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Citation: Zhang Yong-Hong, Mao Xi-An. Chemical Exchange and Selfdiffusion Dynamics of Quercetin in Solutions[J]. Acta Physico-Chimica Sinica, ;2001, 17(04): 300-304. doi: 10.3866/PKU.WHXB20010404 shu

Chemical Exchange and Selfdiffusion Dynamics of Quercetin in Solutions

1.
State Key Laboratory of Magnetic Resource and Atomic Molecular Physics,Wuhan Institute of Physics ＆ Mathematics,Chinese Academy of Sciences,Wuhan　430071

Received Date: 18 August 2000
Available Online: 15 April 2001

The exchange rate constants of the labile protons in quercetin with water and the selfdiffusion coefficients of quercetin in DMSOd6 solutions with different water concentrations and at different temperatures are studied. When the water concentration or the temperature is changed,both exchange rates and diffusion coefficients are changed,but there is no correlation between these two changes. This indicates that chemical exchange of the labile protons with water and selfdiffusion of the quercetin molecule are two independent motions in solutions and chemical exchange is not controlled by diffusion. However,the apparent selfdiffusion coefficients of the labile protons are obviously affected by chemical exchange.
- Chemical exchange;Self-diffusion coefficients;Quercetin;Labile protons;NMR
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