Amine-sensing properties of a covalently linked calix[4]arene-porphyrin ("calixporph") multilayered film
Amine-sensing properties of a covalently linked calix[4]arene-porphyrin ("calixporph") multilayered film
复制标题
DOI：
10.1142/s1088424610002859
复制
发表时间：
2010-12-01
影响因子：
1.5
通讯作者：
Hunter, Chris A.
中科院分区：
文献类型：
--
作者：
Brittle, Stuart A.;Richardson, Tim H.;Hunter, Chris A.
四个卟啉锌分子与中心两亲性杯芳烃分子共价连接，形成“杯芳烃”锌，ZnCP，与分离的锌卟啉和杯芳烃的双组分锌卟啉混合物相比，对二丁胺的敏感性增强。ZnCP Langmuir-Blodgett膜（20层）在浓度为0.09 ~ 0.45 ppt （N(2)）的二丁胺作用下显示出紫外可见光谱，t（50）响应时间为8.8 s。与其他能够检测胺的LB膜相比，单体卟啉部分的致密包装导致每层的高吸光度，因此具有大的传感信号。这与非常快的t（50）值相结合，导致了很高的价值数字。这证实了采用共价连接杯状卟啉的策略，以避免与双组分混合物相关的相分离的潜在问题。此外，与伯胺和叔胺化合物相比，ZnCP对仲胺二丁胺有选择性反应。
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.