Bulk and Adsorbed Monolayer Phase Behavior of Binary Mixtures of Undecanoic Acid and Undecylamine: Catanionic Monolayers

Sun, Chengguo; Bojdys, Michael J.; Clarke, Stuart M.; Harper, Lee D.; Jefferson, Andrew E.; Castro, Miguel; Medina, Santiago

doi:10.1021/la1048198

Cited by 14 publications

(18 citation statements)

References 45 publications

(99 reference statements)

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“…The molecular structure of the complex is similar to that of bitail lipids with two alkyl tails from kC12 and CTAB moieties and the bulky head-group comprising electrostatically bind ionized carbonyl group COO − and the trimethylammonium cation N + (CH 3 ) 3 . Meanwhile, some authors consider this interaction as an extreme form of the hydrogen bonding with proton transfer [26]. However, we have no clear explanation at present for this kind of interaction, and it needs a further investigation.…”

Section: Head Group Vibrations Regionmentioning

confidence: 76%

FTIR and DSC Studies of Binary Mixtures of Long-Chain Aliphatic Compounds: Lauric Acid – Cetyl-trimethylammonium Bromide

et al. 2018

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Structural and thermal properties of a solid-state binary mixture of long-chain cationic and anionic surfactants (so-called catanionic complexes) composed of cetyltrimethylammonium bromide, [H3C-(CH2)15-N + (CH3)3]Br − (CTAB), and saturated fatty acid (FA), CH3(CH2)12COOH (lauric acid, kC12), are studied. To clarify the effect of intermolecular interactions on the crystalline structure and phase transitions in this class of supramolecular compounds, the 1 : 1 kC12-CTAB binary mixture is investigated by means of X-ray diffraction, differential scanning calorimetry (DSC), and temperature-variable Fourier transform infrared spectroscopy (FTIR). Based on the comparison of the obtained results with those of other CTAB-FA binary mixtures with different alkyl chain length mismatches, the possible molecular packing in the crystal phase of CTAB-FA complexes and the mechanism of successive phase transitions in the condensed state are proposed. K e y w o r d s: catanionic complexes, lauric acid, CTAB, DSC, FTIR.

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Section: Head Group Vibrations Regionmentioning

confidence: 76%

FTIR and DSC Studies of Binary Mixtures of Long-Chain Aliphatic Compounds: Lauric Acid – Cetyl-trimethylammonium Bromide

et al. 2018

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“…The apparatus and procedures for the synchrotron X-ray [24,28], Neutron [9,36] and DSC [19,37] have been described elsewhere. The instrument used for the synchrotron experiment was I11 [38] at the Diamond Light Source, Didcot, UK.…”

Section: Methodsmentioning

confidence: 99%

“…In addition alkyl species with functional groups such as alcohols [15][16][17][18][19][20] and fatty acids [21][22][23] are also reported to form similar stable solid monolayers. Recently it has been found that the formation of very stable solid monolayers can be enhanced by a variety of non-covalent interactions within the monolayer, such as hydrogen bonding [24][25][26][27], halogen-halogen bonding [28,29], halogen bonding [28] even at temperatures significantly above the bulk melting point where the bulk adsorbate is liquid.…”

Section: Introductionmentioning

confidence: 99%

The structures of 1-bromoheptane and 1-bromononane monolayers adsorbed on the surface of graphite

Sun¹,

Clarke²,

Brewer³

et al. 2012

Molecular Physics

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X-ray diffraction and differential scanning calorimetry (DSC) have been used to confirm the formation of the solid monolayers of 1-bromoheptane (C7Br) and 1-bromononane (C9Br) on the surface of graphite. The X-ray diffraction patterns of these two species can be fitted by two possible monolayer structures with symmetries Pgb and P2. For one of these (C7Br) this ambiguity can be lifted using neutron diffraction and the Pgb plane group can be identified as the correct structural solution. Both of the unit cells contain two molecules forming an approximately 90 o zig-zag chain of bromine atoms with an inter-bromine distance of approximately 3.70 Å , which is similar to twice the Van der Waals radii of the bromine, suggesting rather little non-covalent interaction. The dipole moments in two adjacent chains are opposed leading to no net dipole for the layer as a whole.

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“…For spectroscopic studies of acid-amine complexes, see: Karlsson et al (2000); Paivarinta et al (2000); Kohler et al (1981); Smith et al (2001Smith et al ( , 2002. For recent diffraction studies of acid-amine complexes, see: Jefferson et al (2011); Sun et al (2011). = 105.641 (2) V = 645.55 (6) Å 3 Z = 2 Mo K radiation = 0.08 mm À1 T = 180 K 0.37 Â 0.25 Â 0.02 mm…”

Section: Related Literaturementioning

confidence: 99%

Benzylammonium hexanoate

Wood

Clarke

2012

Acta Cryst E

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A binary mixture of benzylamine and hexanoic acid has been reacted to form the title salt, C7H10N+·C6H11O2−. This crystal has a 1:1 stoichiometry of acid- and amine-derived species which contrasts with other related species which can have a number of other integer ratios of acid and amine components. The diffraction data indicate complete transfer of a proton from the acid to the amine to give the salt, comprising a cation and anion combination, with the formation of three hydrogen bonds around each ammonium group. This contrasts with other related species

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Bulk and Adsorbed Monolayer Phase Behavior of Binary Mixtures of Undecanoic Acid and Undecylamine: Catanionic Monolayers

Cited by 14 publications

References 45 publications

FTIR and DSC Studies of Binary Mixtures of Long-Chain Aliphatic Compounds: Lauric Acid – Cetyl-trimethylammonium Bromide

FTIR and DSC Studies of Binary Mixtures of Long-Chain Aliphatic Compounds: Lauric Acid – Cetyl-trimethylammonium Bromide

The structures of 1-bromoheptane and 1-bromononane monolayers adsorbed on the surface of graphite

Benzylammonium hexanoate

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