Platinum Porphyrin Dye
Platinum Porphyrin Dye - Related Videos
10:30
Dye-sensitized Solar Cells
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2023
Source: Tamara M. Powers, Department of Chemistry, Texas A&M University Today's modern world requires the use of a large amount of energy. While we harness energy from fossil fuels such as coal and oil, these sources are nonrenewable and thus the supply is limited. To maintain our global lifestyle, we must extract energy from renewable sources. The most promising renewable source, in terms of abundance, is the sun, which provides us with more than enough solar energy to fully fuel our...
10:06
Porphyrin-Modified Beads for Use as Compensation Controls in Flow Cytometry
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2023
The protocol describes how porphyrin-based compensation beads for flow cytometry are prepared by the reaction of amine-functionalized polystyrene beads with the porphyrin TCPP and the amide coupling reagent EDC. A filtration procedure is used to reduce the particulate byproducts.
08:36
FM Dyes in Vesicle Recycling
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2023
FM dyes are a class of fluorescent molecules that has found important use in studying the vesicle recycling process. By virtue of a chemical structure, these molecules can insert themselves into the outer leaflet of phospholipid bilayer membranes. After membrane insertion, they are internalized into the cell via endocytosed vesicles, and released when these vesicles recycle back to the membrane. Since, these dyes fluoresce strongly in the hydrophobic environment within membranes and weakly in...
07:59
Synthesis and Characterization of Multi-Modal Phase-Change Porphyrin Droplets
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Cited by 1 •
2021
In this protocol, methods for synthesizing and characterizing multi-modal phase-change porphyrin droplets are outlined.
07:20
Amide Coupling Reaction for the Synthesis of Bispyridine-based Ligands and Their Complexation to Platinum as Dinuclear Anticancer Agents
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Cited by 1 •
2014
This protocol describes the use of amide coupling reactions of isonicotinic acid and diaminoalkanes to form bridging ligands suitable for use in the synthesis of multinuclear platinum complexes, which combine aspects of the anticancer drugs BBR3464 and picoplatin.
FAQs
After excitation, the platinum-centered porphyrin enters a long-lived excited state that can persist long enough to produce a measurable phosphorescence signal. Oxygen molecules quench this emission, so greater local oxygen availability changes the signal in a concentration-dependent way. This coupling between oxygen chemistry and optical output allows the dye to report conditions inside biological samples.
Both phosphorescence intensity and lifetime can carry information about oxygen availability. Intensity describes how much emitted light remains after oxygen-dependent quenching, whereas lifetime reflects how long the excited state persists before emission is suppressed. Measuring these optical responses gives researchers two related ways to quantify local oxygen conditions rather than relying only on a visible color change.
The platinum center is important because the probe’s optical behavior depends on a metal-containing porphyrin structure rather than an oxygen-insensitive fluorophore alone. Within that structure, light absorption leads to the long-lived excited state required for phosphorescence. Oxygen can then interact with this state and alter the emission, linking the molecular design to biological oxygen sensing.
A typical measurement begins by illuminating the dye-containing biological sample and recording the resulting phosphorescence. The signal can be evaluated through its intensity or lifetime, then related to local oxygen availability. Because the approach is optical and noninvasive, measurements can be applied in cells, tissues, or model organisms while preserving the biological setting being studied.
In cell biology, platinum porphyrin dye measurements can reveal oxygen conditions associated with cellular respiration, metabolism, and hypoxia. The probe is especially useful when researchers need locally resolved information, because its emission responds to oxygen concentration in the surrounding biological environment. These readouts support analysis of how oxygen availability varies across living systems.
Phosphorescence-based imaging extends the method from a single optical signal to oxygen mapping in biological specimens. Researchers can examine tissue oxygenation or oxygen-related changes in model organisms without relying on invasive sampling. The same optical response also supports biosensor development, where oxygen-dependent emission becomes the measurable output for quantitative biological measurements.