Dual-state emission and mechanofluorochromic properties of coumarin derivatives containing α-cyanostilbene

One-Step Transformations from ACQ Luminogens to DSEgens via the Boc Protection Process

“…Compound ROIN-B also exhibits bright fluorescence emission in solution with high Φ PL . This result demonstrated that it is a DSE molecule …”

“…Solid-state luminogens may exhibit mechanochromism by altering their luminescence in response to external mechanical forces, such as grinding, compressing, and shearing. , Thereafter, the mechano response of ROIN-B was then examined. Under irradiation with UV light at 365 nm, the pristine powder of ROIN-B exhibits yellow fluorescence with the emission peak at 544 nm.…”

“…17−19 Thus, DSEgens may be more competitive than ACQ and AIE molecules to meet the growing demands for developing new advanced optical and biomedical materials. 4,20,21 In recent years, a large number of new DSEgens have been reported with different scaffolds, including tetraphenylamine, 22 benzo thiadiazole, 23 coumarin, 21,24 carbazole, 25,26 cyanostilbene, 27 triphenylamine-based compounds, 28,29 etc. 30−32 Undoubtedly, these studies would not only be able to fill the gap between ACQ molecules and AIEgens, but some preliminary guidance could also be beneficial for increasing the likelihood to obtain new DSEgens.…”

“…In recent years, a large number of new DSEgens have been reported with different scaffolds, including tetraphenylamine, benzo thiadiazole, coumarin, , carbazole, , cyanostilbene, triphenylamine-based compounds, , etc. − Undoubtedly, these studies would not only be able to fill the gap between ACQ molecules and AIEgens, but some preliminary guidance could also be beneficial for increasing the likelihood to obtain new DSEgens. However, examples with accurate molecular design and specific synthetic strategies for exploring DSEgens have been rarely reported .…”

A benzothiazole-coupled NS4-donor macrocycle and its complexation-based dual-channel sensing for Hg2+: the influence of anions and structure–function relationship

“…[12][13][14][15] As a molecular-level monitoring approach, photophysical chemosensors utilising functionalised macrocyclic systems with signalling units are promising because of the casual and economic aspects of point-of-care testing. [16][17][18][19] Macrocycles are well known for their high selectivity via the central cavity that recognises specific guests including cations, anions or small organic molecules based on size, shape, hard/ softness of donors and functional groups. [20][21][22][23] Such complexationbased selectivity allows macrocyclic sensors to discriminate even in the presence of similar analyte components.…”