Fluorescence probes for the evaluation of diffusion of ionic reagents through network polymers: chemical quenching of the fluorescence emission of the Dansyl probe in macroporous styrene-divinylbenzene and styrene-diisopropenylbenzene copolymers

N-Benzyl-5-(dimethylamino)naphthalene-1-sulfonamide

“…For the use of dansyl fluorescent analogs as insecticides and synergists, see: Himel et al (1971). Dansyl probes have also been covalently incorporated into a variety of polymeric networks, see: Shea et al (1989). Dansyl chromophoric compounds have been investigated for intramolecular energy transfer in aromatic ring systems, see: Schael et al (1998) and for host-guest interations shown by fluoresence studies of dansyl-labelled calix [6]arene, see: Schonefeld et al (2006).…”

“…Dansyl fluorescent analogs have been reported as insecticides and synergists (Himel et al,1971). Dansyl probes have also been covalently incorporated into a variety of polymeric networks (Shea et al,1989). Dansyl chromophoric compounds were investigated for intramolecular energy transfer in aromatic ring systems (Schael et al,1998).…”

Interaction of naphthalene-labeled poly(hydrochloride quaternized 2-norbornene-5-methyleneamine) with O/W microemulsion droplets

“…The decreased monomer emission indicates that the excited state of NA is deactivated by nonradiative decay, and NA groups are not concentrated in common domain (close to form excimer). The intramicellar quenching of NA groups by electrophiles can suppress the monomer emission 19. Thus, the energy loss via a strong electrostatic interaction between ionic groups of poly(HCQNBMA)/NA and SDS seems to be operative.…”

Matrix effects on the selectivity of a cholesterol-imprinted polymer

“…The lack of correlation between the surface areas of the polymers and the yield of hydrolysis may be a reflection of the interaction of the solvent used in the hydrolysis step (methanol) with the microstructure of the polymers. Shea et al used the quenching of fluorescent probes in macroporous DVB-based polymers to determine the diffusivity of ionic reagents [21] and to investigate chain solvation in a similar system [22]. The latter study concluded that the degree of hydrolysis of a ketal-based template in methanol did not correlate with the macroscopically observed properties of the polymers, such as their swelling behaviour in the same solvent.…”