Luminescent mechanism analyzing and metal-ion sensing of Eu(III)-organic ligands complex doped gelatin-based films and hydrogels

IF 3.9 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY Materials Science and Engineering B-advanced Functional Solid-state Materials Pub Date : 2023-04-01 DOI:10.1016/j.mseb.2023.116339

Fangqi Ji , Wei Zhou , Ze Zhang , Yanchuan Guo , Bing Zhang

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引用次数: 3

Abstract

A series of gelatin-based composite films (gf) were prepared by doping Eu(TTA)₃(H₂O)₂, Eu(TTA)₃bipy, or Eu(TTA)₃phen respectively into type-E or -B gelatin film substrate. All of B-gf and the E-gf doped Eu(TTA)₃phen were realized with red luminescence under 365 nm excitation, while only slight blue luminescence originated from gelatin substrate can be observed in E-gf doped Eu(TTA)₃(H₂O)₂ or Eu(TTA)₃bipy. A UV-absorption competition between substrate and dopant was confirmed to decide the luminescent properties of gf. Weaker UV absorption of B-gelatin ensures that Eu(TTA)₃, regardless of ancillary ligand, can obtain sufficient excitation energy for luminescence emission. While only Eu(TTA)₃phen possesses a strong enough ability to absorb UV against E-gelatin. Based on the optimal matching principle of substrate and dopant, luminescent gelatin-based hydrogel (gh) doped Eu(TTA)₃phen was prepared. A ‘dual effect’ mechanism was proposed for explaining metal-ion sensing applications. Among various metal ions, furthermore, both B and E types of Eu(TTA)₃phen@gh exhibited similar significant luminescence quenching for Fe³⁺ with a detection limit of about 1.15 μmol/L.

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Eu（III）-有机配体复合掺杂明胶基薄膜和水凝胶的发光机理分析及金属离子传感

通过将Eu（TTA）3（H2O）2、Eu（TTP）3bipy或Eu（TT）3phen分别掺杂到E型或B型明胶膜基体中，制备了一系列明胶基复合膜（gf）。在365nm的激发下，所有的B-gf和掺有E-gf的Eu（TTA）3phen都是用红色发光实现的，而掺有E-gf的Eu 3（H2O）2或Eu（TTP）3bipy只能观察到来自明胶基质的轻微蓝色发光。基质和掺杂剂之间的紫外线吸收竞争决定了gf的发光性能。B-明胶较弱的紫外线吸收确保了Eu（TTA）3，无论辅助配体如何，都能获得足够的发光激发能。而只有Eu（TTA）3phen对E-胶凝具有足够强的紫外线吸收能力。基于基质和掺杂剂的最佳匹配原理，制备了掺Eu（TTA）3phen的明胶基发光水凝胶。提出了一种解释金属离子传感应用的“双重效应”机制。此外，在各种金属离子中，B型和E型的Eu（TTA）3phen@gh对Fe3+表现出类似的显著发光猝灭，检测限约为1.15μmol/L。

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来源期刊

Materials Science and Engineering B-advanced Functional Solid-state Materials 工程技术-材料科学：综合

CiteScore

5.60

自引率

2.80%

发文量

481

审稿时长

3.5 months

期刊介绍： The journal provides an international medium for the publication of theoretical and experimental studies and reviews related to the electronic, electrochemical, ionic, magnetic, optical, and biosensing properties of solid state materials in bulk, thin film and particulate forms. Papers dealing with synthesis, processing, characterization, structure, physical properties and computational aspects of nano-crystalline, crystalline, amorphous and glassy forms of ceramics, semiconductors, layered insertion compounds, low-dimensional compounds and systems, fast-ion conductors, polymers and dielectrics are viewed as suitable for publication. Articles focused on nano-structured aspects of these advanced solid-state materials will also be considered suitable.