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Most Popular in Physical Chemistry
These photos show two different forms—amorphous and crystalline—of a naphthalimide dye in a single vial from two angles. In the side view (top, left), amorphous nanosized aggregates of the dye appear as a greenish-yellow cloud, while the blue-green, bladelike crystals are most visible in the top-down view (top, right). The nanoaggregates have an emission maximum at about 540 nm (bottom, left), and the crystals have a maximum around 500 nm (bottom, right). João Avó, a postdoc at the Instituto Superior Técnico, designed the dye for a research project for which he is the principal investigator. His aim is to create systems that exhibit thermally activated delayed fluorescence in aqueous media for use in optical time-resolved imaging in live cell cultures. He’s encouraged by the ability of this particular dye and its analogs to display strong emission in the aggregate state.
Submitted by João Avó (@JoaoMAvo)
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