Coordination compounds built on metal surfaces

Cao, Roberto; Díaz-García, Alicia

doi:10.1016/j.ccr.2008.08.010

Cited by 39 publications

(23 citation statements)

References 153 publications

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“…22,23 The major structural characteristic of DTC is the resonance structure among N−C−S 2 , including both the sulfur−carbon bond and the carbon−nitrogen bond due to the free electron pairs on the sulfur and nitrogen atoms. 24 Carbon disulfide can react with the amine group of a compound, forming DTC on a gold surface at room temperature. 25−27 In that case, a compound with an amine group can be immobilized on a gold surface by simple immersion of the gold substrate in a solution containing CS 2 and the target molecule.…”

Section: Introductionmentioning

confidence: 99%

Antibody Oriented Immobilization on Gold using the Reaction between Carbon Disulfide and Amine Groups and Its Application in Immunosensing

et al. 2012

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Carbon disulfide (CS 2 ) can spontaneously react with amine groups to form dithiocarbamates on gold surface, providing the possibility to immobilize some compounds with primary or secondary amine groups in one step. Using this principle, an immunosensor interface prepared for immunoglobulin G (IgG) sensing surface toward anti-IgG has been fabricated for the first time by simply immersing gold slides into a mixed aqueous solution of CS 2 and protein A, followed by incubation in immunoglobulin G solution. The reaction between CS 2 and protein A has been followed by UV−vis spectroscopy, whereas cyclic voltammetry has been employed in the characterization of the modified gold surface with CS 2 and protein A, both methods indicating that protein A immobilization is implemented by CS 2 . Conventional ellipsometry, atomic force microscopy (AFM), as well as surface plasmon resonance (SPR) have been used to evaluate the specific binding of protein A with IgG and IgG with anti-IgG, revealing that IgG is specifically captured to form the biosensing interface, maintaining its bioactivity. Compared to direct adsorption of IgG on the gold surface, the IgG sensing surface constructed of CS 2 and protein A is far more sensitive to capture anti-IgG as its target molecule. In addition, the modified surface is proven to have good capability to inhibit nonspecific adsorption, as supported by control experiments using lysozyme and BSA. To conclude, antibody immobilization using this one-step method has potential as a simple and convenient surface modification approach for immunosensor development.

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Section: Introductionmentioning

confidence: 99%

Antibody Oriented Immobilization on Gold using the Reaction between Carbon Disulfide and Amine Groups and Its Application in Immunosensing

et al. 2012

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“…Tuning of the LSPR properties can be achieved through synthesis by exploiting differences in nanoparticle size, geometry, surface morphology, aggregation, aspect ratio, and the dielectric constant of the surrounding media [15,33,[35][36][37][38][39][40][41][42][43][44][45]. Since each application relies on a specific set of conditions for optimized efficiency, the structural parameters of the nanoparticles employed for use must be tailored accordingly.…”

Section: Metal Nanostructuresmentioning

confidence: 99%

Controllable Cobalt Oxide/Au Hierarchically Nanostructured Electrode for Nonenzymatic Glucose Sensing

2016

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By electrodeposition and galvanic replacement reaction, we developed a facile, time-saving, cost-effective, and environmentally friendly, two-step synthesis route to obtain a controllable cobalt oxide/Au hierarchically nanostructured electrode for glucose sensing. The nanomaterials were characterized by transmission electron microscopy, scanning electron microscopy, Raman spectroscopy, energy-dispersive spectrometry, and X-ray photoelectron spectroscopy, meanwhile, the sensing performance was investigated by cyclic voltammetry and amperometric response. The results revealed that this novel electrode exhibited excellent electrocatalytic performance toward glucose oxidation, with a wide double-linear range from 0.2 μM to 20 mM and a low detection limit of 0.1 μM based on a signal-to-noise ratio of 3, which was mainly attributed to the ability of loading a small amount of Au with good electron conductivity on the surface of cobalt oxide nanosheets with large active surface area and synergistic electrocatalytic activity of Au and cobalt oxide toward glucose electrooxidation. This facile, sensitive, and selective glucose sensor is also proven to be suitable for the detection of glucose in human serum.

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“…By solving the Maxwell equations for the interaction of light with nanoparticles of radius much smaller than the electromagnetic wavelength, Mie,22 in 1908, successfully derived the theoretical equation 8 for s ext (8) where V = (4π/3)R 3 is the volume of the spherical particle and c is the velocity of light. The plot of the s ext values as a function of the excitation frequency gives the extinction spectra of the nanoparticles including the plasmon transitions.…”

Section: Extinction Spectra Of Gold Nanoparticlesmentioning

confidence: 99%

“…4 A close parallelism between gold nanoparticles and gold electrodes arises from the previous studies involving the binding of coordination compounds and ligands such as 4-mpy to corrugated gold surfaces. 8,29,30,62 For instance, Moreira and coworkers 29,30,63 investigated the adsorption of the [M(CN) 5 (4-mpy)] n-complex (M = Fe II , Ru II ) on gold, silver and copper electrode surfaces using surface enhanced Raman spectroscopy. They reported significant changes in the relative intensities of the vibrational modes of pyS and CN ligands, reflecting the occurrence of chemical interactions involving both ligands and the metal surface.…”

Section: Assembling Coordination Compounds At Gold Nanoparticles Surfacementioning

confidence: 99%

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The coordination chemistry at gold nanoparticles

Toma¹,

Zamarion²,

Toma³

et al. 2010

J. Braz. Chem. Soc.

119

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Nas nanopartículas de ouro, as propriedades químicas e físicas são ditadas principalmente pelos átomos da superfície, os quais podem interagir com espécies doadoras-aceitadoras, ou ligantes, da mesma forma que os complexos metálicos correspondentes. Além disso, os elétrons podem entrar em ressonância com a luz incidente dando origem aos plasmons de superfície, que levam à intensificação do campo elétrico local e ao efeito SERS, proporcionando uma ampla variedade de aplicações na química, biologia e nanotecnologia. Ligantes de ponte, multifuncionais, podem ser usados para intermediar a ligação de íons metálicos aos átomos de ouro da superfície. Essa estratégia permite controlar a estabilização em solução através das cargas dos complexos metálicos, acrescentando, ao mesmo tempo, novas características químicas e maior funcionalidade às nanopartículas modificadas. Dessa forma, uma nova química de coordenação pode ser vislumbrada, combinando nanopartículas metálicas, como as de ouro, e complexos, à luz da química supramolecular e dos efeitos de ressonância plasmônica de superfície.In gold nanoparticles the surface metal atoms play a major role, determining their chemical and physical properties by interacting with donor-acceptor species or ligands in a similar way as the related metal complexes. In addition, coherent oscillations of the metal electrons in resonance with the frequency of the exciting light give rise to localized surface plasmons responsible for an enhancement of the local electric field and SERS effect, allowing a wide range of applications in chemistry, biology and nanotechnology. Multifunctional bridging ligands can be employed for simultaneously binding metal ions and surface atoms. The attractive point of this approach is the possibility of exploiting the charge controlled stabilization by the metal complexes, while imparting new characteristics and properties to the modified nanoparticles. As a matter of fact, a new, exciting field of coordination chemistry can be envisaged, combining metal nanoparticles and metal complexes, in the light of supramolecular and surface plasmon resonance effects.

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Coordination compounds built on metal surfaces

Cited by 39 publications

References 153 publications

Antibody Oriented Immobilization on Gold using the Reaction between Carbon Disulfide and Amine Groups and Its Application in Immunosensing

Antibody Oriented Immobilization on Gold using the Reaction between Carbon Disulfide and Amine Groups and Its Application in Immunosensing

Controllable Cobalt Oxide/Au Hierarchically Nanostructured Electrode for Nonenzymatic Glucose Sensing

The coordination chemistry at gold nanoparticles

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