pH-dependent fluorescence property of methyl red isomers in silver colloids |
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Authors: | Jian-How WongSzetsen Lee |
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Affiliation: | Department of Chemistry and Center for Nano-technology, Chung Yuan Christian University, Jhongli, Taoyuan 32023, Taiwan |
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Abstract: | We report the use of silver (Ag) colloids in the spectroscopic differentiation of methyl red (MR) isomers (o-MR, m-MR, p-MR) by fluorescence techniques. Under different pH conditions, the formation of MR-Ag complex has an impact on the fluorescence band shapes and peak position shift, which are distinctive between MR isomers. The fluorescence quenching between 400 and 414 nm accompanied by simultaneous enhancement between 510 and 541 nm changes with pH are closely related to energy transfer efficiency and the interaction between the MR isomers and the Ag surface. |
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Keywords: | Methyl red Fluorescence Silver colloid |
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