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http://hdl.handle.net/10397/81147
Title: | Breaking the 1,2-HOPO barrier with a cyclen backbone for more efficient sensitization of eu(III) luminescence and unprecedented two-photon excitation properties | Authors: | Dai, LX Lo, WS Gu, YJ Xiong, QW Wong, KL Kwok, WM Wong, WT Law, GL |
Issue Date: | 2019 | Source: | Chemical science, 7 May 2019, v. 10, no. 17, p. 4550-4559 | Abstract: | A cyclen backbone was utilized to study the effect of backbone rigidity on Eu(III) luminescence sensitization using a 1,2-HOPO derivative and 2-thenoyltrifluoroacetonate (TTA) as chromophores. The restriction of molecular movement of Eu-Cy-HOPO brought about by the increased rigidity provided a tightly packed coordination environment for the octadentate Eu(III) center which resulted in the highest overall quantum yield (30.2%) and sensitization efficiency (64.6%) among 1,2-HOPO sensitized Eu(III) complexes. Eu-Cy-HOPO is also the first 1,2-HOPO-based lanthanide complex to emit Eu(III) luminescence under two-photon excitation. | Publisher: | Royal Society of Chemistry | Journal: | Chemical science | ISSN: | 2041-6520 | EISSN: | 2041-6539 | DOI: | 10.1039/c9sc00244h | Rights: | This journal is © The Royal Society of Chemistry 2019 This article is licensed under a Creative Commons Attibution-NonCommercial 3.0 Unported Licence (https://creativecommons.org/licenses/by-nc/3.0/) The following publication Dai, L. X., Lo, W. S., Gu, Y. J., Xiong, Q. W., Wong, K. L., Kwok, W. M., … & Law, G. L. (2019). Breaking the 1,2-HOPO barrier with a cyclen backbone for more efficient sensitization of eu(III) luminescence and unprecedented two-photon excitation properties. Chemical science, 10(17), 4550-4559 is available at https://dx.doi.org/10.1039/c9sc00244h |
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