60041-69-2Relevant academic research and scientific papers
The synthesis, structure, magnetic and luminescent properties of a new tetranuclear dysprosium (III) cluster
Chen, Yen-Han,Tsai, Yun-Fan,Lee, Gene-Hsian,Yang, En-Che
experimental part, p. 166 - 171 (2012/02/05)
The synthesis and characterization of [Dy4(dhampH 3)4(NO3)2](NO3) 2 (1), a new tetranuclear dysprosium (III) complex, is described. The compound was characterized by its X-ray structure, magnetic properties as well as the luminescent spectra. The compound crystallizes in a P1 space group with a zig-zag linear form of geometry. The ac magnetic susceptibilities of the molecule indicate that it is a magnetic molecule with a slow magnetization relaxation. The molecule also exhibits an emission spectrum that was confirmed to be ligand based. These results indicate that this molecule has both a slow magnetization relaxation (that could be potentially a SMM) and luminescent properties.
A double arene hydroxylation mediated by dicopper(II)-hydroperoxide species
Battaini, Giuseppe,Monzani, Enrico,Perotti, Angelo,Para, Cristina,Casella, Luigi,Santagostini, Laura,Gullotti, Michele,Dillinger, Renee,Naether, Christian,Tuczek, Felix
, p. 4185 - 4198 (2007/10/03)
The dicopper(II) complex [Cu2(L)]4+ (L =α,α′-bis{bis[2-(1′-methyl-2′- benzimidazolyl)ethyl]amino}-m-xylene) reacts with hydrogen peroxide to give the dicopper(II) -hydroquinone complex in which the xylyl ring of the ligand has undergone a double hydroxylation reaction at ring positions 2 and 5. The dihydroxylated ligand 2,6-bis({bis[2-(3-methyl-1 H-benzimidazo[-2-yl)ethyl]amino}methyl)benzene-1,4-diol was isolated by decomposition of the product complex. The incorporation of two oxygen atoms from H2O2 into the ligand was confirmed by isotope labeling studies using H218O2. The pathway of the unusual double hydroxylation was investigated by preparing the two isomeric phenolic derivatives of L, namely 3,5-bis({bis[2-(1-methyl- 1H-benzimidazol-2-yl)ethyl]amino}methyl) phenol (6) and 2,6-bis({bis[2-(1-methyl-1H-benzimidazol-2-yl)- ethyl]amino}methyl)phenol (7), carrying the hydroxyl group in one of the two positions where L is hydroxylated. The dicopper(II) complexes prepared with the new ligands 6 and 7 and containing bridging μ-phenoxo moieties are inactive in the hydroxylation. Though, the dicopper(II) complex 3 derived from 6 and containing a protonated phenol is rapidly hydroxylated by H202 and represents the first product formed in the hydroxylation of [Cu2(L)]4+. Kinetic studies performed on the reactions of [Cu2(L)]4+ and 3 with H2O2 show that the second hydroxylation is faster than the first one at room temperature (0.13 ± 0.05 s-1 vs 5.0(±0.1) X 10-3 s-1) and both are intramolecular processes. However, the two reactions exhibit different activation parameters (ΔH? = 39.1 ± 0.9 kJ mol-1 and ΔS? = -115.7 ± 2.4 J K-1 mol-1 for the first hydroxylation; ΔH? = 77.8 ± 1.6 kJ mol-1 and ΔS? = -14.0 ± 0.4 J K-1 mol-1 for the second hydroxylation). By studying the reaction between [Cu2(L)]4+. and H2O2 at low temperature, we were able to characterize the intermediate η1:η1-hydroperoxodicopper(II) adduct active in the first hydroxylation step, [Cu2(L)(OOH)]3+ [λmax = 342 (ε 12 000), 444 (ε 1200), and 610 nm (ε 800 M-1cm-1); broad EPR signal in frozen solution indicative of magnetically coupled Cu(II) centers].
Selective anion sensing based on a dual-chromophore approach
Lee, Dong Hoon,Lee, Ho Yong,Lee, Kwan Hee,Hong, Jong-In
, p. 1188 - 1189 (2007/10/03)
A new anion sensor 1 with an azophenol and p-nitrophenyl moieties as chromophores allows for easy colorimetric differentiation of F(-), H2PO4(-) and AcO(-) with similar basicity.
Bis(guanidinium)-Alkohole als Modelle der Staphylokokken-Nuclease: Substratbindung ueber Ionenpaarkomplexe und schnelle Phosphoryl-Uebertragungsreaktionen
Muche, Marc-Steffen,Goebel, Michael W.
, p. 2263 - 2265 (2007/10/03)
Keywords: Enzymmimetica; Guanidine; Molekulare Erkennung; Phosphorylierungen
The Synthesis of Ortho-, Meta-, and Paracyclophane- Type Thiacrown Compounds and Their Characteristics as Extractive-Spectrophotometric Reagents for Class b Metals-Silver and Copper
Muroi, Motoho,Kamiki, Teruo,Sekido, Eiichi
, p. 1797 - 1801 (2007/10/02)
Ortho-, meta-, and paracyclophane-type thiacrown compounds bearing 4-4(nitrophenylazo)phenol as a chromogenic group were synthesized, aand their characteristics as extractive-spectrophotometric reagents for the class b metals, consisting of soft Lewis aci
