A supramolecular oscillator composed of carbon nanocluster C120 and a rhodium(III) porphyrin cyclic dimer

被引：56

作者：

Tashiro, K

Hirabayashi, Y

Aida, T

Saigo, K

Fujiwara, K

Komatsu, K

Sakamoto, S

Yamaguchi, K

机构：

[1] Univ Tokyo, Dept Integrated Biosci, Grad Sch Frontier Sci, Kashiwa, Chiba 2778562, Japan

[2] Univ Tokyo, Dept Chem & Biotechnol, Grad Sch Engn, Bunkyo Ku, Tokyo 1138656, Japan

[3] Kyoto Univ, Chem Res Inst, Kyoto 6110011, Japan

[4] Chiba Univ, Ctr Chem Anal, Inage Ku, Chiba 2638522, Japan

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2002年 / 124卷 / 41期

关键词：

D O I：

10.1021/ja0264450

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A rhodium(III) porphyrin cyclic dimer (1) included carbon nanocluster C120 (2) to form a π-electronic supramolecular complex (1⊃2), in which 2 oscillated back and forth within its cavity. Spectroscopic titration of 1 with 2 and line shape analysis on variable-temperature 1H NMR spectral profiles of 1⊃2 and reference inclusion complexes in toluene-d8, chlorobenzene-d5, and dichlorobenzene-d4 indicated that the association constant (Kassoc) of 1⊃2 and oscillation activity of included 2 are both larger as the affinity of the solvent toward fullerenes is smaller. The ΔS‡ values for the oscillation were all positive, indicating that the oscillation of 2 involves desolvation of a protruding C60 moiety of included 2 from the host cavity. Copyright © 2002 American Chemical Society.

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页码：12086 / 12087

页数：2

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