申请人:Yersin Hartmut
公开号:US20130150581A1
公开(公告)日:2013-06-13
The invention relates to neutral mononuclear copper (I) complexes for emitting light and with a structure according to formula (A) in which: M represents: Cu(I); L∩L represents: a single, negatively charged, bidentate ligand; N∩N represents: a diimine ligand (substituted with R and FG), in particular a substituted 2,2′-bipyridine derivative (bpy) or a substituted 1,10-phenanthroline derivative (phen); R represents: at least one sterically demanding substituent for preventing the planarisation of the complex in the excited state; FG=functional group, and represents: at least one second substituent for increasing solubility in organic solvents. The substituent can also be used for electron transport or alternatively for hole transport, said functional group being bound to the diimine ligands either directly or by means of suitable bridges; and the copper (I) complex: having a ΔE(S
1
−T
1
) value of less than 2500 cm
−1
between the lowest excited singlet state (S
1
) and the triplet state (T
1
) which lies below; having an emission lifespan of at most 20 μs; having an emission quantum yield of greater than 40%, and a solubility of at least 1 g/L in organic solvents, in particular polar organic hydrocarbons such as acetone, methyl ethyl ketone, benzene, toluene, chlorobenzene, dichlorobenzene, dichloromethane, chloroform, dichloroethane, tetrachloroethylene, alcohols, acetonitrile or water.
本发明涉及一种中性的单核铜(I)配合物,用于发光,其结构符合公式(A),其中:M表示:Cu(I);L∩L表示:一种单负离子的双齿配体;N∩N表示:一种二亚胺配体(用R和FG取代),特别是取代的2,2′-联吡啶衍生物(bpy)或取代的1,10-邻菲啰啉衍生物(phen);R表示:至少一个空间位阻取代基,以防止激发态下配合物的平面化;FG表示:功能基团,代表至少一个第二取代基,以增加在有机溶剂中的溶解度。该取代基还可用于电子输运或孔传输,该功能基团直接或通过适当的桥连接到二亚胺配体上;铜(I)配合物:具有最低激发单重态(S1)和三重态(T1)之间的ΔE(S1−T1)值小于2500 cm−1;具有最多20 μs的发射寿命;具有大于40%的发射量子产率,并且在有机溶剂中的溶解度至少为1 g/L,特别是在极性有机烃中,如丙酮、甲基乙酮、苯、甲苯、氯苯、二氯苯、二氯甲烷、氯仿、二氯乙烷、四氯乙烯、醇、乙腈或水中。