Facile synthesis of gadolinium (III) chelates functionalized carbon quantum dots for fluorescence and magnetic resonance dual-modal bioimaging

Shi, Yupeng; Pan, Yi; Zhong, Jiaming; Yang, Jun; Zheng, Jing; Cheng, Jingliang; Song, Rong; Yi, Changqing

doi:10.1016/j.carbon.2015.05.100

Cited by 105 publications

(78 citation statements)

References 53 publications

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“…The surface functionalization of photocatalysts or photosensitizers can facilitate the separation of electrons and holes, prevent their recombination, and promote charge migration by trapping the photogenerated electrons at a variety of surface sites, which allows for one to control the kinetics of redox reactions. Various methods have been introduced to manipulate the surface functionalization of CDs, as exemplified by coordination/complexation techniques [33], sol-gel techniques [34], covalent bonding strategies, such as amide coupling [35], and π-π interactions [36]. Among the functionalization techniques, acyl chloride ligand exchange replaces carboxyl groups on the CD surface with amine groups.…”

Section: Modification Of Cds For Photocatalysismentioning

confidence: 99%

Recent Developments in Synthesis and Photocatalytic Applications of Carbon Dots

et al. 2020

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The tunable photoluminescent and photocatalytic properties of carbon dots (CDs) via chemical surface modification have drawn increased attention to this emerging class of carbon nanomaterials. Herein, we summarize the advances in CD synthesis and modification, with a focus on surface functionalization, element doping, passivation, and nanocomposite formation with metal oxides, transition metal chalcogenides, or graphitic carbon nitrides. The effects of CD size and functionalization on photocatalytic properties are discussed, along with the photocatalytic applications of CDs in energy conversion, water splitting, hydrogen evolution, water treatment, and chemical degradation. In particular, the enzyme-mimetic and photodynamic applications of CDs for bio-related uses are thoroughly reviewed.

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Section: Modification Of Cds For Photocatalysismentioning

confidence: 99%

Recent Developments in Synthesis and Photocatalytic Applications of Carbon Dots

et al. 2020

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“…Such as, hydrothermal route [73][74][75][76]. Shi et al [77] developed a post-modification route to modified the CDs with DTPA and form the Gd complexes with surface DTPA groups. Recently, Chen et al [78] reported the Gd@CDs prepared from p-phenylenediamine and Gd(NO 3 ) 3 in ethanol by hydrothermal route.…”

Section: Mri and Fi Dual Modal Imagingmentioning

confidence: 99%

Recent advance of carbon dots in bio-related applications

Wang

Bao

et al. 2020

J. Phys. Mater.

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Carbon dots (CDs) is a kind of carbon nanoparticles with a plentiful of surface functional groups and tunable emission with different excitation wavelength. Broadly speaking, CDs include carbon nanodots, carbon quantum dots, graphene quantum dots, carbonized polymer dots. Due to the unique nature, they are explored for various applications in the bio-related fields such as bioimaging, sensor for ion and (bio)molecules, catalyst, LED and other fields. They are viewed as great alternative tracers to the current fluorescent biomarkers in personalized nanomedicine and surgery operation monitoring. In this review, we summarized the recent progress in the development of CDs, including improvement in fluorescence properties, two-photon fluorescence, and integration with other modalities as theragnostic agents. Specifically, we discussed the preparation of dual-modal imaging agents to improve the accuracy of diagnosis, the combination of imaging and targeting functionality for the effective accumulation of biomarkers, and the integration of imaging and therapeutic agents to effectively monitor the localization and concentration of therapeutic agents. Finally, the theragnostic agents composed of three functionalities (e.g. targeting, imaging, and therapy) were summarized to provide readers with future perspectives in this field.

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“…[14][15][16] In 2006, Sun et al first proved that surface passivation of CQDs with poly(ethylene) glycol diamine can remarkably enhance their fluorescence quantum yields. [17][18][19][20] More recently, heteroatom-doped CQDs have attracted much attention, as they can effectively modulate the intrinsic properties of CQDs, such as electronic characteristics and local surface chemical features, and sometimes may provide CQDs with additional properties. 21,22 For example, N-, B-, P-, S-, or Si-doped…”

Section: Introductionmentioning

confidence: 99%

Facile synthesis of N-rich carbon quantum dots from porphyrins as efficient probes for bioimaging and biosensing in living cells

Wang

et al. 2017

IJN

159

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N-rich metal-free and metal-doped carbon quantum dots (CQDs) have been prepared through one-step hydrothermal method using tetraphenylporphyrin or its transition metal (Pd or Pt) complex as precursor. The structures and morphology of the as-prepared nanoparticles were analyzed by X-ray diffraction, high-resolution transmission electron microscopy, X-ray photoelectron spectroscopy, and Fourier transform infrared spectra. Three kinds of nanocomposites show similar structures except for the presence of metal ions in Pd-CQDs and Pt-CQDs indicated by X-ray photoelectron spectroscopy. All of them display bright blue emission upon exposure to ultraviolet irradiation. The CQDs exhibit typical excitation-dependent emission behavior, with the emission quantum yield of 10.1%, 17.8%, and 15.2% for CQDs, Pd-CQDs, and Pt-CQDs, respectively. Moreover, the CQDs, Pd-CQDs, and Pt-CQDs could serve as fluorescent probes for the specific and sensitive detection of Fe 3+ ions in aqueous solution. The low cytotoxicity of CQDs is demonstrated by MTT assay against HeLa cells. Therefore, the CQDs can be used as efficient probes for cellular multicolor imaging and fluorescence sensors for the detection of Fe 3+ ions due to their low toxicity, excellent biocompatibility, and low detection limits. This work provides a new route to synthesize highly luminescent N-rich metal-free or metal-doped CQDs for multifunctional applications.

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Facile synthesis of gadolinium (III) chelates functionalized carbon quantum dots for fluorescence and magnetic resonance dual-modal bioimaging

Cited by 105 publications

References 53 publications

Recent Developments in Synthesis and Photocatalytic Applications of Carbon Dots

Recent Developments in Synthesis and Photocatalytic Applications of Carbon Dots

Recent advance of carbon dots in bio-related applications

Facile synthesis of N-rich carbon quantum dots from porphyrins as efficient probes for bioimaging and biosensing in living cells

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