Light/temperature-enhanced emission characteristics of malononitrile-containing hexaphenyl-1,3-butadiene derivatives: the hotter, the brighter

Abstract

The HPB-CN-coated filter paper exhibited stronger PL intensity as exposure time under UV light prolonged and heating temperature increased, to realize the hotter, the brighter.

Aggregation‐Induced Emission of Multiphenyl‐Substituted 1,3‐Butadiene Derivatives: Synthesis, Properties and Application

“…As mentioned above, MPBsc an be cyclized under UV irradiation, and thus, al ight/temperature-enhanced emission based fluorescence" turn-on" probe was preparedb yu sing this unique property. [88] The PL intensity of the HPB-5c-coated filter paper becames tronger as the temperature gradually increased (Figure 10 A), andt he emission maximum was blueshifted as well. The mechanismw as revealed to be that UV light irradiation causes HPB-5c on the filter paper to undergo thermoinduced crystallization, as illustrated in Figure 10 B, which then induces the cyclization of the well-arrangedH PB-5c molecules.…”

“…[89] It was shown that the TPB-5c probe has high selectivity for g-globulins over other components in the blood The crystallizationo fH PB-5c on the filter paper and photocyclization of HPB-5cunder UV irradiation uponheating. [88] serum, including serum albumins, fibrinogen, glucose, urea, and cholesterol, as shown in Figure 11.I nf act, these species can barely interferew ith the molecular interactions between TPB-5c and g-globulins. The high specificity of TPB-5c probe enabledi ns itu quantitative detection of g-globulins without isolating g-globulins from the bloods erum.…”

“…As mentioned above, MPBs can be cyclized under UV irradiation, and thus, a light/temperature‐enhanced emission based fluorescence “turn‐on” probe was prepared by using this unique property . The PL intensity of the HPB‐5c‐coated filter paper became stronger as the temperature gradually increased (Figure A), and the emission maximum was blueshifted as well.…”

“… (A) Correlation between the absolute change in the PL intensity ( I / I 0 ) of HPB‐5c‐coated filter paper strips and heating time at different temperatures. (B) The crystallization of HPB‐5c on the filter paper and photocyclization of HPB‐5c under UV irradiation upon heating …”

Photo‐Responsive Fluorescent Materials with Aggregation‐Induced Emission Characteristics

“…[71][72][73][74][75][76][77][78] Some photo-responsive fluorescent materials with AIE properties based on photocyclization reactions have been reported, and show excellent performance in advanced nanotechnological, biomedical, and photo-physicochemical applications. [79][80][81][82][83][84][85][86][87][88] In a recent example, by introducing rigid spiro scaffolds into diphenylethene moieties, Tang et al synthesized a kind of novel AIEgens (SIPs) with deep-blue emission, which exhibited state-dependent photocyclization behaviors and fluorescence properties. [82] The photocyclization processes and AIE properties are shown in Figure 3A.…”