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Chemistry In Pictures

Chemistry in Pictures: Where’d I put that photocatalyst?

by Manny Morone
June 6, 2019

The floor of fume hood cast in purple light, littered with flasks, and one flask glows bright green.
Credit: William Weigel

As he was leaving the lab for the night, William Weigel turned off the light in his lab space and noticed one of the (many) flasks in his fume hood was glowing green. It turned out that a small amount of an iridium complex (structure shown) stuck to the walls of this flask had started to fluoresce due to a bit of blue-ultraviolet light coming off of a photochemical reaction he was running nearby. And that’s not the only thing this compound does when hit with light: David Martin’s lab at the University of California, Riverside, in which Weigel is a PhD student, has devised a series of C–H functionalization reactions that are catalyzed by this iridium complex when illuminated with blue light-emitting diodes (ACS Catal. 2019, DOI: 10.1021/acscatal.9b01394).

Submitted by William Weigel

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The structure of a tetrahedral iridium metal complex with fluorinated ligands that has been used as a photocatalyst.

Related C&EN Content:

Photocatalysts Built In A Snap

Dual C–F/C–H functionalization unveiled

Chemistry in Pictures: Water it down, turn it up.


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