Axial Ligand Exchange Reactions of meso-Aryl Subporphyrins-Axially Fluoro-Substituted Subporphyrin and a mu-Oxo Dimer and Trimer of Subporphyrins

作者：Shimizu Soji; Matsuda Atsushi; Kobayashi Nagao^*

来源：Inorganic Chemistry, 2009, 48(16): 7885-7890.

DOI：10.1021/ic900880b

High reactivity of the boron atom of meso-aryl subporphyrins enables the introduction of a broad range of functional groups to its axial position. Axially fluoro-substituted subporphyrins were easily synthesized upon treatment of axially hydroxyl-substituted subporphyrins with BF(3)center dot OEt(2). Homogeneous mu-oxo dimers of subporphyrins were formed by heating monomers in the presence of triethylamine under a high vacuum. A heterogeneous subporphyrin-phthalocyanine-subporphyrin trimer was selectively formed from the respective monomers under similar reaction conditions. Structures of these molecules were elucidated by (1)H NMR spectra and a single-crystal X-ray diffraction analysis, and the interactions between neighboring chromophores in the dimeric systems were estimated from absorption and magnetic circular dichroism spectra.

• 出版日期2009-8-17