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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 30, Number 1
BKCSDE 30(1)
January 20, 2009 

Low-Frequency Ultrasonic Relaxation of β-Cyclodextrin and Adenosine 5'-Monophosphate in Aqueous Solution
Jong Rim Bae, ChangWoo Lee*
Cyclodextrin, Nucleotide, Host-guest interaction, Ultrasonic wave
Nucleotides are the building blocks of nucleic acids and essential for many cellular functions. In this study, ultrasonic absorption spectra of β-cyclodextrin (β-CD) and adenosine 5'-monophosphate (AMP) in aqueous solution were measured over the broad frequency range 0.1-40 MHz with emphasis on the low-frequency range below 1 MHz. Here we show that the interaction of β-CD and AMP complies with a typical spectrum of a single relaxation process. We determined reliable rate (kb) and equilibrium (K) constants and a standard volume change (V) of the reaction. They are kb = 2.3×10-6s-1, K = 89 M-1, and V = 13.8 (10-6m3mol-1), respectively.
145 - 148
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