Novel polymerization of aniline and pyrrole by carbon dots

Maruthapandi, Moorthy; Kumar, Vijay Bhooshan; Porat, Ze’ev; Gedanken, Aharon

doi:10.1039/c7nj03389c

Cited by 52 publications

(67 citation statements)

References 29 publications

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“…Polyethylene glycol (40 mL, PEG-400) was transferred into a 50 mL beaker and placed in a water bath at 70 • C. The tip of an ultrasonic transducer was dipped in the PEG-400 and sonicated for 3 h with a 40% amplitude [11,12,25,26].…”

Section: Preparation Of Cdsmentioning

confidence: 99%

“…Among several conducting polymers, polyaniline (PANI) and polypyrrole (PPY), have received considerable interest because of their unique properties and ease of preparation by chemical or electrochemical methods. PANI and PPY can also be easily prepared using carbon dots (CDs) or nitrogen-doped CDs (N@CDs) as an effective initiator [11,12]. Of importance is the pioneering synthesis and applications of Cu 0.89 Zn 0.11 O (marked here as Zn@CuO, MW = 79.75) as an antibacterial agent [13,14].…”

Section: Introductionmentioning

confidence: 99%

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Antimicrobial Properties of Polyaniline and Polypyrrole Decorated with Zinc-Doped Copper Oxide Microparticles

2020

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Polyaniline (PANI) and polypyrrole (PPY) were synthesized by carbon dots (CDs) under UV irradiation and then sonicated together with zinc acetate and copper acetate to form the PANI-Zn@CuO and PPY-Zn@Cu composites. The former consisted of agglomerated spherical particles with diameters of 1–5 µm, whereas the latter displayed irregular stick shapes with similar diameters. The bacterial potency of the composites against Escherichia coli and Staphylococcus aureus was enhanced remarkably with Zn doping in the CuO matrix, designated as Zn0.11Cu0.89O, at 0.144 mg/mL. The cell death was mainly attributed to the release of reactive oxygen species (ROS) that would severely damage DNA, proteins, and lipids. Bacteria could adhere to neutral surfaces of the composites by van der Waals attractive forces. The binding event disrupted the native surface charge of bacterial cells to induce cell lysis and result in eventual cell death.

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Section: Preparation Of Cdsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Antimicrobial Properties of Polyaniline and Polypyrrole Decorated with Zinc-Doped Copper Oxide Microparticles

2020

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“…Some examples include free radical frontal polymerization, controlled light-mediated radical polymerization, and co-catalyzed polymerization [20][21][22][23]. Polymers with amino functional groups, such as polyaniline, polypyrrole, and poly (4,4 -diaminodiphenyl methane), were synthesized by CDs under UV light as an initiator [24,25]. Two polyether polymers, poly-(4,4 -oxybisbenzenamine) and copolymers involving the poly-(4,4 -oxybisbenzenamine), were synthesized by CDs in the absence of UV light [26].…”

Section: Introductionmentioning

confidence: 99%

Antibacterial Activity against Methicillin-Resistant Staphylococcus aureus of Colloidal Polydopamine Prepared by Carbon Dot Stimulated Polymerization of Dopamine

et al. 2019

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A simple one-step process for the polymerization of dopamine has been developed using nitrogen-doped carbon dots (N@C–dots) as the sole initiator. The synthesized amorphous polydopamine (PDA)-doped N@C–dots (PDA–N@C–dots composite) exhibited a negative charge of –39 mV with particle sizes ranging from 200 to 1700 nm. The stable colloidal solution was active against methicillin-resistant Staphylococcus aureus (MRSA), a Gram-negative bacterium. The strong adhesion of the polymer to the bacterial membrane resulted in a limited diffusion of nutrients and wastes in and out of the cell cytosol, which is a generic mechanism to trigger cell death. Another possible route is the autoxidation of the catechol moiety of PDA to form quinone and release reactive oxygen species (ROS) such as superoxide radicle and hydrogen peroxide, two well-known ROS with antimicrobial properties against both Gram-negative and Gram-positive bacteria.

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“…400-500 nm [33]. Carbon dots (CDs) with negative charges displayed electrostatic interactions with the anilinium ions [34]. The zeta potential of PANI is +42 mV as indicated earlier ( Figure S1).…”

Section: Resultsmentioning

confidence: 57%

“…Preparation of PANI: The PANI is often synthesized by a chemical or electrochemical oxidative method in an acidic medium with ammonium/potassium persulfates as initiators [29][30][31][32][33]. Simple and green synthesis of conducting polymers is carried out with CDs as an initiator [34][35][36][37]. Resulting stable polymers can also be decorated with various metal oxides by facile ultra-sonication to form polymer-metal oxide composites [38][39][40][41].…”

Section: Synthesis Of Cds (Carbon Dots)mentioning

confidence: 99%

Antimicrobial Properties of the Polyaniline Composites against Pseudomonas aeruginosa and Klebsiella pneumoniae

Maruthapandi

Saravanan

Luong

2020

JFB

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CuO, TiO2, or SiO2 was decorated on polyaniline (PANI) by a sonochemical method, and their antimicrobial properties were investigated for two common Gram-negative pathogens: Pseudomonas aeruginosa (PA) and Klebsiella pneumoniae (KP). Without PANI, CuO, TiO2, or SiO2 with a concentration of 220 µg/mL exhibited no antimicrobial activities. In contrast, PANI-CuO and PANI-TiO2 (1 mg/mL, each) completely suppressed the PA growth after 6 h of exposure, compared to 12 h for the PANI-SiO2 at the same concentration. The damage caused by PANI-SiO2 to KP was less effective, compared to that of PANI-TiO2 with the eradication time of 12 h versus 6 h, respectively. This bacterium was not affected by PANI-CuO. All the composites bind tightly to the negative groups of bacteria cell walls to compromise their regular activities, leading to the damage of the cell wall envelope and eventual cell lysis.

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Novel polymerization of aniline and pyrrole by carbon dots

Abstract: This work reports on the synthesis of polymers (polyaniline, polypyrrole, and co-polymerization of polyaniline and polypyrrole) from monomers using carbon dots and UV light as initiators.

Cited by 52 publications

References 29 publications

Antimicrobial Properties of Polyaniline and Polypyrrole Decorated with Zinc-Doped Copper Oxide Microparticles

Antimicrobial Properties of Polyaniline and Polypyrrole Decorated with Zinc-Doped Copper Oxide Microparticles

Antibacterial Activity against Methicillin-Resistant Staphylococcus aureus of Colloidal Polydopamine Prepared by Carbon Dot Stimulated Polymerization of Dopamine

Antimicrobial Properties of the Polyaniline Composites against Pseudomonas aeruginosa and Klebsiella pneumoniae

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