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New fluorescent labels and probes for biological applications

The first part of this thesis describes the synthesis, the spectroscopic properties and the application of several labels. These labels can be devided into two groups. On the one hand there are labels operating in the visible part of the electromagnetic spectrum and on the other hand there are those operating in the far-visible to near infrared part of the spectrum. 
The labels are functionalized with either a C-6 linker carrying a carboxy group in order to get an amino-reactive label (after activation as NHS-ester) or with an alkyne moiety creating a clickable fluorophore. The second part of this thesis deals with the preparation and application of two novel probes for sensing hydrogen peroxide.