Fluorescence quenching oxygen sensor using an aluminum phthalocyanine-polystyrene film

An aluminum 2,9,16,23-tetraphenoxy-29H, 31H-phthalocyanine hydroxide (AlPc(OH))-polystyrene (PS) film was prepared and its photophysical and photochemical properties were measured. An optical oxygen sensor based on the fluorescence quenching of AlPc(OH)-PS film by oxygen was developed. The ratio I-0/I-100 is used to describe the sensitivity of the sensing him, where I-0 and I-100 represent the detected fluorescence intensities from a film exposed to 100% argon and 100% oxygen, respectively. The I-0/I-100 of AlPc(OH)-PS film is estimated to be 1.04. A Stern-Volmer plot of the film exhibited considerable linearity in low oxygen concentration region (similar to 10%) and the Stern-Volmer constant, K-SV is estimated to be 2.4 x 10(-3)%(-1)(.) (C)2000 Elsevier Science B.V. All rights reserved.