Molecular Engineering of Platinum(II) Terpyridine Complexes with Tetraphenylethylene-Modified Alkynyl Ligands: Supramolecular Assembly via Pt···Pt and/or π–π Stacking Interactions and the Formation of Various Superstructures,ACS Applied Materials & Interfaces

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Molecular Engineering of Platinum(II) Terpyridine Complexes with Tetraphenylethylene-Modified Alkynyl Ligands: Supramolecular Assembly via Pt···Pt and/or π–π Stacking Interactions and the Formation of Various Superstructures
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2017-10-09 00:00:00 , DOI: 10.1021/acsami.7b11807
Heung-Kiu Cheng ₁ , Margaret Ching-Lam Yeung ₁ , Vivian Wing-Wah Yam ₁

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A series of platinum(II) terpyridine complexes with tetraphenylethylene-modified alkynyl ligands has been designed and synthesized. The introduction of the tetraphenylethylene motif has led to aggregation-induced emission (AIE) properties, which upon self-assembly led to the formation of metal–metal-to-ligand charge transfer (MMLCT) behavior stabilized by Pt···Pt and/or π–π interactions. Tuning the steric bulk or hydrophilicity through molecular engineering of the platinum(II) complexes has been found to alter their spectroscopic properties and result in interesting superstructures (including nanorods, nanospheres, nanowires, and nanoleaves) in the self-assembly process. The eye-catching color and emission changes upon varying the solvent compositions may have potential applications in chemosensing materials for the detection of microenvironment changes. Furthermore, the importance of the directional Pt···Pt and/or π–π interactions on the construction of distinctive superstructures has also been examined by UV–vis absorption and emission spectroscopy and transmission electron microscopy. This work represents the interplay of both inter- and intramolecular interactions as well as the energies of the two different chromophoric/luminophoric systems that may open up a new route for the development of platinum(II)–AIE hybrids as functional materials.

中文翻译：

四苯基乙烯修饰的炔基配体的铂（II）吡啶吡啶配合物的分子工程：通过Pt···Pt和/或π–π堆积相互作用的超分子组装以及各种超结构的形成

已经设计并合成了一系列具有四苯基乙烯修饰的炔基配体的铂（II）吡啶吡啶配合物。四苯基乙烯基序的引入导致了聚集诱导发射（AIE）特性，该特性在自组装后导致形成了由Pt···Pt和/或Pt稳定的金属-金属-配体电荷转移（MMLCT）行为。或π–π相互作用。已发现通过铂（II）配合物的分子工程调节空间体积或亲水性会改变其光谱性质，并在自组装过程中产生有趣的超结构（包括纳米棒，纳米球，纳米线和纳米叶）。改变溶剂成分后，醒目的颜色和发射变化可能在化学传感材料中具有潜在的应用，可用于检测微环境的变化。此外，还通过紫外可见吸收和发射光谱以及透射电子显微镜检查了方向性Pt···Pt和/或π–π相互作用对独特的上部结构的重要性。这项工作代表了分子间和分子内相互作用的相互作用，以及两种不同发色/发光体系的能量，这可能为开发功能性铂（II）-AIE杂化物开辟一条新途径。紫外可见吸收和发射光谱以及透射电子显微镜也检验了方向性Pt···Pt和/或π–π相互作用对独特的上层建筑构造的重要性。这项工作代表了分子间和分子内相互作用的相互作用，以及两种不同发色/发光体系的能量，这可能为开发功能性铂（II）-AIE杂化物开辟一条新途径。紫外可见吸收和发射光谱以及透射电子显微镜也检验了方向性Pt···Pt和/或π–π相互作用对独特的上层建筑构造的重要性。这项工作代表了分子间和分子内相互作用的相互作用，以及两种不同发色/发光体系的能量，这可能为开发功能性铂（II）-AIE杂化物开辟一条新途径。

更新日期：2017-10-09

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