担载铕催化剂氢还原的穆斯堡尔谱研究

使用原位穆斯堡尔谱考察了γ－Ａｌ２Ｏ３、ＳｉＯ２、ＴｉＯ２和ＺｒＯ２等几种载体担载的氧化铕催化剂的还原性。非担载Ｅｕ２Ｏ３很难在Ｈ２中原，而Ｅｕ２Ｏ３与γ－Ａｌ２Ｏ３、ＳｉＯ和ＴｉＯ２间存在着强相互作用，担载在这些载体上的Ｅｕ２Ｏ３在７７３Ｋ左右Ｈ２中处理可有不同程度的还原，其还原度反映了相互作用的强弱，为：Ｅｕ／γ－Ａｌ２Ｏ３＞Ｅｕ／ＴｉＯ２＞Ｅｕ／ＳｉＯ２＞Ｅｕ／ＺｒＯ２、Ｅｕ／ＺｒＯ２不能在     

LaNi4M(Ni,Cu,Fe)-H2体系的量热研究

本文用量热法测定了氢在LaNi₅,LaNi₄Cu,LaNi₄Fe中溶解的相对偏摩尔焓△H_Hα→β和偏摩尔自由能△G_Hα→β,并计算了偏摩尔熵△S_Hα→β。用X光衍射分析计算了LaNi₅,LaNi₄Cu,LaNi₄Fe的晶胞体积V,发现了△H_Hα→β和△G_Hα→β)与V存在线性关系。     

镧镍体系(LaNi5-xMx)吸氢化合物的研究(Ⅰ)——LaNi5的化学合成及吸氢性能

过渡金属氢化物因与氢能源的利用紧密有关,近年来在国际上引起极大注意。本文提出了吸氢化合物LaNi₅的一种新的合成方法--共沉淀还原法,并详细研究了反应过程。     

Binding equilibrium of I- to serum albumin with resonance Rayleigh scattering

The binding equilibrium between l- and human serum albumin (HSA) or bovine serum albumin (BSA) has been studied by means of the resonance Rayleigh scattering (RRS) and equilibrium dialysis. It has been found for the first time that RRS and multiple frequency scattering (MFS) are enhanced as the l- binding to the HSA and BSA, but fluorescence quenches. The equilibrium dialysis results suggest that the binding of l- to HSA and BSA fits a phase-distribution model other than Scsitchard model, and that the order of magnitude of its phase-distribution constant was found to be 104. It is most probable that Cl~ or other anion ions influence the binding of P by changing the ionic strength in the solution. The dialysis at different pH indicates that the binding mechanism is due to the electrostatic forces between the T-and protonated basic amino-acid residues.     

理科化学大一“普通化学”的改革思考

时代进入新世纪,高等学校面临新的一轮教学改革.为适应国家经济建设和科教兴国的需要,认真进行改革,需要率先回顾前50年历届教学改革的经验和教训.1952年高等学校全面学习苏联,引入了苏联教育体制和课程体制.     

Binding equilibrium of I? to serum albumin with resonance Rayleigh scattering

The binding equilibrium between l⁻ and human serum albumin (HSA) or bovine serum albumin (BSA) has been studied by means of the resonance Rayleigh scattering (RRS) and equilibrium dialysis. It has been found for the first time that RRS and multiple frequency scattering (MFS) are enhanced as the l⁻ binding to the HSA and BSA, but fluorescence quenches. The equilibrium dialysis results suggest that the binding of l⁻ to HSA and BSA fits a phase-distribution model other than Scatchard model, and that the order of magnitude of its phase-distribution constant was found to be 10⁴. It is most probable that Cl⁻ or other anion ions influence the binding of l⁻ by changing the ionic strength in the solution. The dialysis at different pH indicates that the binding mechanism is due to the electrostatic forces between the l⁻ and protonated basic amino-acid residues.     

O-碳硼烷醚类衍生物的合成

碳硼烷是一类对空气、热和化学作用稳定的有机硼化合物。到目前已制得了几百个各种类型的碳硼烷衍生物,但关于其醚类衍生物则报导得很少,对称性的醚类衍生物几乎未见报导^[1-4]。就合成方法而言,直接由炔化物合成1,2-二碳对称取代的碳硼烷也是少见的。我们由炔化物与双-(二乙硫醚)合十二氢癸硼烷直接合成了两个新的对称性o-碳硼烷醚类衍生物,扩展了用直接法合成o-碳硼烷衍生物的途径。     

新型双铜配合物合成,表征及生物活性

合成了９种新的五苯并咪唑甲基二乙三胺双铜配合物，对配合物进行了元素分析、ＩＲ、ＵＶ－ｖｉｓ、ＥＳＲ、磁性等表征。测定了配合物的儿茶酚酶活性及生物活性。配合物的双铜间存在反铁磁相互作用，Ｃｕ—Ｎ键具部分共价性。发现该类配合物具有体外抗癌活性和农药活性。     

Fe(0)(CO)3(Ph2Ppy)2Mn+Cln中金属-金属成键的光谱研究

本文研究了七个以反式二（二苯基膦吡啶）－三羰基铁为三齿配体的过渡金属双核配合物，将Ｊｏｒｇｅｎｓｅｎ建议的处理电荷转移光谱的方法推广处理ＭＭＣＴ跃迁，通过光学电负性的计算取得金属－金属成键的证据。由Ｒａｍａｎ光谱羰基伸缩振动频率的蓝移进一步支持这类化合物中存在金属－金属成键相互作用的推断。     

Me_4Bzo_2[14]六烯(2-)N_4金属配合物的结构和反应性研究 Ⅰ.溴碘加成物的合成和振动光谱研究

本文合成了Co(Ⅱ)、Ni(Ⅱ)、Cu(Ⅱ)、Cu(Ⅱ)大环配合物及其溴碘加成物,研究了远红外和Raman光谱,对MN_4局部进行了伸缩振动的简正坐标分析,求得了各化合物的键角和伸缩力常。通过Raman光谱初步确定了溴碘的存在形式。对溴碘加成物的叠层结构和各化合物的成键进行了讨论。