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Photoluminescence Switching in Quantum Dots Connected with Carboxylic Acid and Thiocarboxylic Acid End-Group Diarylethene Molecules.
J Phys Chem C Nanomater Interfaces
December 2024
Department of Chemical Engineering, University of Virginia, Charlottesville, Virginia 22904, United States.
We contrast the switching of photoluminescence (PL) of PbS quantum dots (QDs) cross-linked with photochromic diarylethene molecules with different end groups, 4,4'-(1-cyclopentene-1,2-diyl)bis[5-methyl-2-thiophenecarboxylic acid] () and 4,4'-(1-cyclopentene-1,2-diyl)bis[5-methyl-2-thiophenethiocarboxylic acid] (). Our results show that the QDs cross-linked with the carboxylic acid end group molecules () exhibit a greater amount of switching in photoluminescence intensity compared to QDs cross-linked with the thiocarboxylic acid end group (). We also demonstrate that regardless of the molecule used, greater switching amounts are observed for smaller quantum dots.
View Article and Find Full Text PDFBlue-/near-infrared light-triggered photochromism in a reinforced acceptor-acceptor type dithienylethene with aggregation-induced emission.
Spectrochim Acta A Mol Biomol Spectrosc
March 2025
Luoyang Key Laboratory of Organic Functional Molecules, College of Food and Drug, College of Chemistry and Chemical Engineering, Luoyang Normal University, Luoyang 471934, PR China. Electronic address:
The development of photochromic dithienylethene (DTE) derivatives activated by visible light, particularly those exhibiting aggregation-induced emission (AIE) properties, is highly sought after for applications in photoelectric functional materials and biological systems. In this study, we rationally designed and successfully synthesized a novel cyanostilbene- and nitro-functionalized DTE derivative (6) featuring a reinforced acceptor (A)-DTE-acceptor (A) structural motif. Each of the two cyanostilbene fragments bearing nitrobenzene groups imparts both electron-withdrawing effects and AIE characteristics, thereby ensuring efficient visible light-driven photochromic performance.
View Article and Find Full Text PDFCombined Photopolymerization and Localized Photochromism by Aza-Diarylethene and Hemiindigo Synergy.
Adv Mater
November 2024
Friedrich-Alexander-Universität Erlangen-Nürnberg, Department of Chemistry and Pharmacy, Nikolaus-Fiebiger-Str. 10, 91058, Erlangen, Germany.
Molecular photoswitches produce light-controlled changes at the nanometer scale and can therefore be used to alter the states and behavior of materials in a truly bottom-up fashion. Here an escalating photonic complexity of material property control with light is shown using a recently developed aza-diarylethene in combination with hemiindigo (HI) photoswitches. First, aza-diarylethene can be used as a photoswitch in polystyrene (PS) to reversibly inscribe relief-type 3D structures into PS.
View Article and Find Full Text PDFFabrication and Characterization of Co-Sensitized Dye Solar Cells Using Energy Transfer from Spiropyran Derivatives to SQ2 Dye.
Molecules
October 2024
Department of Applied Science and Engineering, Fukui University of Technology, Fukui 910-8505, Japan.
We developed dye-sensitized solar cells (DSSCs) using 1,5-carboxy-2-[[3-[(2,3-dihydro-1,1-dimethyl-3-ethyl-1H-benzo[e]indol-2-ylidene)methyl]-2-hydroxy-4-oxo-2-cyclobuten-1-ylidene]methyl]-3,3-dimethyl-1-octyl-3H-indolium and 1,3,3-trimethyl indolino-6'-nitrobenzopyrylospiran. The DSSCs incorporate photochromic molecules to regulate photoelectric conversion properties. We irradiated photoelectrodes adsorbed with SQ2/SPNO using both UV and visible light and observed the color changes in these photoelectrodes.
View Article and Find Full Text PDFSecond Generation Zwitterionic Aza-Diarylethene: Photoreversible CN Bond Formation, Three-State Photoswitching, Thermal Energy Release, and Facile Photoinitiation of Polymerization.
Angew Chem Int Ed Engl
October 2024
Friedrich-Alexander-Universität Erlangen-Nürnberg, Department of Chemistry and Pharmacy, Nikolaus-Fiebiger-Str. 10, 91058, Erlangen, Germany.
Diarylethenes are a well-studied and optimized class of photoswitches with a wide range of applications, including data storage, smart materials, or photocontrolled catalysis and biological processes. Most recently, aza-diarylethenes have been developed in which carbon-carbon bond connections are replaced by carbon-nitrogen connections. This structural elaboration opens up an entire new structure and property space expanding the versatility and applicability of diarylethenes.
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