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Advances in fibre optic sensors and, in particular, the technique of electropolymeñsation have led to a development which allows for porphynns, the sensing molecules, to be attached directly onto the tip of an optical fibre. The sensing element as a whole is very robust, since during the process of elecopolymerisation the molecule forms a matrix on the surface of the fibre-film, thus ensuring no leeching of the film constituents to the surrounding environment. Luminescence lifetime decays were obtained using a novel dedicated instrumentation system. The data was analysed using high level languages incorporating mathematical modelling capabilities.The results of this work are reported as well as a detailed discussion of the electropolymerisation process with respect to the porphyrins.

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