钌卟啉/MCM-41催化剂的制备、表征及性质

应用３氨丙基三乙氧基硅烷对ＭＣＭ４１ 介孔分子筛进行了改性． 改性产物（ 记为ＭＣＭ４１（ｍ））具有较强的装载钌卟啉［Ｒｕ（ Ⅱ）Ｌ（ＣＯ）（ＥｔＯＨ）］ （Ｌ＝ ｍｅｓｏｔｅｔｒａｋｉｓ（４ｃｌｏｒｏｐｈｅｎｙｌ）ｐｏｒｐｈｙｒｉｎ） 的能力． 制备了裹载０－１％ ～８－３ ％ 钌卟啉的产物（ 记为Ｒｕ／ ＭＣＭ４１（ｍ）） ． 应用Ｘ 射线衍射、差热热失重分析和紫外可见光谱等方法对裹载产物进行了表征． 结果表明,钌卟啉在ＭＣＭ４１（ｍ） 孔道中是以单分子态存在,而不是以晶态存在． 装载后钌卟啉仍保持其基本结构,并且热稳定性增加． 轴向配体取代反应使钌卟啉固定在ＭＣＭ４１（ｍ） 孔道表面上． 低钌含量的Ｒｕ／ＭＣＭ４１（ｍ） 具有高催化活性,这是有效的位置分离和扩散孔道通畅的结果． 以０－１ ％ Ｒｕ／ＭＣＭ４１（ｍ） 和自由的钌卟啉为催化剂进行的６ 种烯烃的氧化反应结果表明,前者的催化转换数是后者的２０ ～４０倍．Ｒｕ／ ＭＣＭ４１（ｍ） 催化剂具有特殊的形状选择性,较长的寿命, 并且容易过滤回收．     

一硝基四苯基卟啉及其Cu(Ⅱ)、Zn(Ⅱ)配合物的电化学和光谱电化学

以卟啉环为配体的金属卟啉配合物具有特殊的光、电、磁及生物功能．在卟啉骨架的吡咯环上引入拉电子基团如ＣＮ或Ｂｒ等,能改变卟啉的氧化还原电位;当有ＰｈＩＯ、Ｈ２Ｏ２、ＮａＯＣｌ、ＲＣＯ３Ｈ等氧化剂存在时,这类卟啉衍生物可作为有机环氧化的催化剂．因此对环取...     

5,10,15—三（4—氨基）苯基—20—苯基卟啉的电聚合膜及其金属化膜的电分…

本文对新型结构的卟啉进行电化学聚合，制得聚卟啉修饰电极，并在此基础上直接进行金属化，得到金属化的Ｃｕ聚卟啉修饰电极，实验表明，聚卟啉修饰电极在ｐＨ１－６的范围，对ｐＨ的变化呈能斯特响应，斜率为５９．８ｍＶ／ｐＨ，金属化Ｃｕ聚卟啉ｐＨ也具有能斯特响应，范围为ｐＨ４－８，斜率为２８．７ｍＶ／ｐＨ。可用于实际样品的测定。     

稳定金属卟啉催化环己烷羟基化反应

在稳定金属卟啉一次氯酸钠模拟体系中，环己烷常温常压下氧化成环己醇和微量环己酮。金属卟啉的活性依次下降，ＦｅＴＤＣＭＮＰＰβ－Ｂｒ８．Ｃｌ〉ＦｅＴＤＣＰＰβ－Ｂｒ．Ｃｌ〉ＦｅＴＤＣＭＮＰＰ．Ｃｌ》ＦｅＴＰＰ．Ｃｌ其稳定性依同样的顺序递减，锰卟啉的活性低于相应的铁卟啉，其活性下降顺序与铁卟啉相同。在金属卟啉基间引入强吸电子ＮＯ２取代基能提高它的活性与稳定性，但卟啉环上β－Ｂｒ取代基的作用更强。     

meso-四(4-N-取代吡啶基)卟啉铜(Ⅱ)配合物的合成及其对O-·2的清除作用

以Ｃｕ２（ＯＨ）２ＣＯ３为原料通过非均相金属插入反应合成ｍｅｓｏ－四（４－Ｎ－甲基吡啶基）卟啉合铜（Ⅱ）（ＣｕＴＭＰｙＰ）和ｍｅｓｏ－四（４－Ｎ－苄基吡啶基）卟啉合铜（Ⅱ）（ＣｕＴＢＰｙＰ）．方法操作方便，产率高．研究表明，在核黄素光照产生Ｏ－·２的体系中，ＣｕＴＭＰｙＰ和ＣｕＴＢＰｙＰ对Ｏ－·２具有明显的清除作用，对人红细胞内血红蛋白具有一定保护作用．     

冠醚－卟啉锰催化剂的制备及其催化性能研究

本文以一类新型的冠醚－卟啉作配体，制备了金属锰配合物．考察了该类配合物对苯乙烯环氧化反应的催化活性，发现具冠醚基团的锰卟啉催化剂在烯烃环氧化的两相溶剂（ＣＨ_２Ｃｌ_２／Ｈ_２Ｏ）体系中，不仅催化活性增强，同时具有相转移能力．本文还探索了反应条件改变对环氧化结果的影响规律，测定了反应的动力学．     

五氟代锰卟啉模拟酶体系快速混合停流吸收谱

采用快速混合停流技术,在实际反应条件下,考察了五氟代锰卟啉配合物Ｍｎ~Ⅲ（ＴＦＰＰ）Ｃ１与两种单氧给体亚碘酰苯ＰｈＩＯ和过氧苯甲酸ｍ－ＣＰＢＡ构建的细胞色素Ｐ－４５０模拟酶体系催化活性物种的生成及催化烯烃环氧化过程．在氧给体ＰｈＩＯ作用下,Ｍｎ~Ⅲ（ＴＦＰＰ）Ｃ１生成了高价锰氧卟啉配合物和双核μ－氧锰卟啉配合物,具有高的催化环氧化活性和催化剂稳定性．而在氧给体ｍ－ＣＰＢＡ作用下,Ｍｎ~Ⅲ（ＴＦＰＰ）Ｃ１则生成了一种较稳定物种,以致催化活性较低。     

细胞色素P-450模拟酶的快速混合停流时间分辨吸收谱研究 Ⅱ.Mn~Ⅲ(Por.)Cl-PhIO体系

采用快速混合停流技术,考察了在实际反应条件下,不同锰卟啉配合物ＭｎⅢ（Ｐｏｒ．）Ｃｌ（Ｐｏｒ．＝ＴＰＰ、ＴＭＯＰＰ和ＴＦＰＰ）与单氧给体ＰｈＩＯ构建的细胞色素Ｐ－４５０模拟酶体系催化活性物种的生成及催化烯烃环氧化过程．在氧给体ＰｈＩＯ作用下,ＭｎⅢ（Ｐｏｒ．）Ｃｌ均生成了高价锰氧卟啉配合物和双核μ－氧锰卟啉配合物;但ＭｎⅢ（ＴＰＰ）Ｃｌ和ＭｎⅢ（ＴＭＯＰＰ）Ｃｌ存在严重的氧化分解,而ＭｎⅢ（ＴＦＰＰ）Ｃｌ不易氧化分解,且它的催化环氧化活性最高．     

四(α-萘基)四苯并卟啉钴配合物的光谱电化学性质

Ｋｅｌｅｔ等［１］研究ＣｏＴＭＡＰＩ催化水制取氢气的反应时指出，活性中心是一价钴卟啉．曹锡章等［２］研究钴卟啉催化ＣＯ２电化学还原时指出，活性中心也是一价钴卟啉．然而，不稳定价态的金属卟啉配合物的制备和性质研究较为困难．光谱电化学的迅速发展为不稳定价...     

金属离子与卟啉的嵌入反应动力学研究（Ⅵ）：——乳酸缓冲体…

研究了在３５±０．１℃、离子强度０．５ｍｏｌ／Ｌ（ＫＣｌ）下，乳酸根催化Ｃｕ＾２＋离子嵌入溴化间－四（Ｎ－乙酸甲酯基－３－吡啶基）卟啉和溴化间－四（Ｎ－氰乙基－３－吡啶基）卟啉的反应动力学。根据催化剂浓度、溶液的ｐＨ值与反应速率间的关系。得到Ｃｕ＾２＋离子嵌入该类卟啉的反应动力学方程。。实验结果表明，该类反应遵循负离子催化卟啉变机理，变形的卟啉及其与乳酸根离子的缔合物为可能的活性中间体。     

Synthesis and Liquid Crystal Properties of Transition Metal Complexes of Mesotetra （4-n-myristyloxyphenyl） porphyrin

Transition metal complexes of meso-tetra (4-myristyloxyphenyl)porphyrin TMPPM′ [M′=Mn, Fe, Co, Ni, Cu, Zn ; TMPP=mesotetra (4-myristyloxyphenyl)porphyrin] have been synthesized and characterized by means of elemental analyses, UV-Vis spectra, infrared photoacoustic spectra, ^1H NMR spectra, molar conductance and differential scanning calorimetry(DSC). The ligand and the Zn complex show liquid crystalline behavior. According to the DSC thermogram of the Zn complex, it exhibits a lower phase transition temperature -7. 453℃ and a wide mesophase temperature span, 77℃.     

Luminescence of Hybrid Nanostructures of InP@ZnS Colloidal Quantum Dots and <Emphasis Type="Italic">meso</Emphasis>-Tetra(3-pyridyl)porphyrin Molecules

The formation of hybrid nanostructures consisting of InP@ZnS colloidal quantum dots and mesotetra(3-pyridyl)porphyrin molecules adsorbed on the quantum dots has been studied. In such nanostructures, strong quenching of quantum dot luminescence and an increase in the emission intensity of porphyrin are observed due to nonradiative resonance energy transfer from colloidal quantum dots to porphyrin.     

Molecular organization and electrochemical reduction of a Ni(II)Porphyrin complex in LB films

In this work, mixed films of a tetra-cationic porphyrin, Ni(II)TMPyP, and an anionic phospholipid, DMPA, in molar ratio of 1:4, were formed at the air–water interface and transferred onto glass and optically transparent indium tin oxide (ITO) electrodes. Transmission spectroscopy (on glass and ITO) and cyclic voltammetry (on ITO) were used to infer the molecular organization and the electrochemical reduction of these LB films. Likewise, we compare the electrochemical reduction of the Ni(II)TMPyP in water solution with that in LB films. The porphyrin molecules in water solution show three two-electron reduction waves, which are related to the two-electron reduction of the central ring of the porphyrin and to the one-electron reductions of the four methyl–pyridyl groups of the molecule, respectively, while only two reversible one-electron reduction waves are observed in LB films corresponding to the reduction of the central ring of the porphyrin and to the Ni(II) to Ni(I) reduction, respectively.     

The electrocatalytic reactions of adenine, guanine, H2O, H2O2, N2H4, and l -cysteine catalyzed by poly(Ni(4-TMPyP)) film-modified electrodes

Electrochemical preparation of poly(nickel tetrakis(N-methyl-4-pyridyl)porphyrin) tetratosylate (poly-Ni(4-TMPyP)) produces stable and electrochemically active films in strong and weak basic aqueous solutions. These films were produced on glassy carbon and gold electrodes. The electrochemical quartz crystal microbalance and cyclic voltammetry were used to study the in situ growth of poly(Ni(4-TMPyP)) films. The electrochemical properties of poly(Ni(4-TMPyP)) films indicate that the redox process was confined in to the immobilized film. The electrochemical quartz crystal microbalance results showed an ion exchange reaction for the redox couple. The polymer films showed one new redox couple when transferred to strong and weak basic aqueous solutions and the formal potential was found to be pH dependent. The electrocatalytic oxidation of H₂O by a nickel tetrakis(N-methyl-4-pyridyl)porphyrin film-modified electrode was also performed. The mechanism of oxygen evolution was determined by cyclic voltammetry, chronoamperometry and rotating ring disc electrode methods. The oxygen evolution was determined by a bicatalyst system using hemoglobin, and iron tetrakis (N-methyl-2-pyridyl)porphyrin as catalyst to detect the oxygen by electrocatalytic reduction. The electrocatalytic oxidations of adenine, guanine, H₂O₂, N₂H₄, NH₂OH, and l-cysteine by the film-modified electrode obtained from water-soluble nickel porphyrin were also investigated.     

Properties of meso-tetrakis (4-n-alkanoyloxyphenyl) porphyrin liquid crystal Co and Ni complexes

Six series of meso-tetrakis (4-n-alkanoyloxyphenyl) porphyrin Co and Ni complexes (12 kinds) were reported. Nine of the compounds were found to exhibit liquid crystal properties and display a hexago-nal columnar discotic columnar (Colh) phase. Molecular structure of all synthesized compounds was confirmed by IR, UV, MS, 1H NMR, and elemental analysis. These liquid crystalline compounds have been studied by cyclic voltammetry, luminescence, and surface photovoltage spectroscopy.     

β to β Terpyridylene-bridged porphyrin nanorings

β β to Terpyridine bridged cyclic porphyrin dimer, trimer, tetramer and pentamer were obtained through one-pot Suzuki-Miyaura crossing coupling reaction in good yields with template free. These porphyrin nanorings possess high fluorescence quantum yields and large extinction coefficients.     

新型尾式5-(4-烟酸酰氧基己氧基)苯基-5,10,15-三苯基卟啉及其配合物的合成、表征和电化学性能

合成了新型尾式5-(4-烟酸酰氧基己氧基)苯基-5,10,15-三苯基卟啉及其Mn, Fe, Co, Ni, Cu, Zn配合物, 并用红外光谱、紫外-可见光谱、核磁共振氢谱、元素分析和质谱对化合物的结构进行了确认, 通过循环伏安法研究了化合物的电化学性质. 结果表明, 卟啉配体与其配合物的紫外光谱、红外光谱和核磁共振氢谱都有很大区别, 锰与铁配合物的循环伏安曲线和配体及镍、铜、锌的配合物不同, 除了卟啉环发生氧化还原反应外, 还发生了金属离子的氧化还原反应.     

Pyrrole functionalised metalloporphyrins as electrocatalysts for the oxidation of nitric oxide

Pyrrole-functionalised tetracarboxyphenyl porphyrin and trimethoxyphenylcarboxy-phenyl porphyrin containing Ni, Mn and Pd as the central metal ion were used to modify Pt-disk microelectrodes (∅ 50 μm) (by repetitive cyclic voltammetry, dip-dry and pulse-amperometry methods) for the detection of nitric oxide (NO). Electrodes modified with Mn(II) trimethoxyphenylcarboxyphenyl porphyrin using the pulse amperomery approach, were found to be sensitive, stable and fast in response towards the oxidation of NO. Thus, they were used for the detection of NO release from a population of transformed human umbilical vein endothelial cells (T-HUVEC) into a droplet of electrolyte solution following stimulation with vascular endothelial growth factor (VEGF). The electrode surface was covered with an additional layer of Nafion® to prevent interference from anionic molecules such as nitrite.     

四(4－N-吡啶基)卟啉衍生物的合成及表征

阳离子卟啉配体;配合物;还原电位;四(4－N-吡啶基)卟啉衍生物的合成及表征     

烟酸-卟啉二元化合物的合成、表征及其电化学性质

通过亲核取代反应合成了3个新的烟酸-卟啉二元化合物, 并用红外光谱、紫外-可见光谱、核磁共振氢谱、元素分析和质谱对化合物的结构进行确认, 通过循环伏安法研究了其电化学性质.