The interaction of linear, amylose oligomers with iodine

A series of linear, amylose oligomers has been synthesized enzymically to yield samples having the number-average degree of polymerisation, D P n ¯ , in the range 22 to 134. The interaction of these materials with iodine has been studied. The wavelength of maximal absorption of the iodine complex, λ...

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Bibliographic Details
Published in:Carbohydrate research 1971, Vol.17 (1), p.25-33
Main Authors: Banks, W., Greenwood, C.T., Khan, K.M.
Format: Article
Language:English
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Summary:A series of linear, amylose oligomers has been synthesized enzymically to yield samples having the number-average degree of polymerisation, D P n ¯ , in the range 22 to 134. The interaction of these materials with iodine has been studied. The wavelength of maximal absorption of the iodine complex, λ max, has been found to be related to D P n ¯ by the Langmuir isotherm: 1 / λ max ⁡ = 1.558 × 10 − 3 + 102.5 × 10 − 4 ( 1 / D P n ¯ ) . Differential, potentiometric titration of iodine has shown that the iodine-binding capacity of the linear oligomers is a function of both D P n ¯ and temperatures. The enthalpy of the iodine uptake has been measured, and found to be a function of D P n ¯ for values of D P n ¯
ISSN:0008-6215
1873-426X
DOI:10.1016/S0008-6215(00)81539-6