Hydrophobic hydration from solubilities of aliphatic hydrocarbons in water

Bhattacharyya, Amitava; Sengupta, Sagar; Bhattacharya, Swapan Kumar

doi:10.1016/j.molliq.2015.01.030

Cited by 1 publication

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“…As shown in Table 1, the D h for FpC n (n = 1−18) ranges from 93 to 270 nm, which is too large to maintain the hydrogen bonding network of water molecules around the interface. 26,39,40 This hydrophobic force apparently is larger than the WCI of CO groups, which explains the precipitation of FpC 1 in water shortly after the aggregation. However, the HE of alkyl chains in FpC n (n = 6−18) is able to compensate the breakage of the water hydrogen bonding network, resulting in assembled colloids in water.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Hydrophobic Effect of Alkyl Groups Stabilizing Self-Assembled Colloids in Water

Murshid

Wang

2017

J. Phys. Chem. B

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Self-assembling behavior of hydrophobic molecules in water confirms that the hydrophobic effect (HE) of alkyl groups stabilizes the aqueous colloids. Fe(CO){CO(CH)CH}(Cp)(PPh) molecules (FpC) with a Fp head and alkyl tail are water-insoluble. FpC aggregates in water precipitated in hours, whereas the hydrophobic interaction (HI) of long alkyl groups drove FpC (n = 6-18) molecules assemble into colloids in water. The alkyl tails interacted and stretched as indicated by IR analysis, while the separation of Fp head groups at the surface of colloids was indicated by the redox behavior of Fe elements. The molecules therefore arranged into a proposed "Y" shape with hydration cavities. The IR and cyclic voltammetry (CV) analyses indicated that the longer the alkyl tail, the larger the hydration cavity and the stronger the HI. Both HI and hydrophobic hydration (HH) were identified as the HE stabilizing the colloids in water. This knowledge is applicable for a broad range of disciplines, including biology, chemistry, and material science.

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Section: ■ Results and Discussionmentioning

confidence: 99%