TY - JOUR
T1 - Direct two-photon excitation of Sm3+, Eu3+, Tb3+, Tb.DOTA-, and Tb.propargylDO3A in solution
AU - Sørensen, Thomas Just
AU - Blackburn, Octavia A.
AU - Tropiano, Manuel
AU - Faulkner, Stephen
PY - 2012/7/10
Y1 - 2012/7/10
N2 - We have observed direct two-photon excitation of samarium, europium and terbium ions in solution upon near IR excitation using a tuneable pulsed light source, and have also studied two-photon processes in a pair of related terbium complexes, namely [Tb.DOTA] - and Tb.propargylDO3A. Direct two-photon excitation of lanthanides is observed in simple systems in the absence of sensitizing chromophores. Where even simple chromophores such as a triple bond are present in the complex, then single and two-photon excitation of chromophore excited states competes with direct two-photon excitation of the ions and is the dominant pathway for sensitizing formation of the lanthanide excited state.
AB - We have observed direct two-photon excitation of samarium, europium and terbium ions in solution upon near IR excitation using a tuneable pulsed light source, and have also studied two-photon processes in a pair of related terbium complexes, namely [Tb.DOTA] - and Tb.propargylDO3A. Direct two-photon excitation of lanthanides is observed in simple systems in the absence of sensitizing chromophores. Where even simple chromophores such as a triple bond are present in the complex, then single and two-photon excitation of chromophore excited states competes with direct two-photon excitation of the ions and is the dominant pathway for sensitizing formation of the lanthanide excited state.
U2 - 10.1016/j.cplett.2012.05.053
DO - 10.1016/j.cplett.2012.05.053
M3 - Journal article
SN - 0009-2614
VL - 541
SP - 16
EP - 20
JO - Chemical Physics Letters
JF - Chemical Physics Letters
ER -