Tetramer of aniline as a structural analog of polyaniline – Promising material for biomedical application

Yagudaeva, E. Yu.; Vikhrov, A. A.; Malakhova, Yu. N.; Iskandyarova, Y. G.; Firsova, M.M.; Prostyakova, A. I.; Коровин, А. Н.; Малахов, С. Н.; Nichugovskiy, Artemiy; Zubov, V.P.; Капустин, Д. В.

doi:10.1016/j.synthmet.2021.116712

Cited by 12 publications

(6 citation statements)

References 20 publications

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Section: Resultsmentioning

confidence: 99%

“…Consequently, it possess unique electrical, chemical, and optical properties and has numerous advanced applications including bioseparating materials, electrochemical sensors, supercapacitors, and mediators for enhancing differentiation of neural stem cells or facilitating the photothermal effect for cancer therapy. 21,[27][28][29][30] The as-prepared aniline tetramer in this study was in protondoping state because of synthesizing in HCl solution. Subsequently, it was washed with ammonium hydroxide solution to become un-doping state for spider silk modication.…”

Section: Characterization Of Synthesized Aniline Tetramermentioning

confidence: 99%

“…19,20 However, the poor solubility in common solvents makes polyaniline difficult to process. 21 In this study, we utilized the aniline tetramer, which is the smallest aniline oligomer that can have the same oxidation-reduction/dopingundoping structures as polyaniline, 22 to develop electroactive spider silks with appreciable electrical conductivity for potential applications in E-textiles. We demonstrated the feasibility, for the rst time, that a simple dip coating method can modify the surface of spider dragline silk with aniline tetramer to impart the conductivity and electroactivity to the composite bers.…”

Section: Introductionmentioning

confidence: 99%

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Electroactive aniline tetramer–spider silks with conductive and electrochromic functionality

Wan

Chen

et al. 2022

RSC Adv.

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Section: Resultsmentioning

confidence: 99%

Section: Characterization Of Synthesized Aniline Tetramermentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Electroactive aniline tetramer–spider silks with conductive and electrochromic functionality

Wan

Chen

et al. 2022

RSC Adv.

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“…Phenyl/phenyl end-capped tetraaniline in the leucoemeraldine oxidation state (TANI-LEB) was prepared by a reaction of dianiline ( N -phenyl-1,4-phenylenediamine) with hydroquinone and titanium (IV) n -butoxide as a condensing reagent. The structure of the obtained compound was confirmed using ultraviolet (UV), visible (vis), infrared (IR), mass, and nuclear magnetic resonance (NMR) spectroscopy, as described in ref .…”

Section: Methodsmentioning

confidence: 99%

Phase Transition in a Tetraaniline/Nanosilicon Composite Film Detected by Impedance Spectroscopy

Kononov,

Yagudaeva,

Voronov

et al. 2023

J. Phys. Chem. C

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The composite films of phenyl/phenyl end-capped tetraaniline emeraldine salt (TANI-ES) and nanocrystalline silicon (nc-Si) TANI-ES/nc-Si were obtained using a drop-casting method by deposition from the solutions onto the substrates with metal electrodes. A comprehensive analysis of the impedance spectra of the TANI-ES/nc-Si composite film at the temperature range of 20−130 °C has been carried out. For the first time, it was found that there are two temperature ranges in which the impedance spectra are completely different. At the border of these ranges at temperature T* ≈ 101.5 °C, the impedance spectra exhibit a pronounced inductive character. Differential scanning calorimetry (DSC) measurements showed that two phase transitions occur in the TANI-ES/nc-Si composite at temperatures of 94 and 145 °C. An analysis of X-ray diffraction patterns revealed that the crystal structure of the TANI-ES/nc-Si composite is unstable upon heating to 140 °C in a nitrogen atmosphere, and the degree of this instability depends on the ratio of the number of TANI molecules per one nanoparticle. The temperature dependence of the DC conductivity changes sharply at a temperature of about 100 °C. The temperature dependences of the fitting parameters used to fit the experimental impedance curves also change significantly at 100 °C. Such changes in the electrical characteristics can be explained by a second-order phase transition in the TANI-ES/nc-Si composite at temperatures of about 100 °C. The Nyquist plot of the impedance of the TANI-ES/nc-Si composite has an inductive character at T* ≈ 101.5 °C, and we believe that such a character may indicate a phase transition in this composite. The conductivity spectra of the TANI-ES/nc-Si film at all investigated temperatures, except for 101.5 °C, are well approximated by the sum of the power law, polaron, and DC conductivities. However, the film conductivity at T* ≈ 101.5 °C has a local maximum at about 10 Hz, and this maximum cannot be approximated by standard functions used in impedance spectroscopy to fit conductivity curves in the RF region. It has been shown for the first time that a good approximation is the Drude−Smith formula, which has been successfully used to approximate conductivity spectra in the terahertz range of the spectrum. An exact approximation of the spectra ε′(ν) and ε″(ν) in the entire temperature range, except for temperature T*, is achieved by a combination of the Debye and Cole−Cole functions and the component determined by free charges. At temperature T*, in order to approximate the spectra ε′(ν) and ε″(ν), in addition to the indicated combination of functions, it is also necessary to use the Drude−Smith function.

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“…Interestingly, an electrochemiluminescence imaging method based on polyluminol has been developed to display potential fingerprints, which is of great significance for criminal detection [12]. Polyaniline (PANI) has been paid much attention because of its high electrical conductivity, excellent biocompatibility and controllable nanostructures [13,14], and it has been used to copolymerized with luminol to develop ECL sensors [15,16]. The polyanilineluminol nanocomposites can offer superior specific surface area to facilitate biomolecule immobilization.…”

Section: Introductionmentioning

confidence: 99%

Electrochemiluminescence DNA Biosensor for HBV Based on Coralloid Poly(Aniline‐Luminol)‐MWCNTs and Catalysis of Ferrocene

et al. 2022

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A novel electrochemiluminescence biosensor was presented for the assay of hepatitis B virus (HBV) DNA. Coralloid poly(aniline‐luminol)‐MWCNTs was prepared on an electrode surface, which was followed by the attachment of capture DNA via amide bond formation. The HBV‐DNA and ferrocene labelled DNA hybridized with capture DNA to form a sandwich structure on electrode surface. Ferrocene can effectively increase the signal output of the ECL sensor due to the catalysis of ferrocene on electrochemiluminescence of luminol. The biosensor rendered a linear dependence over the range from 1.0×10−16 to 1.0×10−7 M with a low detection limit of 2.4×10−17 M.

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Tetramer of aniline as a structural analog of polyaniline – Promising material for biomedical application

Cited by 12 publications

References 20 publications

Electroactive aniline tetramer–spider silks with conductive and electrochromic functionality

Electroactive aniline tetramer–spider silks with conductive and electrochromic functionality

Phase Transition in a Tetraaniline/Nanosilicon Composite Film Detected by Impedance Spectroscopy

Electrochemiluminescence DNA Biosensor for HBV Based on Coralloid Poly(Aniline‐Luminol)‐MWCNTs and Catalysis of Ferrocene

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