A new zinc coordination polymer, [Zn2（bpp）（tpa）2H2O] 1 （bpp=1,3-bis（4-pyridyl）-propane and tpa=terephthalate） has been hydrothermally synthesized and characterized by elemental analysis, IR and single-crystal ...A new zinc coordination polymer, [Zn2（bpp）（tpa）2H2O] 1 （bpp=1,3-bis（4-pyridyl）-propane and tpa=terephthalate） has been hydrothermally synthesized and characterized by elemental analysis, IR and single-crystal X-ray diffraction. X-ray crystal structure analysis reveals that complex 1 crystallizes in monoclinic, space group P2/c with a=18.348（2）, b=10.9080（14）, c=13.7924（18）, β=98.156（2）°, V=2732.5（6）3 , Z=4, C29H24N2O9Zn2 , Mr=675.24, Z=4, F（000）=1376, Dc=1.641 mg/m3 , μ=1.815 mm-1 , the final R=0.0443 and wR=0.0769 for 2715 observed reflections （I〉2σ（I））. The title complex exhibits a two-dimensional （4, 4） sheet structure which is further stacked through face-to-face π-π interactions between the monodentately coordinated pyridine ring of bpp ligand and the phenyl ring of terephthalate ligand to form a 3-dimensional supramolecular structure. Thermogravimetric analyses show that the host framework of the complex is thermally stable up to ca. 400 ℃.展开更多
Nineteen L-N-2-hydroxyethylamino acids and L-N,N-bis(2-hydroxyethyl)amino acids were prepared from the reaction of chlorohydrin with L-alanine,L-valine,L-leucine,L-isoleucine,L- phenylalanine,L-serine,L-thrcunine,L-gl...Nineteen L-N-2-hydroxyethylamino acids and L-N,N-bis(2-hydroxyethyl)amino acids were prepared from the reaction of chlorohydrin with L-alanine,L-valine,L-leucine,L-isoleucine,L- phenylalanine,L-serine,L-thrcunine,L-glutamic acid,L-aspartic acid and glycine.L-N,N,N',N'-tetra (2-hydroxyethyl)cystine was prepared by the reaction of L-cystine with chlorohydrin.展开更多
Lithium aluminium amide [LiAI（NHR）4] 5 obtained by treating the primary amine 4 with LiAlH4 could promote the ring opening of epoxide 2 and led to high regioselective product of racemic bis[2-（6-fluoro-2-chromanyl...Lithium aluminium amide [LiAI（NHR）4] 5 obtained by treating the primary amine 4 with LiAlH4 could promote the ring opening of epoxide 2 and led to high regioselective product of racemic bis[2-（6-fluoro-2-chromanyl）-2-hydroxyethyl]amine methanesulfonic acid salt 7.展开更多
This work aimed at effectively utilizing the chemically depolymerized waste poly（ethylene terephthalate）（PET） fibers into useful products for the textile industry.PET fibers were glycolytically degraded by excess ...This work aimed at effectively utilizing the chemically depolymerized waste poly（ethylene terephthalate）（PET） fibers into useful products for the textile industry.PET fibers were glycolytically degraded by excess ethylene glycol as depolymerizing agent and zinc acetate dihydrate as catalyst.The glycolysis product,bis（2-hydroxyethyl） terephthalate（BHET）,was purified through repeated crystallization to get an average yield above 80%.Then,BHET was nitrated,reduced,and azotized to get diazonium salt.Finally,the produced diazonium salt was coupled with 1-（4-sulfophenyl）-3-methyl-5-pyrazolone to get azo dyestuff.The structures of BHET and azo dyestuff were identified by FT1 R and ^1H NMR spectra and elemental analysis.Nylon filaments dyed by the synthesized azo dyestuff with the dye bath pH from 4.14 to 5.88 showed bright yellow color.The performances of the dyestuff were described with dye uptake,color fastness,K/S,L^＊,a^＊,b^＊.and △E^＊ values.展开更多
以丙烯酸(AA)、丙烯酰胺(AM)、丙烯酸羟乙酯(HEMA)为单体、N,N′ 亚甲基双丙烯酰胺为交联剂、过硫酸铵/亚硫酸氢钠为氧化还原引发剂、Span80/Tween80为复合悬浮分散剂,采用反相悬浮聚合法合成了AA AM HEMA三元共聚高吸水性树脂。研究... 以丙烯酸(AA)、丙烯酰胺(AM)、丙烯酸羟乙酯(HEMA)为单体、N,N′ 亚甲基双丙烯酰胺为交联剂、过硫酸铵/亚硫酸氢钠为氧化还原引发剂、Span80/Tween80为复合悬浮分散剂,采用反相悬浮聚合法合成了AA AM HEMA三元共聚高吸水性树脂。研究了单体用量、分散剂用量、油水比和粒径等对树脂性能的影响。用TGA和DSC对树脂的保水性和脱水动力学进行了研究,IR分析证实所合成的树脂为丙烯酸-丙烯酰胺-丙烯酸羟乙酯三元共聚物。展开更多
基金supported by the Education Office of Anhui Province (No. 2011SQRL080)
文摘A new zinc coordination polymer, [Zn2（bpp）（tpa）2H2O] 1 （bpp=1,3-bis（4-pyridyl）-propane and tpa=terephthalate） has been hydrothermally synthesized and characterized by elemental analysis, IR and single-crystal X-ray diffraction. X-ray crystal structure analysis reveals that complex 1 crystallizes in monoclinic, space group P2/c with a=18.348（2）, b=10.9080（14）, c=13.7924（18）, β=98.156（2）°, V=2732.5（6）3 , Z=4, C29H24N2O9Zn2 , Mr=675.24, Z=4, F（000）=1376, Dc=1.641 mg/m3 , μ=1.815 mm-1 , the final R=0.0443 and wR=0.0769 for 2715 observed reflections （I〉2σ（I））. The title complex exhibits a two-dimensional （4, 4） sheet structure which is further stacked through face-to-face π-π interactions between the monodentately coordinated pyridine ring of bpp ligand and the phenyl ring of terephthalate ligand to form a 3-dimensional supramolecular structure. Thermogravimetric analyses show that the host framework of the complex is thermally stable up to ca. 400 ℃.
文摘Nineteen L-N-2-hydroxyethylamino acids and L-N,N-bis(2-hydroxyethyl)amino acids were prepared from the reaction of chlorohydrin with L-alanine,L-valine,L-leucine,L-isoleucine,L- phenylalanine,L-serine,L-thrcunine,L-glutamic acid,L-aspartic acid and glycine.L-N,N,N',N'-tetra (2-hydroxyethyl)cystine was prepared by the reaction of L-cystine with chlorohydrin.
基金the National 863 Program(No.2003AA323030)the National Natural Science Foundation of China(No.50272069 and No.20472090)for financial support.
文摘Lithium aluminium amide [LiAI（NHR）4] 5 obtained by treating the primary amine 4 with LiAlH4 could promote the ring opening of epoxide 2 and led to high regioselective product of racemic bis[2-（6-fluoro-2-chromanyl）-2-hydroxyethyl]amine methanesulfonic acid salt 7.
基金financially supported by the National High-tech R&D Program of China(863 Program,No.2012AA030313)the Open Project Program of Key Laboratory of Eco-Textiles(Jiangnan University),Ministry of Education,China(No.KLET1115)+1 种基金the Fundamental Research Funds for the Central Universities(No. JUSRP11201)the Cooperative Innovation Fund-Prospective Project of Jiangsu Province,China(No.BY2012060)
文摘This work aimed at effectively utilizing the chemically depolymerized waste poly（ethylene terephthalate）（PET） fibers into useful products for the textile industry.PET fibers were glycolytically degraded by excess ethylene glycol as depolymerizing agent and zinc acetate dihydrate as catalyst.The glycolysis product,bis（2-hydroxyethyl） terephthalate（BHET）,was purified through repeated crystallization to get an average yield above 80%.Then,BHET was nitrated,reduced,and azotized to get diazonium salt.Finally,the produced diazonium salt was coupled with 1-（4-sulfophenyl）-3-methyl-5-pyrazolone to get azo dyestuff.The structures of BHET and azo dyestuff were identified by FT1 R and ^1H NMR spectra and elemental analysis.Nylon filaments dyed by the synthesized azo dyestuff with the dye bath pH from 4.14 to 5.88 showed bright yellow color.The performances of the dyestuff were described with dye uptake,color fastness,K/S,L^＊,a^＊,b^＊.and △E^＊ values.
文摘 以丙烯酸(AA)、丙烯酰胺(AM)、丙烯酸羟乙酯(HEMA)为单体、N,N′ 亚甲基双丙烯酰胺为交联剂、过硫酸铵/亚硫酸氢钠为氧化还原引发剂、Span80/Tween80为复合悬浮分散剂,采用反相悬浮聚合法合成了AA AM HEMA三元共聚高吸水性树脂。研究了单体用量、分散剂用量、油水比和粒径等对树脂性能的影响。用TGA和DSC对树脂的保水性和脱水动力学进行了研究,IR分析证实所合成的树脂为丙烯酸-丙烯酰胺-丙烯酸羟乙酯三元共聚物。
