophthalic acid; DMA = dimethylamine cation) were synthesized by the solvothermal method. Ln-MOFs were metal-organic frameworks formed by {Ln(μ-OH)} clusters and poly(carboxylic acid) ligands HSBTC, which exhibited excellent photocatalytic properties for the reduction of CO to CO.
View Article and Find Full Text PDFAngew Chem Int Ed Engl
December 2024
Electrodics and Electrocatalysis Division, CSIR-Central Electrochemical Research Institute (CSIR-CECRI), Karaikudi, Tamil Nadu, 630003, India.
Electrochemiluminescence (ECL) of the conventional system of [Ru(bpy)] luminophore and amine-based coreactants is particularly inefficient on noble metal electrodes. This is due to the formation of a passivating oxide layer on the metal surface inhibiting the electro-oxidation of amines like tri-n-propylamine (TPrA) coreactant. Herein, we demonstrated the enhancement of ECL emission on gold surface by hydroxyl radicals attack that are chemically generated with Cu-Fenton reagent.
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