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壳聚糖衍生物的制备及其吸附性能 总被引:18,自引:2,他引:18
壳聚糖衍生物的制备及其吸附性能曲荣君,马千里,郑秀丽,孙言志(烟台师范学院化学系烟台264025)关键词壳聚精衍生物,制备,吸附壳聚糖(CTS)是重金瞩离子的吸附剂 ̄[1,2],由于壳聚精分子中的-NH_2在pH较低的水溶液易形成而使CTS溶于水,造... 相似文献
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壳聚糖固定化亚铁Schiff碱配合物的研究 总被引:5,自引:0,他引:5
利用具有多种生物医用活性的高分子壳聚糖的轴向配位作用合成了壳聚糖-N-亚水杨基氨基酸Schiff碱亚铁配合物,采用IR光谱、元素分析、荧光光谱、紫外-可见吸收光谱和热分析等分析手段对配体及高分子配合物进行了表征,推测了其结构.以核黄素光化学氧化-羟胺-偶氮比色法研究了该化合物对超氧离子自由基的清除能力.结果表明,壳聚糖固定化的N-亚水杨基氨基酸Schiff碱亚铁配合物对超氧离子自由基的清除能力有所降低,但仍具有较强的抑制作用. 相似文献
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二个含N-取代水杨基Schiff碱配体的镍配合物的合成和晶体结构 总被引:2,自引:0,他引:2
合成了二个N-取代水杨基Schiff碱的Ni(Ⅱ)配合物[Ni2(dsh)(C5H5N)6]·2C5H5N (H4dsh=1,2-disalicyloylhydrazine) (1)和Ni(spmbh)(C5H5N) (H2spmbh=N-salicylaldehyde-N-(4-methoxybenzoyl) hydrazone) (2)。化合物1:单斜晶系,P21/c空间群,a=1.274 74(5) nm,b=1.646 31(7) nm,c=1.199 59(5) nm,β=103.344(1)°,V=2.449 5(2) nm3,Z=2,Dc=1.381 g·cm-3,Mr=1 018.44,μ=0.826 mm-1,F(000)=1 060,R=0.033 1,wR=0.073 3;化合物2:单斜晶系,P21/c空间群,a=1.096 74(8) nm,b=0.946 44(6) nm,c=1.725 7(1) nm,β=91.006(4)°,V=1.791 0(2) nm3,Z=4,Dc=1.506 g·cm-3,Mr=406.08,μ=1.109 mm-1,F(000)=840,R=0.031 7,wR=0.049 0。具有晶体学中心对称性的双核镍化合物1中,1,2-二水杨酰基肼通过肼基N-N单键桥联二个Ni(Ⅱ)原子,Ni…Ni原子间距为0.468 83(4) nm,每个Ni(Ⅱ)原子具有轴向伸长的八面体配位构型。化合物2中,Ni(Ⅱ)原子具有平面正方形的配位构型。 相似文献
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For the first time, N-(2-hydroxyl) propyl-3-trimethyl ammonium chitosan chloride (HTCC) was prepared through a fast, easy and efficient method with the assistance of microwave irradiation, and the quaternized chitosan was also degraded via the microwave irradiation. A comparative study was performed by using the conventional heating method to prepare HTCC. The structure and property of the quaternized chitosan obtained by these two methods were characterized by GPC, XRD, FTIR, NMR, TG and elemental analysis. It was shown that quaternized chitosan was successfully prepared within 50 min via microwave irradiation method, while a much longer time of 6–7 h was needed with the conventional heating method. The substitutions both occurred on the C2 position of chitosan with the two different methods, and their HTCC products had weight average similar molecular weight (Mw), structure and thermal stability. The HTCC prepared by the microwave irradiation method had a little lower degree of substitution (DS) than those prepared via conventional heating with the same mole ratio (6:1) of the intermediate to chitosan. The degradation study showed that the Mw of HTCC decreased rapidly from 4.6 × 105 to 1.1 × 105 in 1 h under microwave irradiation, while it only decreased from 4.6 × 105 to 2.1 × 105in 1 h through conventional heating degradation. These results revealed that microwave irradiation is a more efficient and environment-friendly way to obtain the water-soluble chitosan derivatives and their degraded products. 相似文献
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席夫碱壳聚糖修饰电极的制作及其在对苯二酚测定中的应用 总被引:7,自引:0,他引:7
通过共价键合的方法将所制备的席夫碱壳聚糖修饰在玻碳电极表面 ,制成席夫碱壳聚糖修饰电极(SBCME) ,并对其电化学特性进行了研究。利用微分脉冲伏安法测定了对苯二酚 (HQ) ,结果表明 :在 0 .5mol L三羟甲基氨基甲烷 (tris)底液 (pH 3 .0 )中 ,电极对HQ具有良好的吸附性与选择性 ,HQ浓度在 1 .0× 1 0 - 6~ 2 .0×1 0 - 3mol L范围内与其氧化峰电流呈线性关系 ,检出限可达 1 .0× 1 0 - 7mol L。利用此电极测定样品 ,结果满意 相似文献
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