In this work, a 2H-pyran-2-one-functionalized diketopyrrolopyrrole (DPP) (coded as receptor 1) was designed, synthesized, and fully characterized by various spectroscopic methods. The physical properties of molecular architecture 1 were studied employing theoretical calculations. Receptor 1 was elegantly scrutinized for the sensing of explosive nitroaromatic compounds (NACs). Receptor 1 exhibited detection of nitro explosives, i.e., picric acid (PA), 2,4-dinitrophenol (DNP), and nitrophenol (NP), via the fluorescence quenching mechanism. The Stern−Volmer equation was employed to evaluate the effectiveness of the quenching process. It was found that 1 exhibited a detection limit of about 7.58 × 10 −5 , 8.35 × 10 −5 , and 9.05 × 10 −5 M toward PA, DNP, and NP, respectively. The influence of interfering metal ions and anions on PA detection was investigated thoroughly. Furthermore, receptor 1-based low-cost fluorescent thin-layer chromatography (TLC) plates were developed for the recognition of PA.
In this paper, we described the design, synthesis, and characterization of two novel naphthalene diimide (NDI) core-based targets modified with terminal fullerene (C 60 ) yield -so called S4 and S5, in which NDI bearing 1 and 2 molecules of C 60 , respectively. The absorption, electrochemical and thin-film transistor characteristics of the newly developed targets were investigated in detail. Both S4 and S5 displayed broad absorption in the 450-500 nm region, owing to the effect of conjugation due to fullerene functionalities. The electrochem-ical measurement suggested that the HOMO and the LUMO energy levels can be altered with the number of C 60 units. Both S4 and S5 were employed as organic semiconductor materials in n-channel transistors. The thin film transistor based on S4 exhibited superior electron mobility (μe) values ranging from 1.20 × 10 À 4 to 3.58 × 10 À 4 cm 2 V À 1 s À 1 with a current on-off ratio varying from 10 2 to 10 3 in comparison with the performance of S5 based transistor, which exhibited μe ranging from 8.33 × 10 À 5 to 2.03 × 10 À 4 cm 2 V À 1 s À 1 depending on channel lengths.
A new series of nucleobase adenine (A) functionalized naphthalene diimide (NDI) derivatives to form a donor-acceptor conjugate has been designed, synthesized and characterized. The photoinduced electron transfer from A to...
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