关键字：DERIVATIVES
摘要：Organic fluorescent materials have attracted increasing attention for their applications in ious 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 emis 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 emi of these compounds can be gradually extinguished. In addition, the fluorescence emi can be recovered under basic conditions. Significant changes in fluorescence emi 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 ious 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.
卷号：214
期号：
是否译文：否