NDLI: A 2D network silver coordination polymer with the multimodal ligand 2-pyrazyl methyl ketazine

Content Provider	Springer Nature Link
Author	Sengul, Abdurrahman Kurt, Ozgur Buyukgungor, Orhan
Copyright Year	2011
Abstract	A two-dimensional coordination polymer {Ag(PMK)(OTf)·MeCN}$_{ n }$ (1) based on multi-modal bridging ligand, namely N,N′-bis[1-(pyrazin-2-yl)ethylidene]-hydrazine or 2-pyrazyl methyl ketazine (PMK), and AgOTf salt has been synthesized and characterized by ESI-MS, $^{1}$H-NMR, ATR-IR, and single crystal X-ray diffraction. The PMK shows distinct binding sites, both chelating and monodentate, and bridging modes in 1 where each silver(I) centre is five coordinate, and bound to one bidentate pyrazylketimine and a monodentate pyrazine through the peripheral N atom from another ligand, and also a bridging pyrazine through the peripheral N atom of the adjacent chelating unit from another ligand, and to triflate anion to feature one-dimensional infinite chain. The triflate anions have effectively increased the 1D coordination polymers to a 2D network via H-bonding interactions. These 2D planes are stacked together building up channels (1D tube) in which the acetonitrile solvent molecules reside and form very weak contacts with the triflates and the pyrazylketimine units via C–H···O and C–H···N, respectively. In addition, the fluorescent spectrum of 1 in the solid state exhibits two emission maxima at 496 and 522 nm. The ESI-MS, IR, and $^{1}$H-NMR confirm the structure.Self-assembly reaction of multimodal ligand (PMK = N,N′-bis[1-(pyrazin-2-yl)ethylidene]-hydrazine) and AgOTf gives unprecedented one-dimensional coordination polymer {Ag(PMK)(OTf)·MeCN}$_{ n }$ (1) with distinct coordination modes of the ligand and the solid state fluorescence spectrum. The triflate anions which are weakly coordinated to silver(I) centres in 1, cross-link the chains by intermolecular hydrogen bonding interactions into a 2D network. These 2D planes are stacked together building up square channels (1D tubes) in which the acetonitrile solvent molecules reside.
Starting Page	925
Ending Page	929
Page Count	5
File Format	PDF
ISSN	10400400
Journal	Structural Chemistry
Volume Number	22
Issue Number	4
e-ISSN	15729001
Language	English
Publisher	Springer US
Publisher Date	2011-03-23
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Coordination polymer Silver Multimodal ligand Luminescence Crystal structures Pyrazine Computer Applications in Chemistry Theoretical and Computational Chemistry Physical Chemistry
Content Type	Text
Resource Type	Article
Subject	Physical and Theoretical Chemistry Condensed Matter Physics

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