Laser flash photolysis study of anthracene/viologen charge transfer complex in non-polar, dealuminated zeolites

Literature Information

Publication Date 2004-02-12
DOI 10.1039/B313477F
Impact Factor 3.676
Authors

Mercedes Álvaro, Avelino Corma, Belén Ferrer, Hermenegildo García, Emilio Palomares


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Abstract

A charge-transfer anthracene/viologen complex has been assembled within two purposely-prepared, non-polar Beta zeolite samples devoid of framework negative charge and positive cations. IR spectroscopy (absence of silanol groups), vapor adsorption (preferent n-hexane adsorption over water) and powder X ray diffraction (high crystallinity with minimum structural defects) indicate the “hydrophobic”, low-polarity characteristics of the Beta zeolite samples used. Laser flash photolysis upon 532 nm selective excitation of the charge-transfer band shows that the photogenerated radical ions live hundreds of μs. This is the same time scale as for conventional, polar faujasites with high Al content. We suggest that in our non-polar zeolite the compartmentalized space and the ability of zeolites to participate in electron transfer processes are the main factors contributing to the remarkable lifetime increase of radical ions.

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Physical Chemistry Chemical Physics

Physical Chemistry Chemical Physics
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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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