Direct Wiring of Cytochrome <i>c</i>'s Heme Unit to an Electrode: Electrochemical Studies
作者:Jianjun Wei、Haiying Liu、Allison R. Dick、Hiromichi Yamamoto、Yufan He、David H. Waldeck
DOI:10.1021/ja025518c
日期:2002.8.1
of cytochromec on the surface of chemically modified electrodes is demonstrated and used to investigate the protein's electron-transferkinetics. Mixedmonolayer films of alkanethiols and omega-terminated alkanethiols (terminated with pyridine, imidazole, or nitrile groups that are able to ligate with the heme) are used to adsorb cytochromec to the surface of gold electrodes. The use of mixed films
展示了一种将细胞色素 c 固定在化学修饰电极表面的新策略,并用于研究蛋白质的电子转移动力学。链烷硫醇和欧米茄封端的链烷硫醇(以吡啶、咪唑或能够与血红素结合的腈基团封端)的混合单层膜用于将细胞色素 c 吸附到金电极的表面。与纯薄膜相比,使用混合薄膜可以使吸附的细胞色素的浓度保持稀释,并确保其环境具有更高程度的均匀性。使用电化学方法和扫描隧道显微镜研究吸附的蛋白质。
Imidazolium Polyesters: Structure-Property Relationships in Thermal Behavior, Ionic Conductivity, and Morphology
作者:Minjae Lee、U. Hyeok Choi、David Salas-de la Cruz、Anuj Mittal、Karen I. Winey、Ralph H. Colby、Harry W. Gibson
DOI:10.1002/adfm.201001878
日期:2011.2.22
conductivities of the mono‐imidazoliumpolyesters (4 × 10−6 to 3 × 10−5 S cm−1) are higher than those of the corresponding bis‐imidazoliumpolyesters (4 × 10−9 to 8 × 10−6 S cm−1), even though the bis‐imidazoliumpolyesters have higher ion concentrations. Counterions affect ionic conduction significantly; all polymers with TFSI− counterions have higher ionicconductivities than the hexafluorophosphate analogs
合成并表征了新的双(ω-羟烷基)咪唑鎓盐和1,2-双[ N-(ω-羟烷基)咪唑鎓]乙烷盐;大多数盐是室温离子液体。这些羟基末端官能化的离子液体与二酰氯聚合,生成在主链中嵌入咪唑阳离子的聚酯。通过X射线散射,发现四种聚酯在室温下为半结晶态:单咪唑C 11癸二酸酯C 6(4e),单咪唑C 11癸二酸酯C 11 11(4c),双咪唑)乙烷-C 6-癸二酸酯-C 6(5a)和双(咪唑)乙烷-C11癸二酸酯C 11(5c),全都带有六氟磷酸根抗衡离子。其他咪唑聚酯,包括所有那些与双(三氟甲烷磺酰)亚胺(TFSI - )抗衡离子,在室温下是无定形的。单咪唑鎓聚酯的室温离子电导率(4×10 -6至3×10 -5 S cm -1)高于相应的双咪唑鎓聚酯的室温离子电导率(4×10 -9至8×10 -6 S cm -1),即使双咪唑鎓聚酯具有更高的离子浓度。抗衡离子会严重影响离子传导。所有具有TFSI的聚合物
Resonance Raman and Electrocatalytic Behavior of Thiolate and Imidazole Bound Iron Porphyrin Complexes on Self Assembled Monolayers: Functional Modeling of Cytochrome P450
Electrodes bearing thiolate and imidazole coordinated iron porphyrin catalysts are constructed and characterized using resonanceRaman spectroscopy, absorption spectroscopy, and electrochemistry. The cyclic voltammetry data and their pH dependences are used to establish the nature of the exchangeable trans ligands in both of these cases. In situ monitoring of partially reduced oxygen species (PROS)
l-alanine substituents on both rims was investigated upon addition of guest molecules having pyridinium or imidazole moieties and long alkyl chains. The d- and l-alanine-substituted pillar[5]arenes exhibited pS and pR planar chirality, respectively. However, this planar chirality was inverted upon inclusion of certain achiral molecules, comprising pyridinium or imidazole moieties and long alkyl chains with
The zwitterion effect in proton exchange membranes as synthesised by polymerisation of bicontinuous microemulsions
作者:Leong Ming Gan、Pei Yong Chow、Zhaolin Liu、Ming Han、Chai Hoon Quek
DOI:10.1039/b508035e
日期:——
The bicontinuous microemulsions consisting of a polymerisable zwitterionic surfactant 3-((11-acryloyloxyundecyl)imidazolyl) propyl sulfonate (AIPS) and other monomers can be cross-polymerised to form good proton conductive membranes.