Based on the bent ligand 1 H-3-(3-pyridyl)-5-(4-pyridyl)-1,2,4-triazole(3,4?-Hbpt) with Co(Ⅱ) ions as well as a series of polycarboxylate co-ligands, three new coordination polymers were yielded, namely, {[Co(op)(3,4...Based on the bent ligand 1 H-3-(3-pyridyl)-5-(4-pyridyl)-1,2,4-triazole(3,4?-Hbpt) with Co(Ⅱ) ions as well as a series of polycarboxylate co-ligands, three new coordination polymers were yielded, namely, {[Co(op)(3,4?-Hbpt)(H_2O)_3]?2 H_2O}n(1), [Co(cyc)(3,4′-Hbpt)(H_2O)]n(2) and [Co(pro)(3,4′-Hbpt)(H_2O)]n(3)(here, op = o-phthalic anion, cyc = 1,1-cyclobutanedicarboxylic anion, pro = propanedioic anion). In cooperation with the auxiliary polycarboxylate co-ligands, a variety of Co(Ⅱ) coordination networks, such as 1-D chain 1 and 2-D layer 2 and 3 have been assembled. The magnetic behaviors of compounds 1～3 were studied. All of them indicated the existence of interesting spin-canting behavior.展开更多
We report here a cocrystal with artesunate as the active pharmaceutical ingredient(API)and a pharmaceutical intermediate 4,4?-bipyridine as the cocrystal former(CCF).The analysis of single-crystal X-ray diffraction de...We report here a cocrystal with artesunate as the active pharmaceutical ingredient(API)and a pharmaceutical intermediate 4,4?-bipyridine as the cocrystal former(CCF).The analysis of single-crystal X-ray diffraction demonstrates that the eutectic structural unit consists of two artesunate molecules and one 4,4?-bipyridine molecule with their ratio to be 2:1.The carboxyl group on artesunate acts as a donor,and the acceptor is N on 4,4?-bipyridine,forming an O–H···N hydrogen bond.The appearance of new diffraction peaks in the X-ray powder diffraction pattern also indicates the formation of new phases.The PXRD results indicated a pure phase for the synthesized sample.The cocrystal is slightly soluble in water.Antimicrobial activities showed that the cocrystal displayed effective inhibition of different bacteria.展开更多
文摘污水处理效果及其运行能耗是城镇污水处理运行效能评估的主要依据。贵港市石卡镇污水处理厂采用生物膜法A2/O—化学除磷—膜过滤工艺,试运行期间的运行数据统计显示,该工艺出水CODCr、BOD5、TN和NH3-N分别在12、3、3和1 mg/L以下,污水处理比能耗为0.35 k Wh/m3,投加化学除磷剂后,出水SS与总磷分别低于10、0.5mg/L,出水达到了《城镇污水处理厂污染物排放标准》(GB 18918—2002)一级A标准,显示该工艺具有较好的运行处理效果及其较低的能耗。
基金The project was supported by the National Natural Science Foundation of China(21461003)the Guangxi Natural Science Foundation of China(2016GXNSFFA380010 and 2016GXNSFAA380206)the Project of Guangxi Education Department(KY2016LX235)
文摘Based on the bent ligand 1 H-3-(3-pyridyl)-5-(4-pyridyl)-1,2,4-triazole(3,4?-Hbpt) with Co(Ⅱ) ions as well as a series of polycarboxylate co-ligands, three new coordination polymers were yielded, namely, {[Co(op)(3,4?-Hbpt)(H_2O)_3]?2 H_2O}n(1), [Co(cyc)(3,4′-Hbpt)(H_2O)]n(2) and [Co(pro)(3,4′-Hbpt)(H_2O)]n(3)(here, op = o-phthalic anion, cyc = 1,1-cyclobutanedicarboxylic anion, pro = propanedioic anion). In cooperation with the auxiliary polycarboxylate co-ligands, a variety of Co(Ⅱ) coordination networks, such as 1-D chain 1 and 2-D layer 2 and 3 have been assembled. The magnetic behaviors of compounds 1～3 were studied. All of them indicated the existence of interesting spin-canting behavior.
基金supported by the National Natural Science Foundation of China(No.21861005)the Foundation of Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources(CMEMR2018-C15 and CMEMR2016-A11)。
文摘We report here a cocrystal with artesunate as the active pharmaceutical ingredient(API)and a pharmaceutical intermediate 4,4?-bipyridine as the cocrystal former(CCF).The analysis of single-crystal X-ray diffraction demonstrates that the eutectic structural unit consists of two artesunate molecules and one 4,4?-bipyridine molecule with their ratio to be 2:1.The carboxyl group on artesunate acts as a donor,and the acceptor is N on 4,4?-bipyridine,forming an O–H···N hydrogen bond.The appearance of new diffraction peaks in the X-ray powder diffraction pattern also indicates the formation of new phases.The PXRD results indicated a pure phase for the synthesized sample.The cocrystal is slightly soluble in water.Antimicrobial activities showed that the cocrystal displayed effective inhibition of different bacteria.
