@article{10902/32915,
year = {2018},
month = {6},
url = {https://hdl.handle.net/10902/32915},
abstract = {Lanthanide complexes with organic ligands have been of interest due to the possibility of sensitising lanthanide ions through the antenna effect. We have recently shown that the zinc(II) salt of 2-(3,4,5,6-tetrafluoro-2-hydroxyphenyl)-4,5,6,7-tetrafluorobenzothiazole, Zn(FBTZ)2, can provide very high levels of sensitisation to organic erbium complexes whilst maintaining very high quantum yields for the erbium near-infra-red luminescence. We now report the spectroscopic properties of the zinc(II) salts of 2-(3,4,5,6-tetrafluoro-2-hydroxyphenyl)-6-chloro-4,5,7-trifluorobenzothiazole and 2-(3,4,5,6-tetrafluoro-2-hydroxyphenyl)-6-bromo-4,5,7-trifluorobenzothiazole. The substitution of a single chlorine atom into the chromophore is sufficient to double the sensitisation efficiency compared to the fully fluorinated chromophore. This result implies a 50% reduction in the pump intensity needed to achieve population inversion in the erbium ions.},
organization = {London (QMUL). S. K. was supported by a Proof of Concept grant funded by QMUL and the EPSRC through the Silicon Photonics for Future Systems grant EP/L00044X. J. G. was financially supported by QMUL. I. H. acknowledges financial support from the Spanish Ministerio de Economia y Competitividad (Grant: MAT2016-80438-P). Y. Z. acknowledges financial support from the Major State Basic Research Development Program (2013CB922101) and NSFC (21371093). W. P. G. acknowledges financial support from EPSRC (EP/L020114/1
and EP/P007767/1) and from NSFC (61574095). We are grateful to the EPSRC UK National Mass Spectrometry Facility at Swansea University for spectra.},
publisher = {Royal Society of Chemistry},
publisher = {Journal of Materials Chemistry C, 2018, 6(26), 7012-7017},
title = {Enhancing the sensitization efficiency of erbium doped organic complexes by heavy halogen substitution},
author = {Hu, Jianxu and Karamshuk, S. and Gorvaciova, J. and Ye, Huanqing and Lu, Haizhou and Zhang, Yuanpeng and Zheng; Y. X. and Liang, X. and Motevalli, Majid and Abrahams, I. and Hernández Campo, Ignacio and Wyatt, Peter B. and Gillin, William P.},
}