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Di Pino S, Perez Sirkin YA, Morzan UN, Sánchez VM, Hassanali A, Scherlis DA. Water Self-Dissociation is Insensitive to Nanoscale Environments. Angew Chem Int Ed Engl 2023; 62:e202306526. [PMID: 37379226 DOI: 10.1002/anie.202306526] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2023] [Revised: 06/26/2023] [Accepted: 06/27/2023] [Indexed: 06/30/2023]
Abstract
Nanoconfinement effects on water dissociation and reactivity remain controversial, despite their importance to understand the aqueous chemistry at interfaces, pores, or aerosols. The pKw in confined environments has been assessed from experiments and simulations in a few specific cases, leading to dissimilar conclusions. Here, with the use of carefully designed ab initio simulations, we demonstrate that the energetics of bulk water dissociation is conserved intact to unexpectedly small length-scales, down to aggregates of only a dozen molecules or pores of widths below 2 nm. The reason is that most of the free-energy involved in water autoionization comes from breaking the O-H covalent bond, which has a comparable barrier in the bulk liquid, in a small droplet of nanometer size, or in a nanopore in the absence of strong interfacial interactions. Thus, dissociation free-energy profiles in nanoscopic aggregates or in 2D slabs of 1 nm width reproduce the behavior corresponding to the bulk liquid, regardless of whether the corresponding nanophase is delimited by a solid or a gas interface. The present work provides a definite and fundamental description of the mechanism and thermodynamics of water dissociation at different scales with broader implications on reactivity and self-ionization at the air-liquid interface.
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Affiliation(s)
- Solana Di Pino
- Departamento de Química Inorgánica, Analítica y Química Física/INQUIMAE, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Buenos Aires, C1428EHA, Argentina
- Condensed Matter and Statistical Physics, International Centre for Theoretical Physics, I-34151, Trieste, Italy
| | - Yamila A Perez Sirkin
- Departamento de Química Inorgánica, Analítica y Química Física/INQUIMAE, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Buenos Aires, C1428EHA, Argentina
| | - Uriel N Morzan
- Condensed Matter and Statistical Physics, International Centre for Theoretical Physics, I-34151, Trieste, Italy
| | - Verónica M Sánchez
- Departamento de Química Inorgánica, Analítica y Química Física/INQUIMAE, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Buenos Aires, C1428EHA, Argentina
| | - Ali Hassanali
- Condensed Matter and Statistical Physics, International Centre for Theoretical Physics, I-34151, Trieste, Italy
| | - Damian A Scherlis
- Departamento de Química Inorgánica, Analítica y Química Física/INQUIMAE, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Buenos Aires, C1428EHA, Argentina
- Condensed Matter and Statistical Physics, International Centre for Theoretical Physics, I-34151, Trieste, Italy
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Crespi AF, Vega D, Sánchez VM, Rodríguez-Castellón E, Lázaro-Martínez JM. Shared Hydrogen Atom Location and Chemical Composition in Picolinic Acid and Pyridoxal Hydrochloride Derivatives Determined by X-ray Crystallography. J Org Chem 2022; 87:13427-13438. [PMID: 36075104 DOI: 10.1021/acs.joc.2c00724] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Three new single-crystal structures were isolated for picolinic acid (2), the trifluoroacetate salt of picolinic acid (1), and pyridoxal hydrochloride (3). These compounds displayed unconventional crystallographic features that must be considered when structural refinements are carried out. Thus, the generated Fourier differences map obtained with the diffraction data collected at 100 K was crucial to visualize electron densities, which were balanced by either one hydrogen atom or a hydrogen atom with an occupancy factor of 1/2 located between either two carboxylate moieties, two phenolic oxygen atoms, or two pyridinic nitrogen atoms. Moreover, NMR studies were conducted to analyze the bulk chemical composition of single crystals of 2-pyridinecarboxylic acid obtained from the gem-diol/hemiacetal forms and the polymerization products after the treatment of 2-pyridinecarboxaldehyde with TFA:H2O (1) or a diluted Cu(NO3)2 solution (2). The quantitative yield of the pyridoxal hydrochloride crystalline material (3) obtained from a diluted CuCl2 solution was exhaustively characterized by solid-state NMR methods. These methods allowed the resolution of the signals corresponding to the protons of the hydroxyl moiety of the intramolecular hemiacetal group and the phenolic hydrogen. Theoretical calculations using DFT methods were done to complement the atomic location of the hydrogen atoms obtained from the X-ray analysis.
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Affiliation(s)
- Ayelén F Crespi
- Departamento de Ciencias Químicas, Universidad de Buenos Aires, Facultad de Farmacia y Bioquímica, Instituto de Química y Metabolismo del Fármaco (IQUIMEFA-UBA-CONICET), Ciudad Autónoma de Buenos Aires C1113AAD, Argentina
| | - Daniel Vega
- Universidad Nacional de General San Martín, San Martín, Buenos Aires B1650, Argentina.,Departamento de Física de la Materia Condensada, San Martín, Comisión Nacional de Energía Atómica, Buenos Aires 8250, Argentina
| | - Verónica M Sánchez
- Universidad Nacional de General San Martín, San Martín, Buenos Aires B1650, Argentina.,Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales, Instituto de Química Física de los Materiales, Medio Ambiente y Energía (INQUIMAE-UBA-CONICET), Ciudad Autónoma de Buenos Aires C1428EGA, Argentina
| | | | - Juan M Lázaro-Martínez
- Departamento de Ciencias Químicas, Universidad de Buenos Aires, Facultad de Farmacia y Bioquímica, Instituto de Química y Metabolismo del Fármaco (IQUIMEFA-UBA-CONICET), Ciudad Autónoma de Buenos Aires C1113AAD, Argentina
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Crespi AF, Sánchez VM, Vega D, Pérez AL, Brondino CD, Linck YG, Hodgkinson P, Rodríguez-Castellón E, Lázaro-Martínez JM. Paramagnetic solid-state NMR assignment and novel chemical conversion of the aldehyde group to dihydrogen ortho ester and hemiacetal moieties in copper(ii)- and cobalt(ii)-pyridinecarboxaldehyde complexes. RSC Adv 2021; 11:20216-20231. [PMID: 35479880 PMCID: PMC9033980 DOI: 10.1039/d1ra02512k] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2021] [Accepted: 06/01/2021] [Indexed: 12/16/2022] Open
Abstract
The complex chemical functionalization of aldehyde moieties in Cu(ii)- and Co(ii)-pyridinecarboxaldehyde complexes was studied. X-ray studies demonstrated that the aldehyde group (RCHO) of the four pyridine molecules is converted to dihydrogen ortho ester (RC(OCH3)(OH)2) and hemiacetal (RCH(OH)(OCH3)) moieties in both 4-pyridinecarboxaldehyde copper and cobalt complexes. In contrast, the aldehyde group is retained when the 3-pyridinecarboxaldehyde ligand is complexed with cobalt. In the different copper complexes, similar paramagnetic 1H resonance lines were obtained in the solid state; however, the connectivity with the carbon structure and the 1H vicinities were done with 2D 1H–13C HETCOR, 1H–1H SQ/DQ and proton spin diffusion (PSD) experiments. The strong paramagnetic effect exerted by the cobalt center prevented the observation of 13C NMR signals and chemical information could only be obtained from X-ray experiments. 2D PSD experiments in the solid state were useful for the proton assignments in both Cu(ii) complexes. The combination of X-ray crystallography experiments with DFT calculations together with the experimental results obtained from EPR and solid-state NMR allowed the assignment of NMR signals in pyridinecarboxaldehyde ligands coordinated with copper ions. In cases where the crystallographic information was not available, as in the case of the 3-pyridinecarboxaldehyde Cu(ii) complex, the combination of these techniques allowed not only the assignment of NMR signals but also the study of the functionalization of the substituent group. The complex chemical functionalization of the aldehyde group was elucidated in copper and cobalt complexes for 4- and 3-pyridinecarboxaldehyde ligands.![]()
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Affiliation(s)
- Ayelén F Crespi
- Universidad de Buenos Aires - CONICET, Facultad de Farmacia y Bioquímica, Instituto de Química y Metabolismo del Fármaco (IQUIMEFA) Ciudad Autónoma de Buenos Aires Argentina
| | - Verónica M Sánchez
- Centro de Simulación Computacional para Aplicaciones Tecnológicas, CSC-CONICET Ciudad Autónoma de Buenos Aires Argentina.,Universidad Nacional de General San Martín San Martín Buenos Aires Argentina
| | - Daniel Vega
- Universidad Nacional de General San Martín San Martín Buenos Aires Argentina.,Comisión Nacional de Energía Atómica San Martín Buenos Aires Argentina
| | - Ana L Pérez
- Facultad de Bioquímica y Ciencias Biológicas, Universidad Nacional del Litoral - CONICET, Ciudad Universitaria Santa Fe Argentina
| | - Carlos D Brondino
- Facultad de Bioquímica y Ciencias Biológicas, Universidad Nacional del Litoral - CONICET, Ciudad Universitaria Santa Fe Argentina
| | | | | | | | - Juan M Lázaro-Martínez
- Universidad de Buenos Aires - CONICET, Facultad de Farmacia y Bioquímica, Instituto de Química y Metabolismo del Fármaco (IQUIMEFA) Ciudad Autónoma de Buenos Aires Argentina
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Mena-Sánchez G, Babio N, Martínez-González MÁ, Corella D, Schröder H, Vioque J, Romaguera D, Martínez JA, Lopez-Miranda J, Estruch R, Wärnberg J, Bueno-Cavanillas A, Serra-Majem L, Tur JA, Arós F, Tinahones FJ, Sánchez VM, Lapetra J, Pintó X, Vidal J, Vázquez C, Ordovás JM, Delgado-Rodriguez M, Matía-Martín P, Basora J, Buil-Cosiales P, Fernandez-Carrion R, Fitó M, Salas-Salvadó J. Fermented dairy products, diet quality, and cardio-metabolic profile of a Mediterranean cohort at high cardiovascular risk. Nutr Metab Cardiovasc Dis 2018; 28:1002-1011. [PMID: 30207268 DOI: 10.1016/j.numecd.2018.05.006] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/02/2018] [Revised: 05/10/2018] [Accepted: 05/11/2018] [Indexed: 11/23/2022]
Abstract
BACKGROUND AND AIMS Fermented dairy products have been associated with a better diet quality and cardio-metabolic profile. However, in Mediterranean populations, these associations have not been well characterized. The aim of this study was to assess the diet quality and the associations between the consumption of total fermented dairy products and their subtypes and the prevalence of Metabolic Syndrome (MetS) components in a Mediterranean population at high cardiovascular risk. METHODS AND RESULTS Baseline cross-sectional analyses were conducted on 6,572 men and women (mean age: 65 years) with overweight or obesity and MetS recruited into the PREDIMED-Plus cohort. A 143-item Food Frequency Questionnaire (FFQ) was used, and anthropometrical, biochemical, and blood pressure measurements were recorded. Multivariate-adjusted Cox regressions were fitted to analyze the association between quartiles of consumption of fermented dairy products and their subtypes and MetS components to estimate the relative risk (RR) and 95% confidence intervals (95% CIs). Participants who were high consumers of fermented dairy products reported a higher consumption of fruit, vegetables, fish, nuts, and whole bread and a lower consumption of white bread, alcohol, and cookies. Participants in the higher quartile showed a lower prevalence of the low HDL-cholesterol component of the MetS (RR=0.88; 95% CI: 0.78-0.98) than those in the lowest quartile of cheese consumption. Cheese consumption was inversely associated with the prevalence of hypertriglyceridemia. Total fermented dairy products, yogurt, and its types were not associated with any of the MetS components. CONCLUSIONS Compared to nonconsumers, participants consuming fermented dairy products reported a better diet quality and, particularly, cheese consumers presented a lower prevalence of hypertriglyceridemia and low HDL-cholesterol plasma levels, which are MetS components.
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Affiliation(s)
- G Mena-Sánchez
- Human Nutrition Unit, University Hospital of Sant Joan de Reus, Department of Biochemistry and Biotechnology, Pere Virgili Institute for Health Research, Rovira i Virgili University, Reus, Spain; CIBER de Fisiopatología de la Obesidad y la Nutrición (CIBEROBN), Instituto de Salud Carlos III, Madrid, Spain
| | - N Babio
- Human Nutrition Unit, University Hospital of Sant Joan de Reus, Department of Biochemistry and Biotechnology, Pere Virgili Institute for Health Research, Rovira i Virgili University, Reus, Spain; CIBER de Fisiopatología de la Obesidad y la Nutrición (CIBEROBN), Instituto de Salud Carlos III, Madrid, Spain.
| | - M Á Martínez-González
- CIBER de Fisiopatología de la Obesidad y la Nutrición (CIBEROBN), Instituto de Salud Carlos III, Madrid, Spain; Department of Preventive Medicine and Public Health, University of Navarra-Navarra Institute for Health Research, Pamplona, Spain; Harvard TH Chan School of Public Health, Department of Nutrition, Boston, USA
| | - D Corella
- CIBER de Fisiopatología de la Obesidad y la Nutrición (CIBEROBN), Instituto de Salud Carlos III, Madrid, Spain; Department of Preventive Medicine, University of Valencia, Valencia, Spain
| | - H Schröder
- Cardiovascular Risk and Nutrition Research Group (CARIN), Hospital del Mar Research Institute (IMIM), Barcelona, Spain; CIBER de Epidemiología y Salud Pública (CIBERESP), Instituto de Salud Carlos III, Madrid, Spain
| | - J Vioque
- CIBER de Epidemiología y Salud Pública (CIBERESP), Instituto de Salud Carlos III, Madrid, Spain; Nutritional Epidemiology Research Group, University of Miguel Hernández, Alicante, Spain
| | - D Romaguera
- CIBER de Fisiopatología de la Obesidad y la Nutrición (CIBEROBN), Instituto de Salud Carlos III, Madrid, Spain; Instituto de Investigación Sanitaria Illes Balears (IdISBa), University Hospital Son Espases, Palma de Mallorca, Spain
| | - J A Martínez
- CIBER de Fisiopatología de la Obesidad y la Nutrición (CIBEROBN), Instituto de Salud Carlos III, Madrid, Spain; Department of Nutrition, Food Sciences, and Physiology, Center for Nutrition Research, University of Navarra, Pamplona, Spain; Madrid Institute for Advanced Studies (IMDEA) Food Institute, Madrid, Spain
| | - J Lopez-Miranda
- CIBER de Fisiopatología de la Obesidad y la Nutrición (CIBEROBN), Instituto de Salud Carlos III, Madrid, Spain; Lipids and Atherosclerosis Unit, Department of Internal Medicine, Reina Sofia University Hospital, IMIBIC, University of Córdoba, Córdoba, Spain
| | - R Estruch
- CIBER de Fisiopatología de la Obesidad y la Nutrición (CIBEROBN), Instituto de Salud Carlos III, Madrid, Spain; Department of Internal Medicine, Hospital Clínic, IDIBAPS August Pi i Sunyer Biomedical Research Institute, University of Barcelona, Barcelona, Spain
| | - J Wärnberg
- CIBER de Fisiopatología de la Obesidad y la Nutrición (CIBEROBN), Instituto de Salud Carlos III, Madrid, Spain; Department of Nursing, University of Malaga, Institute of Biomedical Research in Malaga (IBIMA), Malaga, Spain
| | - A Bueno-Cavanillas
- Nutritional Epidemiology Research Group, University of Miguel Hernández, Alicante, Spain; Departament of Preventive Medicine and Public Health, University of Granada, Spain
| | - L Serra-Majem
- CIBER de Fisiopatología de la Obesidad y la Nutrición (CIBEROBN), Instituto de Salud Carlos III, Madrid, Spain; Research Institute of Biomedical and Health Sciences, University of Las Palmas de Gran Canaria, Las Palmas de Gran Canaria, Spain
| | - J A Tur
- CIBER de Fisiopatología de la Obesidad y la Nutrición (CIBEROBN), Instituto de Salud Carlos III, Madrid, Spain; Research Group on Community Nutrition and Oxidative Stress, University of the Balearic Islands, Palma de Mallorca, Spain
| | - F Arós
- CIBER de Fisiopatología de la Obesidad y la Nutrición (CIBEROBN), Instituto de Salud Carlos III, Madrid, Spain; Department of Cardiology, University Hospital Araba, Vitoria, Spain
| | - F J Tinahones
- CIBER de Fisiopatología de la Obesidad y la Nutrición (CIBEROBN), Instituto de Salud Carlos III, Madrid, Spain; Department of Endocrinology and Nutrition, Virgen de la Victoria Hospital, Malaga University, Malaga, Spain
| | - V M Sánchez
- Nutritional Epidemiology Research Group, University of Miguel Hernández, Alicante, Spain; Institute of Biomedicine (IBIOMED), University of León, Spain
| | - J Lapetra
- CIBER de Fisiopatología de la Obesidad y la Nutrición (CIBEROBN), Instituto de Salud Carlos III, Madrid, Spain; Department of Family Medicine, Unit Research, Distrito Sanitario Atención Primaria Sevilla, Sevilla, Spain
| | - X Pintó
- CIBER de Fisiopatología de la Obesidad y la Nutrición (CIBEROBN), Instituto de Salud Carlos III, Madrid, Spain; Lipid Unit, Department of Internal Medicine, Bellvitge Biomedical Research Institute (IDIBELL)-Hospital Universitari de Bellvitge, L'Hospitalet de Llobregat, Barcelona, Spain
| | - J Vidal
- Department of Lipids, Hospital Clínic, Institut d'Investigacions Biomediques August Pi Sunyer (IDIBAPS), University of Barcelona, Barcelona, Spain
| | - C Vázquez
- CIBER de Fisiopatología de la Obesidad y la Nutrición (CIBEROBN), Instituto de Salud Carlos III, Madrid, Spain; Department of Endocrinology and Nutrition, University Hospital Fundación Jiménez Díaz, Madrid, Spain
| | - J M Ordovás
- Madrid Institute for Advanced Studies (IMDEA) Food Institute, Madrid, Spain; Jean Mayer USDA Human Nutrition Research Center on Aging (JM-USDA-HNRCA), Tufts University, Boston, USA
| | - M Delgado-Rodriguez
- Instituto de Investigación Sanitaria Illes Balears (IdISBa), University Hospital Son Espases, Palma de Mallorca, Spain; Department of Health Sciences, University of Jaen, Jaen, Spain
| | - P Matía-Martín
- Endocrinology and Nutrition Department, Hospital Clínico San Carlos-IdISSC, Madrid, Spain
| | - J Basora
- CIBER de Fisiopatología de la Obesidad y la Nutrición (CIBEROBN), Instituto de Salud Carlos III, Madrid, Spain; Primary Health Care Area, Reus, Tarragona, Spain; Institut Català de la Salut, Generalitat de Catalunya, Barcelona, Spain
| | - P Buil-Cosiales
- CIBER de Fisiopatología de la Obesidad y la Nutrición (CIBEROBN), Instituto de Salud Carlos III, Madrid, Spain; Primary Health Care, Servicio Navarro de Salud-Osasunbidea, Pamplona, Navarra, Spain; Navarra Institute for Health Research (IdiSNA), Pamplona, Navarra, Spain
| | - R Fernandez-Carrion
- CIBER de Fisiopatología de la Obesidad y la Nutrición (CIBEROBN), Instituto de Salud Carlos III, Madrid, Spain; Harvard TH Chan School of Public Health, Department of Nutrition, Boston, USA
| | - M Fitó
- CIBER de Fisiopatología de la Obesidad y la Nutrición (CIBEROBN), Instituto de Salud Carlos III, Madrid, Spain; Cardiovascular Risk and Nutrition Research Group (CARIN), Hospital del Mar Research Institute (IMIM), Barcelona, Spain
| | - J Salas-Salvadó
- Human Nutrition Unit, University Hospital of Sant Joan de Reus, Department of Biochemistry and Biotechnology, Pere Virgili Institute for Health Research, Rovira i Virgili University, Reus, Spain; CIBER de Fisiopatología de la Obesidad y la Nutrición (CIBEROBN), Instituto de Salud Carlos III, Madrid, Spain.
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