期刊
NEW JOURNAL OF CHEMISTRY
卷 39, 期 1, 页码 492-500出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4nj01908c
关键词
-
资金
- National Natural Science Foundation of China [21172160, 21372169]
A series of luminescent salicylaldehyde azines (SAs) containing different electron-accepting substituents (-NO2, -F, and -Cl), electron-donating substituents (-OMe and -NEt2), and a pi-extended system (naphthalene ring) are prepared for the application of fluorescent pH probes. These SAs inheriting the aggregation-induced emission (AIE) features display strong blue, green, and red fluorescence with large Stokes shifts in water and solid medium. Combining the advantages of AIE and the chemical reactivity of phenol towards OH-/H+, most of the SAs can be used as ratiometric fluorescent pH probes with a broad pH range (2-14) in water and solid medium (test paper). Moreover, the inherent relationship between their chemical structures and AIE properties/pK(a) values (7.5-13.3) is studied, which provides unequivocal insights into the design of AIE-active dyes and their applications.
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