Self‐Assembly of Tunable Heterometallic Ln–Ru Coordination Polymers with Near‐Infrared Luminescence and Magnetocaloric Effect. Issue 12 (31st January 2017)

• Record Type: Journal Article
• Authors: Wang, Lei; Xie, Zhigang; Dang, Song; Sun, Zhong‐Ming
• Is Part Of: Chemistry. Volume 23:Issue 12(2017)
• Page Start: 2852
• Page End: 2857
• Publication Date: 2017-01-31
• Subjects: coordination polymers -- lanthanides -- luminescence -- magnetocaloric effect -- ruthenium; Chemistry -- Periodicals; 540
• DOI: 10.1002/chem.201604869
• Languages: English
• ISSNs: 0947-6539

Abstract

Abstract: A series of heterometallic lanthanide (Ln)–Ru coordination polymers, denotedGd‐1, Yb‐2, andNd‐3, were prepared by solvothermal reaction of a carboxylate derivative of [Ru(bpy)3 ] 2+ (Rubpy, bpy=2, 2′‐bipyridine), oxalic acid, and Ln(OAc)3 by using the metalloligand strategy. Single‐crystal X‐ray diffraction indicated that the resulting isostructural heterometallic complexes have 1D butterfly‐shaped Ln–Ru‐based coordination chains but show slight differences in the coordination environments of the Ln centers. The introduced Ru(bpy) metalloligands could act as good light‐harvesting antennas to effectively sensitize near‐infrared (NIR) luminescence by energy transfer from the triplet metal‐to ligand charge transfer state of Rubpy units to Ln (Yb or Nd) under the excitation in the visible‐light region. Additionally, dopant‐concentration‐dependent behavior of the Ru‐based emission and sensitized NIR emission was demonstrated inGd‐1 . Finally, the magnetocaloric effect ofGd‐1 was studied. The preparation of such heterometallic coordination polymers offers a versatile platform to investigate dimensionally controlled properties. Abstract : Like a butterfly : A series of lanthanide (Ln)–Ru coordination polymers was prepared by using the metalloligand strategy. The as‐synthesized heterometallic coordination polymers, which have 1D butterfly‐shaped Ln–Ru‐based coordination chains, are a versatile platform for the investigation of sensitized near‐infrared luminescence and the (see figure).