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In practical applications, fixing a fluorescent sensor on a solid composite film matrix can settle the boundaries of keeping the sensor in the solution state. Herein, we first presented a preparation of anime-response membrane by utilizing the edible gelatin as a film-forming skeleton to immobilize the dual phenazine derivative (PD-6), acting as amine-responsive functional units to fabricate a novel solid sensor. In order to ensure the sensor (PD-6 film) is available in the actual application, the mechanical properties, anime-responsive performance, and further application for monitoring shrimp freshness were fully characterized. Those observations indicated that the PD-6 film not only enhanced the sensitivity to anime, but also strengthened the application potential as a solid fluorescent sensor with flexible recyclability and favorable antibacterial properties. It is hoped that this valuable strategy could open a new avenue to overcome the application limitations of the sensor in the solution state. [ABSTRACT FROM AUTHOR]

The development of new strategies for the construction of highly selective and stable vapochromic system is still in great demand. Here, we present a highly selective and stable vapochromic system constructed by pillar[5]arene-based host–guest interactions between a pillar[5]arene (EtP5) and a phenazine derivative. The present material in this work showed specific selective responsiveness to chloroform vapor. The resultant dark orange solid sample was highly stable, which can maintain the color in air for at least two months at room temperature. Moreover, CHCl 3 vapor responsive thin film and light-emitting diode (LED) was successfully prepared by coating the EtP5⊃1 complex on a glass sheet and a commercially available UV-LED. This work provided a new approach for the design and construction of selective and stable vapochromic systems with obvious color changes using pillar[5]arene-based host–guest interactions. • A new approach for the design and construction of vapochromic systems. • The present material showed specific selective responsiveness to CHCl 3. • The resultant dark orange solid material was highly stable. [ABSTRACT FROM AUTHOR]