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Responsive Lanthanide Coordination Polymer for Hydrogen Sulfide

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journal contribution
posted on 19.11.2013, 00:00 by Baoxia Liu, Yang Chen
Metal organic coordination polymers have received great attention because of their flexible compositions and architecture. Here, we report the design and synthesis of a responsive lanthanide coordination polymer (LCP) for hydrogen sulfide (H2S), utilizing self-assembling of biomolecule nucleotide with luminescent terbium ion (Tb3+) and sensitizing silver ion (Ag+) in aqueous solution. LCP is highly fluorescent due to the inclusion of Ag+ ions, which sensitized the fluorescence of Tb3+ ions. H2S can strongly quench the fluorescence of LCP through its high affinity for Ag+ ions. Such configurated LCP material from initial building blocks showed high sensitivity and selectivity for H2S and was applied to the determination of H2S in human serum. LCP with Tb3+ ions also has a long fluorescence lifetime, which allows for time-resolved fluorescence assays, possessing particular advantages to probing H2S in biological systems with autofluorescence.