Institute of Molecular Functional Materials (Areas of Excellence Scheme, University Grants Committee, Hong Kong) and Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, PR China.
Dalton Trans. 2011 Dec 7;40(45):12228-34. doi: 10.1039/c1dt10741k. Epub 2011 Aug 30.
Two platinum(II) terpyridyl-based metallo-supramolecular triblock copolymers, ClPt(tpy)PEO-PPO-PEO(tpy)PtCl(2) (1) and (Ph-C≡C)Pt(tpy)PEO-PPO-PEO(tpy)Pt(C≡C-Ph)(2) (2), have been synthesized and characterized. The two complexes were found to aggregate with PtPt and/or π-π interactions at high temperature, which have not been reported so far, as revealed by UV/Vis absorption, emission and (1)H NMR study. This is due to the formation of spherical micelles driven by the PEO-PPO-PEO copolymers at temperatures above the critical micelle temperature, which was confirmed by TEM and DLS. The red-near-infrared (NIR) emission of the complexes can be switched on and off by at least ten cycles of heating and cooling, suggesting that the micellization was highly reversible.
两种基于铂(II)三吡啶基的金属超分子两亲嵌段共聚物，ClPt(tpy)PEO-PPO-PEO(tpy)PtCl（2）（1）和(Ph-C≡C)Pt(tpy)PEO-PPO-PEO(tpy)Pt(C≡C-Ph)（2）（2），已经被合成并进行了表征。通过紫外/可见吸收、发射和（1）H NMR 研究发现，这两种配合物在高温下会发生 PtPt 和/或 π-π 相互作用的聚集，这是迄今为止尚未报道过的，这是由于在高于临界胶束温度时，PEO-PPO-PEO 共聚物的存在驱动了球形胶束的形成。这一点通过 TEM 和 DLS 得到了证实。复合物的近红外（NIR）发射可以通过至少十次的加热和冷却循环来开启和关闭，这表明胶束化是高度可逆的。
