Luminescence and upconversion from thulium(III) species in solution
Luminescence and upconversion from thulium(III) species in solution
复制标题
DOI：
10.1039/c2cp42228j
复制
发表时间：
2012-01-01
影响因子：
3.3
通讯作者：
Faulkner, Stephen
中科院分区：
文献类型：
--
作者：
Blackburn, Octavia A.;Tropiano, Manuel;Faulkner, Stephen
钍盐和配合物被证明是发射从三个状态中的激发态歧管的Tm 3+。D-1（2）态的形成可以导致发光，或者导致能量转移到较低能量的（1）G（4）和H-3（4）发射态。在发色团存在于配体结构中的情况下，发射被限制为以钍为中心的发射态，其能量低于以发色团为中心的供体态。我们还观察到了钍激发态流形的直接多光子激发。此外，在多光子激发光谱中观察到额外的跃迁，这与上转换一致，这是由于连续的单光子吸收和弛豫过程中的钍激发态歧管。
Thulium salts and complexes are shown to be emissive from three states in the excited state manifold of Tm3+. Formation of the D-1(2) state can result in luminescence, or in energy transfer to the lower energy (1)G(4) and H-3(4) emissive states. Where chromophores are present in the ligand structure, emission is restricted to thulium centred emissive states that are lower in energy than the chromophore centred donor state. We have also observed direct multi-photon excitation of the thulium excited state manifold. Furthermore, additional transitions are observed in the multi-photon excitation spectra that are consistent with upconversion as a consequence of sequential single photon absorption and relaxation processes within the thulium excited state manifold.