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Responsive two-photon induced europium emission as fluorescent indicator for paralytic shellfish saxitoxin.

Shuzhong He,Hongguang Li,Yuk-Wang Yip,Chi-Tung Yeung,Yuen On Fung,Hoi-Kuan Kong,Ho-Lun Yeung,Ga-Lai Law, Ka-Leung Wong,Chi-Sing Lee,Michael Hon-Wah Lam,Margaret B Murphy,Paul Kwan-Sing Lam,Wing-Tak Wong

Organic letters（2011）

Cited 6|Views34
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Abstract
A water-soluble europium(III) complex (1) has been synthesized and demonstrated to be a specific fluorescence probe for the paralytic shellfish toxin saxitoxin, a neurotoxin that blocks the voltage-gated sodium channels on cell membranes. Saxitoxin binds to the europium complex (K(B) = 6.1 × 10(4) M(-1)) and triggers a two-photon induced f-f emission enhancement by over 100% and increases the two-photon absorption cross-section from 9 to 36 GM.
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TERBIUM,LUMINESCENCE,COMPLEXES,CHEMOSENSOR,MICROSCOPY,EXCITATION
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