Enhancing the sensitization efficiency of erbium doped organic complexes by heavy halogen substitution

J. X. Hu; S. Karamshuk; J. Gorbaciova; H. Q. Ye; H. Lu; Y. P. Zhang; Y. X. Zheng; X. Liang; M. Motevalli; I. Abrahams; I. Hernández; P. B. Wyatt; W. P. Gillin

doi:10.1039/C8TC00971F

Enhancing the sensitization efficiency of erbium doped organic complexes by heavy halogen substitution†

J. X. Hu,

^a S. Karamshuk,^ab J. Gorbaciova,^a H. Q. Ye,

^a H. Lu,

^c Y. P. Zhang,^a Y. X. Zheng,

^d X. Liang,^d M. Motevalli,^b I. Abrahams,

^b I. Hernández,

^e P. B. Wyatt

*^b and W. P. Gillin

*^af

Author affiliations

* Corresponding authors

^a Materials Research Institute and School of Physics and Astronomy, Queen Mary University of London, Mile End Road, London E1 4NS, UK
E-mail: w.gillin@qmul.ac.uk

^b Materials Research Institute and School of Biological and Chemical Sciences, Queen Mary University of London, Mile End Road, London E1 4NS, UK
E-mail: p.b.wyatt@qmul.ac.uk

^c State Key Laboratory of ASIC and System, SIST, Fudan University, Shanghai 200433, China

^d State Key Laboratory of Coordination Chemistry, Nanjing National Laboratory of Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China

^e Dpto. CITIMAC, Facultad de Ciencias, Universidad de Cantabria, Avda. Los Castros, s/n 39005 Santander, Spain

^f College of Physical Science and Technology, Sichuan University, Chengdu 610064, China

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.

Journal of Materials Chemistry C

Enhancing the sensitization efficiency of erbium doped organic complexes by heavy halogen substitution†

Abstract

Supplementary files

Article information

Download Citation

Permissions

Enhancing the sensitization efficiency of erbium doped organic complexes by heavy halogen substitution

Social activity

Search articles by author

Spotlight

Advertisements