Doistau Benjamin, Rossi-Gendron Caroline, Tron Arnaud, McClenaghan Nathan D, Chamoreau Lise-Marie, Hasenknopf Bernold, Vives Guillaume
Sorbonne Universités, UPMC Univ Paris 06, UMR 8232, Institut Parisien de Chimie Moléculaire, 4 place Jussieu, 75005, Paris, France.
Dalton Trans. 2015 May 14;44(18):8543-51. doi: 10.1039/c4dt03230f.
Molecular tweezers incorporating peripheral platinum salphen complexes and a central chelating terpyridine group have been synthesized. The terpyridine can be switched upon metal binding between a free 'W' shaped form and a coordinated 'U' form. The crystallographic structure of the zinc-closed molecular tweezers was obtained and presented a strong π-stacking between the Pt-salphen units associated with a Pt-Pt bond. The luminescence properties, notably in response to selected guest ions (Zn(2+), Pb(2+), Hg(2+)) and the resulting mechanical motion, have been investigated by UV-Vis and emission spectroscopy. While ion coordination to the terpy resulted in no significant changes in the luminescence, a selective intercalation of a second Hg(2+) associated with a large differential quenching was observed.
已合成了包含外围铂双水杨醛缩邻苯二胺配合物和中心螯合三联吡啶基团的分子镊子。三联吡啶在与金属结合时可在游离的“W”形和配位的“U”形之间转换。获得了锌封闭分子镊子的晶体结构，该结构显示与Pt-Pt键相关的Pt-双水杨醛缩邻苯二胺单元之间存在强烈的π堆积。通过紫外可见光谱和发射光谱研究了发光性质，特别是对选定客体离子（Zn(2+)、Pb(2+)、Hg(2+)）的响应以及由此产生的机械运动。虽然离子与三联吡啶的配位导致发光没有显著变化，但观察到第二个Hg(2+)的选择性插入并伴有较大的差异猝灭。
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