Fluorinated phenothiazine derivatives: Photophysical properties, mechanochromism and thermochromism

Thermochromism of rapid responses to temperature changes versus mechanochromism in a Ni-dithiolene complex salt

“…Piezochromism/mechanochromism is another phenomenon that involves changes in the electron structure of matter due to hydrostatic pressure or strain. In molecular or hybrid thermochromic materials, it is expected that both thermochromism and piezochromism/mechanochromism will be exhibited simultaneously, [16][17][18] as they have two or more stable states that are related to different molecular, aggregated, or crystal structures. On the other hand, the molecular or hybrid crystals have lower formation energy of the lattice, and not too high hydrostatic pressure or strain may result in the transformation from one stable state to another metastable one, giving rise to piezochromism/mechanochromism.…”

Modulating the electron-donating ability of aggregation-induced emission molecules for improved photo-responsive properties

“…S15 (ESI†), PBYN and DOPBYN showed similar characteristics with the intensity enhanced to 8 and 4 times, respectively. 35 These results indicated that all compounds were typical AIE materials. All compounds exhibited high photoluminescence quantum yields (PLQYs) of 20.7% for DOPBYN , 17.2% for OPBYN , and 11.2% for PBYN in the solid states.…”

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

“…Wan et al reported fluorinated phenothiazine derivatives 20 , 21 and 22 (Chart 2). 105 The crystalline sample of monofluoro derivative 20 , when crushed, showed a hypsochromic shift in its emission (Δ λ = −35 nm) due to the loose molecular packing that could be easily disturbed by the weak external stimulus. with strong grinding, a bathochromic shift (Δ λ = +41 nm) in its emission was observed (Fig.…”

“…and 22 (Chart 2) 105. The crystalline sample of monofluoro derivative 20, when crushed, showed a hypsochromic shift in its emission (Dl = À35 nm) due to the loose molecular packing that could be easily disturbed by the weak external stimulus.…”