Phase transition triggered aggregation-induced emission in a photoluminescent uranyl–organic framework,Chemical Communications

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Phase transition triggered aggregation-induced emission in a photoluminescent uranyl–organic framework
Chemical Communications ( IF 4.3 ) Pub Date : 2017-12-19 00:00:00 , DOI: 10.1039/c7cc09594e
Xia Wang _{1,

2,

3,

4} , Yanlong Wang _{1,

2,

3,

4} , Xing Dai _{1,

2,

3,

4} , Mark A. Silver _{1,

2,

3,

4} , Wei Liu _{1,

2,

3,

4} , Yuxiang Li _{1,

2,

3,

4} , Zhuanling Bai _{1,

2,

3,

4} , Daxiang Gui _{1,

2,

3,

4} , Lanhua Chen _{1,

2,

3,

4} , Juan Diwu _{1,

2,

3,

4} , Ruhong Zhou _{5,

6,

7,

8,

9} , Zhifang Chai _{1,

2,

3,

4} , Shuao Wang _{1,

2,

3,

4}

Affiliation

When exposed to water, the two-dimensional uranyl–organic layered compound [(CH₃)₂NH₂][(UO₂)(BCPBA)]·2DMF·H₂O (H₃BCPBA = 3,5-bis (4′-carboxylphenoxy) benzoic acid) gradually undergoes a complete single-crystal-to-single-crystal phase transition to [(CH₃)₂NH₂][(UO₂)(BCPBA)]·3.4H₂O, resulting in an enhanced ligand–ligand interaction between the adjacent layers. This process gives rise to initial quenching of the uranyl photoluminescence followed by subsequent recovery of the photoluminescence with a much elevated intensity, as a unique case of aggregation-induced emission in an extended solid system, further confirmed by DFT analysis on bonding.

中文翻译：

相变在光致发光的铀酰-有机骨架中引发聚集诱导的发射

当暴露于水中时，二维的铀酰-有机层状化合物[（CH ₃）₂ NH ₂ ] [（UO ₂）（BCPBA）]·2DMF·H ₂ O（H ₃ BCPBA = 3,5-bis（4 '-羧基苯氧基）苯甲酸）逐渐经历一个完整的单晶至单晶相转变为[（CH ₃）₂ NH ₂ ] [（UO ₂）（BCPBA）]·3.4H ₂O，导致相邻层之间的配体-配体相互作用增强。该过程引起了铀酰光致发光的初始淬灭，随后以大大提高的强度恢复了光致发光，这是在扩展的固体系统中聚集诱导的发射的独特情况，通过结合的DFT分析进一步证实了这一点。

更新日期：2018-01-16

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