四(4-磺酸基苯基)卟啉在甲壳素膜上的聚集行为研究

利用紫外-可见光光谱仪与共振光散射(RLS)技术研究了在控制条件下的四(4-磺酸基苯基)卟啉(TPPS)在甲壳素膜上的聚集行为.研究发现TPPS在甲壳素膜上的聚集行为强烈地依靠溶液的pH值,在pH值小于4时,TPPS在甲壳素膜上以J-型与H-型聚集体共存的形式聚集,而溶液pH值较高时,TPPS则只能以H-型聚集体的形式聚集于甲壳素膜上.     

Meso-四-(4-磺基苯基)-卟啉光度法测定铅的研究

研究了 meso-四-(4-磺基苯基)-卟啉(TPPS4)与铅的显色反应,在pH=11～13.5的碱性介质中,TPPS4与铅生成1 : 1络合物,λmax=470nm,ε＝3.28×105L·mol-1·cm-1,铅的含量在0～10μg/25ml内符合比尔定律,方法用于食品和水样中铅的测定,结果满意.     

取代四苯基卟啉的合成及性能研究

以吡咯、苯甲醛为主要原料,合成得到四苯基卟啉;将其经硝化、还原、磺化反应处理,又分别得到5-(4-硝基苯基)-10,15,20-三苯基卟啉、5-(4-氨基苯基)-10,15,20-三苯基卟啉、5-(4-氨基苯基)-10,15,20-三(4-磺酸钠苯基)卟啉3种不同取代四苯基卟啉化合物,借助元素分析、红外光谱和核磁共振氢谱等手段对所合成的4种化合物进行了表征.采用紫外-可见光谱法、荧光光谱法以及循环伏安法对4种化合物的光谱性质和电化学性质进行了探究,并讨论了不同取代基的影响.     

非共价作用对金属卟啉光学稳定性的影响

本文采用表面活性剂十六烷基三甲基溴化铵(CTAB)和嵌段共聚物聚乙二醇-b-聚4-乙烯基吡啶(PEG-b-P4VP)分别与5,10,15,20-四-(4-对磺酸基苯基)-锌卟啉(Zn TPPS)进行功能组装,形成以静电相互作用结合的CTAB/Zn TPPS复合体,以配位作用结合的PEG-bP4VP/Zn TPPS复合体,对复合体进行了紫外-可见光谱、荧光发射光谱、透射电子显微镜以及动态光散射表征。研究结果表明:静电作用和配位作用均能增强Zn TPPS的光学稳定性,但CTAB和PEG-b-P4VP浓度对其稳定性影响因素不同。在CTAB/Zn TPPS复合体中,随着CTAB浓度的降低,Zn TPPS的光学稳定性增加;而在PEG-b-P4VP/Zn TPPS复合体中,随着聚合物浓度的增强,Zn TPPS的光学稳定性逐渐增强。相比而言,配位作用在提高金属卟啉的光学稳定性方面发挥着更大的作用。     

氧化锌固载四(4-羟基)苯基锰卟啉选择性催化氧化甲苯

探索氧化锌固载四(4-羟基)苯基锰卟啉的催化性能.用混合溶剂法直接合成四(4-羟基)苯基卟啉(H2 THPP),采用研磨法合成四(4-羟基)苯基锰卟啉[Mn(Ⅲ)THPP].将Mn(Ⅲ)THPP固载到新生成的氢氧化锌沉淀上,经烘焙制得氧化锌固载四(4-羟基)苯基锰卟啉催化剂.用紫外和红外光谱对它进行表征.研究固载催化剂...     

四(对甲氧基苯基)卟啉钴的合成及表征

以对甲氧基苯甲醛与吡咯为原料、丙酸为溶剂、氯乙酸为催化剂,合成四(对甲氧基苯基)卟啉及其钴配合物,用元素分析、紫外-可见光谱、红外光谱、1H核磁共振对化合物进行表征.结果表明,所合成的四(对甲氧基苯基)卟啉及四(对甲氧基苯基)卟啉钴配合物的结构与设计的结构相符;该配体及配合物的荧光光谱数据表明,相对荧光强度是四(对甲氧基苯基)卟啉四(对甲氧基苯基)卟啉钴四苯基卟啉.     

水溶性meso-四(4-氯-3-磺酸钠苯基)卟啉合成的改进

以非水溶性卟啉为原料合成水溶性卟啉meso-四(4-氯-3-磺酸钠苯基)卟啉,氯仿作溶剂,氯磺酸作为磺化试剂,与meso-四(4-氯苯基)卟啉反应,并确定其最佳反应条件为n(卟啉):n(氯磺酸)=1.33:29.80,氯仿15 mL,温度60 ℃,反应时间2 h.该法较传统磺化方法反应温度低60～80 ℃且易于控制,不产生粘稠状的副产物,产物易于分离纯化,产率达11.4 %.     

紫外可见光谱协助快速纯化卟啉及金属卟啉的光催化取代基效应

以丙酸为溶剂,吡咯与4-取代苯甲醛反应合成5,10,15,20-四(4-取代苯基)卟啉.根据卟啉Soret带和Q带的特点,用紫外可见光谱协助监测柱层析中满足特征谱带的流出组份,快速分离纯化卟啉.以5,10,15,20-四(4-甲氧羰基苯基)卟啉为配体,与不同金属离子反应得到金属卟啉,对其进行可见光降解有机污染物罗丹明B...     

乙酸乙酯键联卟啉的合成与表征

从5,10,15,20-四苯基卟啉合成5-(p-β-乙酸乙酯基氨基苯基)-10,15,20-三苯基卟啉：5,10,15,20-四苯基卟啉(A)与发烟硝酸反应得到5-(对-硝基苯基)-10,15,20-三苯基卟啉(B),产率48．7％;B与二氯化锡进行还原反应得到5-(对-氨基苯基)-10,15,20-三苯基卟啉(C),产率72．0％;C在无水碳酸钾和无水碘化钾催化下与氯乙酸乙酯进行亲核取代反应得到5-(p-β-乙酸乙酯基氨基苯基)-10,15,20-三苯基卟啉(D),产率8．5％。该方法的反应条件温和,合成路线短,纯化方法简单。     

α,β,γ,δ-四苯基卟啉的合成研究

以N,N 二甲基甲酰胺或二甲基亚砜为溶剂,在无水硫酸镁存在下,将CO2通入吡咯与苯甲醛混合液中反应,可以直接合成不含四苯基二氢卟啉(简称TPC)的四苯基卟啉(简称TPPH2)。     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

Achieving Unusual States of Matter Under High Pressure

正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-     

Density Functional Theory for the Response of Periodic Systems to Electric Fields Based on the Vector Potential Approach

正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that     

On the Thermodynamic Limit for Responses to Static Electromagnetic Fields

For molecular systems,the quantum-mechanical treatment of their responses to static electromagnetic fields usually employs a scalar-potential treatment of the electric field and a vector-potential treatment of the magnetic field.Although the potential for each field separately is associated with the choice of an(unphysical)origin,the precise choice of the origin for the electrostatic field has little consequences for the results.This is different for the     

An affordable accurate evaluation of the binding conformations predicted by molecular docking studies in bio-system

Franck-Condon factors bridge the gap between theoretical modeling and experimental observations for molecular electronic spectroscopy and electron transfer.Under the displaced harmonic oscillator approximation,multidimensional Franck-Condon factors are decomposed into a product of many one-dimensional(1D)Franck-Condon(FC)factors,and each 1D-FC factor is associated with one Huang-Rhys factor that determines the leading contribution of     

Call for Papers

<正>"The Journal of Shanghai Normal University:Mathematics"is published by Shanghai Normal University as regular issues of The Journal of Shanghai Normal University each year from 2014 in English.The editors-in-chief of the issues are professors Yuhao Cong and Maoan Han.The Journal of Shanghai Normal University was started in 1958 with     

Journal of Donghua University ( English Edition) Contents of Volume 31

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