EVALUATING CHEMICAL EXCHANGE RATE CONSTANTS BETWEEN WATER AND HYDROXYL PROTONS IN NATURAL COMPOUNDS USING NMR TWO-DIMENSIONAL EXCHANGE SPECTROSCOPY AND GEOMETRIC AVERAGE METHOD

Chinese Journal of Magnetic Resonance ›› 2000, Vol. 17 ›› Issue (5): 349-361.

EVALUATING CHEMICAL EXCHANGE RATE CONSTANTS BETWEEN WATER AND HYDROXYL PROTONS IN NATURAL COMPOUNDS USING NMR TWO-DIMENSIONAL EXCHANGE SPECTROSCOPY AND GEOMETRIC AVERAGE METHOD

ZHANG Tao, MAO Xi-an

State Key Laboratory of Magnetic Resonance and Atomic Molecular Physics, Wuhan Institute of Physics and Mathematics, The Chinese Academy of Sciences, P. O. Box 71010, Wuhan 430071, China

Received:2000-07-04 Revised:2000-07-25 Published:2000-10-05 Online:2018-01-11

Abstract

Abstract: NMR two-dimensional exchange spectroscopy (EXSY) has been applied to measure the chemical exchange rate constants between water and hydroxyl protons in three natural organic compounds that contain four to eight hydroxyl groups. In data treatment, the simple geometric average (GA) method has been used. Application of the GA method to assumed exchange systems has indicated that the method is reliable.

Key words: 2D EXSY, Geometric average (GA) method, Exchange rate constnat, Water, Hydroxyl protons

CLC Number:

O482.53⁺2

ZHANG Tao, MAO Xi-an. EVALUATING CHEMICAL EXCHANGE RATE CONSTANTS BETWEEN WATER AND HYDROXYL PROTONS IN NATURAL COMPOUNDS USING NMR TWO-DIMENSIONAL EXCHANGE SPECTROSCOPY AND GEOMETRIC AVERAGE METHOD[J]. Chinese Journal of Magnetic Resonance, 2000, 17(5): 349-361.

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EVALUATING CHEMICAL EXCHANGE RATE CONSTANTS BETWEEN WATER AND HYDROXYL PROTONS IN NATURAL COMPOUNDS USING NMR TWO-DIMENSIONAL EXCHANGE SPECTROSCOPY AND GEOMETRIC AVERAGE METHOD

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