Oxidized Aromatic–Aliphatic Mixed Films at the Air–Aqueous Solution Interface

Griffith, Elizabeth C.; Cuya, Teobaldo; Pimentel, André Silva; Tyndall, Geoffrey S.; Vaida, Veronica

doi:10.1021/jp402737n

Cited by 24 publications

(17 citation statements)

References 71 publications

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“…16 In addition, the surface pressure of second-order phase transitions from TC to UC phase upon compression occur at about 24 mN/m, which is consistent with previous studies. 25,[41][42] Finally, compressing the monolayer even further leads to a collapse state where the monolayer forms threedimensional structures because the surface is no longer stable. 16,[43][44] The π−A isotherms of fatty acids obtained on ASW subphase are presented in Figure 1(b).…”

Section: Methodsmentioning

confidence: 99%

Insights into the Headgroup and Chain Length Dependence of Surface Characteristics of Organic-Coated Sea Spray Aerosols

Cheng

Tsona

et al. 2019

ACS Earth Space Chem.

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The structure of sea spray aerosols (SSAs) has been described as a saline core coated by organic surfactants. The presence of surface-active compounds at the air-water interface can have a large impact on physical, chemical and optical properties of SSAs. The surfactant molecules chosen for this study, palmitic acid (PA), stearic acid (SA), arachidic acid (AA), methyl palmitate (MP), methyl stearate (MS) and methyl arachidate (MA), were used to investigate the effect of alkyl chain-length, head-groups and sea salts on the surface properties of these monolayers. A Langmuir trough was used for measuring surface pressure−area (π−A) isotherms to reveal macroscopic phase behavior of the surface films at the air-water interface. Infrared reflection absorption spectroscopy (IRRAS) was employed to have a molecular-level understanding of the interfacial molecular organization. The π−A isotherms indicated that sea salts, present in the subphase, exert a strong condensing effect on fatty acid monolayers, while exerting expanding effect on fatty acid methyl ester monolayers, which was confirmed by results from IRRAS experiments. IRRAS further revealed that the alkyl chains were in an all-trans conformation, which can be evidenced by the relatively low νa(CH2) and νs(CH2) stretching frequencies. The conformational order changes in the alkyl chains of different film-forming species (C16 < C18 < C20) were directly revealed by analyzing the relative intensity of the νa(CH2) and νs(CH2) peaks in the C-H stretching region. Thus, all the three factors alter the phase behavior and molecular packing of the monolayers at the air-aqueous interface.

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Section: Methodsmentioning

confidence: 99%

Insights into the Headgroup and Chain Length Dependence of Surface Characteristics of Organic-Coated Sea Spray Aerosols

Cheng

Tsona

et al. 2019

ACS Earth Space Chem.

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“…[35][36][37][38][39][40][41][42] The atomistic MD simulations are also feasible to be investigate these systems on time scales of the order of 200-400 ns. [43][44][45][46][47][48][49][50][51][52] On the other hand, to the best of our knowledge, the adsorption of drugs on lung surfactant models has not been investigated at all.…”

Section: Introductionmentioning

confidence: 99%

Prednisolone adsorption on lung surfactant models: insights on the formation of nanoaggregates, monolayer collapse and prednisolone spreading

et al. 2017

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“…Consequently, this system presents a complex behavior. 77 Fig. The formation of aggregates is also observed in water and lipid phases.…”

Section: Resultsmentioning

confidence: 88%

Molecular dynamics of dibenz[a,h]anthracene and its metabolite interacting with lung surfactant phospholipid bilayers

Padilla-Chavarría

Cuya

Pimentel

2015

Phys. Chem. Chem. Phys.

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The interaction of dibenz[a,h]anthracene and its ultimate carcinogenic 3,4-diol-1,2-epoxide with lung surfactant phospholipid bilayers was successfully performed using molecular dynamics. The DPPC/DPPG/cholesterol bilayer (64 : 64 : 2) was used as the lung surfactant phospholipid bilayer model and compared with the DPPC bilayer as a reference. Dibenz[a,h]anthracene and its 3,4-diol-1,2-epoxide were inserted in water and lipid phases in order to investigate their interactions with the lung surfactant phospholipid bilayers. The radial distribution function between two P atoms in polar heads shows that the 3,4-diol-1,2-epoxide affects the order between the P atoms in the DPPC/DPPG/cholesterol model more than dibenz[a,h]anthracene, which is a consequence of its preference for the polar heads and dibenz[a,h]anthracene prefers to be located in the hydrocarbon chain of the phospholipid bilayers. Dibenz[a,h]anthracene and its 3,4-diol-1,2-epoxide may form aggregates in water and lipid phases, and in the water-lipid interface. The implications for the possible effect of dibenz[a,h]anthracene and its 3,4-diol-1,2-epoxide in the lung surfactant phospholipid bilayers are discussed.

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Oxidized Aromatic–Aliphatic Mixed Films at the Air–Aqueous Solution Interface

Cited by 24 publications

References 71 publications

Insights into the Headgroup and Chain Length Dependence of Surface Characteristics of Organic-Coated Sea Spray Aerosols

Insights into the Headgroup and Chain Length Dependence of Surface Characteristics of Organic-Coated Sea Spray Aerosols

Prednisolone adsorption on lung surfactant models: insights on the formation of nanoaggregates, monolayer collapse and prednisolone spreading

Molecular dynamics of dibenz[a,h]anthracene and its metabolite interacting with lung surfactant phospholipid bilayers

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