Synthesis and photoluminescent studies of orange–red emissive samarium(III) complexes with 1,1,1-trifluoro-5,5-dimethyl-2,4-hexanedione and 2,2′-bipyridine and its distinctive analogous

IF 2.7 3区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR Inorganica Chimica Acta Pub Date : 2024-08-08 DOI:10.1016/j.ica.2024.122306

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Abstract

Highly luminescent octa-coordinated samarium(III) complexes including [Sm(TFDH)₃(Bpy)] (Sm1), [Sm(TFDH)₃(S₁)] (Sm2), [Sm(TFDH)₃(S₂)] (Sm3) and [Sm(TFDH)₃(S₃)] (Sm4) were synthesized utilizing fluorinated β-diketone i.e. 1,1,1-trifluoro-5,5-dimethyl-2,4-hexanedione (TFDH) and bidentate auxiliary ligands. Here, S₁ is 5,5ʹ-dibromo-2,2′-bipyridine; S₂ is 5-bromo-5ʹ-(3,4-(ethylenedioxy)thien-2-yl)2,2′-bipyridine and S₃ is 5,5′-bis(3,4-(ethylenedioxy)thien-2-yl)2,2′-bipyridine. Different properties of prepared complexes were examined using numerous characterization techniques such as elemental, FT-IR, ¹H NMR, absorption and thermogravimetric analyses. Nuclear magnetic resonance (NMR) data affirms the coordination of three TFDH units and one bidentate ligand with metal ion in each complex. Sm(III) complexes exhibit thermal stability up to 250 °C when subjected to an inert atmosphere composed of nitrogen (N₂) gas. The luminescent characteristics of the powdered Sm1-Sm4 complexes were also investigated. Each complex displays distinct peaks at around 564, 605, 648 and 707 nm in their emission profiles. The orange-red emission of these complexes was observed via colorimetry which strongly aligns with the highly intense peak observed at 648 nm (⁴G_5/2→⁶H_9/2). The strong luminosity and color coordinates suggest that the complexes could serve as potential candidates for use in OLEDs and display panel.

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1,1,1-三氟-5,5-二甲基-2,4-己二酮和 2,2′-联吡啶及其独特类似物的橙红色发光钐（III）配合物的合成与光致发光研究

利用氟化 β-二酮（即 1,1,1-三氟-5,5-二甲基-2,4-己二酮（TFDH）和双叉辅助配体合成了高发光八配位钐（III）配合物，包括 [Sm(TFDH)3(Bpy)] (Sm1)、[Sm(TFDH)3(S1)] (Sm2)、[Sm(TFDH)3(S2)] (Sm3) 和 [Sm(TFDH)3(S3)] (Sm4)。即 1,1,1-三氟-5,5-二甲基-2,4-己二酮（TFDH）和双叉辅助配体合成了[Sm(TFDH)3(S3)]（Sm4）。其中，S1 是 5,5ʹ-二溴-2,2′-联吡啶；S2 是 5-溴-5ʹ-(3,4-(亚乙二氧基)噻吩-2-基)2,2′-联吡啶；S3 是 5,5′-双(3,4-(亚乙二氧基)噻吩-2-基)2,2′-联吡啶。利用元素分析、傅立叶变换红外光谱、1H NMR、吸收分析和热重分析等多种表征技术对所制备复合物的不同性质进行了研究。核磁共振（NMR）数据证实，每个配合物中都有三个 TFDH 单元和一个双叉配体与金属离子配位。Sm(III) 复合物在氮气（N2）组成的惰性气氛中表现出高达 250 °C 的热稳定性。此外，还研究了粉末状 Sm1-Sm4 复合物的发光特性。每种复合物的发射曲线都在 564、605、648 和 707 纳米波长处显示出明显的峰值。通过比色法观察到这些复合物的橙红色发射与在 648 纳米处观察到的高强度峰（4G5/2→6H9/2）高度一致。强烈的光度和颜色坐标表明，这些复合物可作为潜在的候选物质用于有机发光二极管和显示面板。

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来源期刊

Inorganica Chimica Acta 化学-无机化学与核化学

CiteScore

6.00

自引率

3.60%

发文量

440

审稿时长

35 days

期刊介绍： Inorganica Chimica Acta is an established international forum for all aspects of advanced Inorganic Chemistry. Original papers of high scientific level and interest are published in the form of Articles and Reviews. Topics covered include: • chemistry of the main group elements and the d- and f-block metals, including the synthesis, characterization and reactivity of coordination, organometallic, biomimetic, supramolecular coordination compounds, including associated computational studies; • synthesis, physico-chemical properties, applications of molecule-based nano-scaled clusters and nanomaterials designed using the principles of coordination chemistry, as well as coordination polymers (CPs), metal-organic frameworks (MOFs), metal-organic polyhedra (MPOs); • reaction mechanisms and physico-chemical investigations computational studies of metalloenzymes and their models; • applications of inorganic compounds, metallodrugs and molecule-based materials. Papers composed primarily of structural reports will typically not be considered for publication.