The synthesis and characterization of PEG-like macromolecular structures on Nit inol surface from tri (ethylene glycol) dimethyl-ether under ECR-cold-plasma conditions were discussed. It was demonstrated that based o...The synthesis and characterization of PEG-like macromolecular structures on Nit inol surface from tri (ethylene glycol) dimethyl-ether under ECR-cold-plasma conditions were discussed. It was demonstrated that based on high-resolution ES CA, ATR-FTIR and contact angle investigations, the deposited PEG-like layers a re composed mainly of -CH 2-CH 2-O- linkages. These structures have a relati vely low contact angle. Compared to the unmodified surfaces, the plasma-treated Nitinol surfaces are more hydrophilic. Plasma enhanced coatings of PEG-like la yers can prevent Ni ion from releasing, thereby improving the biocompatibility o f Nitinol.展开更多
A new quaternary mixed anion complex of gadolinium(Ⅲ), [Gd(CH 3CH 2COO) 2(N O 3)(phen)] 2, was synthesized and structurally characterized. The ESR spectr um of the complex with effective g values of 5.314, 2 47...A new quaternary mixed anion complex of gadolinium(Ⅲ), [Gd(CH 3CH 2COO) 2(N O 3)(phen)] 2, was synthesized and structurally characterized. The ESR spectr um of the complex with effective g values of 5.314, 2 473 and 1.880 in poly crys talline powder at room temperature is quite different from the U spectrum. The c oordination number of Gd 3+ is nine with a monocapped square antiprism geom etry. And the stacking effect was observed in the complex. The crystal of the co mplex belongs to triclinic with space group P 1, a=0.9626(4) n m, b=0.9732(4) nm, c=1.1758(5) nm, α=102.45(1)°, β=108.16(1) °, γ=96.68(2)°, V=1.0018(7) nm3, Z=2, D c=1.80 g·cm -3 , μ(MoKα)=33.63 mm -1, F(000)=530, GOF=1.80, R=0.023 and R w=0.027.展开更多
The novel copper(II) coordination polymer with 2-oxo-propionic acid be nzoyl hydrazone and hexamethylenetetramine ligands, {Cu( μ2-C10H8N2O3)( μ2-C6H 12N4)1/2}n (C10H8N2O32- is the dinegative ion of 2-oxo-propionica...The novel copper(II) coordination polymer with 2-oxo-propionic acid be nzoyl hydrazone and hexamethylenetetramine ligands, {Cu( μ2-C10H8N2O3)( μ2-C6H 12N4)1/2}n (C10H8N2O32- is the dinegative ion of 2-oxo-propionicacid benzoyl hyd razone), has been synthesized and characterized by elemental analysis and IR spe ctroscopy. The crystal structure was determined by single crystal X-ray diffrac tion analysis. The results show that the crystal of the title coordination polym er belongs to monoclinic space group C2/c, the cell parameters are as follows: a =1.787 5(2) nm, b=0.730 93(9) nm, c=2.038 2(2) nm, β=92.890(2)°, and V=2.659 6 (5) nm3, Z=8, Dc=1.687 Mg·m-3, μ(Mo Kα)=1.659 mm-1, F(000)=1 384, R=0.031 1, wR=0.079 0 for 2 454 observed reflections (I>2σ(I)) out of 2887 unique reflecti ons. In this copper(II) coordination polymer, each copper(II) ion is five-coordi nated with a geometry of distorted square-pyramid. Two oxygen atoms of the carbo xyl of each C10H8N2O32- acts as a bridge to bond two neighboring copper(II) ions , leading to an infinite one-dimensional chainlike coordination polymer. Each ch ain is linked by coordinated hexamethylenetetramines with its neighbors to form an infinite two-dimensional network structure. CCDC: 255347.展开更多
基金Funded by the National Natural Science Foundation of China (No.1997207150274065) and the Special Funds for Major State Basic Research Project (No.2002CB412704)
文摘The synthesis and characterization of PEG-like macromolecular structures on Nit inol surface from tri (ethylene glycol) dimethyl-ether under ECR-cold-plasma conditions were discussed. It was demonstrated that based on high-resolution ES CA, ATR-FTIR and contact angle investigations, the deposited PEG-like layers a re composed mainly of -CH 2-CH 2-O- linkages. These structures have a relati vely low contact angle. Compared to the unmodified surfaces, the plasma-treated Nitinol surfaces are more hydrophilic. Plasma enhanced coatings of PEG-like la yers can prevent Ni ion from releasing, thereby improving the biocompatibility o f Nitinol.
文摘A new quaternary mixed anion complex of gadolinium(Ⅲ), [Gd(CH 3CH 2COO) 2(N O 3)(phen)] 2, was synthesized and structurally characterized. The ESR spectr um of the complex with effective g values of 5.314, 2 473 and 1.880 in poly crys talline powder at room temperature is quite different from the U spectrum. The c oordination number of Gd 3+ is nine with a monocapped square antiprism geom etry. And the stacking effect was observed in the complex. The crystal of the co mplex belongs to triclinic with space group P 1, a=0.9626(4) n m, b=0.9732(4) nm, c=1.1758(5) nm, α=102.45(1)°, β=108.16(1) °, γ=96.68(2)°, V=1.0018(7) nm3, Z=2, D c=1.80 g·cm -3 , μ(MoKα)=33.63 mm -1, F(000)=530, GOF=1.80, R=0.023 and R w=0.027.
文摘The novel copper(II) coordination polymer with 2-oxo-propionic acid be nzoyl hydrazone and hexamethylenetetramine ligands, {Cu( μ2-C10H8N2O3)( μ2-C6H 12N4)1/2}n (C10H8N2O32- is the dinegative ion of 2-oxo-propionicacid benzoyl hyd razone), has been synthesized and characterized by elemental analysis and IR spe ctroscopy. The crystal structure was determined by single crystal X-ray diffrac tion analysis. The results show that the crystal of the title coordination polym er belongs to monoclinic space group C2/c, the cell parameters are as follows: a =1.787 5(2) nm, b=0.730 93(9) nm, c=2.038 2(2) nm, β=92.890(2)°, and V=2.659 6 (5) nm3, Z=8, Dc=1.687 Mg·m-3, μ(Mo Kα)=1.659 mm-1, F(000)=1 384, R=0.031 1, wR=0.079 0 for 2 454 observed reflections (I>2σ(I)) out of 2887 unique reflecti ons. In this copper(II) coordination polymer, each copper(II) ion is five-coordi nated with a geometry of distorted square-pyramid. Two oxygen atoms of the carbo xyl of each C10H8N2O32- acts as a bridge to bond two neighboring copper(II) ions , leading to an infinite one-dimensional chainlike coordination polymer. Each ch ain is linked by coordinated hexamethylenetetramines with its neighbors to form an infinite two-dimensional network structure. CCDC: 255347.
