Boron Difluoride Complexes of Expanded N-Confused Calix[n]phyrins That Demonstrate Unique Luminescent and Lasing Properties
Complexation of novel multiply N-confused expanded calix[n]phyrins with boron difluoride afforded a new class of cyclic BODIPY (boron-dipyrromethene) arrays. The structures of circularly arranged BODIPY subunits linked in an N-confused fashion give rise to such photophysical properties unique to the macrocycles as redshifted emission wavelengths along with apparent large Stokes shifts, long emission lifetimes, and solid-state lasing. The DFT calculations support the size-dependent excited-state dynamics of the macrocycles.
3-ACYL-1-TOSYLPYRROLES AS EXCELLENT PRECURSORS OF 3-VINYLIDENEPYRROLES
Two simple general methods for the synthesis of 3-vinylidenepyrroles 4a - c both starting from 3-acyl-1-tosylpyrroles have been developed.The simplest term of this class, 3-(1-methylethenyl)pyrrole, 4a, and the congeners 3-(1-phenylethenyl)pyrrole, 4b, an