Solid-surface fluorescence of hydrophilic dyes on different polysaccharide matrices

Abstract

Cellulose diacetate (CDA) fibers and films, fibers of chitosan (CTS) of polycationic and polybasic forms were examined as matrices for solid-surface fluorescence (SSF) of hydrophilic fluorescent dyes : eosin Y and trypaflavine. CDA film and fiber ability to absorb trypaflavine was proved. The extraction degree and SSF signal of trypaflavine was higher for CDA film than fiber. The polybasic CTS was shown to have the highest sorption capacity (R = 95.5%) relative to eosin Y and to be the best matrix for its SSF signal. The obtained results can be used in the design of chemical sensors based on SSF measurement.