Three zincand cobaltcoordination polymers,namely{[Zn_(2)(μ_(6)-adip)(phen)_(2)]·4H_(2)O}_(n)(1),{[Co_(2)(μ_(6)-adip)(bipy)_(2)]·4H_(2)O}_(n)(2),and[Co_(2)(μ4-adip)(μ-bpa)_(2)]_(n)(3)h...Three zincand cobaltcoordination polymers,namely{[Zn_(2)(μ_(6)-adip)(phen)_(2)]·4H_(2)O}_(n)(1),{[Co_(2)(μ_(6)-adip)(bipy)_(2)]·4H_(2)O}_(n)(2),and[Co_(2)(μ4-adip)(μ-bpa)_(2)]_(n)(3)have been constructed hydrothermally using H4adip(H4adip=5,5′-azanediyldiisophthalic acid),phen(phen=1,10-phenanthroline),bipy(bipy=2,2′-bipyridine),bpa(bpa=bis(4-pyridyl)amine),and zinc and cobalt chlorides at 160℃.The products were isolated as stable crystalline solids and were characterized by IR spectra,elemental analyses,thermogravimetric analyses,and single-crystal X-ray diffrac-tion analyses.Single-crystal X-ray diffraction analyses revealed that three compounds crystallize in the orthorhom-bic system Pnna(1 and 2)or P21212(3)space groups.All compounds exhibit 3D frameworks.The catalytic perfor-mances in the Henry reaction of these compounds were investigated.Compound 3 exhibited an effective catalytic activity in the Henry reaction at 70℃.CCDC:2339391,1;2339392,2;2339393,3.展开更多
Three zinc(Ⅱ),cobalt(Ⅱ),and nickel(Ⅱ)coordination polymers,namely[Zn(μ^(3-)cpna)(μ-dpea)_(0.5)]_(n)(1),[Co(μ^(3-)cpna)(μ-dpey)_(0.5)]_(n)(2),and[Ni(μ^(3-)cpna)(μ-dpey)_(0.5)(H_(2)O)]_(n)(3),have been construc...Three zinc(Ⅱ),cobalt(Ⅱ),and nickel(Ⅱ)coordination polymers,namely[Zn(μ^(3-)cpna)(μ-dpea)_(0.5)]_(n)(1),[Co(μ^(3-)cpna)(μ-dpey)_(0.5)]_(n)(2),and[Ni(μ^(3-)cpna)(μ-dpey)_(0.5)(H_(2)O)]_(n)(3),have been constructed hydrothermally using H_(2)cpna(5-(4-carboxyphenoxy)nicotinic acid),dpea(1,2-di(4-pyridyl)ethane),dpey(1,2-di(4-pyridyl)ethylene),and zinc,cobalt,and nickel chlorides at 160℃.The products were isolated as stable crystalline solids and were characterized by IR spectra,elemental analyses,thermogravimetric analyses,and single-crystal X-ray diffraction analyses.Single-crystal X-ray diffraction analyses revealed that three compounds crystallize in the triclinic system,space group P1.Compounds 1-3 show 2D layer structures.The catalytic activities in the Knoevenagel condensation reaction of these compounds were investigated.Compounds 1 and 2 exhibit effective catalytic activities in the Knoevenagel condensa-tion reaction at room temperature.For this reaction,various parameters were optimized,followed by the investiga-tion of the substrate scope.CCDC:2335676,1;2335677,2;2335678,3.展开更多
A strong hydrogen-bond acidic(HBA)polymer linear fluoroalcoholic polysiloxane(PLF),synthesized by one-step hydrosilylation,was introduced for 2,4-dinitrotoluene(2,4-DNT)detection using surface acoustic wave(SAW)device...A strong hydrogen-bond acidic(HBA)polymer linear fluoroalcoholic polysiloxane(PLF),synthesized by one-step hydrosilylation,was introduced for 2,4-dinitrotoluene(2,4-DNT)detection using surface acoustic wave(SAW)devices.FT-IR spectra and1H NMR spectra characterizations confirmed its molecular structure.Then,PLF was dissolved in chloroform,and spray coated onto a434 MHz SAW device.And subsequently,the sensitivity and selectivity of the fabricated sensor were studied based on a SAW test platform.To 2,4-DNT of 1 ppm and 100 ppb(for DNT,1 ppm=8.1 mg/m3;1 ppb=8.1 lg/m3),the responses of the sensor rose 7.7 and 1.5 kHz,respectively.Furthermore,compared with some common interference vapors at 10 mg/m3,the response of the sensor to 2,4-DNT at1 ppm was 5 times stronger.The sensitive property was attributed to the hydrogen bond interaction between the hexafluoroisopropanol(HFIP)group in PLF and the basic lone electron pairs of nitro-groups in 2,4-DNT.Comparison between the PLF sensor and hydroxyl group functionalized polymer(carbowax and MOBCD)-coated sensors was investigated,and the results showed that the PLF sensor exhibited better sensitivity.In a word,the PLF sensor exhibited fast response,negligible baseline drifts and excellent reversibility,indicating good candidates of HFIP group functionalized HBA polymers for practical nitroaromatic explosives detection.展开更多
文摘Three zincand cobaltcoordination polymers,namely{[Zn_(2)(μ_(6)-adip)(phen)_(2)]·4H_(2)O}_(n)(1),{[Co_(2)(μ_(6)-adip)(bipy)_(2)]·4H_(2)O}_(n)(2),and[Co_(2)(μ4-adip)(μ-bpa)_(2)]_(n)(3)have been constructed hydrothermally using H4adip(H4adip=5,5′-azanediyldiisophthalic acid),phen(phen=1,10-phenanthroline),bipy(bipy=2,2′-bipyridine),bpa(bpa=bis(4-pyridyl)amine),and zinc and cobalt chlorides at 160℃.The products were isolated as stable crystalline solids and were characterized by IR spectra,elemental analyses,thermogravimetric analyses,and single-crystal X-ray diffrac-tion analyses.Single-crystal X-ray diffraction analyses revealed that three compounds crystallize in the orthorhom-bic system Pnna(1 and 2)or P21212(3)space groups.All compounds exhibit 3D frameworks.The catalytic perfor-mances in the Henry reaction of these compounds were investigated.Compound 3 exhibited an effective catalytic activity in the Henry reaction at 70℃.CCDC:2339391,1;2339392,2;2339393,3.
文摘Three zinc(Ⅱ),cobalt(Ⅱ),and nickel(Ⅱ)coordination polymers,namely[Zn(μ^(3-)cpna)(μ-dpea)_(0.5)]_(n)(1),[Co(μ^(3-)cpna)(μ-dpey)_(0.5)]_(n)(2),and[Ni(μ^(3-)cpna)(μ-dpey)_(0.5)(H_(2)O)]_(n)(3),have been constructed hydrothermally using H_(2)cpna(5-(4-carboxyphenoxy)nicotinic acid),dpea(1,2-di(4-pyridyl)ethane),dpey(1,2-di(4-pyridyl)ethylene),and zinc,cobalt,and nickel chlorides at 160℃.The products were isolated as stable crystalline solids and were characterized by IR spectra,elemental analyses,thermogravimetric analyses,and single-crystal X-ray diffraction analyses.Single-crystal X-ray diffraction analyses revealed that three compounds crystallize in the triclinic system,space group P1.Compounds 1-3 show 2D layer structures.The catalytic activities in the Knoevenagel condensation reaction of these compounds were investigated.Compounds 1 and 2 exhibit effective catalytic activities in the Knoevenagel condensa-tion reaction at room temperature.For this reaction,various parameters were optimized,followed by the investiga-tion of the substrate scope.CCDC:2335676,1;2335677,2;2335678,3.
基金supported by the National High Technology Research & Development Program of China (2014AA063010)the Specialized Research Fund for the Doctoral Program of Higher Education (20130185110017)the National Natural Science Foundation of China (61176066 and 61101031)
文摘A strong hydrogen-bond acidic(HBA)polymer linear fluoroalcoholic polysiloxane(PLF),synthesized by one-step hydrosilylation,was introduced for 2,4-dinitrotoluene(2,4-DNT)detection using surface acoustic wave(SAW)devices.FT-IR spectra and1H NMR spectra characterizations confirmed its molecular structure.Then,PLF was dissolved in chloroform,and spray coated onto a434 MHz SAW device.And subsequently,the sensitivity and selectivity of the fabricated sensor were studied based on a SAW test platform.To 2,4-DNT of 1 ppm and 100 ppb(for DNT,1 ppm=8.1 mg/m3;1 ppb=8.1 lg/m3),the responses of the sensor rose 7.7 and 1.5 kHz,respectively.Furthermore,compared with some common interference vapors at 10 mg/m3,the response of the sensor to 2,4-DNT at1 ppm was 5 times stronger.The sensitive property was attributed to the hydrogen bond interaction between the hexafluoroisopropanol(HFIP)group in PLF and the basic lone electron pairs of nitro-groups in 2,4-DNT.Comparison between the PLF sensor and hydroxyl group functionalized polymer(carbowax and MOBCD)-coated sensors was investigated,and the results showed that the PLF sensor exhibited better sensitivity.In a word,the PLF sensor exhibited fast response,negligible baseline drifts and excellent reversibility,indicating good candidates of HFIP group functionalized HBA polymers for practical nitroaromatic explosives detection.
