Amine-sensing properties of a covalently linked calix[4]arene-porphyrin ("calixporph") multilayered film

作者：Brittle Stuart A^*; Richardson Tim H; Varley Lisa; Hunter Chris A

来源：Journal of Porphyrins and Phthalocyanines, 2010, 14(12): 1027-1033.

DOI：10.1142/S1088424610002859

• porphyrin
• calixarene
• vapour sensor
• amines

Four zinc porphyrin molecules have been linked covalently to a central amphiphilic calix[4] arene molecule to form a zinc "calixporph", ZnCP, which displays enhanced sensitivity to dibutylamine compared to both the discrete zinc porphyrin and two-component mixtures of zinc porphyrin with calixarene. Langmuir-Blodgett films (20 monolayers) of ZnCP display UV-visible spectra which are modified upon exposure to dibutylamine in the concentration range 0.09-0.45 ppt (in N(2)) with a t(50) response time of 8.8 s. The dense packing of the monomeric porphyrin moieties leads to a high absorbance per layer and thus a large sensing signal compared to other LB films capable of amine-detection. This, coupled to the very fast t(50) value, leads to a high figure of merit. This verifies the adopted strategy of using a covalently linked calixporph in order to avoid the potential problems of phase separation associated with two-component mixtures. Furthermore, the ZnCP is selectively responsive to the secondary amine, dibutylamine, compared to the primary and tertiary compounds.

• 出版日期2010-12