Crystal structures, red-shifted luminescence and iodide-anion recognition properties of four novel D–A type Zn(II) complexes,Dalton Transactions

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Crystal structures, red-shifted luminescence and iodide-anion recognition properties of four novel D–A type Zn(II) complexes
Dalton Transactions ( IF 3.5 ) Pub Date : 2020/02/25 , DOI: 10.1039/c9dt04840e
Jian-Biao Song _{1,

2,

3,

4,

5} , Pengfei Wang _{1,

2,

3,

4,

5} , Li Yan _{3,

4,

5,

6} , Liang Hao _{1,

2,

3,

4,

5} , Maroof Ahmad Khan _{1,

2,

3,

4,

5} , Gui-lei Liu _{5,

7,

8} , Hui Li _{1,

2,

3,

4,

5}

Affiliation

Four D–A type Zn(II) coordination complexes, [Zn(C₂₉H₂₉N₃O₂)·(CH₃OH)]·(CH₃OH) (1), Zn₂(C₇₄H₉₀N₆O₄)·(CH₃OH) (2), [Zn(C₃₀H₂₈N₄O₂)·(CH₃OH)]·(CH₃OH) (3) and [Zn(C₃₈H₄₄N₄O₂)·(C₂H₅OH)]·(C₂H₅OH) (4), were designed, synthesized, and studied. Their fluorescence properties in the solid state and in THF solution were comprehensively analysed based on their single-crystal structures. The results showed that the red-shift of fluorescence emission from complexes 1 to 4 was successfully achieved via the strategy of enhancing intramolecular charge transfer (ICT) effects by increasing the number of electron-pulling and pushing groups gradually. Meanwhile, because of the fluorescence recognition abilities of these four complexes towards iodide anions in THF, they could be regarded as potential fluorescent sensors for I⁻ in this organic solution in the future.

中文翻译：

四种新型D–A型Zn（II）配合物的晶体结构，红移发光和碘阴离子识别特性

四种D–A型Zn（II）配位化合物，[Zn（C ₂₉ H ₂₉ N ₃ O ₂）·（CH ₃ OH）]·（CH ₃ OH）（1），Zn ₂（C ₇₄ H ₉₀ N ₆ O ₄）·（CH ₃ OH）（2），[Zn（C ₃₀ H ₂₈ N ₄ O ₂）·（CH ₃ OH）]·（CH ₃ OH）（3）和[Zn（C ₃₈ H ₄₄ N ₄ O ₂）·（C₂ H₅ OH）]·（C₂ H₅ OH）（ 4）被设计，合成和研究。基于它们的单晶结构，全面分析了它们在固态和THF溶液中的荧光性质。结果表明，从复合物的荧光发射的红移1至4中成功地实现了通过提高分子内电荷转移（ICT）通过增加的电子推拉组逐渐数影响的策略。同时，由于这四种络合物对THF中碘离子的荧光识别能力，它们可以被认为是潜在的I⁻将来在这种有机解决方案中。

更新日期：2020-04-08

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