Rational or Statistical Routes from 1-Acyldipyrromethanes to <i>meso</i>-Substituted Porphyrins. Distinct Patterns, Multiple Pyridyl Substituents, and Amphipathic Architectures
作者:Dilek Kiper Dogutan、Marcin Ptaszek、Jonathan S. Lindsey
DOI:10.1021/jo800588n
日期:2008.8.1
New methodology is described for the synthesis of porphyrins bearing four (A4, cis-A2B2, cis-ABC2, trans-A2B2) or fewer (A, cis-AB, cis-A2, trans-A2) meso substituents. The method entails condensation of two 1-acyldipyrromethanes in the presence of a metal salt (MgBr2, 3 mol equiv) and a noncoordinating base (DBU, 10 mol equiv) in a noncoordinating solvent (toluene) with heating (conventional or microwave
描述了一种新的合成方法,用于合成带有四个(A 4,顺式-A 2 B 2,顺式-ABC 2,反式-A 2 B 2)或更少(A,顺式-AB,顺式-A 2,反式- A 2)内消旋取代基。该方法需要在金属盐(MgBr 2,3摩尔当量)和非配位碱(DBU,10摩尔当量)在非配位溶剂(甲苯)中加热(常规或微波辐射)并暴露于空气中。反式-A 2 B 2-或反式-A 2-卟啉的合理合成是通过两个相同的1-酰基二吡咯甲烷的缩合反应实现的。各种内消旋的统计综合通过两个不相同的1-酰基吡咯烷甲烷的缩合获得取代的卟啉。两种途径都具有吸引人的特征,包括(1)无加扰;(2)高浓度(100 mM)的大环形成步骤中的高收率(最高60%);(3)合理的范围(芳基,杂芳基,烷基或无取代基),(4)微波辐射反应时间短(〜2 h),(5)容易进行脱金属的卟啉镁产物和(6)色谱纯化简便。统计途径的主要优点是获得了顺式取代的卟啉,而没有相应的反式异构体。例如,A
Bioinspired nanophotosensitizers: synthesis and characterization of porphyrin–noble metal nanoparticle conjugates
作者:Jayeeta Bhaumik、Gitanjali Gogia、Seema Kirar、Lekshmi Vijay、Neeraj S. Thakur、Uttam C. Banerjee、Joydev K. Laha
DOI:10.1039/c5nj02056e
日期:——
Conjugatable and compact porphyrinic photosensitizer nanoparticle conjugates were developed through rational synthesis followed by conjugation with noble metal nanoparticles.
可共轭且紧凑的卟啉光敏剂纳米粒子共轭物是通过合理合成后与贵金属纳米粒子结合而开发的。
Investigation of Stepwise Covalent Synthesis on a Surface Yielding Porphyrin-Based Multicomponent Architectures
作者:Izabela Schmidt、Jieying Jiao、Patchanita Thamyongkit、Duddu S. Sharada、David F. Bocian、Jonathan S. Lindsey
DOI:10.1021/jo052650x
日期:2006.4.1
amine, bromo, carboxy) for elaboration after surface attachment. A second set designed for in situ dyad construction incorporates a single functional group (alcohol, isothiocyanato) that is complementary to the functional group in the base porphyrins. A third set designed for in situ multad construction incorporates two identical functional groups (bromo, alcohol, active methylene, amine, isothiocyanato)
METHOD FOR MANUFACTURING NITROGEN-CONTAINING CARBON ALLOY, NITROGEN-CONTAINING CARBON ALLOY, AND FUEL CELL CATALYST
申请人:FUJIFILM Corporation
公开号:US20150376218A1
公开(公告)日:2015-12-31
Provided is a method for manufacturing a nitrogen-containing carbon alloy having a sufficiently high oxygen reduction reaction activity, a nitrogen-containing carbon alloy, and a fuel cell catalyst. The method for manufacturing a nitrogen-containing carbon alloy comprises sintering a precursor which contains a nitrogen-containing compound and an inorganic metal salt, the nitrogen-containing compound having at least one heteroaromatic ring and a conjugated heterocycle, and the conjugated heterocycle having 12 or larger number of ring-forming atoms.
The reaction between 5-(4-pyridyl)dipyrrylmethane and aromatic aldehydes affords meso-arylsubstituted trans-A2B2 di(4-pyridyl)porphyrins which are key building blocks in the metal-mediated self-assembling of supramolecular structures. A careful optimization of the reaction conditions allowed us to obtain 5,15-diphenyl-10,20-di(4-pyridyl)porphyrin (P1), and two analogues bearing on the meso-phenyl substituents
5-(4-吡啶基)二吡咯甲烷与芳族醛之间的反应提供了内-芳基取代的反式-A 2 B 2二(4-吡啶基)卟啉,它们是金属介导的超分子结构自组装的关键组成部分。仔细优化反应条件使我们获得了5,15-二苯基-10,20-二(4-吡啶基)卟啉(P1)和两个带有内消旋-苯基取代基的类似物两个二丙基-(P4)或二己基-烷基链(P5),产率为53-63%。卟啉 P1与Re(CO 5)Br反应得到预期的4 + 4 Re(I)–卟啉金属环已通过红外,NMR和UV-Vis(吸收和发射)光谱学和客体夹杂物研究得到了充分表征。出乎意料的是,将烷基链添加到卟啉片段中,这增加了卟啉在有机溶剂中的溶解度,对与Re(I)的加合物具有相反的作用。实际上,Re(CO 5)Br与卟啉P4,5之间的反应产生了非常难溶的物质,从而妨碍了它们的完全表征。