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Study on various fluorescein derivatives as pH sensors |
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| Authors: | Ha Na Kim KMK Swamy Juyoung Yoon |
| Institution: | a Department of Chemistry and Nano Science, Ewha Womans University, Seoul 120-750, Republic of Korea b Department of Bioinspired Science (WCU), Ewha Womans University, Seoul 120-750, Republic of Korea c Department of Pharmaceutical Chemistry, V.L. College of Pharmacy, Raichur 584 103, India |
| Abstract: | Various fluorescein derivatives were examined as fluorescent pH sensors. Fluorescein derivatives bearing benzylic amine moieties displayed opposite fluorescent changes compared to those of simple fluorescein derivatives upon pH changes. Photo-induced electron transfer (PET) mechanism controls the fluorescent changes of these derivatives. In this Letter, modulations of pKa values were successfully demonstrated through variations of substituent groups. |
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