Jing-Ping Zhang

Encapsulated different forms of water molecules by Cu(II) complexes with diverse structures

Three new supramolecular copper complexes have been prepared possessing different frameworks to host different forms of water. The 1D chain complex {[Cu(terpyOH)(phth)]·H2O}n (1), the binuclear complex [Cu2(terpyO)2(phth)(H2O)2]·11H2O (2), the mononuclear complex [Cu(terpyOH)(SO4)(H2O)]·2H2O (3) (terpyOH = 4′-hydroxy-2,2′:6′,2′′-terpyridine and phth = phthalate) were obtained by changing pH values (1, 2) and in situ reaction (3). Their structures were characterized by single crystal X-ray diffraction analysis. In complex 1, the CuII ions are bridged by phthalate dianions to form infinite Z-shaped chains with terpyOH pendants and discrete water molecules. Coexistence of (H2O)16 and (H2O)10 water clusters in the complex 2 forms a novel 2D water sheet. A near-planar S-shaped water chain assembled by hydrogen bonds is formed for 3. The 4′-bromo-2,2′:6′,2′′-terpyridine was converted into terpyOH in situ under hydrothermal conditions for complex 3.

An asymmetric TTF derivative bearing a phenyl β-diketone group as an efficient ligand towards functional materials

A novel asymmetric tetrathiafulvalene (TTF) derivative bearing a conjugated phenyl β-diketone moiety 1-(4-tetrathiafulvalyphenyl)-4,4,4-trifluorobutane-1,3-dione (TTF-ph-tfacH) has been synthesized using feasible methods and fully characterized. The chelating ability of its enolate anion (TTF-ph-tfac) has been investigated with [MIICl2·xH2O] (M = Zn and Co) leading to complexes [Zn(TTF-ph-tfac)2(CH3OH)2] (2a) and [Co(TTF-ph-tfac)2(CH3OH)2] (2b), where the metal center is coordinated with two TTF-ph-tfac ligands and two methanol molecules. This redox active ligand shows promising features for the elaboration of hybrid organic–inorganic building blocks. The magnetic analysis for 2b reveals very weak antiferromagnetic interactions between spin centers, which would be a precursor for magnetic conductors. The herein reported mono-substituted TTF derivative interconnected via the phenyl group, which is of extended conjugation, enhanced planarity, and asymmetric geometry, shows a great promise to multifunctional (conducting, non-linear optical, and magnetic) materials.

4,4',5,5'-Tetrakis(methyl­sulfanyl)tetrathia­fulvalene

The title compound, C10H12S8, crystallizes in a monoclinic space group with one molecule in the asymmetric unit. All bond lengths and angles in the molecule are normal. The crystal packing is stabilized by van der Waals forces.