含2-(2′,4′-二氟苯基)-5-硝基吡啶的铱髥配合物的合成、晶体结构与发光性质(英文)  

Syntheses, Crystal Structures and Photoluminescence Properties of Iridium(Ⅲ) Complexes Containing 2-(2′,4′-Difluorophenyl)-5-nitropyridine

作　　者：邱钊[1] 沈旋[1] 杨婷[1] 陈祝情 许家鑫 王欣[1] 朱敦如[1] 

机构地区：[1]南京工业大学化学化工学院、材料化学工程国家重点实验室,南京210009

出　　处：《无机化学学报》2014年第11期2653-2661,共9页Chinese Journal of Inorganic Chemistry

基　　金：国家自然科学基金(No.21171093、21476115)资助项目

摘　　要：以2-氯-5-硝基吡啶和2,4-二氟苯基硼酸为原料通过铃木偶联反应,合成出2-(2′,4′-二氟苯基)-5-硝基吡啶(HdFNppy)并对其进行了表征。以此化合物为主配体,合成了含二齿及单齿辅配体的铱(Ⅲ)配合物[Ir(dFNppy)2(pic)](1,pic=吡啶甲酸根)和[Ir(dFNppy)2(PPh3)Cl](2,PPh3=三苯基膦)。通过X射线单晶衍射确定了1和2的结构,1的晶体属于单斜晶系,空间群为I2/a;2的晶体属于三斜晶系,P1空间群。液体光致发光谱(PL)表明,1和2在CH2Cl2中的最大发射波长为634和616nm,显红光和橙红光;固体PL谱显示1和2的最大发射波长为638和594nm。通过循环伏安法估算得到的1和2的HOMO-LUMO能级差与紫外-可见光谱推算出的结果相似。1和2还具有较好的热稳定性。By using 2-chloro-5-nitropyridine and 2,4-difluorophenylboric acid as starting reagents, 2-（2′,4′-Difluorophenyl）-5-nitropyridine（Hd FNppy） has been synthesized through Suzuki coupling reaction and unambiguously characterized. Two iridium （Ⅲ） complexes [Ir（d FNppy）2（pic）]（1, pic =picolinate） and [Ir（d FNppy）2（PPh3）Cl]（2, PPh3=triphenylphosphine） containing d FNppy main ligand and bi-, mono-dentate ancillary ligands have been prepared and their crystal structures have also been determined by X-ray analysis. 1 crystallizes in monoclinic with space group of I2/a and 2 in triclinic with space group of P1. The photoluminescence（PL）spectra of 1 and 2 in CH2Cl2 solutions show the emission maxima at 634 and 616 nm, corresponding to red and orange red light-emitting. The emission maxima of 1 and 2 in solid state PL spectra are 638 and 594 nm,respectively. The HOMO-LUMO electronic energy gaps of 1 and 2 estimated from the CV measurements are comparable to those calculated from the UV-Vis spectra of 1 and 2. 1 and 2 have remarkable thermal stabilities.CCDC： 938997, 1; 872239, 2.

关 键 词：2-(2′ 4′-二氟苯基)-5-硝基吡啶 铱(Ⅲ)配合物 晶体结构 发光性质 

分 类 号：O614.825[理学—无机化学]