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Four mixed-ligand silver(I) coordination polymers (CPs) {Ag2(tpyz)(L)}_n ( 1 ), {Ag4(tpyz)2(L)2}_n ( 2 ), {Ag2(mpyz)(L)}_n ( 3 ) as well as its isomer ( 4 ), (tpyz-2,3,5-trimethylpyrazine, mpyz = 2,3,5,6-tetramethylpyrazine, H2L = (+)-camphoric acid), were synthesized with reactions of L and pyrazine derivatives with silver nitrate in different solvent systems. Systematic characterizations with single-crystal X-ray diffraction indicate that, 1 and 3 show a 3D framework which constructed by silver(I) and L anion, the pyrazine derivatives only give one N to connect to metal, which may be due to the disorder of the methyl which shares the same carbon with carboxylate; 2 and 4 demonstrate a 2D 4 4 –sql network. The difference between two: one structure is single layer and the other is double layer. Furthermore, 4 contains a 1D helical chains which connected by Ag(I) and mpyz ligand. Meanwhile, the L anion exhibits different coordination modes in 1 – 4 . 1 – 4 spanning from two-dimensional network to three-dimensional framework suggest that the kinds of pyrazine derivatives and solvents play significant roles in the formation of such coordination architectures. The thermogravimetric analyses (TGA), IR, and photoluminescence were also measured. [ABSTRACT FROM AUTHOR]

Six coordination compounds of Ag(I) and 2,4-diamino-6-[2-(2-methyl-1-imidazolyl)ethyl]-1,3,5-triazine (L, Ag:L = 1:2) with different anions and solvents, namely, [Ag(L) 2 ]∙(NO 3 )∙4(H 2 O) ( 1 ), [ Ag ( L ) 2 ] · 1 / 2 ( nds ) · ( MeOH ) · ( H 2 O ) ( 2 , H 2 nds = 1,5-naphthalenedisulfonic acid), [ Ag ( L ) 2 ] · 1 / 2 ( nds ) · ( MeOH ) · 5 / 2 ( H 2 O ) ( 3 ), [ Ag ( L ) 2 ] · 1 / 2 ( nds ) · ( CH 3 CN ) ( 4 ), [Ag(L) 2 ]∙(ClO 4 )∙(MeOH)∙(H 2 O) ( 5 ), and [Ag(L) 2 ]∙(ClO 4 )∙2(H 2 O) ( 6 ), have been synthesized and characterized by elemental analysis, IR, PXRD and X-ray single-crystal diffraction. In these compounds, each Ag(I) ion is ligated by two imidazole nitrogens to form a Ag(L) 2 unit. The anions and solvents determine hydrogen-bonding between the DAT groups links the Ag(L) 2 units whether to form chains in 1 and 2 or layers in 3 – 6 . In addition, thermogravimetric analysis (TGA) and luminescent properties of these compounds were also investigated. [ABSTRACT FROM AUTHOR]

Achiral ligand- and Ag(i)-driven spontaneous resolution occurred simultaneously in the formation of two enantiomers 1P and 1M of [Ag2(5-nip)(mpyz)] (5-nip = 5-nitroisophthalic, mpyz = 2,3,5,6-tetramethylpyrazine), whose absolute sense of a helix made of achiral components is induced by the metal Ag(i) through argentophilic interactions. [ABSTRACT FROM AUTHOR]