The Direct Application of Laser Flash Photolysis to Cotton Fabric Dyed with Phthalocyanine Dye

Flash photolysis studies of sulphonated aluminium(III) phthalocyanine contained in cotton fabric show that the dye has essentially the same spectral behaviour as when dissolved in water, but the lifetime of excited states is longer. The observed behaviour of the dye is discussed in terms of the restricted diffusion of molecules within the cotton fibres and of the enhanced lifetimes of the excited states