Systematic derivatives of 1-(dicyanomethylene)indan and their photophysical properties as potential viscosity sensors

초록

This study focuses on derivatizing 1-(dicyanomethylene)indan as a viscosity sensor. The indan was extended with various functionalized naphthaldehydes under a push-pull design strategy. Among synthesized derivatives, salt-capped derivatives exhibited an excellent linearity between fluorescent intensity and viscosity (R2 = 0.99), and further investigation underscores the reversible nature of fluorescence intensity changes at two temperatures as an important trait of viscosity sensors. This research demonstrates creating a viscosity sensor from 1-(dicyanomethylene)indan as a new skeleton. Salt-capped derivatives show notable linearity (R2 = 0.99) between fluorescence intensity and viscosity, with reversible changes at two temperatures, a crucial trait. image

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