Mechanochromic luminogens with hypsochromically shifted emission switching property: recent advances and perspectives

Abstract

Mechanofluorochromic (MFC) materials are a class of luminescent materials that have ability to show changes in their emission when subjected to various mechanical stimuli. A wide range of MFC materials...

Structure-controlled intramolecular charge transfer in asymmetric pyrene-based luminogens: synthesis, characterization and optical properties

“…This may be ascribed to the transformation of the packing arrangement and molecular configurations in the different states. 42…”

“…This may be ascribed to the transformation of the packing arrangement and molecular configurations in the different states. 42 Theoretical explorations were carried out in to verify the influence of the intramolecular charge transfer on the optical properties in this asymmetrical D-A system at the B3LYP/6-31g-(d) level. 43,44 As expected, the para substituted moieties on the terminal phenyl basically determined the distributions of their lowest unoccupied molecular orbital (LUMO) and highest occupied molecular orbital (HOMO).…”

Recent advances in the development of phenothiazine and its fluorescent derivatives for optoelectronic applications

“…45 Based on the different phenomena exhibited by the mechanochromic materials, mechanochromism can be classified into various groups, such as two-color and multicolor mechanochromism, 46 reversible and irreversible mechanochromism, 47 fluorescence–phosphorescence mechanochromism, 48 turn-on and turn-off type mechanochromism, 49 and bathochromically and hypsochromically shifted mechanochromism. 50…”

Flanking-donor-controlled diversity in mechanical-force-induced reversible fluorochromism and enhanced emission for carboxylic acid and ester linked solid-state emitters

“…8 Among the various MFC organic emitters, small molecules with defined molecular structures have been deeply explored compared to polymeric molecules, which exhibit limitations in terms of their synthetic difficulties, reproducibility, purity, and ill-defined molecular structure. 9,10 Although a few comparative studies of compounds displaying MFC behavior have been reported, 11–14 the MIEE features of carboxylic acid and ester molecules have hardly been investigated. 15,16 The molecular packing motif in the solid state is primarily directed by inter/intramolecular H-bonding interactions.…”