癌症和细菌感染严重威胁着人类的健康。迫切需要开发一种具有“二合一”功能的图像引导光敏剂,该光敏剂可同时用于有效的癌细胞消融和快速的细菌灭活。在这个项目中,我们设计并制备了两种具有强电子推挽效应的聚集诱导发射发光剂(AIEgens)(称为TPEPy-I和TPEPy-PF6)。它们具有近红外(NIR)发射,高1 O 2量子产率高达0.93,并且线粒体具有荧光开启效应。在白光照射下,两个靶向线粒体的AIEgens均表现出高效的HeLa细胞光动力消融以及革兰氏阳性金黄色葡萄球菌和革兰氏阴性大肠杆菌的出色光动力失活。随时间变化的密度泛函理论(TD-DFT)结果表明,与TPEPy-PF6相比,TPEPy-1可以轻松产生三重态,这是形成1 O 2的先决条件。此外,碘化物阴离子的积极作用使TPEPy-I与癌细胞消融和细菌灭活相比具有更高的光动力学功效。TPEPy-PF6。
Chromo-Fluorogenic Detection of Nerve-Agent Mimics Using Triggered Cyclization Reactions in Push-Pull Dyes
作者:Ana M. Costero、Margarita Parra、Salvador Gil、Raúl Gotor、Pedro M. E. Mancini、Ramón Martínez-Máñez、Félix Sancenón、Santiago Royo
DOI:10.1002/asia.201000058
日期:——
results in a hypsochromic shift of the absorption band of the dyes. Similar reactivity studies are also carried out with other “non‐toxic” organophosphorus compounds, but no changes in the UV/Vis spectra were observed. The emission behaviour of the reagents in acetonitrile and water–acetonitrile 3:1 v/v mixtures is also studied in the presence of nerve‐agent simulants and other organophosphorous derivatives
偶氮和二苯乙烯衍生物(的家族1,2,3,4,5,6,7,8,9)的合成,并且在神经剂模拟物,磷酸二乙酯的存在下(DCP)其色光荧光行为,二异丙基(DFP)和乙腈中的氰基磷酸二乙酯(DCNP),以及用MES缓冲的pH 5.6的水/乙腈(3:1 v / v)混合溶液。制备的化合物包含2-(2- N,N-二甲基氨基苯基)乙醇或2-[(2- N,N-二甲基氨基)苯氧基]乙醇反应性基团,是染料共轭π-系统的一部分,能够与膦酸酯底物发生酰化反应,随后发生快速的分子内N反应烷基化。神经药模拟触发的环化反应将二甲基氨基基团转变为季铵盐,从而引起离域系统电子性质的变化,从而导致染料吸收带的变色移动。其他“无毒”有机磷化合物也进行了类似的反应性研究,但未观察到UV / Vis光谱的变化。在存在神经试剂模拟剂和其他有机磷衍生物的情况下,还研究了乙腈和水-乙腈3:1 v / v混合物中试剂的发射行为。之间的反
Metal-free reduction of unsaturated carbonyls, quinones, and pyridinium salts with tetrahydroxydiboron/water
A series of unsaturated carbonyls, quinones, and pyridinium salts have been effectively reduced to the corresponding saturated carbonyls, dihydroxybenzenes, and hydropyridines in moderate to high yields with tetrahydroxydiboron/water as a mild, convenient, and metal-free reduction system. Deuterium-labeling experiments have revealed this protocol to be an exclusive transfer hydrogenation process from
Development of novel cell-permeable DNA sensitive dyes using combinatorial synthesis and cell-based screeningElectronic supplementary information (ESI) available: experimental section. See http://www.rsc.org/suppdata/cc/b3/b303960a/
作者:Jae Wook Lee、Michelle Jung、Gustavo R. Rosania、Young-Tae Chang
DOI:10.1039/b303960a
日期:——
A novel cell-permeable DNA fluorescence sensor was developed based on combinatorially-created styryl dyes and cell-based localization screening.
基于组合生成的斯蒂尔染料和细胞定位筛选,研制了一种新型的细胞渗透性DNA荧光传感器。
Reactions of isoquinoline derivatives with pyridinium salts yielding 4-naphthylpyridines
作者:S. P. Gromov、M. V. Fomina
DOI:10.1023/b:rucb.0000037861.00184.82
日期:2004.4
ring occurs in the reactions of isoquinolinium salts with 4-methylpyridinium salts through the intermolecular transformation of the isoquinoline bicyclic system involving the methyl group of the pyridinium salt. The reaction occurs under the action of methylammonium sulfite in an aqueous medium on heating. This method provides ring transformation not only for isoquinolinium salts but even for unsubstituted
We report for the first time that irradiation of four different citric acid-derived carbon dots (CDs), in the absence of any other redox mediators, promotes an organic reaction.