Quantum size effect of poly(o-phenylenediamine) quantum dots: From controllable fabrication to tunable photoluminescence properties

Yan, Shuai; Yang, Siwei; Lin, He; Ye, Caichao; Song, Xun; Liao, Fang

doi:10.1016/j.synthmet.2014.10.014

Cited by 41 publications

(21 citation statements)

References 78 publications

(105 reference statements)

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“…In the last ten years, poly(o-phenylenediamine) (POPD) was intensively studied, with several applications being reported in the following area: (i) fuel cells [ 1 ], (ii) sensors [ 2 , 3 ], (iii) solar cells [ 4 ], lithium-ion batteries [ 5 ] and so on. Depending on the oxidizing agents used in chemical polymerization, i.e., K 2 Cr 2 O 7 and HCl, CuCl 2 , (NH 4 ) 2 S 2 O 8 , H 2 O 2 or FeCl 3, the POPD morphological structures of the type of ellipsoidal particles [ 6 ], micro-belts [ 7 ], quantum dots [ 8 ], fiber like microstructures with square prism shapes [ 9 ] and microfibers [ 10 ], respectively, were reported. A wide range of POPD-based composites have been synthesized in the presence of various oxides (e.g., TiO 2 [ 11 ], ZnO [ 12 ]) or carbon nanoparticles (e.g., carbon nanohorns [ 13 ], reduced graphene oxide [ 14 ], carbon nanohollow [ 15 ], carbon nanotubes [ 16 , 17 ]).…”

Section: Introductionmentioning

confidence: 99%

Optical Properties of Composites Based on Poly(o-phenylenediamine), Poly(vinylenefluoride) and Double-Wall Carbon Nanotubes

Baibarac

Daescu

Matei

et al. 2021

IJMS

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In this work, synthesis and optical properties of a new composite based on poly(o-phenylenediamine) (POPD) fiber like structures, poly(vinylidene fluoride) (PVDF) spheres and double-walled carbon nanotubes (DWNTs) are reported. As increasing the PVDF weight in the mixture of the chemical polymerization reaction of o-phenylenediamine, the presence of the PVDF spheres onto the POPD fibers surface is highlighted by scanning electron microscopy (SEM). The down-shift of the Raman line from 1421 cm−1 to 1415 cm−1 proves the covalent functionalization of DWNTs with the POPD-PVDF blends. The changes in the absorbance of the IR bands peaked around 840, 881, 1240 and 1402 cm−1 indicate hindrance steric effects induced of DWNTs to the POPD fiber like structures and the PVDF spheres, as a consequence of the functionalization process of carbon nanotubes with macromolecular compounds. The presence of the PVDF spheres onto the POPD fiber like structures surface induces a POPD photoluminescence (PL) quenching process. An additional PL quenching process of the POPD-PVDF blends is reported to be induced in the presence of DWNTs. The studies of anisotropic PL highlight a change of the angle of the binding of the PVDF spheres onto the POPD fiber like structures surface from 50.2° to 38° when the carbon nanotubes concentration increases in the POPD-PVDF/DWNTs composites mass up to 2 wt.%.

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Section: Introductionmentioning

confidence: 99%

Optical Properties of Composites Based on Poly(o-phenylenediamine), Poly(vinylenefluoride) and Double-Wall Carbon Nanotubes

Baibarac

Daescu

Matei

et al. 2021

IJMS

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“…Recently, isomers of phenylenediamine (PD), such as o -, m -, and p -PD, had been studied as carbon sources to prepare CDs [ 8 , 9 , 23 , 24 ]. Blue-, green-, and red-emitting CDs can be prepared from m -, o -, and p -PD ethanol solution, respectively [ 23 ].…”

Section: Introductionmentioning

confidence: 99%

Sulfuric Acid Assisted Preparation of Red-Emitting Carbonized Polymer Dots and the Application of Bio-Imaging

et al. 2018

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Red-emitting carbonized polymer dots (CPDs) was prepared from p-phenylenediamine (p-PD) aqueous solution with the assistance of sulfuric acid (H2SO4), and the optical properties and bio-imaging application were studied in this paper. Compared with other strong acids-assisted systems, SA-CPDs (prepared from H2SO4-assisted system, average diameter is ~ 5 nm) is the brightest. The photoluminescence Quantum Yields (QYs) is 21.4% (in water), and the product yield is 16.5%. SA-CPDs aqueous solution emits at 600 nm when excited by the light from 300 to 580 nm. The emission wavelength is independent on the excitation wavelength. Formation energies of CPDs in two ways were calculated to show that longitudinal growth (forming polymers) is difficult, and the transverse growth (forming CPDs) is easy. In addition, the two-photon photoluminescence properties (emitting at 602 nm when excited by 850 nm femtosecond pulse laser) of SA-CPDs were also utilized in the experiments for HeLa cells staining and shown to have potential applications in bio-imaging.Electronic supplementary materialThe online version of this article (10.1186/s11671-018-2657-4) contains supplementary material, which is available to authorized users.

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“…The oxidation of OPD is extremely important since it has advantages in preparing conductive polymers [20,21] and in synthesizing carbon dots [22,23]. The colorless OPD can be oxidized into the fluorescent product OPDox, which develops a yellow color in solution.…”

Section: Introductionmentioning

confidence: 99%

Real-Time Sensing of O-Phenylenediamine Oxidation on Gold Nanoparticles

Sun²,

Song³

et al. 2017

Sensors

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Real-time monitoring of chemical reactions is still challenging as well as important to study reaction mechanisms and reaction kinetics. Herein, we demonstrated the real-time monitoring of o-phenylenediamine (OPD) oxidation on the surface of gold nanoparticles by surface-enhanced Raman spectroscopy (SERS). The oxidation mechanism and the reaction kinetics were investigated on the basis of the SERS spectrum variation and the related density functionalized theory calculation. It was shown that the oxidation of OPD in the presence of copper ions was a two-step process of the deprotonation of the amino group on the aromatic rings and the rearrangement of the electron cloud to a π-conjugated system, which may open a new door to comprehensively understand the reaction process.

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Quantum size effect of poly(o-phenylenediamine) quantum dots: From controllable fabrication to tunable photoluminescence properties

Cited by 41 publications

References 78 publications

Optical Properties of Composites Based on Poly(o-phenylenediamine), Poly(vinylenefluoride) and Double-Wall Carbon Nanotubes

Optical Properties of Composites Based on Poly(o-phenylenediamine), Poly(vinylenefluoride) and Double-Wall Carbon Nanotubes

Sulfuric Acid Assisted Preparation of Red-Emitting Carbonized Polymer Dots and the Application of Bio-Imaging

Real-Time Sensing of O-Phenylenediamine Oxidation on Gold Nanoparticles

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