A compound of formula (I): wherein R
1
in each occurrence is independently H or a substituent; R
2
in each occurrence is independently a substituent; p in each occurrence is 0, 1, 2, 3 or 4 and Y is a ligand, with the proviso that at least one R
1
is a substituent or at least one p is at least 1.
When two are better than one: bright phosphorescence from non-stereogenic dinuclear iridium(<scp>iii</scp>) complexes
作者:Ruth E. Daniels、Stacey Culham、Michael Hunter、Marcus C. Durrant、Michael R. Probert、William Clegg、J. A. Gareth Williams、Valery N. Kozhevnikov
DOI:10.1039/c6dt00881j
日期:——
highest-energy emitter is the cyanide derivative whilst the lowest is the complex with the dithienylpyrimidine. The trends in both the absorption and emission energies as a function of ligand substituent have been rationalised accurately with the aid of TD-DFT calculations. The lowest-excited singlet and triplet levels correlate with the trend in the HOMO–LUMO gap. All the complexes have quantum yields that are
已经制备了八种双核铱(III)配合物的新家族,其特征在于4,6-二芳基嘧啶L y为双-N-C-配位桥联配体。金属离子还通过基于1,3-二(2-吡啶基)苯的末端N,C,N-环金属化配体L X,以及通过单齿氯化物或氰化物来配位。化合物的通式为Ir L X Z } 2 L y(Z= Cl或CN)。该家族包括具有三个不同的L X配体和五个不同的二芳基嘧啶L y的实例,其中四个是二苯基嘧啶,一个是二噻吩基嘧啶。必需的配体已经通过标准的交叉偶联方法合成。配合物的合成涉及两个步骤,其中L X H与IrCl 3 ·3H 2 O反应形成[Ir L X Cl(μ-Cl)] 2形式的双核配合物,然后用二芳基嘧啶L y H 2。至关重要的是,每个复合物仅以单一化合物形式形成:强反式金属化环的影响决定了配体的相对位置,而对称取代的三齿配体的使用消除了当双双齿单元通过桥连的配体连接时获得的Λ和Δ对映体的可能性。该族
A compound of formula (I): wherein R1 in each occurrence is independently H or a substituent; R2 in each occurrence is independently a substituent; p in each occurrence is 0, 1, 2, 3 or 4 and Y is a ligand, with the proviso that at least one R1 is a substituent or at least one p is at least 1.