作者:Alexander J. Blake、Rocío Donamaría、Eduardo J. Fernández、Tania Lasanta、Vito Lippolis、José M. López-de-Luzuriaga、Elena Manso、Miguel Monge、M. Elena Olmos
DOI:10.1039/c3dt51334c
日期:——
The polymeric Au/Tl compounds [Au(C6X5)2}Tl]n (X = Cl, F) react with the crown thioethers 1,4,7-trithiacyclononane ([9]aneS3), 1,5,8,11-tetrathiacyclotetradecane ([14]aneS4), and 1,4,7,10,13,16,19,22-octathiacyclotetracosane ([24]aneS8) in an appropriate molar ratio to afford [Au(C6X5)2}Tl(L)]2 [L = [9]aneS3, X = Cl (1), F (4); L = [14]aneS4, X = Cl (2), F (5)], [Au(C6Cl5)2}2Tl2([24]aneS8)]n (3) or [Au(C6F5)2}2Tl2([24]aneS8)] (6). X-ray diffraction studies of 3, 4 and 6 reveal polymeric (3) or tetranuclear (4, 6) structures formed via TlâS bonds and Auâ¯Tl or Auâ¯Tl and Auâ¯Au contacts. All the complexes are luminescent in the solid state, but not in solution, where the metalâmetal interactions, which are responsible for the luminescence, are no longer present. DFT calculations on representative model systems of complexes 3, 4 and 6 have also been carried out in order to determine the origin of the electronic transitions responsible for their optical properties.
聚合 Au/Tl 化合物 [Au(C6X5)2}Tl]n (X = Cl, F) 与冠硫醚 1,4,7-三硫杂环壬烷 ([9]aneS3), 1,5,8,11 反应-四硫环十四烷([14]aneS4)和1,4,7,10,13,16,19,22-八硫环二十烷([24]aneS8)以适当的摩尔比提供[Au(C6X5)2}Tl( L)]2 [L = [9]aneS3, X = Cl (1), F (4); L = [14]aneS4, X = Cl (2), F (5)], [Au(C6Cl5)2}2Tl2([24]aneS8)]n (3) 或 [Au(C6F5)2}2Tl2 ([24]aneS8)](6)。 3、4和6的X射线衍射研究揭示了通过Tl-S键和Au-Tl或Au-Tl和Au-Au接触形成的聚合(3)或四核(4、6)结构。所有配合物在固态下都会发光,但在溶液中则不会发光,因为溶液中导致发光的金属-金属相互作用不再存在。还对配合物 3、4 和 6 的代表性模型系统进行了 DFT 计算,以确定决定其光学性质的电子跃迁的起源。