NDLI: Syntheses, Structures and Magnetic Properties of Two Novel Cu(II) Diphosphonate Coordination Polymers with N-Heterocyclic Auxiliary Ligand

Content Provider	Springer Nature Link
Author	Ma, Kui Rong Wei, Chun Li Zhang, Yu Cong, Ming Hui Hu, Hua You
Copyright Year	2013
Abstract	By introducing the second organic N-heterocyclic ligand 2,2′-bipyridine (2,2′-bipy), two binuclear examples of Cu(II)-diphosphonate coordination polymers based on 1-hydroxyethylidenediphosphonic acid (H$_{5}$L=CH$_{3}$C(OH)(PO$_{3}$H$_{2}$)$_{2}$), [Cu$_{2}$(H$_{4}$L)$_{2}$(H$_{3}$L)(2,2′-bipy)$_{2}$] 1 and [Cu(H$_{3}$L)(2,2′-bipy)] 2, have been hydrothermally obtained and characterized by powder X-ray diffraction, elemental analysis, IR, TG-DSC. The single-crystal X-ray diffractions show that both the two compounds possess zero-dimensional binuclear structures built through a single O–P–O bridge for 1 and a double O–P–O bridge for 2 in syn–anti fashion. Then H-bond and π–π interactions further expand the two zero-dimensional binuclear structures into three-dimensional supramolecular frameworks. Fluorescent measurements reveal that the maximum emission peaks of 1–2 centered at 423.5 nm for 1 and 423 nm for 2, respectively, are mainly caused by intraligand π*–π emission state of N-heterocyclic ligand 2,2′-bipy (λ $_{ex}$ = 233 nm). The further magnetic study shows the two coordination polymers exhibit ferromagnetic behaviors derived from O–P–O bridges in syn–anti mode between the metal centers.
Starting Page	629
Ending Page	637
Page Count	9
File Format	PDF
ISSN	15741443
Journal	Journal of Inorganic and Organometallic Polymers and Materials
Volume Number	23
Issue Number	3
e-ISSN	15741451
Language	English
Publisher	Springer US
Publisher Date	2013-01-26
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Binuclear Cu(II)-diphosphonate Structure Ferromagnetic Fluorescence Inorganic Chemistry Organic Chemistry Polymer Sciences
Content Type	Text
Resource Type	Article
Subject	Materials Chemistry Polymers and Plastics

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