In situ spectroelectrochemical studies of the fluorescence of 5-substituted indole trimer films

Literature Information

Publication Date 2000-01-09
DOI 10.1039/A909088F
Impact Factor 3.676
Authors

Peter Jennings, Anita C. Jones, Andrew R. Mount


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Abstract

A novel in situ spectroelectrochemical cell has been constructed for the simultaneous measurement of fluorescence and current-voltage characteristics during redox cycling. This involves the use of a detachable rotating disc electrode (RDE), which allows the characterisation of luminescent redox active films produced electrochemically under controlled hydrodynamic conditions. Using this cell, the fluorescence of 5-cyanoindole (CI) and indole-5-carboxylic acid (ICA) films has been measured as a function of redox composition during cyclic voltammetry at slow sweep rates. At faster sweep rates hysteresis has been observed in the recorded fluorescence-charge response, indicative of a structural change in the film. The rate of this structural change appears to be decreased by linking the trimer redox centres in the film and by switching from CI to ICA, consistent with the influence of intertrimer hydrogen bonding. Variation in the observed fluorescence emission as a function of wavelength has also been observed, which gives spatial information on the nature of the film redox reaction. This technique shows potential as a method for probing the kinetics and mechanisms of the reaction of electrochemiluminescent films.

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Contents list

Front/Back Matter

DOI: 10.1039/C3CP90074F

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Source Journal

Physical Chemistry Chemical Physics

Physical Chemistry Chemical Physics
CiteScore: 5.5
Self-citation Rate: 10.3%
Articles per Year: 3036

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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