scholarly journals Intermolecular Hydrogen-Bond Interactions in DPPE and DMPC Phospholipid Membranes Revealed by Far-Infrared Spectroscopy

2021 ◽  
Vol 11 (21) ◽  
pp. 10038
Author(s):  
Valeria Conti Nibali ◽  
Caterina Branca ◽  
Ulderico Wanderlingh ◽  
Giovanna D’Angelo

The vibrational signature in the far-infrared region of two different phospholipids, phosphatidylcholine (PC) and phosphatidylethanolamine (PE), was investigated as a function of relative humidity from 0 to 75% in order to evaluate the effect of headgroup composition on the formation of intermolecular interactions. The substructures of the frequency region between 50 and 300 cm−1 were identified, and changes in the frequency and intensity of the related vibrations with hydration were analyzed. Interestingly, in PE, two additional vibrational bands with respect to PC were found at 162 and 236 cm−1 and assigned to intermolecular hydrogen bonds between the hydrogen-bond-donating groups, -NH3+, and hydrogen-bond-accepting groups, —P—O− and —COO, of adjacent molecules. The presence of these interactions also affected the penetration of water, severely reducing the hydration capability of PE lipids.

1995 ◽  
Vol 8 (2) ◽  
pp. 193-198 ◽  
Author(s):  
K. Antonova ◽  
M. Petrov ◽  
N. Kirov ◽  
T. Tenev ◽  
H. Ratajczak

1991 ◽  
Vol 69 (7) ◽  
pp. 1070-1079 ◽  
Author(s):  
Michel Ringuet ◽  
Denis Girard ◽  
Camille Chapados

A new liposoluble porphyrin, 2,7,12,17-tetrahexyl-3,8,13,18-tetramethylporphin(THTMP), and its complexes with divalent (Mg, Co, Ni, Cu, Zn, Cd, Hg) and trivalent (Mn, Fe) metals have been synthesized. The electronic, infrared, and far-infrared spectra of these compounds were obtained in the same nonpolar, noncoordinating solvent, CCl4. After comparison with the experimental data and the results of normal coordinate analyses from the literature, the assignment of the vibrational bands of THTMP and its complexes is made. Some correlations between the shifts of the metal sensitive bands in the diffferent regions and the structural characteristics of the porphyrin complexes are reported. Some emphasis is made on the magnesium complex in relation to chlorophyll. Key words: Metalloporphyrin, porphyrin, infrared spectroscopy, far-infrared spectroscopy, electronic spectroscopy, nitrogen-metal bond, covalent radius, reduced mass.


2020 ◽  
Vol 124 (12) ◽  
pp. 2427-2435 ◽  
Author(s):  
Marie-Aline Martin-Drumel ◽  
Jessica P. Porterfield ◽  
Manuel Goubet ◽  
Pierre Asselin ◽  
Robert Georges ◽  
...  

1999 ◽  
Vol 194 (2) ◽  
pp. 283-284 ◽  
Author(s):  
Hitoshi Odashima ◽  
Lyndon R. Zink ◽  
K.M. Evenson

2008 ◽  
Vol 51 (5) ◽  
pp. 404-406 ◽  
Author(s):  
G.L. Carr ◽  
R.J. Smith ◽  
L. Mihaly ◽  
H. Zhang ◽  
D.H. Reitze ◽  
...  

1987 ◽  
Vol 12 (11) ◽  
pp. 867 ◽  
Author(s):  
M. Inguscio ◽  
L. R. Zink ◽  
K. M. Evenson ◽  
D. A. Jennings

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