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Showing 1 to 12 of 12 for “"Squaraine"”.
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Aggregation of Squaraine Dye Derivatives in Solid State Spin-coated Thin Films
Squaraine dyes have been the subject of intensive studies due their unusual electronic properties that make them good candidates for a wide range of applications in various technological fields. They are particularly promising in nonlinear optics, bioimaging for labeling and sensing of …
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Molecular Structure-nonlinear Optical Property Relationships For A Series Of Polymethine And Squaraine Molecules
… (2PA) properties for a series of polymethine and squaraine molecules. Current and emerging applications exploiting the quadratic dependence upon laser intensity, such as two-photon fluorescence imaging, three-dimensional microfabrication, optical data storage and optical limiting, have motivated …
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Synthesis, Linear and Nonlinear Photophysical Characterization of Two Symmetrical Pyrene-terminated Squaraine Derivatives in Solution
Two indole-based squaraine dyes bonded to two pyrenyl groups through vinyl- and ethynyl- linkers were synthesized with the aim of enhancing the intramolecular charge transfer interaction in addition to improving their optical properties. The absorption and emission properties of these derivatives …
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Photoluminescent energy transfer from poly(phenyleneethylene)s to a series of dyes
… donor, and xanthene, cyanine, phenoxazine, and squaraine dyes were utilized as energy acceptors. Energy transfer efficiency was investigated by exciting the polymer and monitoring the quenching of polymer emission, along with the enhanced dye emission. Squaraine dyes exhibited up to 110 times …
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Nanocrystal-molecule energy transfer conjugates for chemical and biological sensing
… pH sensor is synthesized by tethering NCs to a squaraine-based pH dye. The presence of an isosbestic point between the two emission maxima from the NC and the dye allows the sensor to be self-calibrating (Chapter III). The ratiometric nature of the NC-based sensor signifies potential for …
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Light Harvesting using Metal-Organic and Organic Sensitizers in Hybrid Solar Cells: Synthesis, Characterisation and Application
… dye (TPD-dye) absorbing in the blue region and squaraine dye (SQ-dye) mainly absorbing the red part of the visible spectrum. In this way, the optical response of the device was extended up to 700 nm. Under optimized conditions, a conversion efficiency of 2.41 % could be reached. To accomplish …
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Synthesis of Fluorescent Molecules and their Applications as Viscosity Sensors, Metal Ion Indicators, and Near-Infrared Probes
… In Chapter 3, a newly-designed unsymmetrical squaraine dye, SQ3, was synthesized. A one-pot synthesis was employed resulting in a 10% yield, a result that is generally quite favorable for the creation of unsymmetrical squaraines Photophysical and photochemical characterization was conducted in …
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Establishing nanoscopic structure-function relationships in the working electrodes of dye-sensitized solar cells
… explains the distinct optical properties of this squaraine dye. Additionally, desorption experiments reveal a low dye loading of SQ-2 on TiO2. Based on the aforementioned study, DSSCs co-sensitized with RK-1 and SQ-2 were studied using spectral and electrical characterization, with supporting DFT …
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Fluorescence Enhancement Strategies for Polymer Semiconductors
… efficient energy transfer to a more emissive squaraine dye molecule is possible despite fast non-radiative decay short exciton diffusion lengths. This results in a significant fluorescence enhancement, which in turn facilitates an order of magnitude increase of the efficiency of polymer light …
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Synthesis and applications of materials and polymers containing graphenic and/or triptycene moities
… is enhanced by creating a hybrid system with squaraine (Hbond acceptor) and a HFIP-dypyrrin based dye (H-bond donor).