Dansylated copolymers, fluorescence

Figure 3. Dependence ofF 520, the fluorescence emitted at 520 nm hy dansylated copolymers, on the degree of deprotonation, a. Key 0, O, , butyl copolymer in water, 0,2 M NaCl, and 0.5 M NaCl, respectively , methyl copolymer in water. Adapted from ref. 18. Copyright 1975 American Chemical Society.)...

Strauss UP, Schlesinger MS (1978) Effects of alkyl group-size and counterirai type on behavior of copolymers of maleic-anhydride and alkyl vinyl ethtrs. 2. Fluorescence of dansylated copolymers. J Phys Chem 82(14) 1627-1632. doi 10.1021/jl00503a011... 

Strauss UP, Vesnaver G (1975) Optical probes in polyelectrolyte studies. 2. Fluorescence-spectra of dansylated copolymers of maleic-anhydride and alkyl vinyl ethers. J Phys Chem 79 (22) 2426-2429. doi 10.1021/j 100589a017... 

Changes in the polymer concentration had no significant effect on the fluorescence behavior therefore, the transition was an intramolecular rather than an intermolecular phenomenon. In contrast to the butyl copolymer, the dansylated methyl copolymer, whose fluorescence is also shown in Figure 3, undergoes no transition its fluorescence is essentially constant over the whole ionization range. The low value is characteristic of the aqueous environment that the probe experiences in the random coil conformation. 

Shea, K.J. Sasaki, D.Y. Stoddard, G.J. Fluorescence probes for evaluating chain solvation in network polymers. An analysis of the solvatochromic shift of the dansyl probe in macroporous styrene-divinylbenzene and styrene-diisopropenylbenzene copolymers. Macromolecules 1989, 22, 1722-1730. 

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