Synthesis of Piperidine‐based Derivatives as Red Emitting Lu‐minescent Materials

A novel piperidine-based red light material was efficiently constructed through a simple and mild reaction conditions. The color coordinates of 5 a (0.6978, 0.3020) and 5 af (0.6662, 0.3336) were near the standard red coordinates (0.67, 0.33) with extremely high color saturation (5 a: 99.97 %, 5 af: 100 %). Meanwhile, 5 a exhibits reversible redox processes, good electrochemical stability, and good whole transport performance, indicating that it could be potentially developed as red luminescent and hole-transporting material.

Abstract

Organic fluorescent materials have become increasingly attractive due to the requirements of green chemistry. In this study, the synthetic route of piperidine-based fluorescent materials was optimized with good to excellent yields. 37 fluorescent compounds were achieved with emission wavelength at 540–670 nm and chromogenic changed from green to standard red. The fluorescence quantum yields of 5 a, 5 ab, and 5 af were 1.96 %, 0.97 %, and 5.13 %, respectively. The relationship between the structure and luminescent properties has also been systematically discussed. This work presents the possibility of utilizing piperidine analogues to develop fluorescent probes in biological imaging, display devices and other related fields.

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