Chromo- and fluorophoric water-soluble polymers and silica particles by nucleophilic substitution reaction of poly(vinyl amine)

• Katja Hofmann,
• Ingolf Kahle,
• Frank Simon and
• Stefan Spange

Beilstein J. Org. Chem. 2010, 6, No. 79, doi:10.3762/bjoc.6.79

• range of Δ(1-M) = 524 cm−1 and Δ(1-P) = 760 cm−1, respectively. Furthermore, for 1-M only a small Stokes shift (9–15 nm) is observed, whereas 1-P shows a larger one (26–63 nm), which reaches a maximum in strong HBD solvents (HFIP). Again, the solvent-dependent fluorescence emission maxima can be

Synthesis of the fluorescent amino acid rac-(7-hydroxycoumarin-4-yl)ethylglycine

• Manfred Braun and
• Torsten Dittrich

Beilstein J. Org. Chem. 2010, 6, No. 69, doi:10.3762/bjoc.6.69

• ), which not only displays a relatively large Stokes shift but also a fluorescence that is sensitive to both pH and solvent polarity [10][11]. Although a straightforward, short approach to the L-amino acid 1 has been reported [10], its isolation and purification was found to be difficult and tedious