Friend or foe? The role of solvents in non-triplet, intraligand charge transfer sensitization of lanthanide(<scp>iii</scp>) luminescence
作者:Wai-Sum Lo、Wing-Tak Wong、Ga-Lai Law
DOI:10.1039/c6ra15365h
日期:——
Sensitization of lanthanide luminescence in the visible and near infra-red (NIR) region was achieved via a non-triplet energy transfer pathway by long-wavelength excitation of an intraligand charge transfer (ILCT) band of a diethylamino-based ligand system. A comprehensive photophysical and solvatochromic study is conducted to evaluate the luminescence properties of our Eu(III), Sm(III) and Yb(III)
Impressive Europium Red Emission Induced by Two-Photon Excitation for Biological Applications
作者:Wai-Sum Lo、Wai-Ming Kwok、Ga-Lai Law、Chi-Tung Yeung、Chris Tsz-Leung Chan、Ho-Lun Yeung、Hoi-Kuan Kong、Chi-Hang Chen、Margaret B. Murphy、Ka-Leung Wong、Wing-Tak Wong
DOI:10.1021/ic102465j
日期:2011.6.20
Three triazine-based europium(III) complexes were synthesized that demonstrated strong two-photon induced europium emission with a high two-photon absorption cross-section. The modified triazine ligand of complex 3 initiated over 100% enhancement of the two-photon absorption cross-section (sigma(2): 320 GM) when compared with complex 1 (sigma(2): 128 GM) in a solution of DMSO. Europium complex 3 is also stable in vitro, and power-dependence curves were obtained in vitro to confirm the two-photon-induced f-f emission in HeLa cells.