Microwave-assisted facile synthesis of yellow fluorescent carbon dots from o-phenylenediamine for cell imaging and sensitive detection of Fe3+ and H2O2

Song, Li; Cui, Yanyan; Zhang, Chunfang; Hu, Zhongbo; Liu, Xiangfeng

doi:10.1039/c6ra02554d

Cited by 121 publications

(85 citation statements)

References 58 publications

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“…It is worthy to note here that HNO 3 plays a vital role in the formation of the high efficient red fluorescent CPDs, because other acid like H 2 SO 4 , H 3 PO 4 , etc., did not work. And it has been reported that o PD were used as carbon source alone to prepare green or yellow but no red photoluminescent CDs through the solvothermal method or hydrothermal method without acid . Thus, HNO 3 is the biggest difference between those green or yellow photoluminescent CDs and our red fluorescent CPDs in synthetic conditions, and is also the key factor in synthesizing red emissive CPDs.…”

Section: Resultsmentioning

confidence: 99%

One‐Step Hydrothermal Synthesis of Nitrogen‐Doped Conjugated Carbonized Polymer Dots with 31% Efficient Red Emission for In Vivo Imaging

Liu

Zhang

et al. 2018

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Carbon dots with long-wavelength emissions, high quantum yield (QY) and good biocompatibility are highly desirable for biomedical applications. Herein, a green, facile hydrothermal synthesis of highly efficient red emissive nitrogen-doped carbonized polymer dots (CPDs) with optimal emission at around 630 nm are reported. The red emissive CPDs possess a variety of superior properties including excellent water dispersibility, good biocompatibility, narrow bandwidth emission, an excitation-independent emission, and high QY (10.83% (in water) and 31.54% (in ethanol)). Further studies prove that such strong red fluorescence is ascribed to the efficient conjugated aromatic π systems and hydrogen bonds of CPDs. And the fluorescence properties of CPDs can be regulated by adjusting the dosage of HNO before the reaction. Additionally, the as-prepared CPDs are successfully used as a fluorescent probe for bioimaging, both in vitro and in vivo. More importantly, biodistribution results demonstrate that most CPDs and their metabolites are not only excreted in urine but also excreted by hepatobiliary system in a rapid manner. Besides, the CPDs could easily cross the blood brain barrier, which may provide a valuable strategy for the theranostics of some brain diseases through real-time tracking.

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Section: Resultsmentioning

confidence: 99%

One‐Step Hydrothermal Synthesis of Nitrogen‐Doped Conjugated Carbonized Polymer Dots with 31% Efficient Red Emission for In Vivo Imaging

Liu

Zhang

et al. 2018

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340

246

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“…The peaks at 1060 and 1220 cm −1 correspond to the C−O vibrational absorption band and C−O stretching vibrations, respectively ,,. The peaks at 1700, 1570, 1390 and 1340 cm −1 are assigned to the stretching vibrations of C=O, asymmetric vibration of COO − , bending vibrations of ‐OH and vibrational absorption band of C−N, respectively . The hydroxyl and carboxyl groups decorated on CDs surface lead to their good water solubility, and the ‐NH x group usually exhibits strong interaction with the surrounding heavy metal ions, which can be used for the fluorescent detection of metal ions ,…”

Section: Resultsmentioning

confidence: 99%

A Carbon‐Dot‐Based Fluorescent Probe for the Sensitive and Selective Detection of Copper(II) Ions

et al. 2019

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Fluorescent carbon dots (CDs) are widely applied for the detection of heavy metal ions due to their nontoxicity, high sensitivity and stability. In this work, CDs were synthesized by a simple and green pyrolysis method without complicated postprocessing procedures and characterized by transmission electron microscope, X-ray diffraction, fourier transform infrared spectroscopy, UV-visible spectrophotometer and fluorescence spectroscopy. The CDs exhibited a relatively narrow size distribution of 3.5-8.6 nm with an average size of 6.1 nm and their surface was decorated with abundant functional groups such as hydroxy and amino groups. They exhibited a strong fluorescent peak at 468 nm with a quantum yield of 25% under 365 nm UV irradiation. The CDs exhibited a strong fluorescence response to 70 μM Cu 2 + with the sensitivity up to 77% due to the complexation between the amino groups decorated on the CD surface and the adsorbed copper ions. They also exhibited short response times of less than 1 min, high response selectivity and good stability. Results and discussion Characterization of CDsThe morphology of the as-prepared CDs was firstly observed by a TEM, as shown in figure 1 A). Some CDs exhibit nearly spherical structure and others exhibit irregular structure. The partially enlarged image of a CD exhibits distinct lattice structure with the lattice spacing of 0.29 nm, which corresponds to the (020) crystal surface. [30] The CDs exhibit a narrow [a] Dr.

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“…CDs were first discovered in the year 2004 when single‐wall carbon nanotubes were electrophoretically purified with several carbon dots qualities such as durability, stability, ease of being functionalized, fluorescence emission, biocompatibility and low toxicity, they possess the capacity to improve the environment and human health . The aforementioned properties and intrinsic characteristics of CDs, have thus made it a needful resource in the fields of scientific research such as; optoelectronics,, environmental pollution and remediation purposes, biosensor bio‐imaging and biomedical applications …”

Section: Introductionmentioning

confidence: 99%

“…Although, numerous synthesis processes have been established for producing carbon dots, however, issues of sustainability have been raised regarding severe synthesis requirements, extreme engineered conditions, and post treatment steps . For instance, the importance of CDs in medical and environmental applications is well known.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Fluorescent Carbon Dots from Tapioca

et al. 2019

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This research demonstrates an economical and efficient reduction of carbon foot print. Tapioca powder as a source of organic carbon was utilized in the synthesis of carbon dots through optimization of the synthesis parameters such as temperature, dosage and time. Photoluminescent quantum yield (PLQY) was obtained under the visible region of 340 nm at 34.9%, which was achieved without dopants such as sulfur and nitrogen that are popularly used to increase the value of photoluminescence. The characterization of carbon dots such as FTIR and HrTem, were carried out for the analysis of functional groups, particle sizes (1‐5 nm) and shapes (quasi‐spherical). The high carbon‐carbon bonds and oxygen groups detected in FTIR analysis validates the basis of fluorescence of carbon dots and also presence of hydroxyl (OH), carboxylic acids (COO), and other vital functional groups (C=O, C−O‐C, C−H). These characteristics makes tapioca based carbon dots suitable for application in the fields of environmental studies including sensitive detection and absorbance of pollutants in water and bio imaging in health sciences.

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Microwave-assisted facile synthesis of yellow fluorescent carbon dots from o-phenylenediamine for cell imaging and sensitive detection of Fe³⁺ and H₂O₂

Abstract: CDs synthesized from o-phenylenediamine through microwave-assisted method show great potential for Fe3+ and H2O2 detection as well as cell imaging.

Cited by 121 publications

References 58 publications

One‐Step Hydrothermal Synthesis of Nitrogen‐Doped Conjugated Carbonized Polymer Dots with 31% Efficient Red Emission for In Vivo Imaging

One‐Step Hydrothermal Synthesis of Nitrogen‐Doped Conjugated Carbonized Polymer Dots with 31% Efficient Red Emission for In Vivo Imaging

A Carbon‐Dot‐Based Fluorescent Probe for the Sensitive and Selective Detection of Copper(II) Ions

Synthesis and Characterization of Fluorescent Carbon Dots from Tapioca

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