which are among the highest values of quantum yield ever reported for organometallic Pd complexes with bidentate ligands. This means that the introduction of the Pd in the oxazolone scaffold produces in some cases an amplification of the fluorescence of several orders of magnitude from the free ligand 1 to complexes 3–6. Systematic variations of the substituents of the oxazolones and the ancillary ligands
弱荧光 ( Z )-4-亚芳基-5-(4 H )-
恶唑酮 ( 1 ),Φ PL < 0.1%,含有各种共轭芳香片段和/或带电亚芳基部分,已通过与 Pd 反应进行正钯化( OAc) 2 . 所得双核配合物( 2 )具有作为C^N-螯合物键合的恶唑酮配体,限制涉及恶唑酮的分子内运动。由2可知,多种单核衍生物,如[Pd(C^N-恶唑酮)(O 2 CCF 3 )(py)] ( 3 )、[Pd(C^N-恶唑酮)(py) 2 ](ClO 4)(4)、[Pd(C^N-恶唑酮)(Cl)(py)] ( 5 ) 和 [Pd(C^N-恶唑酮)(X)(NHC)] ( 6 , 7 ) 已制备并充分特点。大多数配合物3 – 6在溶液中在从绿色到黄色的波长范围内发出强荧光,Φ PL值高达 28% ( 4h ),这是迄今为止报道的有机金属 Pd 配合物量子产率的最高值之一。双齿配体。这意味着在某些情况下,在
恶唑酮支架中引入