来自光学惰性的铕和铽三（β-二酮）的镜像磁圆偏振发光（MCPL）。
Mirror-image magnetic circularly polarized luminescence (MCPL) from optically inactive Eu and Tbtris(β-diketonate).
作者信息
Yoshikawa Hiroki, Nakajima Gaku, Mimura Yuki, Kimoto Takahiro, Kondo Yoshiro, Suzuki Satoko, Fujiki Michiya, Imai Yoshitane
机构信息
Department of Applied Chemistry, Faculty of Science and Engineering, Kindai University, 3-4-1 Kowakae, Higashi-Osaka, Osaka 577-8502, Japan.
JASCO Corporation, 2967-5 Ishikawa, Hachioji, Tokyo 192-8537, Japan.
出版信息
Dalton Trans. 2020 Jul 21;49(28):9588-9594. doi: 10.1039/d0dt01464h.
Five optically inactive EuIII(hfa)3, TbIII(hfa)3, EuIII(acac)3·Phen, TbIII(acac)3·Phen and EuIII(hfa)3·BDPB (hfa: hexafluoroacetylacetonate, acac: acetylacetonate, BDPB: 2,2'-bis(diphenylphosphino)biphenyl and Phen: phenanthroline) complexes showed clear mirror-image magnetic circularly polarised luminescence (MCPL) spectra in CHCl3, acetone, and DMF solutions, in a poly(methyl methacrylate) film, a KBr pellet and bulk powder at room temperature under 1.6 T as an external magnetic field with Faraday geometry. The signs of the MCPL signals were determined via N-up and S-up geometries. The gMCPL values of EuIII(hfa)3 and TbIII(hfa)3 were ±(0.046-2.0) × 10-2 T-1 at the 5D0 → 5FJ transitions (J = 1-4) in the range of 590 nm and 703 nm and ±(0.0081-1.0) × 10-2 T-1 at the 5D4 → 7FJ transitions (J = 3-6) in the range of 480 nm and 630 nm, respectively. Interestingly, the photoluminescence spectra of EuIII(hfa)3 and TbIII(hfa)3 in CHCl3 and acetone under 1.6 T considerably redshifted by 10-114 cm-1, while those of EuIII(acac)3·Phen and TbIII(acac)3·Phen did not reveal detectable redshifts.
五种光学非活性的铕（III）六氟乙酰丙酮配合物、铽（III）六氟乙酰丙酮配合物、铕（III）乙酰丙酮配合物·邻菲罗啉、铽（III）乙酰丙酮配合物·邻菲罗啉和铕（III）六氟乙酰丙酮配合物·2,2'-双（二苯基膦基）联苯（hfa：六氟乙酰丙酮，acac：乙酰丙酮，BDPB：2,2'-双（二苯基膦基）联苯，Phen：邻菲罗啉）配合物在三氯甲烷、丙酮和N,N-二甲基甲酰胺溶液中，以及在聚甲基丙烯酸甲酯薄膜、溴化钾压片和室温下1.6 T外磁场（法拉第几何构型）中的块状粉末中，均呈现出清晰的镜像磁圆偏振发光（MCPL）光谱。MCPL信号的符号通过N向上和S向上几何构型确定。铕（III）六氟乙酰丙酮配合物和铽（III）六氟乙酰丙酮配合物在590 nm至703 nm范围内的5D0→5FJ跃迁（J = 1 - 4）处的gMCPL值为±(0.046 - 2.0)×10-2 T-1，在480 nm至630 nm范围内的5D4→7FJ跃迁（J = 3 - 6）处的gMCPL值分别为±(0.0081 - 1.0)×10-2 T-1。有趣的是，在1.6 T下，铕（III）六氟乙酰丙酮配合物和铽（III）六氟乙酰丙酮配合物在三氯甲烷和丙酮中的光致发光光谱显著红移了10 - 114 cm-1，而铕（III）乙酰丙酮配合物·邻菲罗啉和铽（III）乙酰丙酮配合物·邻菲罗啉的光致发光光谱未显示出可检测到的红移。
Zotero 插件