New Synthetic Amino Acids for the Design and Synthesis of Peptide-Based Metal Ion Sensors
摘要:
The syntheses of two new nonstandard amino acids, Flu (6) and YBp (20), and a new synthesis of Dmd (12) are reported. These residues exhibit fluorescence, metal-coordination, and fluorescence-quenching properties, respectively. These building blocks have been incorporated into peptides via solid phase peptide synthesis to afford the prototype fur a photoinduced electron transfer-based metal ion chemosensor. The fluorescence of the peptides is modulated upon metal binding. This results from a metal. ion-induced conformational change that brings the side chains of the Flu and Dmd amino acids into proximity, thereby favoring photoinduced electron transfer (PET) fluorescence quenching.
[EN] ? (PI)-CONJUGATED FLUOROIONOPHORES AND METHOD FOR DETERMINING AN ALKALI ION<br/>[FR] FLUOROIONOPHORES p-CONJUGUÉS ET MÉTHODE DE DOSAGE D'UN ION ALCALIN
申请人:UNIV POTSDAM
公开号:WO2012120141A1
公开(公告)日:2012-09-13
The present invention relates to π-conjugated fluoroionophores, methods for their preparation, and their use and a method for determining an alkali ion. Fluoroionophoric compounds of the general formula I are described Ionophore – π-Linker - Fluorophore (I) wherein the Ionophore is an anilino containing crown ether or cryptand with one or more anilino donor moieties as electron donors, forming a stable complex with an alkali metal ion the π-Linker is an aromatic or heteroaromatic conjugative linking moiety, and the Fluorophore is an electron acceptor moiety. Variation of the ionophoric unit offers a broad spectrum of detectable K+ and Na+ -concentrations, ranging from high concentration around 800 mM down to very low concentrations around 3 mM. The fluoroionophores have great potential for application in fluorescent optode system based blood analyzing equipment for methods and kits for the determination of K+ and Na+ concentrations in biological systems, either in vitro or in vivo, using embodiments of the disclosed fluoroionophores.
Systematic Investigation of Photoinduced Electron Transfer Controlled by Internal Charge Transfer and Its Consequences for Selective PdCl<sub>2</sub>Coordination
作者:Thomas Schwarze、Wulfhard Mickler、Carsten Dosche、Roman Flehr、Tillmann Klamroth、Hans-Gerd Löhmannsröben、Peter Saalfrank、Hans-Jürgen Holdt
DOI:10.1002/chem.200902281
日期:2010.2.8
fluorophore–spacer–receptor format were prepared for detection of PdCl2 by fluorescence enhancement. The fluorescent probes 1–13 consist of a fluorophore group, an alkyl spacer and a dithiomaleonitrile PdCl2 receptor. First, varying the length of the alkylene spacer (compounds 1–3) revealed a dominant through‐space pathway for oxidative photoinducedelectrontransfer (PET) in CH2‐bridged dithiomaleonitrile fluoroionophores
Photophysics of aromatic thiourea derivatives and their complexes with anions. Fast and ultrafast spectroscopic investigations
作者:Tiziana Del Giacco、Benedetta Carlotti、Stefano De Solis、Arianna Barbafina、Fausto Elisei
DOI:10.1039/b927442a
日期:——
with nano- and femto-second time resolution. A complete picture of the excited statedeactivation pathways of 1 and 2, where the main operative processes were fluorescence, intersystem crossing and internal conversion, was obtained. Even if steady-state measurements suggest that 1 and 2 selectively interact in the ground state with the anions H2PO4− and AcO−, time-resolved investigations demonstrate that
为了收集有关荧光之间相互作用机理的详细信息 硫脲 衍生物和阴离子, 9- [4-(三氟甲基)苯基硫脲基甲基]蒽(1)与之对应10-氰基蒽合成(2)的衍生物并进行了研究。二甲基亚砜 和 机械化 通过使用吸收和发射稳态技术,在不存在和存在不同阴离子的情况下(醋酸-,H 2 PO 4 -,HSO 4 - ,和溴−)。阴离子识别机理的广泛研究还通过时间分辨的瞬态吸收光谱法进行,时间分辨率为纳秒和飞秒。获得了1和2的激发态失活途径的完整图片,其中主要的操作过程是荧光,系统间杂交和内部转化。即使稳态测量表明, 1和2选择性地与阴离子小时基态相互作用2 PO 4 -和醋酸-,时间分辨的研究表明,底物能够使所有四个阴离子络合。这类配合物的光物理特性已得到充分表征。阴离子主要修改的最低激发单重态的寿命,特别是在H的情况下, 2 PO 4 -和醋酸-,荧光发射和三重态形成的效率。特别是,没有发现进一步灭活过程
Organocatalytic Asymmetric Synthesis of Versatile γ-Lactams
作者:Thomas B. Poulsen、Gustav Dickmeiss、Jacob Overgaard、Karl Anker Jørgensen
DOI:10.1002/anie.200800329
日期:2008.6.9
Fluorescent studies of two new binaphthyl–azacrown–anthracene fluorophores with metal ions and chiral guests: dual fluorescent detection via binaphthyl and anthracene groups
作者:Kwang Soo Kim、Eun Jin Jun、Sook Kyung Kim、Hee Jung Choi、Jaeduk Yoo、Chang-Hee Lee、Myung Ho Hyun、Juyoung Yoon
DOI:10.1016/j.tetlet.2007.02.028
日期:2007.4
Two new binaphthyl-azacrown-anthracene fluorophores were synthesized. These new fluorescent receptors exhibited large fluorescent changes with aqueous Hg2+, Cu2+ and Zn2+. Interestingly, the fluorescent emissions from the binaphthyl and anthracene groups using different excitation wavelengths showed different patterns in the presence of metal ions. The chiral recognitions of these receptors with chiral ammonium guests were also examined. (c) 2007 Published by Elsevier Ltd.