A new family of unsymmetrical imine-based trimethine and pentamethine cyanine dye analogues is reported that can form under reversible and thermodynamically controlled conditions from non- or weakly emissive amine and aldehyde building blocks. These dynamic fluorophores show spectroscopic properties comparable to those of their parent cyanine dyes and are responsive to external effectors.
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Meguellati et al. (2009) studied this question.
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