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Phosphorescent Soft Salt Based on Platinum(II) Complexes: Photophysics, Self-Assembly, Thermochromism, and Anti-counterfeiting Application
Inorganic Chemistry ( IF 4.3 ) Pub Date : 2021-04-25 , DOI: 10.1021/acs.inorgchem.1c00826 Yun Ma 1, 2 , Kexin Chen 1 , Jinyu Lu 1 , Jiandong Shen 1 , Chenxi Ma 1 , Shujuan Liu 1 , Qiang Zhao 1 , Wai-Yeung Wong 2, 3
Inorganic Chemistry ( IF 4.3 ) Pub Date : 2021-04-25 , DOI: 10.1021/acs.inorgchem.1c00826 Yun Ma 1, 2 , Kexin Chen 1 , Jinyu Lu 1 , Jiandong Shen 1 , Chenxi Ma 1 , Shujuan Liu 1 , Qiang Zhao 1 , Wai-Yeung Wong 2, 3
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A new platinum(II) complex-based soft salt S1, ([Pt(tpp)(ed)]+[Pt(pba) (CN)2]−) (tpp = 2-(4-(trifluoromethyl)phenyl)pyridine, ed = ethane-1,2-diamine, pba = 4-(2-pyridyl)benzaldehyde), was designed and synthesized. UV–visible absorption and photoluminescence (PL) spectra were studied to elucidate the nature of ground and excited states. The soft salt complex was found to show self-assembly properties with the assistance of electrostatic, π–π stacking, and Pt···Pt interactions, resulting in the remarkable emergence of low-energy absorption and PL bands. Morphological transformation of S1 from undefined nanosized aggregates to nanofibers with different solvent compositions has been demonstrated. Interestingly, a luminescent polymer film was prepared by doping S1 into a polyethylene glycol matrix. The film displayed distinctive emission color change from yellow to red upon heating. Eventually, a high-level anti-counterfeiting application was accomplished using a time-resolved imaging technique based on the thermochromic luminescence property and long emission decay time displayed by S1. It is anticipated that this work can provide deep insights into the control of intermolecular interactions between cationic and anionic complexes of soft salt upon exposure to different external stimuli, resulting in the development of smart luminescent materials for various applications.
中文翻译：
基于铂（II）配合物的磷光软盐：光物理，自组装，热致变色和防伪应用
一种新的基于铂（II）配合物的软盐S1，（[ [Pt（tpp）（ed）] + [Pt（pba）（CN）2 ] -）（tpp = 2-（4-（三氟甲基）苯基）吡啶设计并合成了ed =乙烷-1,2-二胺，pba = 4-（2-吡啶基）苯甲醛）。研究了紫外可见吸收和光致发光（PL）光谱，以阐明基态和激发态的性质。发现软盐配合物在静电，π–π堆积和Pt···Pt相互作用的辅助下显示出自组装特性，从而导致了低能量吸收和PL谱带的显着出现。S1的形态转化已经证明了从不确定的纳米聚集体到具有不同溶剂组成的纳米纤维。有趣的是，通过将S1掺杂到聚乙二醇基质中来制备发光聚合物膜。加热后，该膜显示出独特的发射颜色，从黄色变为红色。最终，基于S1显示的热致变色发光特性和长发射衰减时间，使用时间分辨成像技术完成了高级防伪应用。可以预期，这项工作可以为控制软盐在不同外部刺激下的阳离子和阴离子配合物之间的分子间相互作用提供深刻的见解，从而开发出了适用于各种应用的智能发光材料。
更新日期：2021-05-17
中文翻译：
基于铂（II）配合物的磷光软盐：光物理，自组装，热致变色和防伪应用
一种新的基于铂（II）配合物的软盐S1，（[ [Pt（tpp）（ed）] + [Pt（pba）（CN）2 ] -）（tpp = 2-（4-（三氟甲基）苯基）吡啶设计并合成了ed =乙烷-1,2-二胺，pba = 4-（2-吡啶基）苯甲醛）。研究了紫外可见吸收和光致发光（PL）光谱，以阐明基态和激发态的性质。发现软盐配合物在静电，π–π堆积和Pt···Pt相互作用的辅助下显示出自组装特性，从而导致了低能量吸收和PL谱带的显着出现。S1的形态转化已经证明了从不确定的纳米聚集体到具有不同溶剂组成的纳米纤维。有趣的是，通过将S1掺杂到聚乙二醇基质中来制备发光聚合物膜。加热后，该膜显示出独特的发射颜色，从黄色变为红色。最终，基于S1显示的热致变色发光特性和长发射衰减时间，使用时间分辨成像技术完成了高级防伪应用。可以预期，这项工作可以为控制软盐在不同外部刺激下的阳离子和阴离子配合物之间的分子间相互作用提供深刻的见解，从而开发出了适用于各种应用的智能发光材料。
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