H2BPMPBD和TOPO协同萃取Ln3+的研究

研究了1,4-双(1'-苯基-3'-甲基-5'-氧代吡唑-4'-基)丁二酮(H2BPMPBD,简为H2A)和三正辛基氧化膦(TOPO)的氯仿溶液从硝酸介质中对Ln3+的协同萃取.用斜率法确定了萃合物的组成为LaA·HA·TOPO,考察了萃取剂浓度和溶液酸度对萃取机理的影响,测定了半萃取pH1/2值和萃取反应平衡常数Ks.e,求得了反应的焓变和熵变.     

H2BPMPBD和AP协同萃取Ln(Ⅲ)的研究

研究了1,4-双(1′-苯基-3′-甲基-5′-氧代吡唑-4′-基)丁二酮-[1,4](H2BPMPBD,简为H2A)和氨基比林(AP)的氯仿溶液从硝酸介质中对Ln( )的协同萃取。用斜率法确定了萃合物的组成为LaA·HA·(AP)2,考察了萃取剂浓度和溶液酸度对萃取机理的影响,测定了半萃取pH1/2值和萃取反应平衡常数Ks.e.,求得了反应的焓变和熵变。     

钠代草酰乙酸乙酯的合成及与苯肼的反应

以乙酸乙酯和草酸二乙酯为原料，经交叉Claisen酯缩合反应合成钠代草草酰乙酸乙酯。讨论反应时间、碱的浓度、原料配比对反应的影响。得出较佳工艺条件为：n(乙醇钠）：n（乙酸乙酯）：n(草酸二乙酯）＝1．02：1．02：1．00，乙醇钠浓度为19．5％，反应时间为4h，产率为76％。用此盐与苯肼与酸性条件下进行加成缩合反应可制得1－苯基－3－羧酸乙酯－5－吡唑啉酮。产物的结构经红外光谱分析确认。     

A Novel Nanobody–Photosensitizer Conjugate for Hypoxia Resistant Photoimmunotherapy

As a non-invasive treatment modality, photodynamic therapy has been a potential therapeutic method for metastatic and non-metastatic tumors. In order to further improve the tumor selectivity, phtotoimmunotherapy (PIT) has been developed recently, which includes antibodies as the active targeting ligands. However, traditional monoclonal antibody-based PIT suffers from long half-lives and extended phototoxic side-effects in vivo. Herein, a type I mechanism-based photoimmunoconjugate (PIC) is developed by incorporating anti-EGFR nanobody as the targeting ligand, and benzophenothiazine as the photosensitizer (PS). The small size and robust structure of the nanobody ensures excellent targeting accuracy and efficient renal excretion. Meanwhile, the type I PS is able to circularly transfer oxygen to superoxide radical upon irradiation to overcome hypoxia microenvironment. The PIC showed satisfying phototherapeutic ability both in normoxia and hypoxia, and displayed high selectivity towards tumor in vivo. By combining nanobody and Type I PS, the work presents a novel type of PIC for the precise treatment of tumors with high specificity and potency.     

取代吲哚-3-甲醛与3-甲基-1-苯基-5-吡唑啉酮的固相缩合反应

在无溶剂、无催化剂、微波辐射条件下,取代吲哚-3-甲醛与3-甲基-1-苯基-5-吡哇啉酮通过固相Knoevenagel缩合反应合成了一系列4-(取代吲哚基-3-次甲基)-3-甲基-1-苯基-5-吡唑啉酮,产物结构经IR,1H NMR确证.最佳反应条件为:n(吲哚-3-甲醛):n(3-甲基-1-苯基-5-吡哇啉酮)＝1....     

新型过渡金属配合物的合成、表征及生物活性研究

为了寻找更好的生物活性化合物,以1-苯基-3-甲基-5-吡唑啉酮和苯甲酰氯为原料,二氧六环为溶剂,回流反应合成了4-酰基吡唑啉酮配体及4种过渡金属配合物,通过元素分析、红外光谱、差热-热重分析、紫外光谱等对其结构进行了表征,表明配合物组成分别为:Cu(L)2、Zn(L)2、Ni(L)2、Mn(L)2;同时利用抑菌圈大小...     

Strength of adhesive joints with adherend yielding: I. Analytical model

A sandwich element can be isolated in all two-dimensional adhesive joints, thereby simplifying the analysis of strain and stress. An adhesive sandwich model has been developed that accommodates arbitrary loading, a bilinear adherend stress-strain response, and any form of nonlinear adhesive behavior. The model accounts for both the bending deformation and the shear deformation of the adherends. Stress and strain distributions in the adhesive were obtained by solving a system of six differential equations using a finite-difference method. For a sample adhesive sandwich, the adhesive strains and stresses from the new model were compared with those of other models. Finally, the model was coupled with an analytical solution for the detached section of an adhesive joint in peel. The stress and strain distributions in the adhesive and the root curvature of the peel adherend were then compared with finite element results. An accompanying article in this issue uses the model with experimental peel data to investigate the suitability of various adhesive failure criteria.     

1,2-双(1′-苯基-3′-甲基-5′-氧代吡唑-4′-基)乙二酮-〔1,2〕与三正辛基氧化膦协同萃取RE(Ⅲ)的性能和机理研究

研究了 1,2 -双 ( 1′-苯基 - 3′-甲基 - 5′-氧代吡唑 - 4′-基 )乙二酮 -〔1,2〕( H2 A )与三正辛基氧化膦 ( TOPO )协同萃取 RE( ) ( RE=L a、Pr、Nd、Gd、Dy和 Y)的性能。通过考察萃取剂浓度、溶液酸度和温度对 RE( )萃取平衡的影响 ,确定了萃取机理和萃合物组成 ,求得了半萃取 p H1 /2 值和萃取反应平衡常数 Ks.e.。     

H2BPMPBD和HOx协同萃取部分Ln(Ⅲ)

研究了1,4-双(1′-苯基-3′-甲基-5′-氧代吡唑-4′-基)丁二酮-[1,4](H2BPMPBD,简为H2A)和8-羟基喹啉(HOx)的氯仿溶液从硝酸介质中对Ln( )(Ln=La,Pr,Nd,Gd,Dy)的协同萃取。用斜率法确定了萃合物的组成为LaA·HA·HOx,考察了萃取剂浓度和溶液酸度对萃取机理的影响,测定了半萃取pH1/2值和萃取反应平衡常数Ks.e.,求得了反应的焓变和熵变。     

生态橙染料的研制及其在皮革上的应用分析

以邻氨基苯酚对磺酸为原料，取代吡唑啉酮为偶合成分合成偶氮染料，并用Al、Fe金属盐络合生成生态金属络合染料。通过提纯并对其进行分析测定确定其结构，通过皮革染色的试验，分析了不同pH值条件下对生态染料染色性能的影响。