Zhang Mingming, Saha Manik Lal, Wang Ming, Zhou Zhixuan, Song Bo, Lu Chenjie, Yan Xuzhou, Li Xiaopeng, Huang Feihe, Yin Shouchun, Stang Peter J
Department of Chemistry, University of Utah , 315 South 1400 East, Room 2020, Salt Lake City, Utah 84112, United States.
State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University , Changchun, Jilin 130012, P. R. China.
J Am Chem Soc. 2017 Apr 12;139(14):5067-5074. doi: 10.1021/jacs.6b12536. Epub 2017 Mar 31.
The syntheses, characterization, and emission properties of three tetragonal prismatic cages, 4a-4c, constructed from eight 90° Pt(II) acceptors, four linear dipyridyl ligands, and two tetraphenylethene (TPE)-based sodium benzoate ligands, are described. These cages are emissive in dilute solutions due to the metal-coordination-induced partial restriction of intramolecular rotation of their TPE units, while the dipyridyl moieties, which act as the pillars as well as the solvents, strongly influence these emissions. Specifically, cages 4a and 4b, bearing a 4,4'-dipyridine and a 1,2-di(4-pyridyl)ethylene as their pillar parts, respectively, display good emissions in common organic solvents at 485-493 nm that are derived from the TPE units. In contrast, cage 4c, with its BODIPY-based dipyridyl unit, exhibits two emission bands at 462-473 and 540-545 nm, originating from the TPE and BODIPY fluorophores, respectively. Moreover, cage 4b has been employed as a turn-on fluorescent sensor for thiol-containing amino acids via a self-destructive reaction, while the cage can also be regenerated via the addition of Pt(II) acceptors. The studies described herein not only enrich the ongoing research on fluorescent materials but also pave the way to prepare stimuli-responsive supramolecular coordination complexes.
描述了由八个90°铂（II）受体、四个线性联吡啶配体和两个基于四苯乙烯（TPE）的苯甲酸钠配体构建的三种四方棱柱笼4a - 4c的合成、表征和发射特性。由于金属配位诱导其TPE单元分子内旋转受到部分限制，这些笼在稀溶液中具有发射性，而作为支柱以及溶剂的联吡啶部分对这些发射有强烈影响。具体而言，笼4a和4b分别以4,4'-联吡啶和1,2-二（4-吡啶基）乙烯作为其支柱部分，在常见有机溶剂中于485 - 493 nm处显示出源自TPE单元的良好发射。相比之下，具有基于BODIPY的联吡啶单元的笼4c在462 - 473和540 - 545 nm处分别表现出两个发射带，分别源自TPE和BODIPY荧光团。此外，笼4b已通过自毁反应用作含硫醇氨基酸的开启型荧光传感器，同时该笼也可通过添加铂（II）受体进行再生。本文所述的研究不仅丰富了正在进行的荧光材料研究，而且为制备刺激响应超分子配位络合物铺平了道路。
