Time-resolved fluorescence study on the mechanism of polarizing energy transfer in uniaxially oriented polymer blends
Literature Information
A time-resolved study of polarizing energy transfer in oriented blends of a conjugated polymer [a dialkoxy-substituted poly(p-phenyleneethynylene) derivative] and an organic laser dye (7-diethylamino-4-methylcoumarin) in ultra-high molecular weight polyethylene is presented. The transfer is described in terms of a Förster mechanism, based on long-range dipole–dipole interactions. Förster radii were determined in oriented blend films and in chloroform solutions. It was found that the transfer process is critically influenced by the phase behavior of the system under investigation. A depolarizing homotransfer between donor molecules was found to be a key step in the polarizing nature of the transfer which, ultimately, allows excitation light polarized perpendicularly to the film orientation direction to be emitted with the polarization direction parallel to its orientation.
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Physical Chemistry Chemical Physics

Physical Chemistry Chemical Physics (PCCP) is an international journal co-owned by 19 physical chemistry and physics societies from around the world. This journal publishes original, cutting-edge research in physical chemistry, chemical physics and biophysical chemistry. To be suitable for publication in PCCP, articles must include significant innovation and/or insight into physical chemistry; this is the most important criterion that reviewers and Editors will judge against when evaluating submissions. The journal has a broad scope and welcomes contributions spanning experiment, theory, computation and data science. Topical coverage includes spectroscopy, dynamics, kinetics, statistical mechanics, thermodynamics, electrochemistry, catalysis, surface science, quantum mechanics, quantum computing and machine learning. Interdisciplinary research areas such as polymers and soft matter, materials, nanoscience, energy, surfaces/interfaces, and biophysical chemistry are welcomed if they demonstrate significant innovation and/or insight into physical chemistry. Joined experimental/theoretical studies are particularly appreciated when complementary and based on up-to-date approaches.











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