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- W1824503206 abstract "Abstract The convenient preparation of two types of water‐soluble gold nanoparticles coated with mannose–ferrocene conjugates is reported herein. The preparation involved the use of unsymmetrical 1,1′‐bis‐substituted ferrocene building blocks that allowed their sequential orthogonal coupling with propargyl α‐ D ‐mannopyranoside and disulfide‐functionalized linkers used to anchor the mannose–ferrocene conjugate to the metal surface. The nanoparticles differ in the way the linker is bound to the ferrocene cyclopentadienyl ring: Either through an amide bond or a triazolylmethyl group. Although the former were unstable in water under exposure to light but stable in darkness, the latter were stable under both conditions. The mannose–ferrocene‐coated gold nanoparticles exhibited sensing abilities towards mannose‐binding lectin concanavalin A by both optical and electrochemical methods, based on the surface‐plasmon‐resonance (SPR)‐shift properties of the metal and the electrochemical activity of the ferrocene moiety, respectively. Moreover, they could be used to detect concanavalin A with high sensitivity in the low nanomolar range by electrochemical methods. A comparison of their redox‐sensing abilities with those reported for mono‐ and bivalent mannose–ferrocene conjugates revealed that the multivalent presentation of both mannose and ferrocene units led to a remarkable enhancement of sensitivity, the limit of detection being at least three orders of magnitude lower than for the single conjugates." @default.
- W1824503206 created "2016-06-24" @default.
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- W1824503206 date "2013-04-05" @default.
- W1824503206 modified "2023-10-10" @default.
- W1824503206 title "Gold-Ferrocene Glyco-Nanoparticles for High-Sensitivity Electrochemical Detection of Carbohydrate-Lectin Interactions" @default.
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- W1824503206 doi "https://doi.org/10.1002/ejoc.201300205" @default.
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