A novel dihydroxyl azacrown ether chitosan was synthesized by reacting dihydroxyl azacrown ether with epoxy activated chitosan. The adsorption property of the azacrown ether chitosan for Pb2+, Cr3+, and Ag+, were det...A novel dihydroxyl azacrown ether chitosan was synthesized by reacting dihydroxyl azacrown ether with epoxy activated chitosan. The adsorption property of the azacrown ether chitosan for Pb2+, Cr3+, and Ag+, were determined. The experimental results showed that the dihydroxyl azacrown ether grafted chitosan has high adsorption capacity and high selectivity for some metal ions.展开更多
The 6-hydroxymethyl-6'-tetrahydropyranyloxymethyl-2, 2'-bipyridine (2) was synthesized by the reaction of 6,6'-dihydroxymethyl-2, 2'-bipyridine (1) with 3, 4-dihydroxypyran (DHP). 6.Tetrahydropyranylox...The 6-hydroxymethyl-6'-tetrahydropyranyloxymethyl-2, 2'-bipyridine (2) was synthesized by the reaction of 6,6'-dihydroxymethyl-2, 2'-bipyridine (1) with 3, 4-dihydroxypyran (DHP). 6.Tetrahydropyranyloxymethyl-6'-iodomethyl-2, 2'-bipyridine (5) was obtained from mesylate and iodizating reaction of compound 2. The coupling of 2 and 5 followed by hydrolysis gave bis(6'-hydroxymethyl-2, 2'-bipyridine-6-methyl) ether (7). The macrocyclic ligand 8 was obtained by treating 7 and 6, 6'-dibromethyl-2, 2'-bipyridine. The synthetic conditions of the intermediate 2 and macocyclic ligand 8 were discussed.展开更多
The complex dimethylgallium- [4-nitro-2- (N-benzo- 15-crown-5 ) - 1 -phenoxide ] (C23H31 N2O7Ga) has been synthesized by the method reported. The crystal X-ray diffraction analysis shows that the crystal belongs to th...The complex dimethylgallium- [4-nitro-2- (N-benzo- 15-crown-5 ) - 1 -phenoxide ] (C23H31 N2O7Ga) has been synthesized by the method reported. The crystal X-ray diffraction analysis shows that the crystal belongs to the triclinic with space group P1, M = 517. 23 and the unit cell parameters: a = 1. 4501 (2), b = 1. 5090(2), c = 1. 3865 (6)nm, a = 105. 58(1 ), β = 117. 26(2), γ = 66. 812(8)°, V= 2. 464546nm3, Z =4, Dc = 1. 39g· cm-3, u = 11. 6cm-1, F(000) = 1080, R = 0. 051, Rw = 0. 064. The coordination number of Ga is four and the gallium atom is located in a distorted tetrahedron structure.展开更多
6,6′-二羟甲基-2,2′-联吡啶(1)经与3,4-二氢吡喃(DHP)反应得到6-羟甲基-6′-四氢吡喃(THP)氧甲基-2,2′-联吡啶(2);化合物(2)经甲磺酰化和碘化反应得到6-碘甲基-6′-四氢吡喃氧甲基-2,2′-联吡啶(5);(2)和(5)经缩合、醇解反应得到双(6...6,6′-二羟甲基-2,2′-联吡啶(1)经与3,4-二氢吡喃(DHP)反应得到6-羟甲基-6′-四氢吡喃(THP)氧甲基-2,2′-联吡啶(2);化合物(2)经甲磺酰化和碘化反应得到6-碘甲基-6′-四氢吡喃氧甲基-2,2′-联吡啶(5);(2)和(5)经缩合、醇解反应得到双(6′-羟甲基-2,2′-联吡啶-6-甲基)醚(7);(7)与6,6′-二溴甲基-2,2′-联吡啶反应得到大环配体(8). 对中间体(2)的合成条件进行了探讨. 所有中间体和大环配体均经元素分析、1 H NMR、MS等证实了它们的结构和组成.展开更多
文摘A novel dihydroxyl azacrown ether chitosan was synthesized by reacting dihydroxyl azacrown ether with epoxy activated chitosan. The adsorption property of the azacrown ether chitosan for Pb2+, Cr3+, and Ag+, were determined. The experimental results showed that the dihydroxyl azacrown ether grafted chitosan has high adsorption capacity and high selectivity for some metal ions.
文摘The 6-hydroxymethyl-6'-tetrahydropyranyloxymethyl-2, 2'-bipyridine (2) was synthesized by the reaction of 6,6'-dihydroxymethyl-2, 2'-bipyridine (1) with 3, 4-dihydroxypyran (DHP). 6.Tetrahydropyranyloxymethyl-6'-iodomethyl-2, 2'-bipyridine (5) was obtained from mesylate and iodizating reaction of compound 2. The coupling of 2 and 5 followed by hydrolysis gave bis(6'-hydroxymethyl-2, 2'-bipyridine-6-methyl) ether (7). The macrocyclic ligand 8 was obtained by treating 7 and 6, 6'-dibromethyl-2, 2'-bipyridine. The synthetic conditions of the intermediate 2 and macocyclic ligand 8 were discussed.
文摘The complex dimethylgallium- [4-nitro-2- (N-benzo- 15-crown-5 ) - 1 -phenoxide ] (C23H31 N2O7Ga) has been synthesized by the method reported. The crystal X-ray diffraction analysis shows that the crystal belongs to the triclinic with space group P1, M = 517. 23 and the unit cell parameters: a = 1. 4501 (2), b = 1. 5090(2), c = 1. 3865 (6)nm, a = 105. 58(1 ), β = 117. 26(2), γ = 66. 812(8)°, V= 2. 464546nm3, Z =4, Dc = 1. 39g· cm-3, u = 11. 6cm-1, F(000) = 1080, R = 0. 051, Rw = 0. 064. The coordination number of Ga is four and the gallium atom is located in a distorted tetrahedron structure.
文摘6,6′-二羟甲基-2,2′-联吡啶(1)经与3,4-二氢吡喃(DHP)反应得到6-羟甲基-6′-四氢吡喃(THP)氧甲基-2,2′-联吡啶(2);化合物(2)经甲磺酰化和碘化反应得到6-碘甲基-6′-四氢吡喃氧甲基-2,2′-联吡啶(5);(2)和(5)经缩合、醇解反应得到双(6′-羟甲基-2,2′-联吡啶-6-甲基)醚(7);(7)与6,6′-二溴甲基-2,2′-联吡啶反应得到大环配体(8). 对中间体(2)的合成条件进行了探讨. 所有中间体和大环配体均经元素分析、1 H NMR、MS等证实了它们的结构和组成.
