An aggregation-induced emission luminophore with multi-stimuli single- and two-photon fluorescence switching and large two-photon absorption cross section

Abstract

A novel aggregation- and crystallization-induced emission luminophore (ENPOMe) containing tetraphenylethene and acrylonitrile moieties with high fluorescence efficiency (Φ(F) of up to 0.85) has been easily synthesized. ENPOMe has an exceptionally large two-photon absorption cross section (σ) of 5548 GM, and exhibits striking multi-stimuli-responsive single- and two-photon fluorescence switching with excellent reversibility in the solid state.

A TPE–benzothiazole piezochromic and acidichromic molecular switch with high solid state luminescent efficiency

“…18 Although TPENSOH exhibited stronger luminescence in comparison with most of the acid/base-stimuli-responsive emitters, its uorescence quantum yield (around 0.3) remain moderate among the whole AIEgen family. As reported previously, 1,17,19,20 aromatic-substituted acrylonitrile derivatives have been proved to be AIE-active and possess a strong uorescence emission in solid-state. Furthermore, combining two AIE moieties in a single molecule probably can endow the luminophore with stronger uorescence emission.…”

“…13 Therefore, TPE derivatives with varied optical properties have been hotly investigated. [14][15][16][17] Recently, we have also presented a TPE-base luminophore, i.e. TPENSOH, which contains a functional group of 6-hydroxybenzothiazole.…”

An acrylate AIE-active dye with a two-photon fluorescent switch for fluorescent nanoparticles by RAFT polymerization: synthesis, molecular structure and application in cell imaging

“…Repeated grinding and annealing of the samples gave similar results, conrming that TPMA had good reversibility between the two wavelengths, which should attribute to the transformation of TPMA between amorphous and crystalline structures. 41 Aside from annealing, solvent-vapor-induced crystallized samples (S 1v , S 2v and S 3v ) are obtained from the ground samples. The good reversibility between the two wavelengths is similar with the above phenomenon, suggesting that both annealing and vapor inducement can promptly revert high two-photon uorescence from green light to blue light with multi-stimuli-responsivity.…”

On-Off Type Mechanofluorochromism of a Novel Fluorescent Amorphous Molecular Material, N-{4-[Bis(4-methylphenyl)amino]benzylidene}aniline

“…A variety of mechanofluorochromic materials have been created and investigated. [7][8][9][10][11][12][13][14][15][16][17][18][19] In most cases, it is believed that changes in intermolecular interaction due to disordering the molecules in the crystals resulted in their mechanofluorochromism. It is of interest and of importance to create novel mechanofluorochromic materials and to elucidate the mechanism of the phenomena.…”