The effect of myoglobin crowding on the dynamics of water: an infrared study

2014 ◽  
Vol 16 (41) ◽  
pp. 22841-22852 ◽  
Author(s):  
S. Le Caër ◽  
G. Klein ◽  
D. Ortiz ◽  
M. Lima ◽  
S. Devineau ◽  
...  

The vibrational properties (anharmonicity, vibrational relaxation lifetime…) of water in crowded myoglobin solutions remain the same as that in neat water but the collective properties of the water molecules are significantly affected by the protein (orientational time, solid–liquid transition).

2000 ◽  
Vol 26 (3) ◽  
pp. 250-253 ◽  
Author(s):  
G.-P. Ostermeyer ◽  
V. L. Popov

2015 ◽  
Vol 467 ◽  
pp. 660-676 ◽  
Author(s):  
A. Quaini ◽  
C. Guéneau ◽  
S. Gossé ◽  
B. Sundman ◽  
D. Manara ◽  
...  

Author(s):  
Eckart Kneller ◽  
Cheng Du ◽  
Dirk Dümpelmann ◽  
Bernd Fröchte ◽  
Yunus Khan ◽  
...  

2014 ◽  
Vol 70 (12) ◽  
pp. 515-518 ◽  
Author(s):  
Erik Hennings ◽  
Horst Schmidt ◽  
Wolfgang Voigt

The formation of different complexes in aqueous solutions is an important step in understanding the behavior of zinc chloride in water. The structure of concentrated ZnCl2solutions is governed by coordination competition of Cl−and H2O around Zn2+. According to the solid–liquid phase diagram, the title compounds were crystallized below room temperature. The structure of ZnCl2·2.5H2O contains Zn2+both in a tetrahedral coordination with Cl−and in an octahedral environment defined by five water molecules and one Cl−shared with the [ZnCl4]2−unit. Thus, these two different types of Zn2+cations form isolated units with composition [Zn2Cl4(H2O)5] (pentaaqua-μ-chlorido-trichloridodizinc). The trihydrate {hexaaquazinc tetrachloridozinc, [Zn(H2O)6][ZnCl4]}, consists of three different Zn2+cations, one of which is tetrahedrally coordinated by four Cl−anions. The two other Zn2+cations are each located on an inversion centre and are octahedrally surrounded by water molecules. The [ZnCl4] tetrahedra and [Zn(H2O)6] octahedra are arranged in alternating rows parallel to [001]. The structure of the 4.5-hydrate {hexaaquazinc tetrachloridozinc trihydrate, [Zn(H2O)6][ZnCl4]·3H2O}, consists of isolated octahedral [Zn(H2O)6] and tetrahedral [ZnCl4] units, as well as additional lattice water molecules. O—H...O hydrogen bonds between the water molecules as donor and ZnCl4tetrahedra and water molecules as acceptor groups leads to the formation of a three-dimensional network in each of the three structures.


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