The Added Value of Solid‐State Pb NMR Spectroscopy to Understand the 3D Structures of Pb Amino Acid Complexes

Gasque, Laura; Verhoeven, Michiel A.; Bernès, Syl­vain; Barrios, Fabiola; Haasnoot, Jaap G.; Reedijk, Jan

doi:10.1002/ejic.200800535

Cited by 15 publications

(19 citation statements)

References 32 publications

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“…A stirred (10 min) cloudy white mixture of L-phenylanine (4.99 mmol, 0.825 g) in water (10 mL pH 5.64) was added to a solution of Pb(NO 3 ) 2 (5.00 mmol, 1.657 g) in water (30 mL stirred 10 min, pH 3.73) resulting in a clear, colorless solution with a pH (7) b (Å) 13.6907 (14) 13.5911 (11) 13.4886 (10) 28.522 (3) c (Å) 26.708 (3) 28.742 (2) O, and Pb-HArg all contain a lead center complexed by one or more amino acid ligands, water and nitrate ions, consistent with the structure of Pb-Ile. 4 The asymmetric units of Pb-Val, Pb-ValIle, Pb-Phe 3 2H 2 O, and Pb-HArg are illustrated in Figures 1 to 4. The oxygen enclosed lead environments in each of the compounds and Pb-Ile are illustrated and compared in Figure 5, within three coordination spheres for Pb, listed in Table 2 for Pb-O distances less than 2.6 Å (sphere 1), Pb-O distances between 2.6 Å and 2.9 Å (sphere 2), and Pb-O distances between 2.9 Å and 3.5 Å (sphere 3).…”

Section: ' Experimental Sectionmentioning

confidence: 99%

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Comprehensive Chemical Characterization of Complexes Involving Lead-Amino Acid Interactions

Saunders¹,

Longobardi²,

Burford³

et al. 2011

Inorg. Chem.

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Complexes of lead with L-phenylalanine, L-isoleucine, L-valine, or L-arginine have been isolated from reaction mixtures containing lead nitrate and the respective amino acid in acidic aqueous solution. The compounds have been comprehensively characterized using X-ray crystallography, solid state NMR spectroscopy and solution state NMR spectroscopy, IR and Raman spectroscopies, and electrospray ionization mass-spectrometry. The solid state structures of lead-phenylalanine, lead-valine, and lead-valine-isoleucine complexes show a lead center coordinated by two amino acid ligands, while the lead-arginine complex is a cluster involving two lead centers and three arginine molecules. The structural, spectroscopic, and spectrometric characterization of the complexes provides a basis to establish a fundamental understanding of heavy metal-amino acid interactions.

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Section: ' Experimental Sectionmentioning

confidence: 99%

“…4.02, that was heated at 95-100°C for 60 min, and the colorless solution became very slightly cloudy. The hot solution was slowly cooled to room temperature in the filtration flask, and colorless needle-like When the filtrate evaporated too rapidly a slightly yellow, viscous liquid formed.…”

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confidence: 99%

Comprehensive Chemical Characterization of Complexes Involving Lead-Amino Acid Interactions

Saunders¹,

Longobardi²,

Burford³

et al. 2011

Inorg. Chem.

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“…Noteworthy are the lead nitrate salts of L-valine, L-leucine, and L-isoleucine (the first was reported by Burford et al 2004; the structure of the latter pair was published by Gasque et al 2008). In all three salts, chains were found: In the L-valine and L-isoleucine salts, these chains are topologically identical (and apart from the longer side chain of the amino acid, the species are isostructural; compare unit cell parameters in Table 4.5).…”

Section: Valine Leucine and Isoleucinementioning

confidence: 97%

Compounds of Amino Acids and Neutral Salts

Fleck

Petrosyan

2014

Salts of Amino Acids

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In this chapter we present salts composed of amino acids combined with inorganic cations and anions. These salts generally contain amino acids in neutral, i.e., zwitterionic form, with the charges balanced by the cations and anions. However, some of the phases resented here contain cations, anions, and amino acids, but the amino acids are not in neutral form, as, e.g., glycinate À Cu, but for reasons of similarity, they are included in this chapter. The variation of salts (and thus the number of species) is even greater as for salts of amino acids and cations, as a multitude of combinations of amino acids, cations, and anions is possible. Additionally, different hydration states are often found, as well as different ratios of components. Thus, there are several instances of systems containing more than one phase (e.g., the system glycine-zinc-chloride-water). Despite the greater variation, many coordination patterns found in the salts described in the previous chapter recur in the salts reported here. Likewise, the connectivities of units are similar as those found in salts of amino acids and cations. Instances of materials with noteworthy physical properties are presented. Keywords Introducing RemarksAs stated before, this chapter deals with salts of amino acids and neutral, inorganic salts. In these species, the amino acid usually exists in zwitterionic form, but it is still coordinated to a cation. As other anions are present, the amino acids are not the only possible ligands. These anions can act as additional ligands (plus possible water molecules as well). Moreover, in some cases the inorganic anions are not part of the coordination spheres, but located in the interstices between units composed of cations and coordinating amino acids.M. Fleck and A.M. Petrosyan, Salts of Amino Acids: Crystallization, Structure and Properties,

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“…[122] (ClO 4 ) 4 [100]. In both figures, anions, water molecules and H atoms have been omitted for clarity [124] [125] …”

Section: Figure 45mentioning

confidence: 99%

Advances in Crystallography of Coordination Complexes on Main Group Metals with Amino Acid Ligands

Dong¹,

Zheng²,

Zhou³

et al. 2014

Acta Chim. Sinica

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The study of main-group metal elements and their coordination complexes with amino acids is an important theme in coordination chemistry, but it has often been overshadowed by the intense interest in transition-metal coordination complexes. In recent years, there has been a growing interest in main-group compounds, extending across all members of sand p-blocks in the Period Table, which has resulted in the discovery of numerous new classes of compounds with previously unknown structures and bonding. Among these achievements, the coordination complexes of main group metals with amino acid ligands are especially notable. As a kind of functional ligand, amino acids set up a bridge of interdisciplinary subjects between coordination chemistry and biology. The research on coordination chemistry of main group metals with amino acid ligands will benefit to understanding of the biological effects of main group metals; developing new medicine; designing and synthesizing functional and environmental friendly materials. To achieve these targets, the structural information of these new coordination complexes is very important and it provides fundamental knowledge for more extensive investigation in the future. Therefore, this review focus on the single crystal structures of the coordination complexes of main group metals with amino acid ligands based on X-ray crystallography. Literature coverage is around the last 15 years and ends to May 2013 although some older works are also included for comparing. Specially, this article has been written to commemorate 2014 the International Year of Crystallography declared by United Nations.

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The Added Value of Solid‐State Pb NMR Spectroscopy to Understand the 3D Structures of Pb Amino Acid Complexes

Cited by 15 publications

References 32 publications

Comprehensive Chemical Characterization of Complexes Involving Lead-Amino Acid Interactions

Comprehensive Chemical Characterization of Complexes Involving Lead-Amino Acid Interactions

Compounds of Amino Acids and Neutral Salts

Advances in Crystallography of Coordination Complexes on Main Group Metals with Amino Acid Ligands

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