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Study of Nα-benzoyl-L-argininate ethyl ester chloride, a model compound for pol...
Fonseca, A. C.; Jarmelo, S.; Silva, M. Ramos; Beja, A. M. Matos; Fausto, R.; Gil, M. H.; Simões, P. N.Poly(ester amide)s (PEAs) are lacking in structural and spectroscopic information. This paper reports a structural and spectroscopic characterization of Nα-benzoyl-L-argininate ethyl ester chloride (BAEEH+·Cl−), an important amino acid derivative and an adequate PEAs’ model compound. Crystals of BAEEH+·Cl− obtained by slow evaporation in an ethanol/water mixture were studied by different complementary technique...
1H NMR Spectroscopic and Quantum Chemical Studies on a Poly(ester amide) Model ...
Fonseca, A. C.; Jarmelo, S.; Carvalho, R. A.; Fausto, R.; Gil, M. H.; Simões, P. N.The molecular structure of the l-arginine derivative, Nα-benzoyl-l-argininate ethyl ester chloride (BAEEH+·Cl−), was characterized by combining quantum chemical methods and 1H NMR spectroscopy. A conformational search on the potential energy surfaces of the three lowest-energy tautomers of BAEEH+ [A: R−N+H═(NH2)2; B: R−NH−C(═NH)N+H3; C: R−N+H2−C(═NH)NH2; R = C6H5C(═O)NH−CH(COOCH2CH3)CH2CH2CH2−] was carried out ...
Role of Guanidyl Moiety in the Insertion of Arginine and Nα-Benzoyl-l-argininat...
Fonseca, A. C.; Frías, M. A.; Bouchet, A. M.; Jarmelo, S.; Simões, P. N.; Fausto, R.; Gil, M. H.; Lairion, F.; Disalvo, E. A.Role of Guanidyl Moiety in the Insertion of Arginine and Nα-Benzoyl-l-argininate Ethyl Ester Chloride in Lipid Membranes AbstractFull Text HTMLHi-Res PDF[1247 KB]PDF w/ Links[216 KB]FiguresReferencesA. C. Fonseca‡, M. A. Frías†, A. M. Bouchet†, S. Jarmelo‡§, P. N. Simões‡, R. Fausto§, M. H. Gil‡, F. Lairion† and E. A. Disalvo*† Laboratory of Physical Chemistry of Lipid Membranes, Department of Analytical Che...
Thermal characterization of poly(vinyl chloride) samples prepared by living rad...
Coelho, Jorge F. J.; Simões, P. N.; Mendonça, Patrícia V.; Fonseca, A. C.; Gil, M. H.Poly(vinyl chloride) (PVC) samples were synthesized by a living radical polymerization (LRP) method and compared with commercial PVC prepared by the conventional free radical polymerization (FRP). The differences were assessed, for the first time, in terms of viscosimetry parameters and thermal analysis. The LRP method used to prepare the PVC-LRP samples is the only one available to obtain this polymer free of ...
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