Emissive tetraphenylethylene (TPE) derivatives in a dissolved state tightly fastened by a short oligo(ethylene glycol) chain

Abstract

The structural change in the excited state evidently plays a crucial role for quenching process of organic molecules exhibiting aggregation-induced emission (AIE, thus AIEgens) in the solution state. In this...

Elucidation of the key role of isomerization in the self-assembly and luminescence properties of AIEgens

“…[22][23][24][25] Tetraphenylethene (TPE), a star AIE luminogen, is an ideal candidate for the experimental study of stereoisomerism by the asymmetrical substitutions of its CQC double bond. [26][27][28][29][30][31] The influence of TPE-based Z-/E-isomers on their assembled morphologies and luminescent properties has been widely reported experimentally, it is found that Z-/E-isomers with the same chemical formula display dramatically different morphologies and emission properties. 21,[32][33][34][35][36][37] For example, the crystalline state of Z-BETPE is a needle-shape with greenishblue emission, while that of E-BETPE is a bulk-like morphology with blue emission.…”

A coumarin coupled tetraphenylethylene based multi-targeted AIEgen for cyanide ion and nitro explosive detection, and cellular imaging

“…The quantum yield of TPE-Lac was measured using fluorescein as the standard. 63 The probe showed a decent fluorescence quantum yield ( φ F ) of 0.251. From this photophysical behaviour, we have fixed the excitation wavelength and water/THF percentage at 345 nm and 97%, respectively, for carrying out further studies.…”

Tetraphenylethene-based macrocycles with dual-ring topology: synthesis, structures, and applications

“…Kokado synthesized emissive TPE derivatives 11 and 12 in a dissolved state by using tightly fixed short oligomeric (ethylene glycol) chains (Scheme 2c). 46 They formed a series of TPE macrocycles through intramolecular McMurry coupling, where the ortho -benzene ring was connected with the low polyethylene glycol chain. The substitution at the para and meta positions yielded cis isomers of TPE macrocycles, while in the case of short OEG chains, ortho -substitution resulted in trans isomers.…”