Rate constant measurements for radical addition reactions with C60 by means of time-resolved EPR and spin-echo detected pulsed EPR spectroscopy

被引：4

作者：

Takahashi, Hirona ^{[1
]}

Hirano, Hiroki ^{[2
]}

Nomura, Kyohei ^{[2
]}

Hagiwara, Kenta ^{[3
]}

Kawai, Akio ^{[2
]}

机构：

[1] Okayama Univ Sci, Fac Sci, Dept Chem, Kita Ku, 1-1 Ridaicho, Okayama 7000005, Japan

[2] Kanagawa Univ, Fac Sci, Dept Chem, 2946 Tsuchiya, Hiratsuka, Kanagawa 2591293, Japan

[3] Tokyo Inst Technol, Grad Sch Sci & Engn, Dept Chem, Meguro Ku, 2-12-1 Ohokayarna, Tokyo 2121, Japan

来源：

CHEMICAL PHYSICS LETTERS | 2021年 / 763卷

关键词：

CARBON-CENTERED RADICALS; LASER FLASH-PHOTOLYSIS; ELECTRON-PARAMAGNETIC-RESONANCE; ABSOLUTE HARDNESS; DOUBLE-BONDS; POLYMERIZATION; PHOTOINITIATORS; POLARIZATION; FULLERENE; ACRYLATE;

D O I：

10.1016/j.cplett.2020.138205

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

C-60 fullerene shows high reactivity with free radicals and is considered as a radical trapping agent. Addition reaction of radicals to C-60 was investigated by time-resolved Electron Paramagnetic Resonance (TR-EPR) and pulsed EPR methods. The structures of adduct radicals were determined by TR-EPR, and the reaction mechanism was clarified. Addition rate constants, k's of radicals to C-60 were measured by the electron spin echo detection method utilizing pulsed EPR. The measured k values were remarkably high and the reactions are diffusion-controlled. We discussed activation energy on the basis of the charge transfer effect and enthalpy change.

引用

页数：6

共 20 条

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