4,4'-取代-2,2'-联吡啶钠和铕穴状化合物的合成和性质（英文）

Synthesis and Properties of Sodium and Europium(Ⅲ) Cryptates Incorporating the 4,4'-Substituted-2,2'-bipyridine Units

报道了由芳香醛合成4,4',6,6'-取代-2,2'-联吡啶化合物的方法,合成了一系列钠穴状化合物以及两个铕穴状化合物[Eu?bpy·bpy·bpy]·2Cl·Br(bpy=6,6'-二亚甲基-2,2'-联吡啶-4,4'-二甲酯)(23)和[Eu?bpy^1·bpy^1·bpy^2]·2Cl·Br(bpy^1=6,6'-二亚甲基-2,2'-联吡啶-4,4'-二甲酸,bpy^2=6,6'-二亚甲基-2,2'-联吡啶-4,4'-二甲酰乙二胺)(24).目标化合物均经过~1H NMR、13C NMR和高分辨质谱(HRMS)表征.X射线单晶衍射(XRD)和HRMS鉴定了铕穴状化合物23的结构.对23的荧光光谱(PL)、荧光衰减曲线和绝对量子产率(η)的研究结果表明,23能够有效地被近紫外光激发,显示荧光寿命(τ)为0.32 ms,η为70%的亮红色荧光,表明23是一种在发光和照明显示之中有着潜在应用的荧光材料.

A general strategy for the syntheses of 4,4＇,6,6＇-substituted-2,2＇-bipyridines starting from aromatic aldehyde is de- scribed. A series of sodium cryptates and two europium cryptates [Eucbpy-bpy-bpy].2C1.Br （bpy= 6,6＇-dimethylene- 2,2＇-bipyridine-4,4＇-dimethylester） （23） and [Eucbpyl.bpyl,bpy2].2CloBr （bpyl= 6,6＇-dimethylene-2,2＇-bipyridine-4,4＇- dicarboxylic acid, bpy2----6,6＇-dimethylene-2,2＇-bipyridine-4,4＇-diformylethylenediamine） （24）, were synthesized from these compounds. Sodium cryptates have been confirmed by 1H NMR, 13C NMR and high resolution mass spectrum （HRMS）. The structure of europium cryptate 23 was confirmed by X-ray diffraction （XRD） and HRMS. The photoluminescence （PL） spec- tra, decay curve and the absolute quantum efficiency （r/） of 23 are presented. 23 can be efficiently excited by near-UV light and presents a bright red luminescence with the lifetime （） of 0.32 ms and the r/of 70%. It is suggested that 23 is expected to be a ootential efficient phosphor for lihting and display.