Straightforward grafting approach for cyclam-functionalized screen-printed electrodes for selective Cu(II) determination

Jasmin, Jean-Philippe; Ouhenia-Ouadahi, Karima; Miserque, F.; Dumas, Eddy; Cannizzo, Caroline; Chaussé, A.

doi:10.1016/j.electacta.2016.03.141

Cited by 15 publications

(15 citation statements)

References 47 publications

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“…This increase from 399.7 eV (Fe 3 O 4 –LDOPA–PEG NPs) to 400.0 eV (Fe 3 O 4 –LDOPA–PEG–MANOTA NPs) can be attributed to the CN contributions of MANOTA cycles, which have similar (cyclic) structure to other polyazamacrocycles for which similar behavior has already been observed in literature. 54 XPS data confirm the grafting of p -NCS-Bz-MANOTA on the NPs surface (Fe 3 O 4 –LDOPA–PEG). These results show that NH 2 and COOH groups of LDOPA (after the continuous hydrothermal synthesis of magnetite NPs) are free and available for grafting other molecules, like in this case PEG and MANOTA, both present on the surface of NPs.…”

Section: Resultssupporting

confidence: 54%

Innovative Magnetic Nanoparticles for PET/MRI Bimodal Imaging

et al. 2019

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Superparamagnetic iron oxide nanoparticles were developed as positron emission tomography (PET) and magnetic resonance imaging (MRI) bimodal imaging agents. These nanoparticles (NPs), with a specific nanoflower morphology, were first synthesized and simultaneously functionalized with 3,4-dihydroxy- l -phenylalanine (LDOPA) under continuous hydrothermal conditions. The resulting NPs exhibited a low hydrodynamic size of 90 ± 2 nm. The functional groups of LDOPA (−NH 2 and −COOH) were successfully used for the grafting of molecules of interest in a second step. The nanostructures were modified by poly(ethylene glycol) (PEG) and a new macrocyclic chelator MANOTA for further 64 Cu radiolabeling for PET imaging. The functionalized NPs showed promising bimodal (PET and MRI) imaging capability with high r 2 and r 2 * ( T 2 and T 2 * relaxivities) values and good stability. They were mainly uptaken from liver and kidneys. No cytotoxicity effect was observed. These NPs appear as a good candidate for bimodal tracers in PET/MRI.

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Section: Resultssupporting

confidence: 54%

Innovative Magnetic Nanoparticles for PET/MRI Bimodal Imaging

et al. 2019

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“…Subsequently, complexes of these ligands have potential to be utilised for medical imaging and therapy, such as anti-HIV drugs [1][2][3][4], magnetic resonance imaging (MRI) contrast agents [5] and positron emission tomography (PET) theranostic compounds [6][7][8][9]. The strong affinity that these ligands have for important metal ions, such as copper(II), has seen them becoming increasingly used in the formation of sensors for either environmental analysis or cellular studies [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

1,8-bis(2-hydroxy-3,5-di-tert-butylbenzyl)-4,11-dibenzyl-1,4,8,11-tetraazacyclotetradecane

Leiva

Kaur

Benjamin

et al. 2017

Molbank

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A cyclam (1,4,8,11-tetraazacyclotetradecane)-based macrocycle bearing two benzyl and two 2-hydroxy-3,5-di-tert-butylbenzyl pendent arms was synthesized and characterized using spectroscopic techniques and single crystal X-ray diffraction. The macrocycle crystallizes in the triclinic space group P-1, with the asymmetric unit containing one-half of the molecule. The structure is stabilized by hydrogen-bonding which exists between the phenolic protons and the nitrogen atoms of the macrocyclic ring. The presence of this hydrogen bonding is observed in the 1 H-NMR due to the deshielded nature of the phenolic OH peak (δ 9.99). Cyclic voltammetry of the ligand revealed a single quasi-reversible peak at −0.58 V (E pc = −0.48 V and E pa = −0.68 V), which is due to the electrochemical oxidation of the phenol to the phenoxyl radical.

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“…Covalent modifications, while not common, have been made to carbon fiber microelectrodes (CFMs), CPEs, GCEs, , CNTs, , and SPEs , for increased sensitivity and selectivity for heavy metal detection.…”

Section: Carbon As a Versatile And Sustainable Electrode Materials Fo...mentioning

confidence: 99%