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Mechano-fluorochromic Pt-II Luminogen and Its Cysteine Recognition

机译:机械荧光色的Pt-II发光剂及其半胱氨酸识别

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摘要

A new triphenylamine-based organometallic Pt-II luminogen (1) and its analogous organic compound (2) are reported. The molecules are decorated with aldehyde functionality to improve their photophysical properties by utilising donor-acceptor interactions. The single crystal X-ray structure analysis of PtII analogue 1 revealed that the neighbouring molecules were loosely organised by weak intermolecular C-H center dot center dot center dot pi interactions. Because of the twisted nature of the triphenylamine backbone the compounds showed aggregation-induced emission enhancement in THF/water mixture. Due to their loose crystal packing, upon application of external stimuli these luminogens exhibited mechano-fluorochromic behaviour. The crystalline forms of the compounds displayed a more superior emission efficiency than the grinded samples. Moreover, the compounds showed crystallization-induced emission enhancement (CIEE) and exhibited chemodosimetric response towards cysteine under physiological condition.
机译:报道了一种新的基于三苯胺的有机金属Pt-II发光剂(1)及其类似的有机化合物(2)。通过利用供体-受体相互作用,用醛官能团修饰分子以改善其光物理性质。 PtII类似物1的单晶X射线结构分析表明,相邻的分子是通过弱分子间C-H中心点中心点中心点pi相互作用而松散地组织的。由于三苯胺主链的扭曲性质,这些化合物在THF /水混合物中显示出聚集诱导的发射增强。由于其松散的晶体堆积,在施加外部刺激后,这些发光剂表现出机械荧光色行为。化合物的结晶形式显示出比研磨样品更高的发射效率。此外,该化合物在生理条件下显示出结晶诱导的发射增强(CIEE),并且对半胱氨酸表现出化学计量响应。

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