Dua Nishita, Punia Monika, Doon Priti Boora
Department of Chemistry, Maharshi Dayanand University, Rohtak, 124001, India.
J Fluoresc. 2024 Aug 13. doi: 10.1007/s10895-024-03890-8.
The present paper reports synthesis of five Dy(III) complexes with bidentate ligand (3-benzylidene-2,4-pentanedione) and auxiliary ligands i.e. 2,2'-bipyridyl (bipy), 4,4'-dimethyl-2,2'-bipyridyl (dmbipy), neocuproine (neo) and 1,10-phenanthroline (phen). The structural and photometric parameters of the complexes were investigated through H NMR, energy dispersive X-ray analysis, Fourier transform infrared, photoluminescence and ultra-violet visible spectroscopy. The optical energy gap values validated their role in semiconducting devices. These complexes exhibit suitable thermal stability revealing their utility in fabrication of white OLEDs. The emission profile of Dy(III) complexes displayed peaks at 575 nm (yellow emission) and 484 nm (blue emission) accredited to F→H transitions of dysprosium ion. The decay curve exhibit monoexponential behaviour suggesting the existence of one luminescent centre in dysprosium complexes. Moreover, their CCT and CIE coordinates value authenticate them as cool white light emitting complexes.
本文报道了五种镝（III）配合物的合成，这些配合物由双齿配体（3-亚苄基-2,4-戊二酮）和辅助配体即2,2'-联吡啶（bipy）、4,4'-二甲基-2,2'-联吡啶（dmbipy）、新铜试剂（neo）和1,10-菲咯啉（phen）组成。通过核磁共振氢谱、能量色散X射线分析、傅里叶变换红外光谱、光致发光光谱和紫外可见光谱对配合物的结构和光度学参数进行了研究。光学能隙值验证了它们在半导体器件中的作用。这些配合物表现出合适的热稳定性，表明它们在制造白色有机发光二极管方面的实用性。镝（III）配合物的发射光谱在575 nm（黄色发射）和484 nm（蓝色发射）处出现峰值，这归因于镝离子的F→H跃迁。衰减曲线呈现单指数行为，表明镝配合物中存在一个发光中心。此外，它们的色坐标温度（CCT）和国际照明委员会（CIE）坐标值证明它们是冷白色发光配合物。
