First TPymT-Ln complexes (TPymT = 2,4,6-Tris(2-pyrimidyl)-1,3,5-triazine; Ln = Eu, Gd, Tb, Dy): Solvothermal synthesis, structure, magnetic and photoluminescent properties

IF 3.4 3区 化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR Solid State Sciences Pub Date : 2024-10-16 DOI:10.1016/j.solidstatesciences.2024.107723
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Abstract

Four novel mononuclear lanthanide complexes, [Ln(TPymT)(NO3)3(H2O)2] (Ln: Eu3+ (1), Gd3+ (2), Tb3+ (3) and Dy3+ (4)), have been solvothermally synthesized using multidentate 2,4,6-tris(2-pyrimidyl)-1,3,5-triazine (TPymT). Compounds 13 have been characterized by means of elemental analysis, FT-IR, and single-crystal/powder X-ray diffraction analysis. Compound 4 was structurally characterized. The Ln3+ ion in 14 is ten-coordinated, where TPymT serves as an N3 donor in an isostructural series. The alternating-current magnetic studies showed frequency dependence below ca. 10 K for 3, as an indication of a single-ion magnet. The activation energy for the magnetization reorientation was estimated as Ueff/kB = 95(9) K after applying a dc bias field 2000 Oe for 3. The photoluminescent studies clarified that 1 and 3 behaved as red and green light emitters with quantum yields as high as 17 and 39 %, respectively. The TD-DFT calculation supports the energy level scheme of ground and excited states of TPymT together with the reference compound 4′-phenyl-2,2’:6′,2″-terpyridine. The present work suggests a broad chance and motivation to apply TPymT to the field of 4f coordination chemistry.

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首个 TPymT-Ln 复合物(TPymT = 2,4,6-三(2-嘧啶基)-1,3,5-三嗪;Ln = Eu、Gd、Tb、Dy):溶热合成、结构、磁性和光致发光特性
四种新型单核镧系配合物[Ln(TPymT)(NO3)3(H2O)2](Ln:利用多叉 2,4,6-三(2-嘧啶基)-1,3,5-三嗪(TPymT)溶热合成了四种新型单核镧系配合物 [Ln(TPymT)(NO3)3(H2O)2](Ln:Eu3+ (1)、Gd3+ (2)、Tb3+ (3) 和 Dy3+ (4))。化合物 1-3 已通过元素分析、傅立叶变换红外光谱和单晶/粉末 X 射线衍射分析进行了表征。对化合物 4 进行了结构表征。1-4 中的 Ln3+ 离子是十配位的,其中 TPymT 在等结构系列中充当 N3 给体。交变电流磁性研究显示,3 的频率依赖性低于约 10 K,这表明它是一种单离子磁体。对 3 施加直流偏置场 2000 Oe 后,磁化重新定向的活化能估计为 Ueff/kB = 95(9) K。光致发光研究表明,1 和 3 表现为红色和绿色发光体,量子产率分别高达 17% 和 39%。TD-DFT 计算支持 TPymT 与参考化合物 4′-苯基-2,2':6′,2″-三吡啶的基态和激发态能级方案。本研究为将 TPymT 应用于 4f 配位化学领域提供了广阔的机会和动力。
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来源期刊
Solid State Sciences
Solid State Sciences 化学-无机化学与核化学
CiteScore
6.60
自引率
2.90%
发文量
214
审稿时长
27 days
期刊介绍: Solid State Sciences is the journal for researchers from the broad solid state chemistry and physics community. It publishes key articles on all aspects of solid state synthesis, structure-property relationships, theory and functionalities, in relation with experiments. Key topics for stand-alone papers and special issues: -Novel ways of synthesis, inorganic functional materials, including porous and glassy materials, hybrid organic-inorganic compounds and nanomaterials -Physical properties, emphasizing but not limited to the electrical, magnetical and optical features -Materials related to information technology and energy and environmental sciences. The journal publishes feature articles from experts in the field upon invitation. Solid State Sciences - your gateway to energy-related materials.
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