Some observations of spectroscopic and photoconductivity effects in permselective membranes

Some permselective membranes colored through, the existence of conjugated double bonds in the polymer backbone were investigated. Changes in the absorption spectrum due to different gegenions were found. The current through the membranes increases on illumination. The additional current depends on the magnitude of the dark current, light intensity, existence of double-bond structure, and the spectrum employed. Saturation of the double bond occurs during prolonged current transfer in the dark or light. The characteristics of such membranes as mixed ionic and electronic conductors and the role of internal polarization within the body of the membrane are discussed.