Synthesis, crystal structures, spectral and magnetic properties of 1-D polymeric dicyanamido-metal(II) complexes

Structure, DFT Calculations, and Magnetic Characterization of Coordination Polymers of Bridged Dicyanamido-Metal(II) Complexes

“…The dicyanamido complexes display a wide range of coordination modes with divalent metal ions ranging from simple coordination mode to the terminal or central amide group (µ 1 or µ 3 ) [13,14,20,41] to complex modes including both of them. These modes, which are illustrated in Scheme 1 and have been previously summarized [10,14], include µ2 bonding: µ 1,5 (end-to-end), µ 1,1 (end-on), and µ 1,3 [9][10][11][12][13][14][17][18][19][20][21]23,41]; µ3 bonding: µ 1,1,5 and µ 1,1,3 [14,[18][19][20]24,25,[42][43][44][45][46][47][48][49]; µ4 bonding: µ 1,1,5,5 and µ 1,1,3,5 ; and µ5 bonding: µ 1,1,3,5,5 [14,18,24,25,[45][46][47][48][49]. The majority of bridged-dicyanamido-metal(II) complexes exhibit weak antiferromagnetic coupling [10][11][12][13]…”

“…This class of materials has some interesting applications in crystal engineering as they can be used to utilize molecular sensors [27], microporous materials for gas adsorption and storage [28][29][30], electrical conductivity [30], non-linear optical activity (NLO) [31,32], and catalytic reactions [33], as well as some polymeric chains, which have been constructed with Zn 2+ and Cd 2+ complexes, exhibit some potential applications as MOFs (metal-organic frameworks) [34,35]. The interaction of Zn(II) and Cd(II) with nitrogen heterocyclic coligands may lead to enhancement or quenching the fluorescence emission of the organic ligand [9,10,36]. In addition, CPs containing paramagnetic metal ions can serve as molecule-based magnets [37][38][39][40].…”

“…In addition, CPs containing paramagnetic metal ions can serve as molecule-based magnets [37][38][39][40]. The bridged pseudohalide complexes have the capability to transmit the magnetic interaction between the paramagnetic metal centers across the bridged pseudohalides [1][2][3][4][5][6][7][8][10][11][12][13][14][18][19][20][21][22][23][24].…”

“…Cd(II) with nitrogen heterocyclic coligands may lead to enhancement or quenching the fluorescence emission of the organic ligand [9,10,36]. In addition, CPs containing paramagnetic metal ions can serve as molecule-based magnets [37][38][39][40].…”

“…In the present study, the preparation and structural characterization of the 1D chain coordination polymers of 4-methoxypyridine-N-oxide In continuation of our effort to explore the coordination geometry and magnetic properties of pseudohalide metal(II) complexes containing pyridine and pyridine-N-oxide derivatives as coligands, the following study was undertaken. With pyridine-N-oxide compounds, only two bonding modes (mono-dentate and bridging µ-O,O-NPR) [7,8,10,[54][55][56][57][58][59] were found (Scheme 2). In the present study, the preparation and structural characterization of the 1D chain coordination polymers of 4-methoxypyridine-N-oxide (4-MOP-NO) with dicyanamide, catena- (2), Cd (3)) and the monomeric [Cu(dca) 2 (4-MOP-NO) 2 ] (4), are reported.…”