Sun Dayong, Tham Fook S, Reed Christopher A, Boyd Peter D W
Department of Chemistry, University of California, Riverside, CA 92521-0403, USA.
Proc Natl Acad Sci U S A. 2002 Apr 16;99(8):5088-92. doi: 10.1073/pnas.072602399. Epub 2002 Apr 9.
Porphyrins and fullerenes are spontaneously attracted to each other. This supramolecular recognition element can be exploited to produce ordered arrays of interleaved porphyrins and fullerenes. C(60) x H(2)TpyP x Pb(NO(3))(2) x 1.5TCE (H(2)TpyP = tetra-4-pyridylporphyrin; TCE = 1,1,2,2-tetrachloroethane) crystallizes in the tetragonal P4/n space group and the structure has been solved to high resolution. The Pb(2+) ions connect the pyridylporphyrins in infinite sheets with an interlayer spacing of 12.1 A. The fullerenes are intercalated between these layers, acting as pillars. The 6:6 ring juncture bonds of C(60) are centered over the porphyrins, bringing the layers into strict tetragonal register. This arrangement identifies the fullerene-porphyrin interaction as a structure-defining element. The same motif is seen in a related ribbon structure having C(70) intercalated into HgI(2)-linked H(2)TpyTP. The supramolecular design principles involved in assembling these chromophores may have applications in materials science.
卟啉和富勒烯会自发地相互吸引。这种超分子识别元件可用于制备交错排列的卟啉和富勒烯有序阵列。C(60)·H(2)TpyP·Pb(NO(3))(2)·1.5TCE（H(2)TpyP = 四 - 4 - 吡啶基卟啉；TCE = 1,1,2,2 - 四氯乙烷）以四方晶系P4/n空间群结晶，其结构已解析至高分辨率。Pb(2+)离子将吡啶基卟啉连接成无限的片层，层间距为12.1 Å。富勒烯插入这些层之间，起到支柱的作用。C(60)的6:6环连接键位于卟啉上方，使各层严格呈四方对齐。这种排列方式将富勒烯 - 卟啉相互作用确定为一种结构定义元素。在一种相关的带状结构中也观察到了相同的结构基序，其中C(70)插入到HgI(2)连接的H(2)TpyTP中。组装这些发色团所涉及的超分子设计原则可能在材料科学中有应用。
