Ag(I) Complexes Generated from Double Schiff-Base Ligand with Thiazole as the Terminal Binding Sites

Abstract

A double Schiff-base ligand 1,4-bis(2-thiazolyl)-2,3-diaza-1,3-butadiene (L8) has been synthesized, and its coordination chemistry with various silver salts AgX (X ) SbF 6 -, SO 3 CF 3 -, H 2 PO 4 -, and NO 3 -) has been investigated. The resulting molecular structures are delicately dependent on the nature of the counterions and the solvent intermedia. Uncoordinating counterions (X ) SbF 6and SO 3 CF 3 -) generated the hydrogen-bonded frameworks based on discrete molecular complex building blocks, whereas coordinating anions (X ) H 2 PO 4and NO 3 -) formed polymeric complexes driven by the metal-anion interactions. Furthermore, the luminescent and electrical conductive properties of some new complexes were investigated.

Crystal Structure and Photoluminescence Properties of One Two-Dimensional Coordination Polymer [Ag2L1.5(NO3)2(CH3CN)]n (L = N,N′-Bis(furan-2-ylmethylene)hydrazine)

“…Furthermore, the luminescent properties of organic-inorganic coordination polymers and supramolecular complexes assemble from double Schiff-base ligands have been investigated. [11,16,20,23] To enrich the fluorescent database of this type, the solid-state luminescent properties of the polymer 1 were investigated at room temperature. As shown in Figure 4, upon excitation at 272 nm, polymer 1 shows luminescent emission maximum at 470 nm, which is similar to the emission maximum of [Ag 2 L(NO 3 ) 2 ] n at 480 nm upon excitation at 290 nm.…”

“…[1][2][3][4] Among them, diazine Schiffbase ligands with two coordination portions linked by a single N−N bridge are excellent ligands, which are easy to prepare and inexpensive, allowing us to systematically probe the effect of modifications to the ligand backbone through which we are attempting to control the precise topography, or microarchitecture, of the arrays. [3][4][5][6][7][8][9][10][11][12][13][14][15] Herein the chosen ligand, N,N -bis(furan-2-ylmethylene)hydrazine L, with two furanylimine sites connected by a single bond, is one of the simplest imine-based ligands, which has been used to assemble some coordination polymers or networks such as [Ag 2 L(NO 3 ) 2 ] n , [16] [Ag 2 L 2 ](BF 4 ) 2 } n , [16] {[Ag 2 L 3 ](ClO 4 ) 2 } n , [16] {[Ag 2 L 3 ](PF 6 ) 2 } n , [16,17] [18] [Na 2 L 2 (ClO 4 ) 2 (H 2 O) 4 ], [19] and [{Ag 2 L 3 (BF 4 ) 2 } H 2 O] n . [20] Interestingly, the structural topologies of the metalorganic frameworks in self-assembly processes not only are influenced by the nature of different counteranions due to the electroneutrality principle of ligand L, but also participate in other types of factors, notably with the solvent systems.…”

(E)-N′-{7-Methoxyspiro[chromeno[4,3-d]thiazole-4,1′-cyclohexan]-2-yl}-N,N-dimethylacetimidamide

“…For the biological activity of thiazoles, see: Pawar et al (2009). Schiff bases and acetamidine play an important role in many biological processes and are of great importance for the preparation of various pharmaceuticals, see: More et al (2001); Sutariya et al (2007); Murza et al (1999); Dong et al (2006); Jayashree et al (2005); Modi et al (1971); Vicini et al (2003). For standard bond-length data, see: Allen et al (1987).…”

Crystal structures of two new dinuclear Ag(I) complexes constructed from 4,4′-biphenyldicarboxylic acid and N-containing ligands

“…Silver(I) is particularly useful in the self-assembly of complex structures since it is a labile metal center with versatile coordination properties [4][5][6]. Silver(I) complexes with carboxylates and organic amines are a group of metal complexes that because of their versatile structures and wide usage in many fields have attracted much attention in recent years [7][8][9].…”