Abstract
AbstractThis 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.
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