Ultraviolet spectroscopy colored compounds

Key Mechanism 15-3 The Diels-Alder Reaction 684 15-12 The Diels-Alder as an Example of a Pericyclic Reaction 692 15-13 Ultraviolet Absorption Spectroscopy 696 15-14 Colored Organic Compounds 701... 

The concentrations of the different members of a DCL depend on the physical and chemical environment of the respective system (pH, solvent, concentration of target molecules, etc.). The Ubrary composition is therefore a characteristic feature of the respective environment If the DCL composition can be transduced into a signal output, it is possible to use the DCL as a sensor. Typically, DCLs are analyzed by nuclear magnetic resonance spectroscopy or high-performance hquid chromatography. For sensing purposes, however, faster and cheaper analysis methods such as fluorescence or ultraviolet-visible (UV-Vis) spectroscopy are preferred. These techniques can be used if the DCL is composed of compounds with different color or fluorescence properties (Figure 7.1). 

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