Interaction of p-nitrophenol with lipids at hidrophobic interfaces

Kozarac, Zlatica; Ćosović, Božena; Gašparović, Blaženka; Dhathathreyan, A.; Mobius, Dietmar (1991) Interaction of p-nitrophenol with lipids at hidrophobic interfaces. Langmuir, 7 (6). pp. 1076-1081. ISSN 0743-7463

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Abstract

Adsorption of p-nitrophenol (PNP) at two model hydrophobic interfaces, namely at air/solution interface and mercury electrode/solution interface, as well as its interaction with neutral and charged lipids has been studied in monolayers by light reflection spectroscopy and electrochemical methods. Investigations have been performed at pH=10 and pH=11 wher the dissociated form of PNP carrying a negative charge is predominant. In this pH region no accumulation of PNP from bulk solution to the free air/solution interface and slight adsorption at mercury surface was observed. PNP also does not accumulate in neutral phospholipid monolayers spread at the air/solution interface while phospholipid layers formed at mercury by adsorption from the bulk solution cause the inhibition of electrochemical reduction of PNP. The attachment of PNP to the neutral phospholipid layer is enhanced and accelerated at both interfaces by the presence of quarternary ammonium salts in the solution.

Item Type:	Article
Uncontrolled Keywords:	p-nitrophenol; lipids; interaction; hydrophobic effect; monolayers; voltammetry
Subjects:	NATURAL SCIENCES > Chemistry
Divisions:	Division for Marine and Enviromental Research
Projects:	Project title Project leader Project code Project type Priroda i reaktivnost organskih tvari u moru i kopnenim voda Božena Ćosović 00981503 MZOS
Depositing User:	Blaženka Gašparović
Date Deposited:	06 Jul 2016 11:56
URI:	http://fulir.irb.hr/id/eprint/2889
DOI:	10.1021/la00054a009

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