芳香胺(例如苯胺)的自由基阳离子的去质子化通常比其他裂解反应要慢得多。在这里,我们报告了一种立体电子效应,其中涉及苯胺基团从苯环平面外的扭曲,从而导致去质子化的反应率显着提高。对去质子化速率常数作为苯胺自由基阳离子p K a的函数的定量研究(布朗斯台德图)表明,这种作用不仅仅是由于反应热力学的变化。通过将这种立体电子效应与羧酸盐作为碱的共价结合起来,苯胺自由基阳离子经历了非分子去质子化,速率常数高达10 8 s - 1描述了即使在不利的质子介质中也是如此。
芳香胺(例如苯胺)的自由基阳离子的去质子化通常比其他裂解反应要慢得多。在这里,我们报告了一种立体电子效应,其中涉及苯胺基团从苯环平面外的扭曲,从而导致去质子化的反应率显着提高。对去质子化速率常数作为苯胺自由基阳离子p K a的函数的定量研究(布朗斯台德图)表明,这种作用不仅仅是由于反应热力学的变化。通过将这种立体电子效应与羧酸盐作为碱的共价结合起来,苯胺自由基阳离子经历了非分子去质子化,速率常数高达10 8 s - 1描述了即使在不利的质子介质中也是如此。
Non-fluorescent quencher compounds and biomolecular assays
申请人:——
公开号:US20030082547A1
公开(公告)日:2003-05-01
Bis-diazo,triaryl and aryldiazo-N-arylphenazonium quencher moieties, substituted with electron-withdrawing and electron-donating substituents which induce polarity in the delocalized aryl/diazo ring systems, are useful as labels when attached to biomolecules such as polynucleotides, nucleosides, nucleotides, and polypeptides. The quencher moieties are non-fluorescent and accept energy from fluorescent reporter labels by any energy-transfer mechanism, such as FRET.
Fluorescence quencher compositions are useful in preparing quencher labelled biomolecules for various molecular biology assays based on fluorescence detection.
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NON-FLUORESCENT QUENCHER COMPOUNDS AND BIOMOLECULAR ASSAYS
申请人:EWING Gregory J.
公开号:US20090105452A1
公开(公告)日:2009-04-23
Bis-diazo, triaryl and aryldiazo-N-arylphenazonium quencher moieties, substituted with electron-withdrawing and electron-donating substituents which induce polarity in the delocalized aryl/diazo ring systems, are useful as labels when attached to biomolecules such as polynucleotides, nucleosides, nucleotides and polypeptides. The quencher moieties are non-fluorescent and accept energy transfer from fluorescent reporter labels by any energy-transfer mechanism, such as FRET.
Fluorescence quencher compositions are useful in preparing quencher labeled biomolecules for various molecular biology assays based on fluorescence detection.
Non-Fluorescent Quencher Compounds and Biomolecular Assays
申请人:Ewing Gregory J.
公开号:US20110245462A1
公开(公告)日:2011-10-06
Bis-diazo, triaryl and aryldiazo-N-arylphenazonium quencher moieties, substituted with electron-withdrawing and electron-donating substituents which induce polarity in the delocalized aryl/diazo ring systems, are useful as labels when attached to biomolecules such as polynucleotides, nucleosides, nucleotides and polypeptides. The quencher moieties are non-fluorescent and accept energy transfer from fluorescent reporter labels by any energy-transfer mechanism, such as FRET.
Fluorescence quencher compositions are useful in preparing quencher labeled biomolecules for various molecular biology assays based on fluorescence detection.
[EN] NON-FLUORESCENT QUENCHER COMPOUNDS AND BIOMOLECULAR ASSAYS<br/>[FR] COMPOSES EXTINCTEURS NON-FLUORESCENTS ET TESTS BIOMOLECULAIRES
申请人:APPLERA CORP
公开号:WO2003019145A2
公开(公告)日:2003-03-06
Bis-diazo,triaryl and aryldiazo-N-arylphenazonium quencher moieties, substituted with electron-withdrawing and electron-donating substituents which induce polarity in the delocalized aryl/diazo ring systems, are useful as labels when attached to biomolecules such as polynucleotides, nucleosides, nucleotides, and polypeptides. The quencher moieties are non-fluorescent and accept energy from fluorescent reporter labels by any energy-transfer mechanism, such as FRET. Fluorescence quencher compositions are useful in preparing quencher labelled biomolecules for various molecular biology assays based on fluorescence detection.