Encapsulated Diverse Water Aggregates in Two Ag(I)/4,4′-Bipyridine/Dicarboxylate Hosts: 1D Water Tape and Chain

Abstract

Two mixed-ligand Ag(I) coordination polymers (CPs), namely, [Ag 2 (bipy) 2 (ox) 3 7H 2 O] n (1) and [Ag 2 (bipy) 2 -(adip) 3 6H 2 O] n (2) (bipy = 4,4 0 -bipyridine, H 2 ox = oxalic acid, H 2 adip = adipic acid) have been synthesized and structurally characterized. Complex 1 exhibits a three-dimensional (3D) framework constructed from ox pillared Ag-bipy sheets. Complex 2 shows a stairlike two-dimensional (2D) structure composed of adip linked Ag-bipy double chains. Of particular interest, a 1D C4 water chain and a novel 1D T7(2) water tape constructed from edge-sharing heptamer water clusters coexist in complex 1, while a 1D C6 water chain exists in complex 2. Comparing the experimental results, it is comprehensible that the dicarboyxlates play crucial roles in the formation of the diverse structures and water aggregates. Additionally, results about thermogravimetric curves and photoluminescence spectra were discussed.

Multi-functional d10 metal–organic materials based on bis-pyrazole/pyridine ligands supported by a 2,6-di(3-pyrazolyl)pyridine with different spanning flexible dicarboxylate ligands: synthesis, structure, photoluminescent and catalytic properties

“…For the free H 2 L 1 and H 2 L 2 ligands, the emission bands are observed at 357 (λ ex = 335 nm) and 357nm (λ ex = 337 nm) with a slit width of 3 : 1, respectively, which can be assigned to the ligand-centered electronic transitions, that is, the π*→n or π*→π electronic transitions. 48,49 Complex 1 displays a broad emission band at 407 nm upon excitation at 369 nm with a slit width of 3 : 1, which is red-shifted about 50 nm as compared with that of the pure H 2 L 1 ligand. Similar to 1, complex 2 also exhibits a broad emission peak at 371 nm (λ ex = 351 nm) with a slit width of 3 : 1, a red shift of 14 nm relative to that of the H 2 L 1 ligand.…”

Structural topologies involving energetically significant antiparallel π-stacking and unconventional N(nitrile)⋯π(fumarate) contacts in dinuclear Zn(ii) and polymeric Mn(ii) compounds: antiproliferative evaluation and theoretical studies

“…27,28 Various research groups have successfully explored myriad structural topologies involving discrete water cores which include dimers to decamers or even of higher order H-bonded water aggregates. 29,30 It has been well established that enclathration of discrete water clusters in supramolecular host cavities provides additional reinforcement to the host frameworks. 31…”

Anionic Water Cluster Polymers [(H2O)18(OH)2]n2n− Is Stabilized by Bis(2,2′-bipyridine) Cupric Chloride [Cu(bipy)2Cl]−

“…There has been significant attention given to the understanding of ordered water clusters in hydrophobic environments because of their importance in chemical and biological interfaces [ 4 , 5 ]. Structural studies of water clusters within the lattice of a crystal host have significantly advanced our knowledge toward understanding the behavior of bulk water [ 6 , 7 , 8 , 9 , 10 ]. Structural information of the water clusters is the first step toward understanding the behavior of bulk water [ 11 , 12 , 13 , 14 ].…”