The organic dissolvent （di-n-butyl phthalate） needs to be washed by water to recycle itself in the process of recovering maleic anhydride by organic dissolvent. The design and optimization of the extraction process ...The organic dissolvent （di-n-butyl phthalate） needs to be washed by water to recycle itself in the process of recovering maleic anhydride by organic dissolvent. The design and optimization of the extraction process require the distribution coefficients of the organic solutes, o-phthalic acid and trans-butenedioic in water and di-n-butyl phthalate, on which the extraction efficiency depends. In this study, the distribution coefficients of o-phthalic acid and trans-butenedioic in water and all-n-butyl phthalate（DBP） at 298.15 K, 318.15 K and 333.15 K were determined respectively by acid-alkali titration. The dissociation constants of o-phthalic acid and trans-butenedioic at those temperatures were obtained by fitting the measured hydrogen-ion concentrations and the known solute concentrations in the aqueous solution containing the two organic solutes. Then the distribution constants were calculated. Both the distribution coefficients and the distribution constants increase along with the temperature increasing. And the distribution coefficients at 333. 15 K are large enough to ensure the efficiency of extraction process. In addition, the mutual solubility of water and all-n-butyl phthalate at 298.1.5 K, 318. 1.5 K and 333. 15 K was also measured respectively by High Performance Liquid Chromatography and Karl Fischer Watertitration, which was not more than 0. 5%（ mass fraction ）.展开更多
The reaction of zinc carbonate with o-phthalic acid and imidazole in an aqueous-alcohol solution led to the formation of colorless crystals of [Zn(-phth)(imi)2]∞. Single-crystal X-ray analysis has revealed that the c...The reaction of zinc carbonate with o-phthalic acid and imidazole in an aqueous-alcohol solution led to the formation of colorless crystals of [Zn(-phth)(imi)2]∞. Single-crystal X-ray analysis has revealed that the complex crystallizes in a monoclinic system, space group Pn with a = 8.394(2), b = 9.976(3), c = 9.959(3) ? ?= 104.409(4)? V = 807.6(4) ?, Z = 2, C14H12N4O4Zn, Mr = 365.65, Dc = 1.504 g/cm3, ?= 1.544 mm-1, F(000) = 372, the final R = 0.0466 and wR = 0.1171 for 1834 reflections with I >2(I). The complex displays a zigzag infinite chain structure in which each zinc (Ⅱ) center is coordinated by two oxygen atoms and two nitrogen atoms to generate a ZnN2O2 distorted tetrahedral geometry. The neighboring zinc atoms are bridged by the o-phthalate ligand. Each chain is linked by hydrogen bonds with its neighbors to form a three-dimensional coordination polymer.展开更多
A new cobalt(Ⅱ) complex [Co(-phth)(imi)2]n (phth = o-phthalato, imi = imidazole) has been synthesized by the reaction of CoCl2 with disodium o-phthalate and imidazole. The crystal structure of the compound has been d...A new cobalt(Ⅱ) complex [Co(-phth)(imi)2]n (phth = o-phthalato, imi = imidazole) has been synthesized by the reaction of CoCl2 with disodium o-phthalate and imidazole. The crystal structure of the compound has been determined by single-crystal X-ray diffraction. The crystal is of monoclinic system, space group Pn with a = 8.405(1), b = 9.995(1), c = 9.996(2) ? b = 104.479(2), V = 813.0(2) ?, Dc = 1.467 g/cm3, C14H12N4O4Co, Mr = 359.21, F(000) = 366, m = 1.079 mm-1, Z = 2, R = 0.0483 and wR = 0.1209 for 1583 observed reflections (I > 2s(I)). In the title complex, the Co(Ⅱ) ions are bridged by o-phthalate ligands in a bidentate mode, producing a zigzag infinite chain structure. Each four-coordinated cobalt(Ⅱ) center was coordinated by two oxygen atoms and two nitrogen atoms to give a distorted tetrahedral geometry. The chains are linked by hydrogen bonds between oxygen atoms belonging to carboxylate groups and hydrogen atoms of imidazole molecules, forming an unusual two-dimensional coordination polymer.展开更多
A new Gd（Ⅱ） complex [Gd2（μ-phth）3（b-pd）（H2O）5], （phth = o-phthalato, b-pd = N,Nbipyridine） has been ＇synthesized by the reaction of GdO2 with o-phthalate, H2O and 2,2＇-bipyridine. The crystal structure h...A new Gd（Ⅱ） complex [Gd2（μ-phth）3（b-pd）（H2O）5], （phth = o-phthalato, b-pd = N,Nbipyridine） has been ＇synthesized by the reaction of GdO2 with o-phthalate, H2O and 2,2＇-bipyridine. The crystal structure has been determined by single-crystal X-ray diffraction. The crystal is of triclinic, space group P1^- with a = 11.82920（10）, b = 13.53550（10）, c = 13.7381（2）A^°, α= 88.99,β= 66.9120（10）, γ = 66.2370（10）°, V = 1826.02（3） ,A^°3, Dc= 1.915 g/cm^3, C34H30N2O17Gd2, Mr= 1053.10, F（000） = 1024,μ = 3.680 mm^-1, Z = 2, R = 0.0612 and wR = 0.1320 for 6259 observed reflections （I〉 2σ（I））. In the title complex, the Gd（Ⅱ） ions are bridged by o-phthalate ligands in a bidentate mode, producing a 1D infinite chain structure. Each eight-coordinated Gd（Ⅱ） center is coordinated by eight oxygen atoms from phth to give a distorted dodecahedral geometry, and each nine-coordinated Gd（Ⅱ） center is coordinated by two N atoms from b-pd and seven oxygen atoms from phth to give a distorted geometry of capped square antiprism. The chains are linked by π-π interactions and hydrogen bonds between oxygen atoms of carboxylate groups and H2O molecules and hydrogen atoms of H2O, b-pd and o-phth molecules, forming an unusual three-dimensional coordination polymer.展开更多
One dinuclear manganese（II）complex [Mn2（C12H8N2）4（C8H5O4）2]（C8H4O4）·H2O has been synthesized with o-phthalic acid and 1,10-phenanthroline.The crystal structure was determined by X-ray diffraction.The crys...One dinuclear manganese（II）complex [Mn2（C12H8N2）4（C8H5O4）2]（C8H4O4）·H2O has been synthesized with o-phthalic acid and 1,10-phenanthroline.The crystal structure was determined by X-ray diffraction.The crystal belongs to the triclinic system,space group P1 with a = 1.17767（3）,b = 1.22292（2）,c = 1.35860（3）nm,α = 110.5300（10）,β = 97.6140（10）,γ = 93.7300（10）o,V = 1.80307（7）nm3,Dc = 1.404 g/cm3,Z = 2,F（000）= 784,the final GOOF = 1.047,R = 0.0398 and wR = 0.1038.The crystal structure of the title complex consists of one [Mn2（C12H8N2）4（C8H5O4）2]2＋ cation,one uncoordinate o-phthalate anion（C8H4O4）2-and one uncoordinate water molecule.In [Mn2（C12H8N2）4（C8H5O4）2]2＋,the central Mn（II）ion is coordinated by four nitrogen atoms and two oxygen atoms to give a distorted octahedral coordination geometry.The electrochemical property of the title complex was also studied.展开更多
O-phthalic acid is a kind of important pollutant, which accumulates in the environment with the extensive use of plastics and other products. Meanwhile, phthalic acid is one of the high content of allelopathic autotox...O-phthalic acid is a kind of important pollutant, which accumulates in the environment with the extensive use of plastics and other products. Meanwhile, phthalic acid is one of the high content of allelopathic autotoxic substances secreted by tobacco. The accumulation of phthalic acid in soil is an important cause of tobacco continuous cropping effect. In order to degrade phthalic acid accumulated in environment, the barrier effect of tobacco continuous cropping caused by phthalic acid accumulation in soil can be removed. A strain capable of degrading phthalic acid was isolated from sludge of sewage treatment plant and compared with 16 s DNA. The homology between this strain and Enterobacter sp. is 99%. The optimum growth conditions are as follows: pH7 at 30°C, 500 mg/L of o-phthalic acid, inoculation concentration ≥ 1.2% and its highest degradation rate of o-phthalic acid is 74%. The results of pot experiment showed that the degradation efficiency of o-phthalic acid in soil was about 40%, which alleviated the inhibitory effect of o-phthalic acid accumulation on tobacco growth.展开更多
The metabolic pathway of phenanthrene-degrading strain Agrobacterium sp. Phx1 was investigated. Phx1 almost was able to transform 100 υg/mL of phenanthrene completely in 1 day in broth media of beef extract-peptone (...The metabolic pathway of phenanthrene-degrading strain Agrobacterium sp. Phx1 was investigated. Phx1 almost was able to transform 100 υg/mL of phenanthrene completely in 1 day in broth media of beef extract-peptone (BP), Luria-Bertani (LB) and mineral salts media (MS), and LB and BP could promote the growth and degradation efficiency of Phx1. The GC-MS was employed to analyze the metabolites of the 1st, 3rd, 7th days of phenanthrene degradation in MS. As a result, the 1-Hydroxy-2-naphthoic acid (1H2N) and 1-naphthol (NOL) were detected in the metabolites of the 1st day. Only NOL was observed on the 3rd day and it disappeared on the 7th day. The accumulated NOL did not pertain to the defined pathway of phenanthrene degradation by bacteria. The further HPLC study confirmed the finding in GC-MS analysis and found the production of catechol (CAT) from o-phthalic acid (OPA) in the phenanthrene metabolizing, which has never been reported in the defined degrading pathways. This production was also evidenced by the production of CAT using OPA as substrate. All of our results showed that the Agrobacterium sp. Phx1 had a novel phenanthrene-degrading pathway.展开更多
基金Supported by Tianjin Chemical Engineering Design Institute (No.G203051).
文摘The organic dissolvent （di-n-butyl phthalate） needs to be washed by water to recycle itself in the process of recovering maleic anhydride by organic dissolvent. The design and optimization of the extraction process require the distribution coefficients of the organic solutes, o-phthalic acid and trans-butenedioic in water and di-n-butyl phthalate, on which the extraction efficiency depends. In this study, the distribution coefficients of o-phthalic acid and trans-butenedioic in water and all-n-butyl phthalate（DBP） at 298.15 K, 318.15 K and 333.15 K were determined respectively by acid-alkali titration. The dissociation constants of o-phthalic acid and trans-butenedioic at those temperatures were obtained by fitting the measured hydrogen-ion concentrations and the known solute concentrations in the aqueous solution containing the two organic solutes. Then the distribution constants were calculated. Both the distribution coefficients and the distribution constants increase along with the temperature increasing. And the distribution coefficients at 333. 15 K are large enough to ensure the efficiency of extraction process. In addition, the mutual solubility of water and all-n-butyl phthalate at 298.1.5 K, 318. 1.5 K and 333. 15 K was also measured respectively by High Performance Liquid Chromatography and Karl Fischer Watertitration, which was not more than 0. 5%（ mass fraction ）.
基金Supported by the National Natural Science Foundation of China (29872037) and the Natural Science Foundation of Fujian province (C0120002)
文摘The reaction of zinc carbonate with o-phthalic acid and imidazole in an aqueous-alcohol solution led to the formation of colorless crystals of [Zn(-phth)(imi)2]∞. Single-crystal X-ray analysis has revealed that the complex crystallizes in a monoclinic system, space group Pn with a = 8.394(2), b = 9.976(3), c = 9.959(3) ? ?= 104.409(4)? V = 807.6(4) ?, Z = 2, C14H12N4O4Zn, Mr = 365.65, Dc = 1.504 g/cm3, ?= 1.544 mm-1, F(000) = 372, the final R = 0.0466 and wR = 0.1171 for 1834 reflections with I >2(I). The complex displays a zigzag infinite chain structure in which each zinc (Ⅱ) center is coordinated by two oxygen atoms and two nitrogen atoms to generate a ZnN2O2 distorted tetrahedral geometry. The neighboring zinc atoms are bridged by the o-phthalate ligand. Each chain is linked by hydrogen bonds with its neighbors to form a three-dimensional coordination polymer.
基金Supported by the National Natural Science Foundation of China (29872037)the Natural Science Foundation of Fujian province (C0120002)
文摘A new cobalt(Ⅱ) complex [Co(-phth)(imi)2]n (phth = o-phthalato, imi = imidazole) has been synthesized by the reaction of CoCl2 with disodium o-phthalate and imidazole. The crystal structure of the compound has been determined by single-crystal X-ray diffraction. The crystal is of monoclinic system, space group Pn with a = 8.405(1), b = 9.995(1), c = 9.996(2) ? b = 104.479(2), V = 813.0(2) ?, Dc = 1.467 g/cm3, C14H12N4O4Co, Mr = 359.21, F(000) = 366, m = 1.079 mm-1, Z = 2, R = 0.0483 and wR = 0.1209 for 1583 observed reflections (I > 2s(I)). In the title complex, the Co(Ⅱ) ions are bridged by o-phthalate ligands in a bidentate mode, producing a zigzag infinite chain structure. Each four-coordinated cobalt(Ⅱ) center was coordinated by two oxygen atoms and two nitrogen atoms to give a distorted tetrahedral geometry. The chains are linked by hydrogen bonds between oxygen atoms belonging to carboxylate groups and hydrogen atoms of imidazole molecules, forming an unusual two-dimensional coordination polymer.
基金This work was supported by National Natural Science Foundation of China (20472085)
文摘A new Gd（Ⅱ） complex [Gd2（μ-phth）3（b-pd）（H2O）5], （phth = o-phthalato, b-pd = N,Nbipyridine） has been ＇synthesized by the reaction of GdO2 with o-phthalate, H2O and 2,2＇-bipyridine. The crystal structure has been determined by single-crystal X-ray diffraction. The crystal is of triclinic, space group P1^- with a = 11.82920（10）, b = 13.53550（10）, c = 13.7381（2）A^°, α= 88.99,β= 66.9120（10）, γ = 66.2370（10）°, V = 1826.02（3） ,A^°3, Dc= 1.915 g/cm^3, C34H30N2O17Gd2, Mr= 1053.10, F（000） = 1024,μ = 3.680 mm^-1, Z = 2, R = 0.0612 and wR = 0.1320 for 6259 observed reflections （I〉 2σ（I））. In the title complex, the Gd（Ⅱ） ions are bridged by o-phthalate ligands in a bidentate mode, producing a 1D infinite chain structure. Each eight-coordinated Gd（Ⅱ） center is coordinated by eight oxygen atoms from phth to give a distorted dodecahedral geometry, and each nine-coordinated Gd（Ⅱ） center is coordinated by two N atoms from b-pd and seven oxygen atoms from phth to give a distorted geometry of capped square antiprism. The chains are linked by π-π interactions and hydrogen bonds between oxygen atoms of carboxylate groups and H2O molecules and hydrogen atoms of H2O, b-pd and o-phth molecules, forming an unusual three-dimensional coordination polymer.
基金Sponsored by the Scientific Research Fund of Hunan Provincial Education Department (B21018)the Construct Program of the Key Disciplines in Hunan Province
文摘One dinuclear manganese（II）complex [Mn2（C12H8N2）4（C8H5O4）2]（C8H4O4）·H2O has been synthesized with o-phthalic acid and 1,10-phenanthroline.The crystal structure was determined by X-ray diffraction.The crystal belongs to the triclinic system,space group P1 with a = 1.17767（3）,b = 1.22292（2）,c = 1.35860（3）nm,α = 110.5300（10）,β = 97.6140（10）,γ = 93.7300（10）o,V = 1.80307（7）nm3,Dc = 1.404 g/cm3,Z = 2,F（000）= 784,the final GOOF = 1.047,R = 0.0398 and wR = 0.1038.The crystal structure of the title complex consists of one [Mn2（C12H8N2）4（C8H5O4）2]2＋ cation,one uncoordinate o-phthalate anion（C8H4O4）2-and one uncoordinate water molecule.In [Mn2（C12H8N2）4（C8H5O4）2]2＋,the central Mn（II）ion is coordinated by four nitrogen atoms and two oxygen atoms to give a distorted octahedral coordination geometry.The electrochemical property of the title complex was also studied.
文摘O-phthalic acid is a kind of important pollutant, which accumulates in the environment with the extensive use of plastics and other products. Meanwhile, phthalic acid is one of the high content of allelopathic autotoxic substances secreted by tobacco. The accumulation of phthalic acid in soil is an important cause of tobacco continuous cropping effect. In order to degrade phthalic acid accumulated in environment, the barrier effect of tobacco continuous cropping caused by phthalic acid accumulation in soil can be removed. A strain capable of degrading phthalic acid was isolated from sludge of sewage treatment plant and compared with 16 s DNA. The homology between this strain and Enterobacter sp. is 99%. The optimum growth conditions are as follows: pH7 at 30°C, 500 mg/L of o-phthalic acid, inoculation concentration ≥ 1.2% and its highest degradation rate of o-phthalic acid is 74%. The results of pot experiment showed that the degradation efficiency of o-phthalic acid in soil was about 40%, which alleviated the inhibitory effect of o-phthalic acid accumulation on tobacco growth.
文摘The metabolic pathway of phenanthrene-degrading strain Agrobacterium sp. Phx1 was investigated. Phx1 almost was able to transform 100 υg/mL of phenanthrene completely in 1 day in broth media of beef extract-peptone (BP), Luria-Bertani (LB) and mineral salts media (MS), and LB and BP could promote the growth and degradation efficiency of Phx1. The GC-MS was employed to analyze the metabolites of the 1st, 3rd, 7th days of phenanthrene degradation in MS. As a result, the 1-Hydroxy-2-naphthoic acid (1H2N) and 1-naphthol (NOL) were detected in the metabolites of the 1st day. Only NOL was observed on the 3rd day and it disappeared on the 7th day. The accumulated NOL did not pertain to the defined pathway of phenanthrene degradation by bacteria. The further HPLC study confirmed the finding in GC-MS analysis and found the production of catechol (CAT) from o-phthalic acid (OPA) in the phenanthrene metabolizing, which has never been reported in the defined degrading pathways. This production was also evidenced by the production of CAT using OPA as substrate. All of our results showed that the Agrobacterium sp. Phx1 had a novel phenanthrene-degrading pathway.
