Adsorption of Copper-Amino Acid Complexes on the Surface of Highly Dispersed Silica

Власова, Н. Н.

doi:10.1007/s10595-005-0130-4

Cited by 5 publications

(6 citation statements)

References 11 publications

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“…A more recent example is the ternary Cu 2+ /His/Y zeolite complex observed by Mesu et al (2006). In the same way, Vlasova (2005) rationalized the macroscopic adsorption data of several amino acids (X) on silica in the presence of Cu 2+ through the formation of ternary complexes with formula "Si-O-CuX" with copper making coordinative bonds to both the surface silanolate and the anionic amino acid. Again, macroscopic information could lead to the same model of specific interaction in this instance as spectroscopic information did in the previous one.…”

Section: Simentioning

confidence: 83%

Adsorption and Polymerization of Amino Acids on Mineral Surfaces: A Review

Lambert

2008

Orig Life Evol Biosph

381

376

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The present paper offers a review of recent (post-1980) work on amino acid adsorption and thermal reactivity on oxide and sulfide minerals. This review is performed in the general frame of evaluating Bernal's hypothesis of prebiotic polymerization in the adsorbed state, but written from a surface scientist's point of view. After a general discussion of the thermodynamics of the problem and exactly what effects surfaces should have to make adsorbed-state polymerization a viable scenario, we examine some practical difficulties in experimental design and their bearing on the conclusions that can be drawn from extant works, including the relevance of the various available characterization techniques. We then present the state of the art concerning the mechanisms of the interactions of amino acids with mineral surfaces, including results from prebiotic chemistry-oriented studies, but also from several different fields of application, and discuss the likely consequences for adsorption selectivities. Finally, we briefly summarize the data concerning thermally activated amide bond formation of adsorbed amino acids without activating agents. The reality of the phenomenon is established beyond any doubt, but our understanding of its mechanism and therefore of its prebiotic potential is very fragmentary. The review concludes with a discussion of future work needed to fill the most conspicuous gaps in our knowledge of amino acids/mineral surfaces systems and their reactivity.

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Section: Simentioning

confidence: 83%

Adsorption and Polymerization of Amino Acids on Mineral Surfaces: A Review

Lambert

2008

Orig Life Evol Biosph

381

376

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“…Proton titrations of oxide surfaces in electrolyte solutions, both with and without an organic adsorbate, provide powerful constraints on the possible reactions responsible for adsorption, particularly when used in combination with in situ attenuated total reflection Fourier transform infrared (ATR-FTIR) studies (Holman and Casey 1996;Nordin et al 1997;Boily et al 2000aBoily et al , 2000bBoily et al , 2000cBoily et al , 2005Sheals et al 2002Sheals et al , 2003Lackovic et al 2003;Lindegren et al 2005). However, with few exceptions (Gisler 1981;Whitehead 2003;Vlasova and Golovkova 2004;Vlasova 2005;Jonsson et al 2009). Most adsorption studies of amino acids on oxide surfaces have been limited to systems without control of pH and ionic strength (e.g., Holm et al 1983;Matrajt and Blanot 2004).…”

Section: Mineral Surfacesmentioning

confidence: 99%

Mineral Surfaces, Geochemical Complexities, and the Origins of Life

Hazen

Sverjensky²

2010

Cold Spring Harbor Perspectives in Biology

283

237

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Crystalline surfaces of common rock-forming minerals are likely to have played several important roles in life's geochemical origins. Transition metal sulfides and oxides promote a variety of organic reactions, including nitrogen reduction, hydroformylation, amination, and Fischer-Tropsch-type synthesis. Fine-grained clay minerals and hydroxides facilitate lipid self-organization and condensation polymerization reactions, notably of RNA monomers. Surfaces of common rock-forming oxides, silicates, and carbonates select and concentrate specific amino acids, sugars, and other molecular species, while potentially enhancing their thermal stabilities. Chiral surfaces of these minerals also have been shown to separate left-and right-handed molecules. Thus, mineral surfaces may have contributed centrally to the linked prebiotic problems of containment and organization by promoting the transition from a dilute prebiotic "soup" to highly ordered local domains of key biomolecules.

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“…This is similar to results for many inorganic and organic oxyanions which adsorb as partially or completely deprotonated species at pH values where the aqueous oxyanion is protonated. 2.303RT (8) where the superscripts "*" and "θ" refer to reactions written relative to >FeOH, and to site-occupancy standard states (34), respectively. The terms involving ∆Ψr,1, ∆Ψ r , 2 and ∆Ψ r , 3 in eqs 6, 7, and 8 represent the electrical work involved in the reaction.…”

Section: Spectroscopic Evidence Of Glutamate Surface Speciationmentioning

confidence: 99%

“…However, very little is known about the way amino acids attach to even the simplest mineral surfaces in water. The adsorption behavior as a function of environmental parameters such as pH, ionic strength, type of electrolyte, and surface coverage is poorly known, because few adsorption studies carried out under well-defined conditions exist - . In addition, very few in situ ATR-FTIR spectroscopic studies have been carried out - .…”

Section: Introductionmentioning

confidence: 99%

Glutamate Surface Speciation on Amorphous Titanium Dioxide and Hydrous Ferric Oxide

Sverjensky

Jonsson

et al. 2008

Environ. Sci. Technol.

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Hydrous ferric oxide (HFO) and titanium dioxide exhibit similar strong attachment of many adsorbates including biomolecules. Using surface complexation modeling, we have integrated published adsorption data for glutamate on HFO over a range of pH and surface coverage with published in situ ATR-FTIR studies of glutamate speciation on amorphous titanium dioxide. The results indicate that glutamate adsorbs on HFO as a deprotonated divalent anion at pH 3-5 and 0.2 micromol x m(-2) in the form of chelating-monodentate and bridging-bidentate species attached to the surface through three or four of the carboxylate oxygens, respectively. The amine group may interact weakly with the surface. However, at similar pH values and higher surface coverages, glutamate adsorbs mainly as a monovalent or divalent anion chelated to the surface by the gamma-carboxylate group. In this configuration the alpha-carboxylate and amine groups might be free to interact above the surface with the free ends of adjacent glutamates, suggesting a possible mechanism for chiral self-organization and peptide bond formation.

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Adsorption of Copper-Amino Acid Complexes on the Surface of Highly Dispersed Silica

Cited by 5 publications

References 11 publications

Adsorption and Polymerization of Amino Acids on Mineral Surfaces: A Review

Adsorption and Polymerization of Amino Acids on Mineral Surfaces: A Review

Mineral Surfaces, Geochemical Complexities, and the Origins of Life

Glutamate Surface Speciation on Amorphous Titanium Dioxide and Hydrous Ferric Oxide

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