Molecular Rotor Dye
Molecular Rotor Dye - Related Videos
09:45
Fluorescence Lifetime Imaging of Molecular Rotors in Living Cells
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Cited by 17 •
2012
Fluorescence Lifetime Imaging (FLIM) has emerged as a key technique to image the environment and interaction of specific proteins and dyes in living cells. FLIM of fluorescent molecular rotors allows mapping of viscosity in living cells.
09:26
How to Build a Vacuum Spring-transport Package for Spinning Rotor Gauges
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Cited by 1 •
2016
Here we describe how to build a robust spring-transport mechanism for a spinning rotor gauge. This device securely immobilizes the rotor and keeps it under vacuum during transportation. We also describe packaging that minimizes the risk of damage during transport. Tests show our design works for typical shocks during transport.
04:55
UV-Vis Spectroscopy of Dyes - Concepts
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2020
Absorbance When light interacts with a substance, a portion of the light is absorbed while the rest is either reflected or transmitted through it. Substances that we perceive as having a color reflect light in the visible range. The color of the substance that we are able to see depends on which wavelength of light is reflected. A substance that we perceive as blue reflects light in the blue range (430 – 480 nm) of the visible spectrum. According to the color wheel, the same substance absorbs...
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...
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...
FAQs
The key photophysical event is restricted intramolecular rotation after excitation. In a less restrictive environment, rotation promotes nonradiative energy loss, whereas viscosity or crowding limits that motion. Consequently, increased fluorescence intensity or lifetime can indicate reduced molecular mobility, allowing cancer researchers to interpret signal changes as local mechanical differences rather than as a simple measure of dye presence.
Viscosity and molecular crowding are distinct descriptions of the local environment, but both can hinder the rotation that controls the dye’s fluorescence. This means a bright or long-lived signal reports restricted molecular motion without, by itself, identifying which environmental feature caused it. In cancer studies, spatial comparisons therefore help relate signals to membranes, organelles, or tumor-associated regions.
Intensity and fluorescence lifetime offer two quantitative ways to follow the same environment-sensitive response. When rotational motion becomes more restricted, the mechanism predicts an increase in either readout, so researchers can examine changes across cellular locations or experimental conditions. These measurements help connect optical observations with altered intracellular mechanics, transport, or treatment responses.
Researchers can acquire quantitative fluorescence measurements from regions such as membranes, organelles, and tumor-associated areas, then compare the resulting signals. The important outcome is spatial variation in intensity or lifetime, which can reveal where local physical conditions differ. Repeating observations over time extends this comparison to dynamic changes during live-cell experiments.
Its small-molecule design supports measurements with both spatial and temporal resolution. Researchers can therefore examine where viscosity-related signals occur and how they change while cellular behavior unfolds, rather than relying only on a fixed endpoint. This capability is relevant when studying transport, intracellular mechanics, or changing responses to treatment.
They can help investigate whether intracellular physical conditions differ among cellular compartments or tumor-associated regions, and whether those conditions change during treatment. Because the readout is tied to local fluorescence intensity or lifetime, the method can connect altered mechanics and transport with spatially resolved cellular behavior.