A new ligand for the formation of a 3D structure by significant C–H⋯S hydrogen bonds and π–π interactions

Syntheses, Crystal Structures, and Photoluminescent Properties of a Series of M(II) Coordination Polymers Containing M−X2−M Bridges: From 1-D Chains to 2-D Networks

“…On the basis of these considerations, we herein report the synthesis of a new ligand with angular and flexible spacers based on dipyridylamine, N , N , N ‘, N ‘-tetrakis(2-pyridyl)-2,6-pyridinediamine ( L ), and used it as a bent bridging ligand to obtain a series of novel complexes with MX 2 salts (M = Zn(II), Cd(II), Hg(II); X = Cl, Br, I): Zn 2 LCl 4 ( 1 ), {[Cd 2 L(μ-Cl) 2 ]Cl 2 } n · n H 2 O ( 2 ), {[Cd 2 L(μ-Br) 2 ]Br 2 } n · n H 2 O ( 3 ) {[Cd 2 L(μ-I)(μ···I)]I 2 } n ( 4 ), Hg 2 LCl 4 ( 5 ), Hg 2 LBr 4 ( 6 ), and Hg 2 LI 4 ( 7 ). Generally, the study of bent ligands has been mainly focused on dipyridyl, diimidazolyl, or triazolyl units. 1b-g,, The use of a pentapyridyl ligand as a bent building block is rather rare. In contrast to the pyridylethene, pyridylacetylene, pyridylbenzene, imidazolyl, and triazolyl groups, 1b-g,, dipyridylamino groups are more flexible, which will enhance the structural diversity.…”

Synthesis, crystal structures and electrochemical properties of two new metal-centered ferrocene complexes

“…Taking the van der Waals radii of H and S to be 1.20 and 2.05 Å, respectively, any H···S contact of less than 3.25 Å and C-H···S angle greater than 130° can therefore be considered as being significant [37] . The C-H···S hydrogen bond is very important in supramolecular self-assembly [38,39] . (ii) Structure of the copper complex Cu(OAc) 2 (L) 2 (2).…”

Synthesis, crystal structure, and properties of a three-dimensional coordination polymer [Cd(PMP)2] n

“…The design and construction of coordination polymers by self-assembly process have been a flourishing field of research not only for their intriguing topological networks but also for their potential applications as functional materials [1][2][3][4][5][6][7][8][9][10][11][12]. Owing to interest in applications such as biological imaging, photochemical catalysis, light-driven fuel production, highly efficient luminescent devices, and luminescent chemosensors, the luminescent complexes have recently attracted much attention [13,14].…”

“…Owing to interest in applications such as biological imaging, photochemical catalysis, light-driven fuel production, highly efficient luminescent devices, and luminescent chemosensors, the luminescent complexes have recently attracted much attention [13,14]. Many researches on cadmium complexes [7,[15][16][17][18][19][20] showed that Cd(II) complexes may be severed as luminescent materials, because Cd(II) has d 10 electronic configuration and large radius, can adopt various geometries and coordination numbers, and enhance/develop luminescence intensity upon coordination with conjugated p systems containing aromatic rings [4][5][6]21]. On the other hand, the derivatives of pyrazolone and their metal complexes have been widely studied [22][23][24][25][26][27][28] for their biological and pharmacological activities and potential applications [29,30].…”