摘要 |
A calixarene dimer of the general formula (I-G), comprising a first calixarene moiety I and a second calixarene moiety G, wherein: L is [-CH<SUB>2</SUB>-] or [-O-CH<SUB>2</SUB>-O-] and is the same or different between each aryl group; R<SUP>5 </SUP>is H, NO<SUB>2</SUB>, halogen, or C<SUB>1</SUB>-C<SUB>10 </SUB>aliphatic hydrocarbyl group, C<SUB>6</SUB>-C<SUB>20 </SUB>aryl group, C<SUB>6</SUB>-C<SUB>20 </SUB>hydrocarbylaryl group, any of which is optionally substituted by one or more halo or oxo groups or interrupted by one or more oxo or amide groups, and R<SUP>5 </SUP>is the same or different on each aryl group; R<SUP>1 </SUP>comprises a carboxy group which is or is not protonated or protected; two groups out of R<SUP>2</SUP>, R<SUP>3 </SUP>and R<SUP>4 </SUP>are H; the one group out of R<SUP>2</SUP>, R<SUP>3 </SUP>and R<SUP>4 </SUP>not being H comprises at least one atom of one or more of O and S, the said at least one atom being capable of causing the calixarene to be adsorbed onto the surface of the substrate; and the one group out of R<SUP>2</SUP>, R<SUP>3 </SUP>and R<SUP>4 </SUP>not being H being conjugated to the second calixarene moiety G. The calixarene dimers may be incorporated into sensors. Methods of making the calixarene dimers are disclosed. |