Institut de Chimie, UMR 7177 CNRS-UDS, 1 Rue Blaise Pascal, 67008 Strasbourg, France.
Inorg Chem. 2011 Jul 4;50(13):6073-82. doi: 10.1021/ic2001255. Epub 2011 Jun 7.
An efficient noncovalent assembly process involving high geometrical control was applied to a linear bis(imidazolyl zinc porphyrin) 7Zn, bearing C(18) substitutents, to generate linear multiporphyrin wires. The association process is based on imidazole recognition within the cavity of the phenanthroline-strapped zinc porphyrin. In chlorinated solvents, discrete soluble oligomers were obtained after (7Zn)(n) was end-capped with a terminal single imidazolyl zinc porphyrin derivative 4Zn. These soluble species, as well as their destabilization in the presence of protic solvents, were studied by UV-visible and time-resolved luminescence. In the solid state, assemblies as long as 480 nm, which corresponds to 190 iterative units or a total of 380 porphyrins, were observed by atomic force microscopy measurements on mica. The length and linearity of the porphyrin wires obtained illustrate the potential of phenanthroline-strapped porphyrins for the directional control of self-assembly processes.
采用涉及高几何控制的有效非共价组装工艺，将具有 C(18)取代基的线性双(咪唑基锌卟啉)7Zn 应用于生成线性多卟啉线。该缔合过程基于在被菲咯啉束缚的锌卟啉腔体内的咪唑识别。在氯化溶剂中，在用末端单咪唑基锌卟啉衍生物 4Zn 封端后，(7Zn)(n) 得到离散的可溶性齐聚物。通过紫外-可见和时间分辨荧光研究了这些可溶性物质以及它们在质子溶剂存在下的不稳定性。在固态中，通过云母上的原子力显微镜测量观察到长达 480nm 的组装体，这对应于 190 个迭代单元或总共 380 个卟啉。所获得的卟啉线的长度和线性说明了菲咯啉束缚卟啉在定向控制自组装过程中的潜力。
