Abstract
Organic fluorescent materials have attracted increasing attention for their applications in various fields. Design and synthesis of multifunctional organic fluorescent emitters based on simple molecular structure are still highly demanded and challenging. In this paper, we designed and synthesized six organic fluorescent molecules with polyaryl substituted imidazobenzothiadiazole structure. The substituents on imidazole ring have important effects on the optical properties. Compounds with N, N-dialkyl aniline moieties on imidazole ring could show obvious solvatochromic properties with relatively large Stokes shifts and low quantum yields. However, the fluorescent emissions of other compounds with phenol, 4-methoxy phenyl or methyl groups on imidazole ring are almost unaffected by the solvent polarity, and they can exhibit higher fluorescent quantum yields. Under acidic conditions, the fluorescence emission of these compounds can be gradually extinguished. In addition, the fluorescence emission can be recovered under basic conditions. Significant changes in fluorescence emission indicate that these molecules can be used as anti-counterfeiting inks. Further investigation showed that the compound with methyl group on imidazole ring can be used for latent fingerprint development. High-contrast fingerprint images are obtained on various substrate surfaces. It is also found that the compound with phenol moiety on imidazole ring can be utilized for lysosomes imaging in living cells accurately with high efficiency. This work provides a series of imidazobenzothiadiazole-based multifunctional organic materials with potential applications in security inks, latent fingerprint imaging and lysosome staining.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.