Non-covalent molecular tweezer/guest complexation with Pt(ii)⋯Pt(ii) metal–metal interactions: toward intelligent photocatalytic materials†,Materials Chemistry Frontiers

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Non-covalent molecular tweezer/guest complexation with Pt(ii)⋯Pt(ii) metal–metal interactions: toward intelligent photocatalytic materials†
Materials Chemistry Frontiers ( IF 6.0 ) Pub Date : 2017-10-18 00:00:00 , DOI: 10.1039/c7qm00424a
Zijian Li _{1,

2,

3,

4,

5} , Yifei Han _{1,

2,

3,

4,

5} , Zongchun Gao _{1,

2,

3,

4,

5} , Tengfei Fu _{1,

2,

3,

4,

5} , Feng Wang _{1,

2,

3,

4,

5}

Affiliation

A new organoplatinum(II) molecular tweezer with a stimuli-responsive 2,2′:6′,2′′-terpyridine spacer has been synthesized, which undergoes “U”- to “W”-shaped conformational transition upon adding Zn²⁺ ions. The molecular tweezer receptor displays a high binding affinity toward the complementary guests, with the implementation of Pt(II)⋯Pt(II) metal–metal interactions for the non-covalent tweezering systems. MMLCT absorbance simultaneously emerges in the visible-light region (470–620 nm), which can be sensitized by O₂ and thereby utilized for photo-catalyzed reactions in organic and aqueous media. Moreover, temporally “on-demand” photo-catalytic efficiency can be accomplished, via the successive addition of Zn(OTf)₂ and a competitive ligand to the supramolecular tweezering photosensitizers. Hence, the current study opens up new avenues toward intelligent photocatalytic materials via elaborate supramolecular engineering.

中文翻译：

具有Pt（ii）⋯Pt（ii）金属间相互作用的非共价分子镊子/客体络合物：朝向智能光催化材料†

合成了一种新型的有机铂（II）分子钳，该分子钳具有刺激性的2,2'：6'，2''-吡啶吡啶间隔基，在添加Zn ²⁺后会经历从“ U”形到“ W”形的构象转变离子。分子镊子受体对互补客体显示出很高的结合亲和力，并且在非共价镊子系统中实现了Pt（II）⋯Pt（II）金属间的相互作用。MMLCT吸光度同时出现在可见光区域（470-620 nm）中，可以被O ₂敏化，从而用于有机和水性介质中的光催化反应。此外，在时间“按需”的光催化效率可以实现，通过Zn（OTf）₂和竞争性配体相继添加到超分子镊光敏剂中。因此，当前的研究通过精细的超分子工程为智能光催化材料开辟了新途径。

更新日期：2017-10-18

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