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Acta Chimica Sinica ›› 2011, Vol. 69 ›› Issue (11): 1375-1380. Previous Articles
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庞雪,申前进,赵晓冉,晋卫军*
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国家自然科学基金项目
PANG Xue, SHEN Qian-Jin, ZHAO Xiao-Ran, JIN Wei-Jun
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The hyperfine splitting constants, AN, of electron spin probe, 4-hydroxy-2,2,6,6-tetramethyl-1- piperidin-1-yloxy, free radical (4-OH-TEMPO) show positive linear correlation with model reaction parameters of solvent polarity, ET(30) and solvent acceptor number (AN). Moreover, generally, AN values are higher in halogenated than non halogenated solvents as dielectron constant or dipole moment is near. Besides the general solvent effect on AN values, larger AN values can be attributed to the specific halogen-bonding between N—O free radical and halogenated solvent molecule. The calculation shows the occurrence of C—Cl…O between chloroform or dichloromethane and free radical molecules.
Key words: halogen-bonding, electron spin resonance, specific solvent effect, halogenated solvent, solvent acceptor number
PANG Xue, SHEN Qian-Jin, ZHAO Xiao-Ran, JIN Wei-Jun. Investigation on Specific Effect of Halogenated Solvents by ESR Probe[J]. Acta Chimica Sinica, 2011, 69(11): 1375-1380.
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