Hydrophilic polyethersulfone (PES) hollow fiber membranes were prepared via non-solvent induced phase separation (NIPS) by addition of polymeric additives as a membrane modifying agent. The effect of the addition of h...Hydrophilic polyethersulfone (PES) hollow fiber membranes were prepared via non-solvent induced phase separation (NIPS) by addition of polymeric additives as a membrane modifying agent. The effect of the addition of hydrophilic surfactant Pluronic F127, Polyivinylpyrrolidone (PVP), and Tetronic 1307 on the performance of the final PES hollow-fiber membrane was investigated. The morphology of fabricated hollow fiber membrane observed by scanning electron microscopy (SEM) indicated that all of membrane had a skin layer on the surface and finger like macrovoid structure inside the hollow fiber. The addition of 5 wt% polymeric surfactant on the polymer solution results in membrane with improved length and number of macrovoid structure. Sponge formation both near inner surface and near outer surface of hollow fiber membrane was another impact of addition of polymeric additives, which is led to decrease of water permeability of these membrane. Water contact angle measurement was performed to investigate the hydrophilicity property of resulted membrane. It is confirmed that the modified PES hollow fiber membranes had lower water contact angle than that of the original membrane, which indicate that the modified PES membrane with additives has high hydrophilic.展开更多
In order to develop novel spirocyclic tetronic acid lead compounds,a series of new spirocyclic tetronic acid derivatives containing oxime ether moiety was synthesized and bioassayed.The stmctures of 16 target compound...In order to develop novel spirocyclic tetronic acid lead compounds,a series of new spirocyclic tetronic acid derivatives containing oxime ether moiety was synthesized and bioassayed.The stmctures of 16 target compounds were characterized by lH NMR spectra,13C NMR spectra and high-resolution mass spectrometer(HRMS).Preliminary bioassays indicated that most of the title compounds displayed excellent insecticidal activity against Aphis fabae and Nilapmyata lugens at 100 mg/L.In particular,compound 6k showed the similar activity(LC50=6.87 mg/L)against A.fabae as the spirotetramat(LC50=4.56 mg/L)and had better efIects(LC50=l.64 mg/L)against N.lugens in comparison with spirotetramat(LC5o=7.90 mg/L).The study showed that compound 6k exhibited more promising and broad-spectrum insecticide activity and may serve as a new insecticidal agent for sucking pests.展开更多
The title compound 2-oxo-3-phenyl-1-oxaspiro[4.5]dec-3-en-4-yl 4-chlorobenzoate 6 （C22H19ClO4, Mr = 382.82） has been synthesized by the condensation reaction of 4-hydroxy-3-phenyl-1-oxaspiro[4.5]dec-3-en-2-one 5 wit...The title compound 2-oxo-3-phenyl-1-oxaspiro[4.5]dec-3-en-4-yl 4-chlorobenzoate 6 （C22H19ClO4, Mr = 382.82） has been synthesized by the condensation reaction of 4-hydroxy-3-phenyl-1-oxaspiro[4.5]dec-3-en-2-one 5 with 4-chlorobenzoyl chloride, and its crystal structure was determined by single-crystal X-ray diffraction. The crystal belongs to the monoclinic system, space group P21/n with a = 10.6749（11）, b = 6.0573（7）, c = 29.680（2） A, β = 94.073（3）°, V= 1914.3（3） A^3, Z = 4, Dc = 1.328 g/cm^3, F（000） = 800, μ = 0.224 mm^-1, S = 1.003, the final R = 0.0605 and wR = 0.1500 for 1828 observed reflections with I〉 2σ（I） and 244 variable parameters. The crystal analysis shows that the molecular structure of the title compound has one planar furan ring, one chair conformation cyclohexane ring and two benzene rings. The furan and cyclohexane rings adopt whorl conformations.展开更多
The title compound mesityl acetic acid 3-mesityl-2-oxo-1-oxaspiro[4,4]non-3-en-4-yl ester （5, C28H32O4, Mr = 432.56）, as a spiromesifen derivative, has been synthesized by the conden- sation reaction of 2,4,6-trimet...The title compound mesityl acetic acid 3-mesityl-2-oxo-1-oxaspiro[4,4]non-3-en-4-yl ester （5, C28H32O4, Mr = 432.56）, as a spiromesifen derivative, has been synthesized by the conden- sation reaction of 2,4,6-trimethylphenylacetic chloride with 4-hydroxyl-3-mesityl-1-oxa-spiro[4,4]- non-3-en-2-one （4）, and its crystal structure was determined by single-crystal X-ray diffraction. The crystal belongs to the triclinic system, space group P1 with a = 7.9261（7）, b = 8.2802（8）, c = 18.7604（18） , α = 91.576（3）, β = 93.277（2）, γ = 95.306（12）o, V = 1223.3（2） 3, Z = 2, Dc = 1.174 g/cm3, F（000） = 464, μ = 0.077 mm–1, S = 1.001, the final R = 0.0624 and wR = 0.1415 for 2809 observed reflections with I 2σ（I） and 290 variable parameters. The crystal analysis results show that the five-membered cyclopentyl ring displays an envelope conformation with C（25） atom at the flap position, 0.537（3） out of the mean plane formed by the other four atoms. The dihedral angles between the two benzene and furan rings are 70.0（2） and 80.67（3）o, respectively.展开更多
文摘Hydrophilic polyethersulfone (PES) hollow fiber membranes were prepared via non-solvent induced phase separation (NIPS) by addition of polymeric additives as a membrane modifying agent. The effect of the addition of hydrophilic surfactant Pluronic F127, Polyivinylpyrrolidone (PVP), and Tetronic 1307 on the performance of the final PES hollow-fiber membrane was investigated. The morphology of fabricated hollow fiber membrane observed by scanning electron microscopy (SEM) indicated that all of membrane had a skin layer on the surface and finger like macrovoid structure inside the hollow fiber. The addition of 5 wt% polymeric surfactant on the polymer solution results in membrane with improved length and number of macrovoid structure. Sponge formation both near inner surface and near outer surface of hollow fiber membrane was another impact of addition of polymeric additives, which is led to decrease of water permeability of these membrane. Water contact angle measurement was performed to investigate the hydrophilicity property of resulted membrane. It is confirmed that the modified PES hollow fiber membranes had lower water contact angle than that of the original membrane, which indicate that the modified PES membrane with additives has high hydrophilic.
基金Supported by the National Key Research&Development Program of China(No.2017YFDO2OO5O5)the Natural Science Foundation of Zhejiang Province,China(No.LY 19C140006).
文摘In order to develop novel spirocyclic tetronic acid lead compounds,a series of new spirocyclic tetronic acid derivatives containing oxime ether moiety was synthesized and bioassayed.The stmctures of 16 target compounds were characterized by lH NMR spectra,13C NMR spectra and high-resolution mass spectrometer(HRMS).Preliminary bioassays indicated that most of the title compounds displayed excellent insecticidal activity against Aphis fabae and Nilapmyata lugens at 100 mg/L.In particular,compound 6k showed the similar activity(LC50=6.87 mg/L)against A.fabae as the spirotetramat(LC50=4.56 mg/L)and had better efIects(LC50=l.64 mg/L)against N.lugens in comparison with spirotetramat(LC5o=7.90 mg/L).The study showed that compound 6k exhibited more promising and broad-spectrum insecticide activity and may serve as a new insecticidal agent for sucking pests.
基金Supported by the National Natural Science Foundation of China (Nos. 31101470 and 30700532)
文摘The title compound 2-oxo-3-phenyl-1-oxaspiro[4.5]dec-3-en-4-yl 4-chlorobenzoate 6 （C22H19ClO4, Mr = 382.82） has been synthesized by the condensation reaction of 4-hydroxy-3-phenyl-1-oxaspiro[4.5]dec-3-en-2-one 5 with 4-chlorobenzoyl chloride, and its crystal structure was determined by single-crystal X-ray diffraction. The crystal belongs to the monoclinic system, space group P21/n with a = 10.6749（11）, b = 6.0573（7）, c = 29.680（2） A, β = 94.073（3）°, V= 1914.3（3） A^3, Z = 4, Dc = 1.328 g/cm^3, F（000） = 800, μ = 0.224 mm^-1, S = 1.003, the final R = 0.0605 and wR = 0.1500 for 1828 observed reflections with I〉 2σ（I） and 244 variable parameters. The crystal analysis shows that the molecular structure of the title compound has one planar furan ring, one chair conformation cyclohexane ring and two benzene rings. The furan and cyclohexane rings adopt whorl conformations.
基金Supported by the Natural Science Foundation of Zhejiang Province (2008C21029)
文摘The title compound mesityl acetic acid 3-mesityl-2-oxo-1-oxaspiro[4,4]non-3-en-4-yl ester （5, C28H32O4, Mr = 432.56）, as a spiromesifen derivative, has been synthesized by the conden- sation reaction of 2,4,6-trimethylphenylacetic chloride with 4-hydroxyl-3-mesityl-1-oxa-spiro[4,4]- non-3-en-2-one （4）, and its crystal structure was determined by single-crystal X-ray diffraction. The crystal belongs to the triclinic system, space group P1 with a = 7.9261（7）, b = 8.2802（8）, c = 18.7604（18） , α = 91.576（3）, β = 93.277（2）, γ = 95.306（12）o, V = 1223.3（2） 3, Z = 2, Dc = 1.174 g/cm3, F（000） = 464, μ = 0.077 mm–1, S = 1.001, the final R = 0.0624 and wR = 0.1415 for 2809 observed reflections with I 2σ（I） and 290 variable parameters. The crystal analysis results show that the five-membered cyclopentyl ring displays an envelope conformation with C（25） atom at the flap position, 0.537（3） out of the mean plane formed by the other four atoms. The dihedral angles between the two benzene and furan rings are 70.0（2） and 80.67（3）o, respectively.
