On the sub-50 nanosecond luminescence rise in Tb-DPA complexes

Cristina Consani; Christoph Leithold; Wolfgang Lakata; Andreas Tortschanoff; Gerald Auböck

doi:10.1117/12.3022369

20 June 2024 On the sub-50 nanosecond luminescence rise in Tb-DPA complexes

Cristina Consani, Christoph Leithold, Wolfgang Lakata, Andreas Tortschanoff, Gerald Auböck

Proceedings Volume 13004, Nonlinear Optics and its Applications 2024; 130040V (2024) https://doi.org/10.1117/12.3022369
Event: SPIE Photonics Europe, 2024, Strasbourg, France

Conference Poster

Abstract

Dipicolinic acid (DPA), bound to calcium (Ca), is a main component of bacterial endospores. Complexation of DPA with lanthanide ions, particularly Terbium (Tb), allows for rapid detection via monitoring the lanthanide luminescence, with applications spanning from cell imaging to contamination and biohazard detection, to sterilization control. Here we present time-resolved luminescence of the Tb-DPA complex upon UV excitation at 266 nm. Our measurements directly monitor the luminescence dynamics and speak for a rise of the luminescence on the ns time scale, which is orders of magnitude faster than previously reported, and raise questions about the details of the energy transfer process in this complex and the states involved. The results are relevant for the design of more sensitive detection schemes for Tb-DPA fluorescence, as well as for the design of novel Tb-based luminescence probes or novel fluorescence probes working as FRET acceptors of Tb energy.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

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Cristina Consani, Christoph Leithold, Wolfgang Lakata, Andreas Tortschanoff, and Gerald Auböck "On the sub-50 nanosecond luminescence rise in Tb-DPA complexes", Proc. SPIE 13004, Nonlinear Optics and its Applications 2024, 130040V (20 June 2024); https://doi.org/10.1117/12.3022369

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