Cobalt titanate and gallium titanate zeolites were synthesized hydrothermally using tetraethylammonium hydroxide and/or tetrapropylammonium bromide as template. The study of the effects of pH value, amount and feed or...Cobalt titanate and gallium titanate zeolites were synthesized hydrothermally using tetraethylammonium hydroxide and/or tetrapropylammonium bromide as template. The study of the effects of pH value, amount and feed order of template and reaction time on the products indicated that the most important factor was the pH value of the reaction medium, which must be in between 2 to 6 to give zeolite crystals. The products have been characterized by XRD, SEM, DTA, IR, UV Vis and N 2 adsorption techniques to be microporous zeolites, where Ti atoms are in complexation forms of TiO 4 and TiO 6. The Co titanate and Ga titanate zeolites had specific area of 263 and 204 m 2/g, respectively.展开更多
A novel coordination polymer of [Co( p-CPOA)(2,2′-bipy)(H2O)]n ( p-CPOA2-=4-carboxylphenoxyacetate dianion, 2,2′-bipy=2,2′-bipyridine) was synthesized and characterized by elemental analysis, IR and X-ray single cr...A novel coordination polymer of [Co( p-CPOA)(2,2′-bipy)(H2O)]n ( p-CPOA2-=4-carboxylphenoxyacetate dianion, 2,2′-bipy=2,2′-bipyridine) was synthesized and characterized by elemental analysis, IR and X-ray single crystal diffraction. The title complex crystallizes in monoclinic space group C2/c, with a=1.424 4(3) nm, b=1.316 6(3) nm, c=1.947 7(4) nm, β=104.56(3)°. V=3.535 3(14) nm3, Z=8, R=0.028 5, wR=0.089 1. The cobalt(Ⅱ) ion displays a distorted octahedral coordination geometry, defined by three carboxyl oxygen atoms from different p-CPOA2- groups, two nitrogen atoms from 2,2′-bipyridine ligand and one water molecule. The cobalt atoms are bridged by p-CPOA2- groups, forming a one-dimensional chain structure along a axis. The adjacent Co...Co atoms distance is 0.996 8 nm. A layer supramolecular network is contrsucted by the hydrogen bonds and π-π stacking interactions. CCDC: 220039.展开更多
文摘Cobalt titanate and gallium titanate zeolites were synthesized hydrothermally using tetraethylammonium hydroxide and/or tetrapropylammonium bromide as template. The study of the effects of pH value, amount and feed order of template and reaction time on the products indicated that the most important factor was the pH value of the reaction medium, which must be in between 2 to 6 to give zeolite crystals. The products have been characterized by XRD, SEM, DTA, IR, UV Vis and N 2 adsorption techniques to be microporous zeolites, where Ti atoms are in complexation forms of TiO 4 and TiO 6. The Co titanate and Ga titanate zeolites had specific area of 263 and 204 m 2/g, respectively.
文摘A novel coordination polymer of [Co( p-CPOA)(2,2′-bipy)(H2O)]n ( p-CPOA2-=4-carboxylphenoxyacetate dianion, 2,2′-bipy=2,2′-bipyridine) was synthesized and characterized by elemental analysis, IR and X-ray single crystal diffraction. The title complex crystallizes in monoclinic space group C2/c, with a=1.424 4(3) nm, b=1.316 6(3) nm, c=1.947 7(4) nm, β=104.56(3)°. V=3.535 3(14) nm3, Z=8, R=0.028 5, wR=0.089 1. The cobalt(Ⅱ) ion displays a distorted octahedral coordination geometry, defined by three carboxyl oxygen atoms from different p-CPOA2- groups, two nitrogen atoms from 2,2′-bipyridine ligand and one water molecule. The cobalt atoms are bridged by p-CPOA2- groups, forming a one-dimensional chain structure along a axis. The adjacent Co...Co atoms distance is 0.996 8 nm. A layer supramolecular network is contrsucted by the hydrogen bonds and π-π stacking interactions. CCDC: 220039.
