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Dipyridyl sulphide ligands 4-(pyridin-4-ylmethylthio)pyridine (abbreviated as L1) and 3-(pyridin-4-ylmethylthio)pyridine (abbreviated as L2) have been designed and used as μ- N , N -bridging linkages to construct coordination polymers with free –S–CH 2 – groups as secondary donor sites. By use solvent control method, coordination polymers {[Ag 3 SO 4 (L1) 3 ](Cl)·4.5H 2 O} ∞ ( 1 ), {[Ag 2 SO 4 (L1) 2 ]·6H 2 O·2CH 3 OH} ∞ ( 2 ), {[Ag 2 SO 4 (L2) 2 ]·H 2 O} ∞ ( 3 ) and {[Ag 4 (SO 4 ) 2 (L2) 4 ]·5H 2 O} ∞ ( 4 ) with different architectures were obtained. Complexes 1 , 3 and 4 feature 1D channel with different sizes and structures. Complex 1 exhibits guest exchange by THF and 1,4-dioxane, and Hg 2+ sorption ability from solution due to its relative larger channel and available bonding sites of –S– exposed to the channel region. All complexes have been characterized through single-crystal and powder X-ray diffraction (PXRD), FT-IR spectra, X-ray photoelectron spectroscopy (XPS), elemental and thermogravimetric analyses. The guest exchange and Hg 2+ sorption were monitored and identified, and the structure-property relationship of coordination polymers 1–4 are discussed. [ABSTRACT FROM AUTHOR]

4-(4-(Nitromethyl)benzylthio)pyridine (abbreviated as L), a ligand bearing 4-pyridyl and nitrobenzene groups, functions as a monodentate ligand and reacts with cobalt(II) chloride and silver(I) perchlorate, leading to new complexes [Co(L)]Cl ( 1) and [Ag(L)]ClO ( 2), respectively. Ligand L and complexes 1 and 2 were characterized through X-ray diffraction, IR spectroscopy and elemental analyses. The coordination geometry of Co(II) and Ag(I) exhibit a slightly-distorted tetrahedron and trigonal planar geometry, respectively. The structures of Ligand L [Monoclinic, P2/c, a = 7.8041(3) Å, b = 20.7401(8) Å, c = 7.2625(3) Å, α = 90°, β = 97.946(3)°, γ = 90°], Complex 1 [Triclinic, P-1, a = 16.2634(14) Å, b = 12.4102(5) Å, c = 13.6324(7) Å, α = 102.733(3)°, β = 95.632(3)°, γ = 99.480(3)°], and Complex 2 [Monoclinic, P2/c, a = 7.6144(6) Å, b = 12.8989(12) Å, c = 28.052(2) Å, α = 90°, β = 92.308(4)°, γ = 90°] reveal several different types of intermolecular interactions, such as Ag···O, π-stacking interactions, and C-H···X (X=O, S, halogen) interactions. Graphical Abstract: Mononuclear complexes [Co(L)]Cl and [Ag(L)]ClO were readily obtained and characterized [L = multidentate 4-(4-(nitromethyl)benzylthio)pyridine], the ligand behavior and the supramolecular architectures of which are observed and discussed. [Figure not available: see fulltext.] [ABSTRACT FROM AUTHOR]

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Highlights: [•] New complexes with the same starting materials were successfully achieved. [•] Solvent and/or counter anion play a key role for complex formation. [•] Semi-rigid bi-pyrimidinyl sulfide takes an interesting unvaried configuration. [ABSTRACT FROM AUTHOR]

C13H10AgBF4N2O3, orthorhombic, Pbca (no. 61), a = 13.2751(5) Å, b = 14.6212(5) Å, c = 15.5573(6) Å, V = 3019.6 Å3, Z = 8, Rgt(F) = 0.0498, wRref(F2) = 0.1423, T = 296 K. [ABSTRACT FROM AUTHOR]