Abstract
The monolayer behaviour of new sheet-like tetrakis(arylethynyl)benzene derivatives bearing two hydrophilic head groups fixed to the para positions of the central benzene nucleus has been investigated at the air–water interface. The surface pressure-area isotherms indicate an edge-on orientation of the flat aromatic molecular part of each tetrayne within the compressed monolayers. Brewster angle microscopy shows spontaneous aggregation already in the expanded state. The surface pressure starts to rise only when the solid condensed islands formed immediately after spreading, make contact. Further information regarding the monolayer organization characteristics of the novel non-classical tetrayne amphiphiles was obtained by surface potential-area isotherms.
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