期刊
DYES AND PIGMENTS
卷 162, 期 -, 页码 377-384出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.dyepig.2018.10.030
关键词
Fluorescent probe; Photoinduced electron transfer (PET); Internal charge transfer (ICT); 1,8-Naphthalimide/2-hydroxyphenylhydrazone bichromophore Implication; XOR; XNOR and INHIBIT logic gates; Half-subtractor and digital magnitude comparator
资金
- Science Foundation at the University of Chemical Technology and Metallurgy (Sofia, Bulgaria) [11811/2018, 11818/2018]
- Science foundation of Assiut University (Assiut, Egypt)
New off-on-off' pH chemosensing bichromophore based on 2-hydroxyphenylhydrazone and 1,8-naphthalimide is synthesized. The probe, designed to operate by controlled photoinduced electron transfer (PET) and internal charge transfer (ICT) processes, shows a striking pH dependence of its absorption and emission properties. Due to the 1,8-naphthalimide unit the probe exhibits between pH 6 and 10 a centred at 548 (lambda(ex)= 400 nm) strong yellow-green fluorescence, however, beyond of this pH interval the emission of the probe is quenched. The off-on-off' behaviour of the probe as a function of pH enables it to execute XNOR, IMPLICATION, XOR and INHIBIT logic gates. The INHIBIT logic gate as a borrow digit in conjunction with XOR logic gate as a difference digit executes a half-subtractor. Moreover, the parallel action of logic gates INHIBIT and XNOR executes a digital magnitude comparator.
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