Synthesis and guest recognition ability of 2,3-dimethoxy-1,4-phenylene-containing porphyrinoids.
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.
Ikeda
Chusaku
C
Graduate School of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8571, Japan.
Sakamoto
Naoya
N
Nabeshima
Tatsuya
T