Solid-substrate and micellar-stabilized room temperature phosphorescence of two anilinonaphthalenesulfonates

Room temperature phosphorimetric studies were made on two important fluorescent probes: 8-anilinonaphthalene-1-sulfonate (ANS) and 6-toluidinylnaphthalene-2-sulfonate (TNS). The two dyes gave proper RTF signals using solid-substrate room temperature phosphorimetry (SS-RTP) and micellar-stabilized room temperature phosphorimetry (MS-RTP) under the experimental conditions described in this article. The SS-RTP signals are observed on filter paper using thallium(I) nitrate as a heavy atom. The MS-RTP emission of the compounds is also measurable in sodium dodecyl sulfate (SDS) micelles by applying sodium sulfite as an oxygen scavenger and thallium(I) nitrate as a heavy atom. Light irradiation for a certain period of time could increase the RTP intensities of ANS and TNS solutions. Our results provide some useful information for the RTP studies of derivatized macromolecules using ANS or TNS as phosphorescent probes.