The title compound （C12H15NO13S, Mr = 413.31） was synthesized by the nitration of napthalene-1,4-dicarboxylate acid in mixed nitric and sulfuric acids. It crystallizes in monoclinic, space group P2 1/c with a = 8.10...The title compound （C12H15NO13S, Mr = 413.31） was synthesized by the nitration of napthalene-1,4-dicarboxylate acid in mixed nitric and sulfuric acids. It crystallizes in monoclinic, space group P2 1/c with a = 8.100（1）, b = 24.369（3）, c = 8.634（1） A, β = 105.380（2）°, V = 1643.1（4） A^3, Z = 4, Dc = 1.671 g/cm^3, F（000） = 856, μ（MoKa） = 0.273 mm^- 1, T = 294（2） K, the final R = 0.0400 and wR = 0.1021 for 2866 observed reflections with I 〉 2σ（I）. In this crystal there exist a number of H-bonds which link the molecules to form a three-dimensional infinite network structure. The thermal decomposition of the title compound was investigated by using TG-DTG and DSC techniques.展开更多
Cu2ZnSn（S,Se）4（CZTSSe） thin film was prepared using a simple two-step approach based on the single-source evaporation and synchronous sulfo-selenization.Composition,microstructure,morphology,and properties of the ...Cu2ZnSn（S,Se）4（CZTSSe） thin film was prepared using a simple two-step approach based on the single-source evaporation and synchronous sulfo-selenization.Composition,microstructure,morphology,and properties of the asprepared CZTSSe thin films were investigated.XRD and Raman patterns confirmed the formation of single-phase CZTSSe solid solutions.SEM results showed that the CZTSSe thin film had a uniform morphology and large grains.EDS results revealed the composition of CZTSSe film was Cu：Zn：Sn：S：Se = 23.7：12.6：12.2：37.7：13.8（in at%）,which was in accordance with the stoichiometric Cu2ZnSn（S,Se）4.The optical band gap of CZTSSe thin film evaluated from its UV–Vis spectrum was 1.33 eV.The resistivity,carrier concentration,and mobility were 0.53 X cm,7.9 9 1018cm3,and 7.5 cm2/（Vs）,respectively.展开更多
The development of new versatile alkylation reagents that can be transformed from diverse available chemical raw materials is highly desirable.Here,an efficient,metal-free organic photoredox-catalyzed direct alkylatio...The development of new versatile alkylation reagents that can be transformed from diverse available chemical raw materials is highly desirable.Here,an efficient,metal-free organic photoredox-catalyzed direct alkylation of heteroarenes via a desulphurization strategy using alkylsulfonium salts as alkylation reagents under mild conditions has been described for the first time.The inexpensive and efficient organic photoredox-catalyzed method offers a new and useful strategy for constructing various biologically interesting heteroarenes in the fields of synthetic and pharmaceutical chemistry,and extends the scope of the still limited sulfonium salt photochemistry.展开更多
The titled complex has been synthesized by the reaction of sodium sulfo-salicylate with lanthanum and yttrium perchlorate. The crystal structure has been determined by single crystal X-ray diffractometry. The crystal ...The titled complex has been synthesized by the reaction of sodium sulfo-salicylate with lanthanum and yttrium perchlorate. The crystal structure has been determined by single crystal X-ray diffractometry. The crystal is monoclinic with space group C2/c. The unit cell parameters are as follows: a=16.289(8), b=18.323(8), c=22.044(8) A, β=106.34(2)°, V=6314(6) A3, Z=4 and Dc=1.764 g/cm3. The structure was solved by direct method. The least-square refinement based on 3776 observed reflections [F > 6σ(F)] converged to a final R=8.6% and F(000) is 3548. Yttrium ion with eight-coordinate is located in central of the molecule, the two lanthanum ions with ten-coordinate are located at the two sides of yttrium ion. There are two positions for Na in the molecule, one is in the C2 axis with six coordinate, the other one is in a general position with five-coordinate.展开更多
Biocompatibility,particularly blood compatibility is the most important property required for biomedical materials.The improvement of blood compatibility is always an important research task for biomaterial research a...Biocompatibility,particularly blood compatibility is the most important property required for biomedical materials.The improvement of blood compatibility is always an important research task for biomaterial research and development.It is an important way to develop biomaterials by constructing special molecules onto the proper mechanical material surface.Polyetherurethanes are widely used as biomaterials due to their good biocompatibility and mechanical properties.Nevertheless,their blood compatibility is still not adequate for the more demanding applications.The purpose of present study was to synthesis a novel nonthrombogenic biomaterial by modifying the surface of polyetherurethane.Ozone was used to introduce active peroxide groups onto polyetherurethane surface and graft polymerization of N,N dimethyl N methacryloxyethyl N (3 sulfopropyl) ammonium (DMMSA), a sulfobetaine structure,onto the ozone activated polyetherurethane surface was conducted.The nonthrombogenic properties of grafted film were also studied.The grafted film was characterized by ATR FTIR,XPS and contact angle measurement.The ATR FTIR,XPS of the grafted PU film indicated that the graft polymerization did take place,the grafted PU film surface was covered with the DMMSA polymer.The grafting yields in different condition were studied.The grafting yields increased with the increase of the monomer concentration.Water absorption and contact angle showed that the hydrophilicity of the film had been improved greatly,and the hydrophilicity of the film increased with the grafting yield.The blood compatibility of the grafted films was evaluated by platelet adhesion in platelet rich plasma and scanning electron microscopy observation using PU film as the reference.No platelet adhesion was observed for the grafted films incubated for 60 min and 180 min,however,the ungrafted PU film was covered with platelet.The result of platelet adhesion experiment indicated that the PDMMSA chains could prevent platelet adhesion.That means this new material is expected to have potential biomedical applications.展开更多
基金This work was supported by the NNSFC (No. 20471008)
文摘The title compound （C12H15NO13S, Mr = 413.31） was synthesized by the nitration of napthalene-1,4-dicarboxylate acid in mixed nitric and sulfuric acids. It crystallizes in monoclinic, space group P2 1/c with a = 8.100（1）, b = 24.369（3）, c = 8.634（1） A, β = 105.380（2）°, V = 1643.1（4） A^3, Z = 4, Dc = 1.671 g/cm^3, F（000） = 856, μ（MoKa） = 0.273 mm^- 1, T = 294（2） K, the final R = 0.0400 and wR = 0.1021 for 2866 observed reflections with I 〉 2σ（I）. In this crystal there exist a number of H-bonds which link the molecules to form a three-dimensional infinite network structure. The thermal decomposition of the title compound was investigated by using TG-DTG and DSC techniques.
基金financially supported by the National Natural Science Foundation of China (Nos.51275509 and 51175491)
文摘Cu2ZnSn（S,Se）4（CZTSSe） thin film was prepared using a simple two-step approach based on the single-source evaporation and synchronous sulfo-selenization.Composition,microstructure,morphology,and properties of the asprepared CZTSSe thin films were investigated.XRD and Raman patterns confirmed the formation of single-phase CZTSSe solid solutions.SEM results showed that the CZTSSe thin film had a uniform morphology and large grains.EDS results revealed the composition of CZTSSe film was Cu：Zn：Sn：S：Se = 23.7：12.6：12.2：37.7：13.8（in at%）,which was in accordance with the stoichiometric Cu2ZnSn（S,Se）4.The optical band gap of CZTSSe thin film evaluated from its UV–Vis spectrum was 1.33 eV.The resistivity,carrier concentration,and mobility were 0.53 X cm,7.9 9 1018cm3,and 7.5 cm2/（Vs）,respectively.
基金supported by the Natural Science Foundation of Shandong Province(ZR2016JL012,ZR2020JQ07)the Scientific Research Foundation of Qingdao University of Science and Technology(1203043003457).
文摘The development of new versatile alkylation reagents that can be transformed from diverse available chemical raw materials is highly desirable.Here,an efficient,metal-free organic photoredox-catalyzed direct alkylation of heteroarenes via a desulphurization strategy using alkylsulfonium salts as alkylation reagents under mild conditions has been described for the first time.The inexpensive and efficient organic photoredox-catalyzed method offers a new and useful strategy for constructing various biologically interesting heteroarenes in the fields of synthetic and pharmaceutical chemistry,and extends the scope of the still limited sulfonium salt photochemistry.
基金supported by the National Natural Science Foundation of China and Laboratory of Rare Earth Chemistry and Physics,Changchun Institute of Applied Chemistry,Chinese Academy of Sciences.
文摘The titled complex has been synthesized by the reaction of sodium sulfo-salicylate with lanthanum and yttrium perchlorate. The crystal structure has been determined by single crystal X-ray diffractometry. The crystal is monoclinic with space group C2/c. The unit cell parameters are as follows: a=16.289(8), b=18.323(8), c=22.044(8) A, β=106.34(2)°, V=6314(6) A3, Z=4 and Dc=1.764 g/cm3. The structure was solved by direct method. The least-square refinement based on 3776 observed reflections [F > 6σ(F)] converged to a final R=8.6% and F(000) is 3548. Yttrium ion with eight-coordinate is located in central of the molecule, the two lanthanum ions with ten-coordinate are located at the two sides of yttrium ion. There are two positions for Na in the molecule, one is in the C2 axis with six coordinate, the other one is in a general position with five-coordinate.
文摘Biocompatibility,particularly blood compatibility is the most important property required for biomedical materials.The improvement of blood compatibility is always an important research task for biomaterial research and development.It is an important way to develop biomaterials by constructing special molecules onto the proper mechanical material surface.Polyetherurethanes are widely used as biomaterials due to their good biocompatibility and mechanical properties.Nevertheless,their blood compatibility is still not adequate for the more demanding applications.The purpose of present study was to synthesis a novel nonthrombogenic biomaterial by modifying the surface of polyetherurethane.Ozone was used to introduce active peroxide groups onto polyetherurethane surface and graft polymerization of N,N dimethyl N methacryloxyethyl N (3 sulfopropyl) ammonium (DMMSA), a sulfobetaine structure,onto the ozone activated polyetherurethane surface was conducted.The nonthrombogenic properties of grafted film were also studied.The grafted film was characterized by ATR FTIR,XPS and contact angle measurement.The ATR FTIR,XPS of the grafted PU film indicated that the graft polymerization did take place,the grafted PU film surface was covered with the DMMSA polymer.The grafting yields in different condition were studied.The grafting yields increased with the increase of the monomer concentration.Water absorption and contact angle showed that the hydrophilicity of the film had been improved greatly,and the hydrophilicity of the film increased with the grafting yield.The blood compatibility of the grafted films was evaluated by platelet adhesion in platelet rich plasma and scanning electron microscopy observation using PU film as the reference.No platelet adhesion was observed for the grafted films incubated for 60 min and 180 min,however,the ungrafted PU film was covered with platelet.The result of platelet adhesion experiment indicated that the PDMMSA chains could prevent platelet adhesion.That means this new material is expected to have potential biomedical applications.
