title: Synthesis and guest recognition ability of 2,3-dimethoxy-1,4-phenylene-containing porphyrinoids.
abstract: The acid-catalyzed condensation of the bispyrrolylbenzene derivative and benzaldehyde yielded macrocycles 1 and 2 bearing three and four dipyrrin units which are connected by 2,3-dimethoxy-1,4-phenylene rings. The cationic guest recognition ability of 1 was investigated by UV-vis absorption, (1)H NMR spectroscopic techniques, and ab initio calculations (HF/3-21G(*)). The tris-dipyrrin macrocycle 1 was found to recognize alkali metals in the O6 binding cavity.
authors.affiliation: Graduate School of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8571, Japan.
authors.forename: Chusaku
authors.initials: C
authors.lastname: Ikeda
authors.forename: Naoya
authors.initials: N
authors.lastname: Sakamoto
authors.forename: Tatsuya
authors.initials: T
authors.lastname: Nabeshima