Functionalised benzo[a]phenoxazine dyes as long-wavelength fluorescent probes for amino acids
摘要:
A series of monoreactive functional benzo[a]phenoxazinium chlorides with a carboxyl, hydroxyl, amine or chloromethyl group were used as labels in the preparation of long-wavelength fluorescent amino acid bioconjugates. UV-visible and fluorescence studies of all compounds were carried out in ethanol and water at physiological pH. The absorption and emission of all compounds synthesised were in the range 555-640 nm and 632-681 nm, respectively. (c) 2006 Elsevier Ltd. All rights reserved.
Clickable fluorophores for biological labeling—with or without copper
作者:Péter Kele、Xiaohua Li、Martin Link、Krisztina Nagy、András Herner、Krisztián Lőrincz、Szabolcs Béni、Otto S. Wolfbeis
DOI:10.1039/b907741c
日期:——
for fluorescentlabeling of biomolecules is presented by examples on model frameworks representing major biopolymer building blocks. The versatility of these dyes is presented in cell labeling experiments as well as by labeling the azide modified surface glycans of CHO-cells either by copper catalyzed or copper-free clickreaction. These dyes are expected to have a large variety of applications in (bio)orthogonal
New NIR dyes based on quinolizino[1,9-hi]phenoxazin-6-iminium chlorides: synthesis, photophysics and antifungal activity
作者:B. Rama Raju、Maria Inês P.S. Leitão、Maria João Sousa、Paulo J.G. Coutinho、M. Sameiro T. Gonçalves
DOI:10.1016/j.dyepig.2019.107870
日期:2020.2
9-hi]phenoxazinium chlorides were evaluated against the yeast Saccharomyces cerevisiae in a broth microdilution assay. It was found that their antifungal activity depended on the substituent at 14-amino position in benzo[a]quinolizino[1,9-hi]phenoxazin-14(5H)-iminium chlorides, and also on the addition of a fused benzene ring, which occurs in naphtho[2,3-a]quinolizino[1,9-hi]phenoxazin-14(5H)-iminium chloride. The
制备了一系列新的基于聚吲哚和萘-1-胺衍生物或蒽-1-胺的喹啉并[1,9- hi ]苯恶嗪鎓染料。这些喹啉并[1,9- hi ]苯恶嗪氯化物的N-末端含有芳族或脂族取代基,以及诸如氯,羟基和羧基的官能团。在酸性和碱性条件下,在无水乙醇和水性介质中研究了这些化合物的光物理行为。这些荧光团分别显示最大675 nm和712 nm的最大吸收和发射,可作为生物学测定中的替代传感工具。 在肉汤微量稀释试验中,针对酵母酿酒酵母评估了所有喹喔啉[1,9- hi ]苯氧嗪鎓氯化物。发现它们的抗真菌活性取决于苯并[ a ]喹啉并[1,9 - hi ]苯恶嗪-14(5 H)-亚胺氯化物中14-氨基位置的取代基,还取决于稠合苯环的添加。发生在萘并[2,3- a ]喹啉并[ 1,9 - hi ]苯恶嗪-14(5 H)-亚氯化亚胺中。苯并[ a ]喹啉并[1,9 - hi ]苯恶嗪-14(5 H)-在杂环核的14-氨基位置具有3-氯丙基取代基的氯化亚胺。
Click Chemistry Based Method for the Preparation of Maleinimide-Type Thiol-Reactive Labels
作者:Martin Link、Xiaohua Li、Jana Kleim、Otto S. Wolfbeis
DOI:10.1002/ejoc.201001085
日期:2010.12
Maleinimides are widely used to label proteins and to derivatize thiols. The so-called click reaction was shown to allow the efficient introduction of the maleinimido group into azido-modified fluorophores (benzoxazines) by reacting them with an alkyne-modified maleinimide to yield new thiol-reactive fluorescent labels 5–7. The reaction proceeds under mild experimental conditions and provides a new
A near-infrared fluorescent probe ENBO-ML210 was developed. In vitro and in vivo imaging results showed that it could target and visualize GPX4 in H1299 cells, exhibiting the potential for diagnosis of non-small lung cancer.
Overcoming the Oxygen Dilemma in Photoredox Catalysis: Near‐Infrared (NIR) Light‐Triggered Peroxynitrite Generation for Antibacterial Applications
作者:Zhiqiang Shen、Shaoqiu Zheng、Yuanmeng Fang、Guoying Zhang、Chen Zhu、Shiyong Liu、Jinming Hu
DOI:10.1002/anie.202219153
日期:——
near-infrared photocatalyst, enabling the simultaneous generation of superoxide anions (O2⋅−) and nitric oxide (NO) via type I photosensitization and oxygen-tolerant photoredoxcatalysis, respectively. The combination of O2⋅− and NO leads to peroxynitritegeneration under NIRlight irradiation, showing great promise in antibacterial and antibiofilm applications.