Three-in-One: AIEgen End-Labeling of CO2 Polymer for Visible Fiber Thermometer

Visual temperature sensors are of great significancefor environmentalmanagement and industrial process control. Herein, we developed avisual sensing approach based on fiber fluorescent imaging by configuringaggregation-induced emission (AIE)-functionalized CO2-basedpoly(propylene carbonate) (PPC). A three-in-one strategy incorporatingAIE (tetraphenylethylene), chain transfer (hydroxyl), and co-catalytic(pyridinium salt) properties into one system is proposed to synthesizeAIEgen end-labeled PPC as a thermometer material. Based on the twistedintramolecular charge transfer effect of the AIE unit, the fiber thermometerobtained by melt spinning transforms the invisible temperature gradientinformation into different fluorescent colors that are visible tothe naked eye. In the range of -40 to 140 & DEG;C, multiscaletemperature visualization applications, such as regional temperaturedetection, internal one-dimensional (1D) and two-dimensional (2D)temperature mapping, etc., could be implemented at a high resolution(& PLUSMN;1 & DEG;C, 10 & mu;m).

Automated summary

Visual temperature sensors using fiber fluorescent imaging based on aggregation-induced emission (AIE)-functionalized CO2-based PPC have been developed. A three-in-one strategy involving AIE, chain transfer, and co-catalytic properties was used to synthesize AIEgen end-labeled PPC as a thermometer material. The fiber thermometer obtained by melt spinning converts the invisible temperature gradient information into different fluorescent colors visible to the naked eye. It enables high-resolution (±1°C, 10μm) multiscale temperature visualization applications in the range of -40 to 140 °C, including regional temperature detection and internal 1D/2D temperature mapping.