The crystal structure of copper glutamate dihydrate.
10 Oct 1966-Acta Crystallographica (International Union of Crystallography)-Vol. 21, Iss: 4, pp 594-600
About: This article is published in Acta Crystallographica.The article was published on 1966-10-10. It has received 65 citations till now. The article focuses on the topics: Copper.
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TL;DR: In this article, a review of bio-MOFs is presented, highlighting the structural impact of these ligands on the structure, and their contribution to the MOF properties and applications.
101 citations
TL;DR: This work demonstrates with an intriguing example, that the self-assembly ability of supramolecular nanofibers could be finely tuned with the ligands' chirality, and offers opportunities for obtaining one-dimensional hierarchical nanostructures and expands the investigation scope of stereoselective self- assembly.
Abstract: Miniaturization of metalbiomolecule frameworks (MBioFs) to the nanometer scale represents a novel strategy for fabricating materials with tunable physical and chemical properties. Herein, we demonstrate a simple, low-cost, and completely organic solvent-free strategy for constructing a dl-glutamic acidcopper ion-based three-dimensional nanofibrous network structure. The building blocks used are available in large quantities and do not require any laborious synthesis or modification. Importantly, we demonstrate with an intriguing example, that the self-assembly ability of supramolecular nanofibers could be finely tuned with the ligands chirality. This offers opportunities for obtaining one-dimensional hierarchical nanostructures and expands the investigation scope of stereoselective self-assembly. Furthermore, the material displays good ability in removing anionic dyes from water and inhibits the growth of both Gram positive and Gram negative bacteria, possibly through the contact-killing mechanism; this indicates potential applications in environmental issues and antimicrobial nanotherapeutics.
86 citations
TL;DR: In this paper, the composition and mode of attachment of Cu(II) complexes at the gamma-Al(2)O(3)-water interface in suspensions containing a simple amino acid (glutamate) were characterized with EXAFS and FTIR spectroscopies.
80 citations
TL;DR: Some geometrical parameters associated with the donor and the acceptor end of O-H…O hydrogen bonds have been analysed and the main results are arrived at.
Abstract: Some geometrical parameters associated with the donor and the acceptor end of O-H…O hydrogen bonds have been analysed. The data consist of 356 hydrogen bonds from reported crystal structures of amino acids, peptides and oligosaccharides. The following conclusions are arrived at:
(a) The most probable range for the hydrogen bond length is between 2.7–2.8 a, the average being 2.76 a. When the donor is a water molecule the distribution is slightly different from the other cases. The average becomes 2.82 a, indicating that O-H…O hydrogen bonds, where a water molecule acts as a donor, tend to be slightly larger.
(b) The maximum in the distribution for the hydrogen bond angle (H-O‥ .O) lies in the range 5°–10°, indicating that the O-H…O hydrogen bonds tend to be slightly nonlinear, a feature similar to that for N-H…O hydrogen bonds.
(c) For carbonyl type of acceptor groups, the distribution of angle between O‥ .O (or H…O) and C = O extended shows a maximum in the range 50°–60° indicating a directional property towards the lone pair electrons.
In order to study the effect of lone pair orbitals on the direction of orientation of the O-H group the following parameters connected with the direction of lone pair orbitals are analysed and the main results are:
(d) The elevation of O‥ .O (and H…O) direction from the acceptor plane (plane containing the lone pair orbitals), (ζ), shows a maximum in the range O°–10° indicating that the direction thus tends to lie close to the acceptor plane. For carbonyl acceptor groups, the distribution is uniform up to 30° and many of the larger values of ζ are found to occur for carbonyl acceptor groups only.
(e) The distribution for the angle between the projection Oaccep.…Odonor (and Oaccep.…H) direction on the acceptor plane and the direction of the lone pair orbital (ζ) shows a maximum in the range O°–30°. The distribution is found to be dependent on the number of hydrogen bonds for which the same oxygen atom is the acceptor. The distribution for ζ shows a maximum between 20°–30° for those cases when the oxygen atom is recipient of only one hydrogen bond and the maximum occurs between O°–10° for those cases when the oxygen receives two hydrogen bonds.
(f) The geometry in the limited number of examples where the oxygen is the recipient of three hydrogen bonds is also discussed.
80 citations
TL;DR: In this paper, the authors summarized the data for over nine hundred dimeric Cu(II) coordination compounds and found that the most common ligands are O− and N− donors.
Abstract: This review summarizes the data for over nine hundred dimeric Cu(II) coordination compounds. There are several types of the bridges, from which doubly bridges by far prevail. The most common ligands are O− and N− donors. From the stereochemical point of view, a square-pyramidal arrangement with different degrees of distortion about Cu(II), is the most common. Several relationships were found between the Cu-Cu distances and the Cu-L-Cu bridge angle and the type of bridging, between the intra-ligand L-Cu-L ring angles and coordination numbers.
67 citations
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