Synthesis of an Acidochromic and Nitroaromatic Responsive Hydrazone‐Linked Pillararene Framework by a Macrocycle‐To‐Framework Strategy

Abstract

AbstractTailoring the properties of solid‐state organic luminescent materials using a bottom‐up design principle is highly desirable for many applications. Herein, we present a “macrocycle‐to‐framework” strategy to construct macrocycle‐functionalized and hydrazone‐linked functional organic polymers with bright yellowish‐green luminescence and unique solvatochromism behaviors by the condensation of a diacylhydrazine‐functionalized pillar[5]arene with tris(4‐formylbiphenyl)amine. Outperforming their non‐macrocycle‐incorporated counterparts, the pillar[5]arene‐containing materials display amplified sensitivity to acidic conditions with luminescent and colorimetric dual‐modal patterns assisted by the enhanced intramolecular charge transfer (ICT), and exhibit satisfactory responsiveness to nitrobenzene compounds through rapid luminescence quenching with high selectivity and a low detection limit, where the sensing process proceeds through multiple dynamic quenching pathways.