Towards rainbow photo/electro-luminescence in copper(<scp>i</scp>) complexes with the versatile bridged bis-pyridyl ancillary ligand
作者:Gilbert Umuhire Mahoro、Elisa Fresta、Margaux Elie、Davide di Nasso、Qi Zhang、Jean-François Lohier、Jean-Luc Renaud、Mathieu Linares、Reinhold Wannemacher、Juan Cabanillas-Gonzalez、Rubén D. Costa、Sylvain Gaillard
DOI:10.1039/d1dt01689j
日期:——
synthesis and characterization of a family of copper(I) complexes bearing a bridged bis-pyridyl ancillary ligand is reported, highlighting how the bridge nature impacts the photo- and electro-luminescent behaviours within the family. In particular, the phosphonium bridge led to copper(I) complexes featuring good electrochemical stability and high ionic conductivity, as well as a stark blue-to-orange luminescence
报道了带有桥接双吡啶基辅助配体的铜 ( I ) 配合物家族的合成和表征,突出了桥接性质如何影响该家族内的光致和电致发光行为。特别是,鏻桥导致铜(I)配合物具有良好的电化学稳定性和高离子电导率,以及与其他配合物相比明显的蓝色到橙色发光转变。这导致高性能发光电化学电池在大约10 mJ 的稳定性。40 cd m -2比其他复合体高一个数量级。总的来说,这项工作揭示了双吡啶基辅助配体的桥接性质对光物理特征、成膜以及最终器件性能的关键作用。
Role of the Bridging Group in Bis‐Pyridyl Ligands: Enhancing Both the Photo‐ and Electroluminescent Features of Cationic (IPr)Cu
<sup>I</sup>
Complexes
作者:Margaux Elie、Michael D. Weber、Florent Di Meo、Fabien Sguerra、Jean‐François Lohier、Robert B. Pansu、Jean‐Luc Renaud、Matthieu Hamel、Mathieu Linares、Rubén D. Costa、Sylvain Gaillard
DOI:10.1002/chem.201703270
日期:2017.11.16
group X of bis‐pyridyl ligands, that is, Py‐X‐Py where X is NH, CH2, C(CH3)2, or PPh, on the photo‐ and electroluminescent properties of a new family of luminescent cationic H‐heterocyclic carbene (NHC) copper(I) complexes. A joint experimental and theoretical study demonstrates that the bridging group affects the molecular conformation from a planar‐like structure (X is NH and CH2) to a boat‐like
A composition comprising a polymerizable compound of the formula (1) and a rod-shaped polymerizable liquid crystal compound:
P2-E2-X2-B2-A2-(G2)t-Y-(G1)s-A1-B1-X1-E1-P1 (1)
(in the formula (1), Y represents a di-valent group, s and t represent each independently an integer of 0 or 1, G1 and G2 when s and t are 1 represent each independently —CR
1
R
2
—, R
1
and R
2
represent each independently an alkyl group having 1 to 4 carbon atoms, halogen atom or hydrogen atom, A1 and A2 represent each independently a di-valent cyclic hydrocarbon group, di-valent heterocyclic group, methylenephenylene group, oxyphenylene group or thiophenylene group, B1 and B2 represent each independently a di-valent group, X1 and X2 represent each independently a di-valent group, E1 and E2 represent each independently an alkylene group having 2 to 25 carbon atoms, and P1 and P2 represent a hydrogen atom or polymerizable group, at least one of P1 and P2 being a polymerizable group.).
Multiple binding modes of an unconjugated bis(pyridine) ligand stabilize low-valent [Cp*Rh] complexes
作者:Davide Lionetti、Victor W. Day、Benedikt Lassalle-Kaiser、James D. Blakemore
DOI:10.1039/c7cc09164h
日期:——
show that, in a model rhodium complex supported by the pentamethylcyclopentadienyl ligand (Cp*), the analogous dimethyldipyridylmethane ligand (Me2dpma) enforces a bpy-like coordination environment but disrupts the inter-ring conjugation responsible for charge delocalization upon metal reduction. As a result, reduction proceeds in discrete one-electron steps (Rh(III) to Rh(II) to Rh(I)), contrasting with
Structural and chemical properties of half-sandwich rhodium complexes supported by the bis(2-pyridyl)methane ligand
作者:Davide Lionetti、Victor W. Day、James D. Blakemore
DOI:10.1039/c9dt01821b
日期:——
by cyclic voltammetry; related electron paramagnetic resonance (EPR) spectroscopic studies confirm access to the unusual rhodium(II) oxidation state. Further reduction to the formally rhodium(I) oxidation state, however, is followed by deprotonation of dpma, as observed in electrochemical studies and chemical reduction experiments. This reactivity can be understood to occur as a consequence of the presence