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This study investigates the relation between the optical and structural properties of poly(3-hexylthiophene) nanoparticles with their efficiency as photocatalysts for the degradation of water pollutants. Two nanoparticle preparation methods were investigated. Our results indicate that nanoparticles prepared by the miniemulsion method are more efficient in inducing photodegradation. The higher crystallinity, observed by X-ray scattering experiments and the presence of surfactant in these nanoparticles affect the photophysical properties. The fluorescence lifetime of miniemulsion nanoparticles is shorter than that of nanoparticles prepared by the flash method, favoring charge transfer towards the surface of the nanoparticle. These charges, in the presence of water, produce highly reactive oxygen species, responsible for the pollutant photodegradation.
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http://dx.doi.org/10.1039/d5nr01699a | DOI Listing |
J Am Chem Soc
September 2025
Dipartimento di Biotecnologie, Chimica e Farmacia, Università di Siena, via A. Moro 2, 53100 Siena, Italy.
Molecules with an inverted singlet-triplet gap (Δ = - < 0) hold potential for optoelectronic applications as OLEDs and photocatalysis. Despite growing interest, no single-molecule emission from a chiral dye with an inverted gap has been reported, and only one case has shown such emission from supramolecular aggregates. Here, we present the first circularly polarized light emission (CPL) from a chiral molecule exhibiting an inverted singlet-triplet gap.
View Article and Find Full Text PDFCommun Chem
September 2025
Dresden Integrated Center for Applied Physics and Photonic Materials (IAPP), Technische Universität Dresden, Dresden, Germany.
Purely organic materials showing efficient and persistent emission via room temperature phosphorescence (RTP) allow the design of minimalistic yet powerful technological solutions for sensing, bioimaging, information storage, and safety applications using the photonic design principle of digital luminescence. Although several promising materials exist, a deep understanding of the underlying structure-property relationship and, thus, development of rational design strategies are widely missing. Some of the best purely organic emitters follow the donor-acceptor-donor design motif.
View Article and Find Full Text PDFACS Nano
September 2025
College of Materials Science and Engineering, Fuzhou University, Fuzhou 350108, China.
Polymorphic two-dimensional (2D) transition metal dichalcogenides (TMDCs) exhibit diverse properties for optoelectronic applications. Here, utilizing phase-engineered MoTe as a prototypical platform, we comprehensively explored its ultrafast and nonlinear optical properties to complete the fundamental framework of phase-dependent optical phenomena in 2D TMDCs. Starting with the phase-selective synthesis of 2H- and 1T'-MoTe with tailored thicknesses, we revealed their distinct photocarrier relaxation mechanisms using intensive power-/temperature-/thickness-dependent transient absorption spectra (TAS).
View Article and Find Full Text PDFSpectrochim Acta A Mol Biomol Spectrosc
September 2025
Laboratorio de Química Inorgánica y Organometálica, Departamento de Química Analítica e Inorgánica, Facultad de Ciencias Químicas, Universidad de Concepción, Edmundo Larenas 129, Casilla 160-C, Concepción, Chile. Electronic address:
The development of multifunctional fluorescent organic materials capable of selective ion detection, subcellular targeting, and logical operations is a burgeoning area in chemical biology and materials science. Herein, we report the design and development of a novel acylhydrazone based fluorescent ligand (HSN·Cl), which exhibits a distinct "turn-on" emission response toward Zn ions and a subsequent "turn-off" response in the presence of sulfide ions (S). The molecular design incorporates structural elements that facilitate the ESIPT feature, conferring the probe with unique photophysical properties.
View Article and Find Full Text PDFOrg Lett
September 2025
Istanbul Technical University, Chemistry Department, Maslak, Istanbul 34469, Turkey.
A donor-acceptor-donor type π-conjugated small molecule, , having an oligoether-functionalized azaisoindigo unit as an acceptor and triphenylamine units as donor groups was designed and synthesized. Its opto-electrochemical properties and charge transport applications were investigated. demonstrated p-type transport behavior with a maximum carrier mobility of 0.
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