- The effect of a mild base on curcumin in methanol and ethanol.
The effect of a mild base on curcumin in methanol and ethanol.
The journal of physical chemistry. A (2012-02-10)
Yuval Erez, Itay Presiado, Rinat Gepshtein, Dan Huppert
PMID22316057
ABSTRACT
Steady-state and time-resolved emission techniques were employed to study the effect of acetate, a mild base, on the luminescence of curcumin in methanol and ethanol. We found that the steady-state emission intensity as well as the average fluorescence decay time are reduced by a factor of 5 when the acetate concentration is raised to about 1.8 M. We attribute this large effect to an excited-state proton transfer (ESPT) from the acidic groups of curcumin to the acetate anion. We analyze the experimental data in terms of an ESPT reaction occurring between a photoacid and a base.
MATERIALS
Product Number
Brand
Product Description
SKU
Pack Size
Availability
Price
Quantity
SKU
Pack Size
Availability
Price
Quantity
SKU
Pack Size
Availability
Price
Quantity
SKU
Pack Size
Availability
Price
Quantity
SKU
Pack Size
Availability
Price
Quantity
SKU
Pack Size
Availability
Price
Quantity
SKU
Pack Size
Availability
Price
Quantity
Sigma-Aldrich
Potassium acetate, puriss., meets analytical specification of Ph. Eur., BP, E261, 99-101%
SKU
Pack Size
Availability
Price
Quantity
SKU
Pack Size
Availability
Price
Quantity