A novel layered compound, [Ni(C 10 H 8N 2) 2V 3O 8 5 ], was hydrothermally synthesized and structurally characterized by single crystal X ray diffraction. The compound crystallizes in monoclinic system, space group P2...A novel layered compound, [Ni(C 10 H 8N 2) 2V 3O 8 5 ], was hydrothermally synthesized and structurally characterized by single crystal X ray diffraction. The compound crystallizes in monoclinic system, space group P2 1/c with a =1 551 8(3) nm, b =1 476 1(3) nm, c =1 048 3(2) nm, β=92 02(3)°, V = 2 399 8 (8) nm 3, Z=4, R=0 046 7, wR 2= 0 085 9.展开更多
Hydroxyapatite(HA) powders were prepared by hydrothermal treatment of CaHPO 4 ·2H 2 O with Ca(OH) 2 and characterized by XRD, FTIR, SEM, TEM. The results indicate that pH value and tem perature show great influen...Hydroxyapatite(HA) powders were prepared by hydrothermal treatment of CaHPO 4 ·2H 2 O with Ca(OH) 2 and characterized by XRD, FTIR, SEM, TEM. The results indicate that pH value and tem perature show great influences on the structure and morphology of the products. At pH=9 and 120 ℃, the HA whis- kers were obt ained with an aspect ratio>20, and typical diameter and length of 40 nm and 6 00 nm, respectively.展开更多
A new complex[Co（NIPH）（mbix）]n（1,H2NIPH = 5-nitroisophthalic acid,mbix =l,3-bis（imidazol-l-ylmethyl）benzene） has been hydrothermally synthesized and structurally characterized by elemental analysis,IR spectrum...A new complex[Co（NIPH）（mbix）]n（1,H2NIPH = 5-nitroisophthalic acid,mbix =l,3-bis（imidazol-l-ylmethyl）benzene） has been hydrothermally synthesized and structurally characterized by elemental analysis,IR spectrum,UV spectrum,TG and single-crystal X-ray diffraction.Pink crystals crystallize in the triclinic system,space group P1 with a = 8.3797（8）,b= 10.2522（10）,c= 13.4244（13） A,α=94.820（2）,β=108.105（2）,γ=104.816（2）°,V=1042.84（17） A^3,C（22）H（17）CoN5O6,Mr = 506.34,Dc = 1.613 g/cm^3,F（000） = 518,Z = 2,μ（MoKα） =0.876 mm^（-1）,the final R = 0.0505 and wR = 0.1254 for 3267 observed reflections（I〉2σ（I））.The structure of 1 exhibits a two-dimensional network structure and is extended into a three-dimensional supramolecule through hydrogen bonds and n-n interactions.In addition,Natural Bond Orbital（NBO） analysis was performed by using the PBE0/LANL2 DZ method built in Gaussian 09 Program.The calculation results showed obvious covalent interactions between the coordinated atoms and Co（Ⅱ） ion.展开更多
A metal-organic coordination polymer [Cd（tdc）（bimb）（μ2-H2O）]n （H2tdc = thiophe-ne-2,5-dicarboxylic acid, bimb = 1,4-bis（imidazol-l-yl）-butane） 1 has been hydrothermally synthe- sized and characterized by el...A metal-organic coordination polymer [Cd（tdc）（bimb）（μ2-H2O）]n （H2tdc = thiophe-ne-2,5-dicarboxylic acid, bimb = 1,4-bis（imidazol-l-yl）-butane） 1 has been hydrothermally synthe- sized and characterized by elemental analysis, IR, TG, luminescence spectrum and single-crystal X-ray diffraction. Colorless crystals crystallize in the triclinic system, space group P^-1 with a = 5.8945（3）, b = 10.3129（5）, c = 11.2226（5） A, a = 95.1430（10）,β = 97.9020（10）, γ = 90.5910（10）°, V = 672.84（6） A^3, C11H11CdN2O5S, Mr= 395.68, De = 1.953 g/cm^3, μ（MoKa） = 1.797 mm^-1, F（000） = 390, Z = 2, the final R = 0.0209 and wR = 0.0508 for 2514 observed reflections （I 〉 2σ（I））. The structure of 1 exhibits a two-dimensional layer-like structure.展开更多
Among the reactions catalyzed by zeolites there are some that exhibit high selectivity due to the spatial confinement effect of the zeolite framework.Tailoring the acidity,particularly the distribution and location of...Among the reactions catalyzed by zeolites there are some that exhibit high selectivity due to the spatial confinement effect of the zeolite framework.Tailoring the acidity,particularly the distribution and location of the Bronsted acid sites in the zeolite is effective for making it a better catalyst for these reactions.We prepared a series of H-mordenite（H-MOR） samples by varying the composition of the sol-gel,using different structure directing agents and post-treatment.NH3-TPD and IR characterization of adsorbed pyridine were employed to determine the amount of Bronsted acid sites in the 8-membered ring and 12-membered ring channels.It was shown that controlled synthesis was a promising approach to improve the concentration of Bronsted acid sites in MOR,even with a low Al content.Using an appropriate composition of Si and Al in the sol-gel favored a higher proportion of Bronsted acid sites in the 8-membered ring channels.HMI as a structure-direct agent gave an obvious enrichment of Bronsted acid sites in the 8-membered ring.Carbonylation of dimethyl ether was used as a probe reaction to examine the modification of the acid properties,especially the Bronsted acid sites in the 8-membered ring channels.There was a linear relationship between methyl acetate formation and the number of Bronsted acid sites in the 8-membered ring channels,demonstrating the successful modification of acid properties.Our results provide information for the rational design and modification of zeolites with spatial constraints.展开更多
The hydrothermal reaction of NH 4VO 3, CoCl 2·6H 2O, o-phen and H 2O gave a novel two-dimensional layered polyoxovanadate, [Co(o-phen)]V 2O 6·H 2O, which was constructed from {V 2O 6} chains linked by Co(o-p...The hydrothermal reaction of NH 4VO 3, CoCl 2·6H 2O, o-phen and H 2O gave a novel two-dimensional layered polyoxovanadate, [Co(o-phen)]V 2O 6·H 2O, which was constructed from {V 2O 6} chains linked by Co(o-phen) complex fragments. [Co(o-phen)]V 2O 6·H 2O was characterized by IR, TG and single-crystal X-ray diffraction. It crystallizes in monoclinic space group P2(1)/c with a= 0.785 2(9) nm, b=2.118 3(2) nm, c=0.946 3(11) nm, β=112.827(2)°, V=0.145 1(3) nm3, D c=2.074 g/cm3, Z=4, R 1=0.038 8, wR 2=0.094 1.展开更多
文摘A novel layered compound, [Ni(C 10 H 8N 2) 2V 3O 8 5 ], was hydrothermally synthesized and structurally characterized by single crystal X ray diffraction. The compound crystallizes in monoclinic system, space group P2 1/c with a =1 551 8(3) nm, b =1 476 1(3) nm, c =1 048 3(2) nm, β=92 02(3)°, V = 2 399 8 (8) nm 3, Z=4, R=0 046 7, wR 2= 0 085 9.
文摘Hydroxyapatite(HA) powders were prepared by hydrothermal treatment of CaHPO 4 ·2H 2 O with Ca(OH) 2 and characterized by XRD, FTIR, SEM, TEM. The results indicate that pH value and tem perature show great influences on the structure and morphology of the products. At pH=9 and 120 ℃, the HA whis- kers were obt ained with an aspect ratio>20, and typical diameter and length of 40 nm and 6 00 nm, respectively.
基金supported by the Science and Technology Development Project of Jilin Provincial Science&Technology Department(201205080)the Science and Technology Research Projects of the Education Office of Jilin Province(No.2013.384)
文摘A new complex[Co（NIPH）（mbix）]n（1,H2NIPH = 5-nitroisophthalic acid,mbix =l,3-bis（imidazol-l-ylmethyl）benzene） has been hydrothermally synthesized and structurally characterized by elemental analysis,IR spectrum,UV spectrum,TG and single-crystal X-ray diffraction.Pink crystals crystallize in the triclinic system,space group P1 with a = 8.3797（8）,b= 10.2522（10）,c= 13.4244（13） A,α=94.820（2）,β=108.105（2）,γ=104.816（2）°,V=1042.84（17） A^3,C（22）H（17）CoN5O6,Mr = 506.34,Dc = 1.613 g/cm^3,F（000） = 518,Z = 2,μ（MoKα） =0.876 mm^（-1）,the final R = 0.0505 and wR = 0.1254 for 3267 observed reflections（I〉2σ（I））.The structure of 1 exhibits a two-dimensional network structure and is extended into a three-dimensional supramolecule through hydrogen bonds and n-n interactions.In addition,Natural Bond Orbital（NBO） analysis was performed by using the PBE0/LANL2 DZ method built in Gaussian 09 Program.The calculation results showed obvious covalent interactions between the coordinated atoms and Co（Ⅱ） ion.
基金supported by the Science and Technology Research Projects of the Education Department of Jilin Province (No. 2012.479)
文摘A metal-organic coordination polymer [Cd（tdc）（bimb）（μ2-H2O）]n （H2tdc = thiophe-ne-2,5-dicarboxylic acid, bimb = 1,4-bis（imidazol-l-yl）-butane） 1 has been hydrothermally synthe- sized and characterized by elemental analysis, IR, TG, luminescence spectrum and single-crystal X-ray diffraction. Colorless crystals crystallize in the triclinic system, space group P^-1 with a = 5.8945（3）, b = 10.3129（5）, c = 11.2226（5） A, a = 95.1430（10）,β = 97.9020（10）, γ = 90.5910（10）°, V = 672.84（6） A^3, C11H11CdN2O5S, Mr= 395.68, De = 1.953 g/cm^3, μ（MoKa） = 1.797 mm^-1, F（000） = 390, Z = 2, the final R = 0.0209 and wR = 0.0508 for 2514 observed reflections （I 〉 2σ（I））. The structure of 1 exhibits a two-dimensional layer-like structure.
基金supported by the National Natural Science Foundation of China(21325626,21406120)the Postdoctoral Science Foundation of China(2014M560181,2015T80214)~~
文摘Among the reactions catalyzed by zeolites there are some that exhibit high selectivity due to the spatial confinement effect of the zeolite framework.Tailoring the acidity,particularly the distribution and location of the Bronsted acid sites in the zeolite is effective for making it a better catalyst for these reactions.We prepared a series of H-mordenite（H-MOR） samples by varying the composition of the sol-gel,using different structure directing agents and post-treatment.NH3-TPD and IR characterization of adsorbed pyridine were employed to determine the amount of Bronsted acid sites in the 8-membered ring and 12-membered ring channels.It was shown that controlled synthesis was a promising approach to improve the concentration of Bronsted acid sites in MOR,even with a low Al content.Using an appropriate composition of Si and Al in the sol-gel favored a higher proportion of Bronsted acid sites in the 8-membered ring channels.HMI as a structure-direct agent gave an obvious enrichment of Bronsted acid sites in the 8-membered ring.Carbonylation of dimethyl ether was used as a probe reaction to examine the modification of the acid properties,especially the Bronsted acid sites in the 8-membered ring channels.There was a linear relationship between methyl acetate formation and the number of Bronsted acid sites in the 8-membered ring channels,demonstrating the successful modification of acid properties.Our results provide information for the rational design and modification of zeolites with spatial constraints.
文摘The hydrothermal reaction of NH 4VO 3, CoCl 2·6H 2O, o-phen and H 2O gave a novel two-dimensional layered polyoxovanadate, [Co(o-phen)]V 2O 6·H 2O, which was constructed from {V 2O 6} chains linked by Co(o-phen) complex fragments. [Co(o-phen)]V 2O 6·H 2O was characterized by IR, TG and single-crystal X-ray diffraction. It crystallizes in monoclinic space group P2(1)/c with a= 0.785 2(9) nm, b=2.118 3(2) nm, c=0.946 3(11) nm, β=112.827(2)°, V=0.145 1(3) nm3, D c=2.074 g/cm3, Z=4, R 1=0.038 8, wR 2=0.094 1.
