Marta Antoniv, S. Sherry Zhu*, Gawain Thomas and Martin E. Poitzsch,
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Synthesis and Application of Time-Gated Fluorescent Tags for Tracing Downhole Fluids and Mineral Samples
We have developed a nanoparticle (NP) composed of a polystyrene-vinyl benzoic acid copolymer via one-pot emulsion polymerization. This NP anchors a Eu3+ complex with a 1,10-phenanthroline antenna ligand (PS-VBA-Eu-Phen). With only 15 mol % of the Eu3+ ion relative to styrene, this low-cost and readily scalable NP exhibits the characteristic luminescence of ligand-to-metal charge transfer from the Eu3+ complex. We determined the lifetime and the intrinsic quantum yield of the strongest 5D0 → 7F2 luminescence for the Eu3+ complex inside the NPs. The long lifetime of the luminescence ensures clear detection of the PS-VBA-Eu-Phen NPs in complex oil-based mud (OBM) and on mineral samples (cuttings) recovered from the OBM using time-gated emission measurement. This method effectively reduces the background emission from minerals or additives in the mud and promises potential applications of the NP as a tracer or tag for tracking downhole fluids and cuttings.
期刊介绍：
Energy & Fuels publishes reports of research in the technical area defined by the intersection of the disciplines of chemistry and chemical engineering and the application domain of non-nuclear energy and fuels. This includes research directed at the formation of, exploration for, and production of fossil fuels and biomass; the properties and structure or molecular composition of both raw fuels and refined products; the chemistry involved in the processing and utilization of fuels; fuel cells and their applications; and the analytical and instrumental techniques used in investigations of the foregoing areas.
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