meso—四（4—溴苯基）卟啉分光光度法测定烟草中的痕量铅的研究

本研究了在ＰＨ９．０和有Ｔｗｅｅｎ－８０存在下非水溶性试剂ｍｅｓｏ四（４－溴苯基）卟啉与铅的张合反应条件，络合物的最大吸收波长为４６８ｎｍ，组成摩尔比为１：１，铅含量在０－２４μｇ／２５ｍＬ范围内有较好的线性关系，表观摩尔吸光系数为２．８７×１０＾５，用于烟草中痕量铅的测定，结果令人满意。     

meso—四（4—磺酸苯基）卟啉与铅显色反应及其应用

研究了铅与meso-四(4-磺酸苯基)卟啉(TPPS_4)的显色反应条件,试验发现,在盐酸羟胺存在下和碱性(pH 12)介质中,铅与TPPS_4在室温即可络合完全,络合比为1:1,摩尔吸光系数ε=2.64X10~5,铅含量在0～2.0μg/10ml范围内呈线性,经APDC/MIBK 萃取分离,排除干扰后,用于自来水、桃叶中痕量铅的测定,结果满意.     

meso—四（4—溴苯基）卟啉与Ag（I）的显色反应光度法研究

研究了ｐＨ１０．０，Ｔｗｅｅｎ－８０存在时，ｍｅｓｏ－四（４－溴苯基）卟啉与Ａｇ（Ｉ）络合显色的反应条件，络合物的最大吸收波长为４２７ｎｍ，表观摩尔吸光系数为３．５×１０５，Ａｇ（Ｉ）在０～０．４８ｍｇ／Ｌ范围内呈线性关系，回归方程为：Ａ＝０．１３１Ｃ＋０．００１２，相关系数γ＝０．９９９８。此法用于纯铅样和照相废液中痕量银的测定，结果与ＡＡＳ结果相比令人满意     

meso－四（4－溴苯基）卟啉分光光度法测定烟草中的痕量铅的研究

本文研究了在ｐＨ９．０和有Ｔｗｅｅｎ－８０存在下非水溶性试剂ｍｅｓｏ－四（４－溴苯基）卟啉与铅的络合反应条件，络合物的最大吸收波长为４６８ｎｍ，组成摩尔比为１∶１，铅含量在０～２４μｇ／２５ｍＬ范围内有较好的线性关系，表观摩尔吸光系数为２．８７×１０￣５，用于烟草中痕量铅的测定，结果令人满意。     

Meso—四—（3,5—二溴—4—羟基苯）卟啉分光光度测定食品中微量铅

研究了溴代卟啉试剂（ＤＢＨＰ）Ｐ分光光度法测定食品中微量铅。在０．０８ｍｏｌ／ＬＮａＯＨ介质中,铅与Ｔ（ＤＢＨＰ）Ｐ反应生成一橙黄色配合物,λｍａｘ＝４７９ｎｍ,ε＝２．２×１０＾５Ｌ·ｍｏｌ＾－１·ｃｍ＾－１。铅在０－１２μｇ／２５ｍＬ范围内符合比耳定律,用于食品中微量铅的测定,获得满意结果。     

四（4—甲氧基—3—磺酸苯基）卟啉分光光度法测定微量铅

研究了水溶性卟啉５，１０，１５，２０－四（４－甲氧基－３－磺酸苯基）卟啉（Ｔ（４－ＭＯＰ）ＰＳ４）与铅的显色反应，在ｐＨ１１和酒石酸钾存在下铅与Ｔ（４－ＭＯＰ）ＰＳ４在室温时间形成１：１的配合物，其最大吸收波长在位于４６４．４ｎｍ，摩尔吸光系数为２．３×１０＾５Ｌ．ｍｏｌ＾－１．ｃｍ＾－１，铅量在０～２０μｇ／２５ｍＬ，范围为符合比尔定律，工作工线回归方程Ａ＝０．０２６２＋０．０４３５ｃ相关系数ｒ     

Inclusion Complexes of Cyclodextrins with Tetrakis(4-carboxyphenyl)porphyrin and Tetrakis(4-sulfonatophenyl)porphyrin in Aqueous Solutions

In neutral and alkaline solutions, tetrakis(4-carboxyphenyl)porphyrin (TCPP) and tetrakis(4-sulfonatophenyl)porphyrin (TSPP) form 1:1 and 2:1 host–guest inclusion complexes with -cyclodextrin (-CD), -cyclodextrin (-CD), and 6-deoxy-6-diethylamino--CD (DEA--CD), except for DEA--CD in alkaline solution. On the other hand, TCPP and TSPP form only 1:1 inclusion complexes with 6-deoxy-6-dihexylamino--CD (DHA--CD). The limited solubilities of DEA--CD in alkaline solution and DHA--CD are likely responsible for no observation of the 2:1 inclusion complex containing DEA--CD in alkaline solution and that containing DHA--CD. The equilibrium constants (Ks) of TCPP and TSPP for the formation of the inclusion complexes have been estimated from the absorption and/or fluorescence intensity changes in neutral and alkaline solutions. The K₂ values, which are the equilibrium constants for the formation of the 2:1 host–guest inclusion complex from the 1:1 inclusion complex, are about one tenth the corresponding K₁ values, except for the -CD–TSPP system in alkaline solution. In neutral solution, where DEA--CD and DHA--CD are in protonated forms, the electrostatic force operates between DEA--CD (DHA--CD) and TCPP (TSPP), leading to the greater K values than those in alkaline solution, where DEA--CD and DHA--CD exist as neutral species.     

Tetrakis(4-pyridyl)porphyrin supramolecular complexes with cyclodextrins in aqueous solution

The formation of inclusion complexes of hydroxypropyl-beta-cyclodextrin, heptakis(2,6-di-O-methyl)-beta-cyclodextrin and heptakis(2,3,6-tri-O-methyl)-beta-cyclodextrin with 5,10,15,20-tetrakis(4-pyridyl)porphyrin (TpyP) has been studied in aqueous buffer solution (phosphate buffer pH = 7 and I = 0.01 M) to give a structural and spectroscopic characterization of a new class of potential sensitizers for photodynamic therapy. The interaction was investigated by a combination of UV/Vis absorption, fluorescence anisotropy, time-resolved fluorescence and circular dichroism. The experimental results point to the presence of the pigment in water in a monomeric complexed form. The fluorescence anisotropy measurements suggest that TpyP forms 1:1 complexes with heptakis(2,3,6-tri-O-methyl)-beta-cyclodextrin and hydroxypropyl-beta-cyclodextrin, while 1:2 complexes are obtained with heptakis(2,6-di-O-methyl)-beta-cyclodextrin.     

四(对－硝基)苯基卟啉锰配合物的光谱电化学性质

应用循环伏安、现场紫外可见光谱和红外光谱电化学技术确认了四(对-硝基)苯基卟啉锰配合物产生不同氧化态锰卟啉的电位及其电子光谱和振动光谱特征,发现卟啉周环上硝基的还原发生在Mn²⁺还原之后,金属价态变化敏感带出现在1597、1523、1207、825和806cm^-1附近。     

Interactions of Tetrakis(4-sulfonatophenyl)porphyrin with γ-Cyclodextrin and Alkyltrimethylammonium Bromides in Aqueous Solutions

Tetrakis(4-sulfonatophenyl)porphyrin (TSPP) forms complexes with octyltrimethylammonium bromide (OTMA) and hexyltrimethylammonium bromide (HTMA) in pH 7.3 buffers. At low concentrations of OTMA (HTMA), a 1:1 TSPP–OTMA complex is formed. As the OTMA (HTMA) concentration is increased, a 1:2 TSPP–OTMA (HTMA) complex is also formed. The equilibrium constants for the formation of the TSPP–OTMA (HTMA) complexes have been evaluated from a simulation of the observed fluorescence intensity data. In the induced circular dichroism spectrum, the signal intensity of TSPP in aqueous solutions containing both γ-CD and OTMA has been similar to that containing only γ-CD, suggesting the formation of the 1:1:1 γ-CD–TSPP–OTMA (HTMA) inclusion complex. Capillary electrophoretic study has exhibited the formation of the 1:1 TSPP–OTMA (HTMA) complex, although the 1:2 TSPP–OTMA (HTMA) complex could not be observed, probably because the OTMA (HTMA) concentration used was low. The equilibrium constants for these 1:1 complexes have been evaluated from the variation in the electrophoretic mobility. The equilibrium constant for the formation of the 1:1:1 γ-CD–TSPP–OTMA or γ-CD–TSPP–HTMA complex has been evaluated from a simulation of the electrophoretic mobility change in TSPP solution containing γ-CD and OTMA or HTMA, although the equilibrium constants for the ternary inclusion complexes could not be evaluated using the fluorescence method due to the small fluorescence intensity change.     

一种合成四(4-N,N-二甲胺基苯基)卟啉的新方法

提出了一种四(4-N,N-二甲胺基苯基)卟啉合成的新方法.该法以氮气为载气携带吡咯蒸气向反应体系中引入定量吡咯,通过降低体系中吡咯浓度,抑制部分副反应,达到提升卟啉合成产率的目的.在研究催化剂用量和反应温度对产物产率影响的基础上,确定了最优化条件:在130℃,二氯乙酸为催化剂,4-N,N-二甲胺基苯甲醛与催化剂的物质的量比为37.3时,四(4-N,N-二甲胺基苯基)卟啉的产率可高达57.0%,这是目前该卟啉最高的合成产率报道.     

Reaction of 4-(N,N-Dimethylaminophenyl)magnesium Bromide with Palladium Tetrakis(triphenylphosphine)

The influence of reaction conditions on catalyzed by Pd(PPh₃)₄ cross-coupling of 4-N,N-dimethylaminophenylmagnesium bromide with 4-bromobenzonitrile in tetrahydrofuran was investigated. The yield of the product of the catalytic process, 4-N,N-dimethylamino-4'-cyanobiphenyl, and of the main product of noncatalytic process, 4-N,N-dimethylaminophenyl 4'-bromophenyl ketone, is mainly governed by the order of introduction of reagents and catalyst into the reaction zone. Experimental observations and analysis of side products suggested conclusions on the processes resulting in deactivation of the catalyst.     

非水溶性meso-四-(4-乙酰氧基苯)卟啉的合成及其与铅显色反应的研究

目前在用水溶性卟啉衍生物作显色剂方面已有文献总结^[1]。但对非水溶性卟啉则研究得较少。就测定痕量铅而言,皆用水溶性卟啉衍生物,而用非水溶性卟啉测定铅,则尚未见报导^[2-6]。     

中位四(1-苯基吡唑-4-基)卟啉掺杂空穴传输材料的红色有机电致发光器件(英文)

使用中位-四(1-苯基吡唑-4-基)卟啉(TPPyPH2)掺杂空穴传输材料N,N′-二苯基-N,N′-双(4-甲苯基)-1,1′-二苯基-4,4′-二胺(TPD)制备了红色有机电致发光器件.因为TPD的发射光谱与TPPyPH2的吸收光谱具有更大的光谱重叠,为了得到更为有效的从主体材料TPD向红光染料TPPyPH2的能量传递,我们使用TPD代替传统的8-羟基喹啉铝(Alq3)作为主体发光材料.器件在680nm处具有纯的红光发射峰;通过使用Alq3电子传输层以及使用Alq3共掺杂发光层的方法,使器件的发光性能得到了改善,结构为ITO/Alq3+TPPyPH2+TPD(50nm)/Alq3(30nm)/Al的器件的最大发光亮度为177cd/m2.