A simple naphthalene diimide-based hydrogen-bonded supramolecular compound for photo/electrochromism, ammonia sensing, inkless erasable printing

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Stimuli-responsive materials, as an emerging class of functional materials, can achieve reversible transformations under external stimuli. In this study, a simple naphthalene diimide-based hydrogen-bonded supramolecular compound, namely [(H4BINDI)0.5·H2O]n (1), (H4BINDI=N,N’-bis(5-isophthalic acid)-1,4,5,8-naphthalene diimide) was synthesized by a solvothermal method. 1 exhibited rapid photo/electrochromic properties and photocontrolled luminescence properties. Moreover, 1 has high sensitivity to ammonia, making it an excellent material for amine detection. Additionally, the fast discoloration properties make 1 to be appropriate for use in inkless and erasable printing, as well as anti-counterfeiting purposes. Furthermore, TDDFT provides theoretical support for the color-changing behavior. This work provides an effective strategy for the construction of multifunctional stimuli-responsive materials.

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