罗丹明型简易Pd2+高选择性增强型荧光探针

用罗丹明B与水合肼一步反应简便制得罗丹明衍生物RBH,试验发现:在乙腈-水(CH3CN:H2O=4:1)溶液中,RBH对Pd2+具有高选择性和广泛的pH探测范围,其对常见金属离子不敏感,且常见钠、钾盐阴离子对Pd2+探测也无干扰作用。探针RBH与Pd2+结合后,RBH的吸收和荧光强度显著增加,其荧光强度增加24倍,检测时间仅需25 min。该Pd2+探针响应灵敏,最低检出限为1.76×10-6mol/L。RBH对Pd2+的识别过程为不可逆,且该探针可制成试纸检测mmol/L级别含Pd2+水样。     

含芳胺及二肽的铜(Ⅱ)配合物的结构及其应用

含芳胺及二肽的铜(Ⅱ)配合物具有良好的DNA切割活性、SOD活性和抗肿瘤活性,可作化学核酸酶、SOD模拟物及肿瘤化疗药物等应用,因而引起了国内外学者的广泛关注。本文就国内外对含芳胺及二肽的铜(Ⅱ)配合物研究的进展,尤其是该类配合物的结构及其应用作一综述。     

一种三元共聚物磷酸盐的合成及性能研究

由丙烯酰胺、丙烯酸、3-二甲胺基烯丙基磷酸在过硫酸铵-亚硫酸氢钠氧化还原引发体系下合成了一种新型的AM/AA/DMAAPA三元共聚物.确立了最佳反应条件:AM/AA= 3/1(wt％),引发剂用量0.5wt％,pH为7,反应温度为40℃;并通过红外光谱分析确认了AM/AA/DMAAPA三元共聚物结构.当Na+;Cab,...     

Centrality and energy dependence of rapidity correlation patterns in relativistic heavy ion collisions

The centrality and energy dependence of rapidity correlation patterns are studied in Au+Au collisions by using AMPT with string melting,RQMD and UrQMD models.The behaviors of the shortrange correlation(SRC)and the long-range correlation(LRC)are presented clearly by two spatial-position dependent correlation patterns.For centrality dependence.UrQMD and RQMD give similar results as those in AMPT,i.,e., in most central collisions,the correlation structure is flatter and the correlation range is larger,which indicates a long range rapidity correlation.A long range rapidity correlation showing up in RQMD and UrQMD implies that patton interaction is not the only source of long range rapidity correlations.For energy dependence,AMPT with string melting and RQMD show quite different results.The correlation patterns in RQMD at low collision energies and those in AMPT at high collision energies have similar structures,i.e.aconvex curve.while the correlation patterns in RQMD at high collision energies and those in AMPT at low collision energies show fiat structures,having no position dependence.Long range rapidity correlation presents itself at high energy and disappears at low energy in RQMD,which also indicates that long range rapidity correlations may come from some trivial effects,rather than the parton interactions.     

CLASSIFICATION OF SOLUTIONS TO HIGHER FRACTIONAL ORDER SYSTEMS

Let 0 ＜ α,β ＜ n and f,g ∈ C([0,∞) ×[0,∞)) be two nonnegative functions.We study nonnegative classical solutions of the system{(-Δ)α/2u=f(u,v) in Rn,(-Δ)β/2 v =g...     

ChemInform Abstract: Polymorphism of CsAlF4. Synthesis and Structure of Two New Crystalline Forms.

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.     

三元混配铜(Ⅱ)配合物的晶体结构、DNA作用及其生物活性

利用溶剂缓慢挥发法合成了以5-氯-2-(2'-吡啶基)苯并咪唑为主配体、L-苯丙氨酸根为辅助配体的三元混配铜(I)配合物:[Cu(HPBC)(L-Phe)(H2O)]C1O4(简称为1,HPBC=5-氯-2-(2'-吡啶基)苯并咪唑,L-Phe=L-苯丙氨酸根).采用元素分析、红外光谱、紫外可见光谱、摩尔电导率测定和电...