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 Detalle_Publicacion

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

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.

 Fuente: J. Mater. Chem. C, Vol. 6, Pp. 7012-7017 (2018)

Editorial: Royal Society of Chemistry

 Fecha de publicación: 21/06/2018

Nº de páginas: 6

Tipo de publicación: Artículo de Revista

 DOI: 10.1039/c8tc00971f

ISSN: 2050-7526,2050-7534

 Proyecto español: MAT2016-80438-P

Url de la publicación: https://doi.org/10.1039/c8tc00971f

Autoría

HU, JIANXU

KARAMSHUK, S.

GORVACIOVA, J.

YE, HUANQING

LU, HAIZHOU

ZHANG, YUANPENG

ZHENG; Y. X.

LIANG, X.

MOTEVALLI, MAJID

ABRAHAMS, I.

WYATT, PETER B.

GILLIN, WILLIAM P.