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A Rhodopsin Transport Assay by High-Content Imaging Analysis
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A Rhodopsin Transport Assay by High-Content Imaging Analysis

Published on: January 16, 2019

A rhodamine-cyclen conjugate as chromogenic and fluorescent chemosensor for copper ion in aqueous media

Min Wang1, Di Zhang, Man Li

  • 1Phosphorus Chemical Engineering Research Center of Henan Province, Department of Chemistry, Zhengzhou University, Zhengzhou, China.

Journal of Fluorescence
|January 17, 2013
PubMed

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Most organisms use photoreceptors to sense and respond to light. Examples of photoreceptors include bacteriorhodopsins and bacteriophytochromes in some bacteria, phytochromes in plants, and rhodopsins in the photoreceptor cells of the vertebral retina. The light-sensitive property of these receptors is because of the bound chromophores, such as bilin in the phytochromes and retinal in the rhodopsins.
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The reaction of weakly electrophilic aryldiazonium (also called arenediazonium) salts with highly activated aromatic compounds leads to the formation of products with an —N=N— link, called an azo linkage. This reaction, presented in Figure 1, is known as diazo coupling and occurs without the loss of the nitrogen atoms of the aryldiazonium salt. Highly activated aromatic compounds such as phenols or arylamines favor the diazo coupling reaction. The coupling generally occurs at the para position.