Spectral Properties of a pH Responsive Water Soluble Spironaphthoxazine and Its Multi-Switching Property

Bae, Jin-Seok; Kim, Sung Hoon

doi:10.5764/tcf.2013.25.1.18

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2015

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“…The stoichiometry and association constant of the curcumin-ethylamine complex are established by use of the Benesi-Hildebrand method [15][16][17][18] . When assuming a 1:1 association between curcumin and ethylamines, the Benesi-Hildebrand expression(1) is given as follows: …”

Section: Benesi-hildebrandmentioning

confidence: 99%

Study on the Interaction between Curcumin and Ethylamines by Absorption and Fluorescence Spectroscopic Techniques

Kim¹,

Gwon²,

Lee³

et al. 2015

Textile Coloration and Finishing

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Abstract:The interaction between curcumin(1,7-bis[4-hydroxy-3-methoxyphenyl]-1,6-heptadiene-3,5-dione) and ethylamines was studied in DMSO:H2O(5:1, v/v) using absorption and fluorescence measurements. The association constant, Kass, and the Stern-Volmer constants were calculated by the Benesi-Hildebrand and Stern-Volmer equation, respectively. Curcumin displayed marked UV-Vis absorption changes and highly responsive fluorescence quenching in the presence of ethylamine and the quenching ability was enhanced almost linearly with the concentration of ethylamines. The apparent Stern-Volmer constant measured for the ethylamine-curcumin system was about 1000-fold greater than that of the triethylamine-curcumin system, indicating considerably greater quenching efficiency of ethylamines.

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Section: Benesi-hildebrandmentioning

confidence: 99%