Download full-text PDF |
Source |
---|---|
http://dx.doi.org/10.1021/ja077797f | DOI Listing |
Anal Chem
June 2021
Research Center for Analytical Sciences, Department of Chemistry, College of Sciences, Northeastern University, Box 332, Shenyang 110819, China.
Tumor exosomes with molecular marker-proteins inherited from their parent cells have emerged as a promising liquid biopsy biomarker for cancer diagnosis. However, facile, robust, and sensitive detection of exosomal proteins remains challenging. Therefore, a nanozyme sensor array is constructed by using aptamer-modified CN nanosheets (Apt/CN NSs) together with a solvent-mediated signal amplification strategy for ratiometric fluorescence detection of exosomal proteins.
View Article and Find Full Text PDFInorg Chem
August 2020
Department of Chemistry, University of Basel, St. Johanns-Ring 19, Basel CH-4056, Switzerland.
Herein is presented a molecular dyad comprised of a [Ru(bpy)] photosensitizer and an anthraquinone (AQ) acceptor coupled by an ethynyl linker ([Ru(bpy)(bpy-cc-AQ)]) in which activation/deactivation of photoinduced electron-transfer from the [Ru(bpy)] photosensitizer to the AQ acceptor is achieved and characterized as a function of the dielectric constant and hydrogen-bond donating ability of the solvent used. It is demonstrated that the rate of photoinduced electron-transfer can be modulated over several orders of magnitude (10-10 s) by choice of solvent. Nanosecond transient absorption spectra are dominated by MLCT signals and exhibit identical decay kinetics to the corresponding emission signals.
View Article and Find Full Text PDFPhys Chem Chem Phys
January 2020
Science Institute and Faculty of Physical Sciences, University of Iceland, 107 Reykjavík, Iceland.
Copper(i) bis-phenanthroline complexes represent Earth-abundant alternatives to ruthenium-based sensitizers for solar energy conversion and photocatalysis. Improved understanding of the solvent-mediated excited-state structural dynamics can help optimize their photoconversion efficiency. Through direct dynamics simulations in acetonitrile and excited-state minimum energy path calculations in vacuum, we uncover the mechanism of the photoinduced flattening motion of the prototypical system [Cu(dmphen)2]+ (dmphen = 2,9-dimethyl-1,10-phenanthroline).
View Article and Find Full Text PDFJ Phys Chem A
August 2016
Chemistry Department, University of Pittsburgh, Pittsburgh Pennsylvania 15260, United States.
Photoinduced electron transfer is used to investigate the solvent-mediated electron tunneling between electron donor and acceptor groups in polar solvents. Bis-peptide scaffolds are used to control the spatial positioning of electron donor and acceptor groups and create a molecular cleft. The photoinduced electron transfer is studied for two different cleft sizes, and the electronic coupling is found to be controlled by the nature of the solvent and the ability of the molecular cleft to accommodate it, as well as interact directly with it.
View Article and Find Full Text PDFJ Phys Chem A
January 2009
Graduate School of Science and Technology, Shizuoka University, Shizuoka, Japan.
The triplet state radical-ion pair (RIP) formed in the photolysis of xanthone (Xn) and N,N-diethylaniline (DEA) in a highly viscous mixtures of 2-propanol and cyclohexanol was studied by time-resolved ESR. As the viscosity of the mixed solution increases, the spectrum reveals a magnetic dipole-dipole interaction in the triplet state of the RIP. Immediately after laser photolysis, the spin-polarized RIP spectrum exhibits magnetophotoselection (MPS).
View Article and Find Full Text PDFEnter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!