Three new cobalt（II） coordination compounds, [Co（3,3＇-Hbpt）2（H2pm）（H20）2]＇2H20 （1）, [Co（4,4＇-Hbpt）（pm）0.5（H20）]＇3H20 （2） and [Co（3,4＇-Hbpt）（pm）0.5（H20）3]＇2H20 （3） （3,3＇-Hbpt = 3,5-bis...Three new cobalt（II） coordination compounds, [Co（3,3＇-Hbpt）2（H2pm）（H20）2]＇2H20 （1）, [Co（4,4＇-Hbpt）（pm）0.5（H20）]＇3H20 （2） and [Co（3,4＇-Hbpt）（pm）0.5（H20）3]＇2H20 （3） （3,3＇-Hbpt = 3,5-bis（3-pyridyl）-lH-1,2,4-triazole; 4,4＇-bpt = 3,5-bis（4-pyridyl）- 1H-1,2,4-triazole, 3,4＇-Hbpt = 3-（3-pyridyl）-5-（4＇-pyridyl）-lH-1,2,4-triazole and Hapm = pyromellitic acid） have been synthe- sized by hydrothermal reactions. Single-crystal X-ray diffraction reveals that compound 1 has a one-dimensional （1D） chain network, 2 exhibits a four-connected three-dimensional （3D） structure with 1D open channels encapsulated by water molecules, while 3 displays a regular two-dimensional （2D） architecture connected through 1D metal helical chains. In addition, the effi- cacy of compounds 1-3 as additives to promote the thermal decomposition of ammonium perchlorate （AP） is explored by dif- ferential scanning calorimetry （DSC）.展开更多
Five transition metal coordination compounds, [Mn2（8-qoac）E（bdc）（H2O）4]（1）（8-qoacH=quinoline-8-oxy- acetate acid, H2bdc=benzene-1,4-dicarboxylic acid）, [Zn4（8-qoac）4（bdc）2]n（2）, {[CdE（8-qoac）E（Hip）...Five transition metal coordination compounds, [Mn2（8-qoac）E（bdc）（H2O）4]（1）（8-qoacH=quinoline-8-oxy- acetate acid, H2bdc=benzene-1,4-dicarboxylic acid）, [Zn4（8-qoac）4（bdc）2]n（2）, {[CdE（8-qoac）E（Hip）2（H2O）2]·（H2O）4}n（3）（H2ip=benzene-1,3-dicarboxylic acid）, [Pb3（8-qoac）2（bdc）1.5（HEO）Cl]n（4） and [Zn2（8-qoac）（8-ql）（bdc）]n （5）（8-Hql=8-hydroxyquinoline）, were synthesized by hydrothermal syntheses of metal salts with benzenedicarboxy- lic acid and 8-qoacH. Compound 1 possesses a discrete dimer bridged by bdc2- ligand. Compound 2 presents a 2D layer network constructed from bdc2- linkers and 1D infinite ribbons, in which Zn（II） centers are bridged by 8-qoac- with a tetradentate binding mode. Compound 3 displays a 1D zigzag chain, with adjacent chains further connected via extensive O-H…O hydrogen bonds to generate a 3D supramolecular structure. Compound 4 shows a 3D framework containing trinuclear lead secondary building units and bdc2- linkers, in which a new coordination mode of 8-qoac- ligand is observed. In compound 5, Zn（II） ions are simultaneously bridged by 8-qoac-, 8-ql- and bdc2- ligands to form tetranuclear zinc units, which are further interlinked by bdc2- linkers to yield a 2D wave-like layer. Based on intrali- gand（IL）（π-π＊） fluorescent emission, compounds 1--5 possess strong purple fluorescent emissions. In addition, the thermal stabilities of compounds 1--5 were studied.展开更多
Solid complexes,RE(Et_(2)dtc)_(3)(phen)(RE=La,Pr,Nd,Sm-Lu),were synthesized with sodium diethyldithiocarbamate(NaEt_(2)dtc3H_(2)O),1,10-phenanthroline(o-phen·H_(2)O)and hydrated lanthanide chlorides in absolute e...Solid complexes,RE(Et_(2)dtc)_(3)(phen)(RE=La,Pr,Nd,Sm-Lu),were synthesized with sodium diethyldithiocarbamate(NaEt_(2)dtc3H_(2)O),1,10-phenanthroline(o-phen·H_(2)O)and hydrated lanthanide chlorides in absolute ethanol.The constant-volume combustion energies of complexes,Δ_(c)U,were determined by a precise rotating-bomb calorimeter at 298.15 K.The standard enthalpies of combustion,Δ_(c)H^(θ)_(m),and standard enthalpies of formation,Δ_(f)H^(θ)_(m),were calculated for these complexes,respectively.The experiment results showed the'tripartite effect'of rare earth.展开更多
Three new heterometallic coordination compounds, namely, [KCu（I3）（L）2（H2O）2]n （1）, [KCu（I3）（L）2（H20）]n （2） and [CIIK4（I3）z（L＇）4]n （3）, were prepared and characterized （HL=5-methylpyrazine-2-car...Three new heterometallic coordination compounds, namely, [KCu（I3）（L）2（H2O）2]n （1）, [KCu（I3）（L）2（H20）]n （2） and [CIIK4（I3）z（L＇）4]n （3）, were prepared and characterized （HL=5-methylpyrazine-2-carboxylic acid, HL＇=p-tolylacetic acid）. Structural studies revealed that 1 and 2 exhibit 3D frameworks with rectangular channels occupied by triiodide ions. Both compounds can be symbolized as a 5-connected net with pcu topology. In compound 3, a one-dimensional polyhedral chain is connected by hexanuclear mask like clusters [Cu2K408]. These chains are further linked each other via rare （1,1,3,3）-triiodide ion-bridging units to generate a 3D （4,5,6）-connected net with the point symbol of { 12}2{4·12^2}4{4^6}{4^8·62}4{49.66}4. It is noteworthy that water-induced reversible dissolution/reorganization processes occur between 1/2 and [Cu（L）2（HzO）],＇3nH20. The thermal and photoluminescence properties of compounds 1, 2, and 3 were investigated as well.展开更多
基金supported by the National Natural Science Foundation of China(21073142,21173168and21127004)the Natural Science Foundation of Shaanxi Province(SJ08B09)the Natural Science Foundation of the Department of Education of Shaanxi Province(2010JK882,2010JQ2007and11JS110)
文摘Three new cobalt（II） coordination compounds, [Co（3,3＇-Hbpt）2（H2pm）（H20）2]＇2H20 （1）, [Co（4,4＇-Hbpt）（pm）0.5（H20）]＇3H20 （2） and [Co（3,4＇-Hbpt）（pm）0.5（H20）3]＇2H20 （3） （3,3＇-Hbpt = 3,5-bis（3-pyridyl）-lH-1,2,4-triazole; 4,4＇-bpt = 3,5-bis（4-pyridyl）- 1H-1,2,4-triazole, 3,4＇-Hbpt = 3-（3-pyridyl）-5-（4＇-pyridyl）-lH-1,2,4-triazole and Hapm = pyromellitic acid） have been synthe- sized by hydrothermal reactions. Single-crystal X-ray diffraction reveals that compound 1 has a one-dimensional （1D） chain network, 2 exhibits a four-connected three-dimensional （3D） structure with 1D open channels encapsulated by water molecules, while 3 displays a regular two-dimensional （2D） architecture connected through 1D metal helical chains. In addition, the effi- cacy of compounds 1-3 as additives to promote the thermal decomposition of ammonium perchlorate （AP） is explored by dif- ferential scanning calorimetry （DSC）.
基金Supported by the National Natural Science Foundation of China（Nos.21373162, 21073142, 21173168, 21127004, 21273171）, the Natural Science Foundation of the Department of Education of Shaanxi Province, China（Nos.llJSll0, 2010JK882, 2010JQ2007, 08JK459, 11JK0578） and the Natural Science Foundation of Shangluo University, China（Nos.12SKY012, 13SKY-FWDF006）.
文摘Five transition metal coordination compounds, [Mn2（8-qoac）E（bdc）（H2O）4]（1）（8-qoacH=quinoline-8-oxy- acetate acid, H2bdc=benzene-1,4-dicarboxylic acid）, [Zn4（8-qoac）4（bdc）2]n（2）, {[CdE（8-qoac）E（Hip）2（H2O）2]·（H2O）4}n（3）（H2ip=benzene-1,3-dicarboxylic acid）, [Pb3（8-qoac）2（bdc）1.5（HEO）Cl]n（4） and [Zn2（8-qoac）（8-ql）（bdc）]n （5）（8-Hql=8-hydroxyquinoline）, were synthesized by hydrothermal syntheses of metal salts with benzenedicarboxy- lic acid and 8-qoacH. Compound 1 possesses a discrete dimer bridged by bdc2- ligand. Compound 2 presents a 2D layer network constructed from bdc2- linkers and 1D infinite ribbons, in which Zn（II） centers are bridged by 8-qoac- with a tetradentate binding mode. Compound 3 displays a 1D zigzag chain, with adjacent chains further connected via extensive O-H…O hydrogen bonds to generate a 3D supramolecular structure. Compound 4 shows a 3D framework containing trinuclear lead secondary building units and bdc2- linkers, in which a new coordination mode of 8-qoac- ligand is observed. In compound 5, Zn（II） ions are simultaneously bridged by 8-qoac-, 8-ql- and bdc2- ligands to form tetranuclear zinc units, which are further interlinked by bdc2- linkers to yield a 2D wave-like layer. Based on intrali- gand（IL）（π-π＊） fluorescent emission, compounds 1--5 possess strong purple fluorescent emissions. In addition, the thermal stabilities of compounds 1--5 were studied.
基金supported by the National Natural Science Foundation of China(Grant No.20171036)Education Committee of Shaanxi Province(No.01JK229)Northwest University(02NW02)
文摘Solid complexes,RE(Et_(2)dtc)_(3)(phen)(RE=La,Pr,Nd,Sm-Lu),were synthesized with sodium diethyldithiocarbamate(NaEt_(2)dtc3H_(2)O),1,10-phenanthroline(o-phen·H_(2)O)and hydrated lanthanide chlorides in absolute ethanol.The constant-volume combustion energies of complexes,Δ_(c)U,were determined by a precise rotating-bomb calorimeter at 298.15 K.The standard enthalpies of combustion,Δ_(c)H^(θ)_(m),and standard enthalpies of formation,Δ_(f)H^(θ)_(m),were calculated for these complexes,respectively.The experiment results showed the'tripartite effect'of rare earth.
基金the financial support of the National Natural Science Foundation of China (21373162, 21073142, 21173168 and21203149)the Natural Science Foundation of Shaanxi Province (11JS110, FF10091 and SJ08B09)
文摘Three new heterometallic coordination compounds, namely, [KCu（I3）（L）2（H2O）2]n （1）, [KCu（I3）（L）2（H20）]n （2） and [CIIK4（I3）z（L＇）4]n （3）, were prepared and characterized （HL=5-methylpyrazine-2-carboxylic acid, HL＇=p-tolylacetic acid）. Structural studies revealed that 1 and 2 exhibit 3D frameworks with rectangular channels occupied by triiodide ions. Both compounds can be symbolized as a 5-connected net with pcu topology. In compound 3, a one-dimensional polyhedral chain is connected by hexanuclear mask like clusters [Cu2K408]. These chains are further linked each other via rare （1,1,3,3）-triiodide ion-bridging units to generate a 3D （4,5,6）-connected net with the point symbol of { 12}2{4·12^2}4{4^6}{4^8·62}4{49.66}4. It is noteworthy that water-induced reversible dissolution/reorganization processes occur between 1/2 and [Cu（L）2（HzO）],＇3nH20. The thermal and photoluminescence properties of compounds 1, 2, and 3 were investigated as well.
