Straightforward intra/intermolecular cyclization to AIE-active cyclic TPE: selectively distinguishing benzaldehyde and a temperature sensor

Abstract

A series of novel aggregation-induced emission (AIE) cyclic tetraphenylethene (TPE) were successfully constructed by straightforward intra/intermolecular cyclization. These cyclic TPE were formed with a bridging moiety, such as alkyl, or...

Toward High Contrast and Noninvasive Fluorescence Switches via an O-Fused Ring 5,7-Dihydroxy-4-methyl-2,2,3-triphenylbenzofuran-6(2H)-one Strategy

“…The structure and synthesis of the required O-fused ring molecules are effectively described in Scheme . Compounds 1 and 2 had already been synthesized through the method as previously reported by our group in 75 and 63% yields, respectively . Compound 2 was converted to an unprecedented O-fused ring 5,7-dihydroxy-4-methyl-2,2,3-triphenylbenzofuran-6­(2 H )-one ( 3 ) in 85% yield by sequential reaction with BBr 3 and p -toluenesulfonic acid monohydrate.…”

“…Interesting new FMSs, such as fluorinated pyrrole, TPE macrocycles, and luminescent isomers, had been synthesized and applied to detection, recognition, and temperature sensors in our previous reports . In this work, an unprecedented O-fused ring 5,7-dihydroxy-4-methyl-2,2,3-triphenylbenzofuran-6­(2 H )-one ( 3 ) was first time synthesized.…”