Adsorption of alpha amino acids at the water/goethite interface

Soil Chemical Insights Provided through Vibrational Spectroscopy

“…Substantial progress has been made in understanding bacterial adhesion processes through the use of model compounds. For example, elucidation of carboxylate binding mechanisms has been facilitated through FTIR experiments examining amino acids (Norén et al, 2008;Parikh et al, 2011;Roddick-Lanzilotta et al, 1998;Roddick-Lanzilotta and McQuillan, 2000) and model carboxylic acids (Boily et al, 2000;Deacon and Phillips, 1980;Ha et al, 2008;Norén and Persson, 2007). In fact, studies by Alcock and coauthors (1976) and later refined by others (Chu et al, 2004;Deacon and Phillips, 1980;Dobson and McQuillan, 1999), demonstrate that carboxyl binding mechanisms can be inferred through the separation differences (Δν) between the asymmetric carboxylate [ν as (COO − Following the spectral interpretations for model carboxylate compounds, there is evidence for carboxyl involvement during adhesion of P. putida to hematite (α-Fe 2 O 3 ) under flow conditions, possibly forming bidentate bridging complexes to the mineral surface [ν s (COO − ) shift from 1400 to 1415 cm −1 ; Δν ≈ 150 cm −1 ], with additional binding interactions through polysaccharides and phosphoryl groups (Ojeda et al, 2008).…”

Hydration–dehydration interactions between glycine and anhydrous salts: Implications for a chemical evolution of life

“…Liquid water would interfere with the interactions. However, amino acids have been frequently reported to adsorb on minerals tightly from aqueous solutions in various amino acids-minerals combinations (e.g., Roddick-Lanzilotta and McQuillan, 2000;Noren et al, 2008;Sverjensky et al, 2008). In such conditions, direct transfer of H 2 O molecules dehydrated from amino acids to minerals may occur at the mineral surfaces.…”

ATR-FTIR spectroscopic study of the adsorption of desferrioxamine B and aerobactin to the surface of lepidocrocite (γ-FeOOH)

“…Assuming, that the hexadentate structure of Fe(III)-aerobactin is preserved at the surface, the only free functional groups to interact with the surface are the lateral carboxylic groups. Based on the findings of a spectroscopic investigation on the adsorption of a-amino acids to goethite (Noren et al, 2008), the amine moiety adjacent to the lateral carboxylate group may also interact with the surface by forming a five-membered chelate ring with the lateral carboxylate group. The high affinity of Fe(III)-aerobactin complexes for the surface of lepidocrocite as observed in batch adsorption experiments (Borer et al, 2009) is likely explained in terms of strong specific interactions by the lateral carboxylate and the adjacent amine group.…”