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Updated: May 13, 2026

Synthesis of pH Dependent Pyrazole, Imidazole, and Isoindolone Dipyrrinone Fluorophores using a Claisen-Schmidt Condensation Approach
Published on: June 10, 2021
A novel diketopyrrolopyrrole (DPP)-based [2]rotaxane for highly selective optical sensing of fluoride
Mandapati V Ramakrishnam Raju1, Hong-Cheu Lin
1Department of Materials Science and Engineering, National Chiao Tung Univeristy, Hsinchu 30049, Taiwan, ROC.
Abstract:
A novel [2]rotaxane based on an orthogonal H-bonded motif and 3,6-di(thiophen-2-yl)pyrrolo[3,4-c]pyrrole-1,4(2H,5H)-dione (DPP) with controlled topicity was successfully constructed, displaying excellent stimulated responses toward anion and solvent polarity. The preorganized host selectively recognized F(-) with high optical sensitivity and reversibility via enhanced positive cooperativity and noncovalent interaction by evidence of a shorter fluorescence lifetime.

