“…The dihedral angles between the mean planes defined the imidazole ring N1/N2/C2/C3/C5 and the coordinated and uncoordinated carboxylate groups are 2.0(2)° and 1.57(17)°, respectively, while the dihedral angles between the mean planes defined the imidazole ring N3/N4/C9/C11/C12 and the coordinated and uncoordinated carboxylate groups are 9.4(2)° and 1.61(18)°, respectively. The Cd–N bond lengths are 2.2781(13) and 2.2902(12) Å, while the Cd–O bond distances are in the range of 2.2992(11)–2.6023(11) Å, all of which are in the normal range of those observed in the reported Cd(II) complexes {[Cd(glu)(imb)]·H 2 O} n [imb = 2-(1H-imidazolyl-1-methyl)-1H-benzimidazole, H 2 glu = glutaric acid, Cd–N = 2.236(2)–2.325(2) Å, Cd–O = 2.212(2)–2.644(2) Å] 24 and [Cd 2 (cbimdaH) 2 (H 2 O) 6 ] n ·(DMF) 3 n ·(H 2 O) 3 n [cbimdaH 3 = 1-(4-carboxybenzyl)-1H-imidazole-4,5-dicarboxylic acid, Cd–N = 2.263(3)–2.294(3) Å, Cd–O = 2.252(4)–2.673(3) Å]. 25…”
A new Cd(II) complex, [Cd(H4pbidc)(H2O)] n (1), incorporating 2,2′-(propane-1,3-diyl)bis(1H- imidazole-4,5-dicarboxylic acid) (H6pbidc) was synthesized and characterized by elemental analysis, infrared spectra and X-ray single-crystal diffraction. In complex 1, each Cd(II) ion is hepta-coordinated, showing a significantly distorted pentagonal-bipyramidal coordination environment. Adjacent Cd(II) ions are alternately joined through two carboxylate oxygen atoms and two bridging water molecules resulting in a one-dimensional chain structure. In the solid state, adjacent chains are further linked by hydrogen bonds, forming a three-dimensional supramolecular architecture. Meanwhile, the interactions of complex 1 with bovine serum albumin were analysed by fluorescence measurements under physiological conditions. The results indicated that the fluorescence intensity of bovine serum albumin was decreased considerably upon the addition of complex 1 through a static quenching mechanism with formation of one binding site. The negative values of the thermodynamic parameters including enthalpy change (Δ H), entropy change (Δ S) and Gibbs free energy change (Δ G) showed that hydrogen bonding and van der Waals forces were the main interactions in the binding of complex 1 to bovine serum albumin, and the binding process is spontaneous in thermodynamics.
“…The dihedral angles between the mean planes defined the imidazole ring N1/N2/C2/C3/C5 and the coordinated and uncoordinated carboxylate groups are 2.0(2)° and 1.57(17)°, respectively, while the dihedral angles between the mean planes defined the imidazole ring N3/N4/C9/C11/C12 and the coordinated and uncoordinated carboxylate groups are 9.4(2)° and 1.61(18)°, respectively. The Cd–N bond lengths are 2.2781(13) and 2.2902(12) Å, while the Cd–O bond distances are in the range of 2.2992(11)–2.6023(11) Å, all of which are in the normal range of those observed in the reported Cd(II) complexes {[Cd(glu)(imb)]·H 2 O} n [imb = 2-(1H-imidazolyl-1-methyl)-1H-benzimidazole, H 2 glu = glutaric acid, Cd–N = 2.236(2)–2.325(2) Å, Cd–O = 2.212(2)–2.644(2) Å] 24 and [Cd 2 (cbimdaH) 2 (H 2 O) 6 ] n ·(DMF) 3 n ·(H 2 O) 3 n [cbimdaH 3 = 1-(4-carboxybenzyl)-1H-imidazole-4,5-dicarboxylic acid, Cd–N = 2.263(3)–2.294(3) Å, Cd–O = 2.252(4)–2.673(3) Å]. 25…”
A new Cd(II) complex, [Cd(H4pbidc)(H2O)] n (1), incorporating 2,2′-(propane-1,3-diyl)bis(1H- imidazole-4,5-dicarboxylic acid) (H6pbidc) was synthesized and characterized by elemental analysis, infrared spectra and X-ray single-crystal diffraction. In complex 1, each Cd(II) ion is hepta-coordinated, showing a significantly distorted pentagonal-bipyramidal coordination environment. Adjacent Cd(II) ions are alternately joined through two carboxylate oxygen atoms and two bridging water molecules resulting in a one-dimensional chain structure. In the solid state, adjacent chains are further linked by hydrogen bonds, forming a three-dimensional supramolecular architecture. Meanwhile, the interactions of complex 1 with bovine serum albumin were analysed by fluorescence measurements under physiological conditions. The results indicated that the fluorescence intensity of bovine serum albumin was decreased considerably upon the addition of complex 1 through a static quenching mechanism with formation of one binding site. The negative values of the thermodynamic parameters including enthalpy change (Δ H), entropy change (Δ S) and Gibbs free energy change (Δ G) showed that hydrogen bonding and van der Waals forces were the main interactions in the binding of complex 1 to bovine serum albumin, and the binding process is spontaneous in thermodynamics.
“…7 Succinic acid has no contribution to the fluorescence emission of complex 1; similar cases have been reported. 18 In contrast to free immb, complex 1 shows a slightly red-shifted emission band caused by the metalligand coordination interactions which influence the rigidity and asymmetry of the ligands and the coordination environment of the metal centres. 19,20 In the case of complex 1, the decrease in fluorescence intensity may be due to the vibrational quenching by the presence of lattice water molecules.…”
The metal–organic complex {[Zn(immb)(suc)]·H2O}n [immb = 2-[(1H-imidazol-1-yl)methyl]-6-methyl-1H-benzimidazole, H2suc = succinic acid] has been prepared and its crystal structure determined. Its fluorescence and thermogravimetric data have also been obtained.
“…This has permitted incorporation of high C-rates with impressive cycle life due to the enhanced stability of the composite anode [59,60]. With the advent of graphene, there has been an interest in SnO 2 -graphene composites with the hope that the high surface area and superior electrical conductivity of graphene could enhance the rate capability [61,62].…”
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.