Abstract 2-(1H-1,2,4-Triazol-3-yl)pyridine was investigated as suitable ligand for the preparation of new Y(III), Sm(III), Eu(III), Gd(III) and Tb(III) complexes. Elemental analysis, mass spectrometry, thermal analysis, FT-IR and P-XRD methods were used to investigate their structural configuration. All the prepared complexes are highly luminescent, having an impressive visual emission under UV excitation. Fluorescence spectroscopy revealed in case of Sm(III), Eu(III) and Tb(III) complexes intense metal centered specific narrow band emissions from the f–f transitions within 4f orbitals, while in case of Gd(III) and Y(III) complexes intense wide band emissions were recorded most probable due the heavy atom effect over the excited intraligand states. The excitation peaks are conveniently located in UV-A region for all prepared complexes apart from Sm(III) complex where the excitation peak is located within the violet region of the spectrum. The remarkable luminescent properties might recommend these complexes for applications in optical devices, as photonic conversion media.

中文翻译：

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新型Y（III），Sm（III），Eu（III），Gd（III）和Tb（III）与2-（1H-1,2,4-三唑-3-基）吡啶的配合物的光致发光特性

摘要研究了2-（1H-1,2,4-三唑-3-基）吡啶作为合适的配体，用于制备新的Y（III），Sm（III），Eu（III），Gd（III）和Tb （三）配合物。使用元素分析，质谱，热分析，FT-IR和P-XRD方法研究其结构。所有制备的配合物都是高发光的，在紫外线激发下具有令人印象深刻的视觉发射。荧光光谱显示，在Sm（III），Eu（III）和Tb（III）配合物的情况下，强金属以4f轨道内f-f跃迁为中心的特定窄带发射，而在Gd（III）和Y（III）情况下）络合物在激发的内配体态上由于重原子效应，很可能记录到很强的宽带发射。除Sm（III）配合物外，所有制备的配合物的激发峰均位于UV-A区域，在此Sm（III）配合物的激发峰位于光谱的紫色区域内。出色的发光性能可能建议将这些络合物用作光学设备中的光子转换介质。