2,5-Bis(p-R-arylethynyl)rhodacyclopentadienes Show Intense Fluorescence: Denying the Presence of a Heavy Atom
作者:Andreas Steffen、Meng Guan Tay、Andrei S. Batsanov、Judith A. K. Howard、Andrew Beeby、Khuong Q. Vuong、Xue-Zhong Sun、Michael W. George、Todd B. Marder
DOI:10.1002/anie.200905697
日期:2010.3.22
Heavy‐metal light show: Photophysical studies show unprecedented high fluorescence quantum yields (Φf up to 69 %, τf≈1–3 ns) and unexpectedly slow intersystem crossing for a series of rhodium complexes. This new class of compounds challenges our understanding of the behavior of excited electronic states and the role of the heavyatom in intersystem crossing processes. Mes=mesityl, THF=tetrahydrofuran
Reductive Coupling of Diynes at Rhodium Gives Fluorescent Rhodacyclopentadienes or Phosphorescent Rhodium 2,2’-Biphenyl Complexes
作者:Carolin Sieck、Meng Guan Tay、Marie-Hélène Thibault、Robert M. Edkins、Karine Costuas、Jean-François Halet、Andrei S. Batsanov、Martin Haehnel、Katharina Edkins、Andreas Lorbach、Andreas Steffen、Todd B. Marder
DOI:10.1002/chem.201601912
日期:2016.7.18
different photophysical properties. As a result of a [2+2] reductive coupling at Rh, 2,5‐bis(arylethynyl)rhodacyclopentadienes (A) are formed, which display intensefluorescence (Φ=0.07–0.54, τ=0.2–2.5 ns) despite the presence of the heavy metal atom. Rhodium biphenyl complexes (B), which show exceptionally long‐lived (hundreds of μs) phosphorescence (Φ=0.01–0.33) at room temperature in solution, have
Fluorescence in Rhoda- and Iridacyclopentadienes Neglecting the Spin–Orbit Coupling of the Heavy Atom: The Ligand Dominates
作者:Andreas Steffen、Karine Costuas、Abdou Boucekkine、Marie-Hélène Thibault、Andrew Beeby、Andrei S. Batsanov、Azzam Charaf-Eddin、Denis Jacquemin、Jean-François Halet、Todd B. Marder
DOI:10.1021/ic501115k
日期:2014.7.7
We present a detailed photophysical study and theoretical analysis of 2,5-bis(arylethynyl)rhodacyclopenta-2,4-dienes (1a–c and 2a–c) and a 2,5-bis(arylethynyl)iridacyclopenta-2,4-diene (3). Despite the presence of heavyatoms, these systems display unusually intensefluorescence from the S1 excited state and no phosphorescence from T1. The S1 → T1 intersystem crossing (ISC) is remarkably slow with