A terbium(iii)-based coordination polymer for time-resolved determination of hydrogen sulfide in human serum via displacement of copper(ii). Issue 6 (1st February 2017)

• Record Type: Journal Article
• Authors: Chen, Lili; Huang, Penghui; Tan, Hongliang; Wang, Li
• Is Part Of: Analytical methods. Volume 9:Issue 6(2017)
• Page Start: 1004
• Page End: 1010
• Publication Date: 2017-02-01
• Subjects: Chemistry, Analytic -- Periodicals; Analytical biochemistry -- Periodicals; Chemical laboratories -- Standards -- Periodicals; 543.1905
• DOI: 10.1039/c6ay02833k
• Languages: English
• ISSNs: 1759-9660

Abstract

Abstract : Lanthanide coordination polymers (LCPs) have attracted great interest because of their special photophysical properties, diverse compositions and architecture. Abstract : Lanthanide coordination polymers (LCPs) have attracted great interest because of their special photophysical properties, diverse compositions and architecture. Here, we describe the design and synthesis of LCP containing guanosine monophosphate (GMP), oxalate (OX) and terbium ions (Tb 3+ ), which works as a fluorescent probe for the determination of hydrogen sulfide (H2 S). The fluorescence of the LCP was quenched by Cu 2+ which bound to the system to form a complex of GMP/Tb/OX–Cu. On addition of sulfide, Cu 2+ was displaced from the GMP/Tb/OX–Cu CP due to formation of CuS. This resulted in a strong increase in fluorescence which was measured in the time-resolved mode. Among the various anions studied, only sulfide showed this effect. As a probe for the detection of H2 S, GMP/Tb/OX–Cu CP showed a good linear response for H2 S in the range from 1 to 60 μM with a detection limit of 0.5 μM. GMP/Tb/OX–Cu CP as a fluorescent probe displayed excellent selectivity to H2 S. Furthermore, GMP/Tb/OX–Cu CP was successfully applied to measure the level of H2 S in human serum samples and satisfactory results were obtained. We believe that the presented strategy might create new avenues for the design and application of fluorescent probes based on LCPs.