Abstract
Alkylamino-functionalized donor-π-acceptor (D-π-A) triarylboranes have been found to be able to capture CO2, forming the carbamic acid derivative. Due to the close proximity of the amine substituent to the boron center, CO2 binding greatly influences the intramolecular charge transfer fluorescence, causing distinct and reversible emission spectral/color change, with a rapid response time, and a detection limit as low as 100 ppm in methanol. In addition, this system is also effective as fluorescence "turn-on" temperature probes due to the dynamic B ← N bond dissociation/association.
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