Crystal Structure and Photoluminescence of Two Terbium Compounds with Bromobenzoic Acid and Phenanthroline.

IF 2.6 4区化学 Q2 BIOCHEMICAL RESEARCH METHODS Journal of Fluorescence Pub Date : 2024-10-07 DOI:10.1007/s10895-024-03974-5

Jie Kang, Yan Zhang, Yali Wu, Zhiping Wang, Wenjuan Li, Qiang Li, Huan Li, Yueping Cao, Songhe Xu, Yangcui Ning, Xiangfeng Meng

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Abstract

Two novel Tb(III) ternary complexes, [Tb₂(Phen)₂(p-BrBA)₆] and [TbY(Phen)₂(p-BrBA)₆], have been synthesized with p-bromobenzoic acid(p-BrBA) as the primary ligand and 1,10-phenanthroline(Phen) as the secondary ligand. The structures of these complexes are characterized by elemental analysis, IR spectroscopy, UV-vis absorption spectroscopy, thermal analysis (TGA) and single-crystal X-ray diffraction. The crystal structures of the compounds are similar because of similar radii of Tb³⁺ ion and Y³⁺ ion. Both the homobimetallic single crystal and the heterobimetallic single crystal belong to the monoclinic system. The results show that both complexes have excellent luminescence properties, including luminescent intensity, luminescent lifetime and quantum yield. The two compounds have an excited state lifetime of milliseconds and the photoluminescence quantum efficiencies of the two terbium complexes can exceed 100% upon excitation to their 5d states in theory, which is attributed to luminescent lifetime and quantum cutting (QC). Furthermore, the luminescent properties of [TbY(Phen)₂(p-BrBA)₆] are actually superior to those of [Tb₂(Phen)₂(p-BrBA)₆].

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含有溴苯甲酸和菲罗啉的两种铽化合物的晶体结构和光致发光。

以对溴苯甲酸（p-BrBA）为一级配体，1,10-菲罗啉（Phen）为二级配体，合成了两种新型锑（III）三元配合物：[Tb2(Phen)2(p-BrBA)6]和[TbY(Phen)2(p-BrBA)6]。这些复合物的结构通过元素分析、红外光谱、紫外-可见吸收光谱、热分析（TGA）和单晶 X 射线衍射进行了表征。由于 Tb3+ 离子和 Y3+ 离子的半径相似，这些化合物的晶体结构也很相似。同双金属单晶和异双金属单晶都属于单斜体系。研究结果表明，这两种化合物都具有优异的发光特性，包括发光强度、发光寿命和量子产率。这两种化合物的激发态寿命为毫秒级，理论上两种铽配合物在激发到 5d 态时的光致发光量子效率可超过 100%，这归功于发光寿命和量子切割（QC）。此外，[TbY(Phen)2(p-BrBA)6] 的发光特性实际上优于 [Tb2(Phen)2(p-BrBA)6]。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Fluorescence 化学-分析化学

CiteScore

4.60

自引率

7.40%

发文量

203

审稿时长

5.4 months

期刊介绍： Journal of Fluorescence is an international forum for the publication of peer-reviewed original articles that advance the practice of this established spectroscopic technique. Topics covered include advances in theory/and or data analysis, studies of the photophysics of aromatic molecules, solvent, and environmental effects, development of stationary or time-resolved measurements, advances in fluorescence microscopy, imaging, photobleaching/recovery measurements, and/or phosphorescence for studies of cell biology, chemical biology and the advanced uses of fluorescence in flow cytometry/analysis, immunology, high throughput screening/drug discovery, DNA sequencing/arrays, genomics and proteomics. Typical applications might include studies of macromolecular dynamics and conformation, intracellular chemistry, and gene expression. The journal also publishes papers that describe the synthesis and characterization of new fluorophores, particularly those displaying unique sensitivities and/or optical properties. In addition to original articles, the Journal also publishes reviews, rapid communications, short communications, letters to the editor, topical news articles, and technical and design notes.