Related Experiment Video
Updated: Jul 6, 2026
08:23
Visualization of Bacterial Resistance using Fluorescent Antibiotic Probes
Published on: March 2, 2020
Fluorescent amino- and thiopyronin dyes
1Texas A&M University, Chemistry Department, College Station, TX 77842, USA.
Organic Letters
|April 10, 2008
Summary
New rhodamine and rosamine analogues were synthesized. These highly fluorescent compounds were derived from a ketone precursor, offering potential applications in various scientific fields.
Area of Science:
- Organic Chemistry
- Materials Science
- Fluorescent Dyes
Background:
- Rhodamine and rosamine dyes are crucial fluorophores.
- Developing novel analogues with enhanced properties is an ongoing research area.
- Ketone precursors offer a versatile synthetic route.
Purpose of the Study:
- To synthesize novel rhodamine/rosamine analogues.
- To investigate the fluorescence properties of the new compounds.
- To establish a synthetic pathway from ketone precursors.
Main Methods:
- Synthesis of ketone precursor 1.
- Preparation of rhodamine/rosamine analogues 2 from ketone 1.
- Characterization of synthesized compounds (e.g., spectroscopy, NMR).
Main Results:
- Successful synthesis of highly fluorescent rhodamine/rosamine analogues 2.
- Confirmation of the structure of the new analogues.
- Demonstration of fluorescence in the synthesized compounds.
Conclusions:
- A new class of fluorescent rhodamine/rosamine analogues was successfully prepared.
- The synthetic route from ketone 1 is effective for generating these dyes.
- The resulting analogues exhibit high fluorescence, suggesting potential utility.
Related Concept Videos
01:12Immunofluorescence Microscopy
A fluorescence microscope uses fluorescent chromophores called fluorochromes, which can absorb energy from a light source and then emit this energy as visible light. Fluorochromes include naturally fluorescent substances (such as chlorophylls) and fluorescent stains that are added to the specimen to create contrast. Dyes such as Texas red and FITC are examples of fluorochromes. Other examples include the nucleic acid dyes 4’,6’-diamidino-2-phenylindole (DAPI), and acridine orange.
The...
The...
01:19Protein Dynamics in Living Cells
Different fluorescence-based techniques are used to study the protein dynamics in living cells. These techniques include FRAP, FRET, and PET.
Fluorescent recovery after photobleaching (FRAP) is a fluorescent-protein-based detection technique used to quantify protein movement rates within the cell. This method exposes a small portion of the cell to an intense laser beam. The laser beam causes permanent photobleaching of the fluorophore-tagged proteins in the exposed region. As the bleached...
Fluorescent recovery after photobleaching (FRAP) is a fluorescent-protein-based detection technique used to quantify protein movement rates within the cell. This method exposes a small portion of the cell to an intense laser beam. The laser beam causes permanent photobleaching of the fluorophore-tagged proteins in the exposed region. As the bleached...
01:14Photoluminescence: Applications
Photoluminescence offers a wide range of applications due to its inherent sensitivity and selectivity. This technique allows for both direct and indirect analyses of the analyte. Direct quantitative analysis is possible when the analyte exhibits a favorable quantum yield for fluorescence or phosphorescence. However, an indirect analysis may be feasible if the analyte is not fluorescent or phosphorescent, or if the quantum yield is unfavorable. Indirect methods include reacting the analyte with...
01:11Aryldiazonium Salts to Azo Dyes: Diazo Coupling
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.
01:25Fluorescence and Phosphorescence: Instrumentation
Fluorometers and spectrofluorometers are two types of instruments used for measuring molecular fluorescence. These instruments differ in how they select excitation and emission wavelengths and the type of light sources they utilize. Fluorometers use absorption interference filters to choose excitation and emission wavelengths. The excitation source in a fluorometer is typically a low-pressure mercury vapor lamp that emits intense lines distributed throughout the ultraviolet and visible regions.
03:31Labeling DNA Probes
DNA probes are fragments of DNA labeled with a reporter tag to enable their detection or purification. The resulting labeled DNA probes can then hybridize to target nucleic acid sequences through complementary base-pairing, and may be used to recover or identify these regions.
Radioisotopes, fluorophores, or small molecule binding partners like biotin or digoxigenin, are the most widely used reporter tags for labeling DNA probes. These labels can be attached to the probe DNA molecule via...
Radioisotopes, fluorophores, or small molecule binding partners like biotin or digoxigenin, are the most widely used reporter tags for labeling DNA probes. These labels can be attached to the probe DNA molecule via...