An anionic layered europium(iii) coordination polymer for solvent-dependent selective luminescence sensing of Fe3+ and Cu2+ ions and latent fingerprint detection

An anionic layered coordination polymer [Eu(BTEC)0.5(HCOO)(H2O)2] (1) has been successfully synthesized via a solvothermal method (H4BTEC = 1,2,4,5-benzenetetracarboxylic acid, HCOOH = formic acid). Compound 1 possesses two-dimensional layers, which further generate a three-dimensional supramolecula...

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Published inDalton transactions : an international journal of inorganic chemistry Vol. 47; no. 48; pp. 17479 - 17485
Main Authors Shi, Yangwei, Ye, Junwei, Ye Qi, Muhammad Awais Akram, Rauf, Abdul, Ning, Guiling
Format Journal Article
LanguageEnglish
Published Cambridge Royal Society of Chemistry 28.12.2018
Subjects
Absorption spectra
Aluminum
Calcium ions
Cobalt
Coordination polymers
Copper
Crystal structure
Crystallography
Europium
Ferric ions
Fingerprints
Fluorescence
Formic acid
Hydrogen bonds
Latent fingerprints
Luminescence
Luminescence quenching
Polymers
Quenching
Selectivity
Substrates
Water chemistry
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Summary:An anionic layered coordination polymer [Eu(BTEC)0.5(HCOO)(H2O)2] (1) has been successfully synthesized via a solvothermal method (H4BTEC = 1,2,4,5-benzenetetracarboxylic acid, HCOOH = formic acid). Compound 1 possesses two-dimensional layers, which further generate a three-dimensional supramolecular network by hydrogen bonds existing between carboxylic oxygen, formate anion and H2O molecules of two adjacent layers. Interestingly, 1 shows high luminescence quenching efficiency upon addition of Fe3+ ions when it was dispersed in water even in the presence of interfering ions such as Na+, Ag+, Ca2+, Cd2+, Co2+, Cu2+, Mg2+, Mn2+, Zn2+ and Al3+. When dispersed in DMSO solution, 1 displays excellent sensitivity and selectivity towards both Cu2+ and Fe3+ ions. Possible quenching mechanisms for detection of Fe3+ and Cu2+ ions were carefully investigated and proposed based on a dynamic quenching process, static quenching process and fluorescence inner filter effect. Moreover, the as-prepared particles can be used for visualizing latent fingerprints on various substrates. These results indicate that a Eu(iii)-based coordination polymer has great potential in detection and security application.
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ISSN:1477-9226
1477-9234
DOI:10.1039/c8dt04042g