was synthesized and subsequently deprotonated with alkali metal precursors to yield dimeric complexes [M2(R)-PEPIA}2] (M = Li (2), Na (3), K (4), Rb (5)). The cesium compound [M(R)-PEPIA}] (6) crystallized as a cocrystal composed of dimeric ([Cs2(R)-PEPIA}2] (6d) and 1D-polymeric ([Cs(R)-PEPIA}]n) (6p) species in a 1 : 1 ratio. The coordination polymer 6p features a unique sinus-shaped configuration
合成对映体纯的
配体P,P
-二苯基-N,N'-双((R)-1-苯基乙基)膦亚酰胺(1 ;(R)-HPE
PIA),随后用碱
金属前体去质子化,生成二聚体复合物[ M 2 (R-PE
PIA} 2 ](M = Li(2),Na(3),K(4),Rb(5))。
铯化合物[M (R-PE
PIA}](6)结晶为共聚晶体,由二聚体([Cs 2 (R)-PE
PIA} 2 ](6 d)和1D聚合物([Cs (R )-PE
PIA}]n)(6 p)物种,比例为1:1。配位聚合物6 p具有重复的–Cs–N–P–N–Cs–N–P–N–单元的独特的正弦形状。发现固体1–6具有不寻常的光致发光(PL)特性:与荧光
配体1相比,碱
金属配合物在低温(<100 K)下显示
磷光,而热激活延迟荧光(TADF)在〜150 K以上。后者在环境温度下可提供高达36%(3)的PL量子产率。DFT计算支持1和2-6 d具有类似的单重态和三