使用基于蒽二脒二膦酸和单-膦酸衍生物的荧光检测1进行了研究。的二脒1种形式1:1和1:2个络合物分别与二膦酸和单-膦酸衍生物,并呈现出蓝色荧光(λ EM 中的DMSO溶液= 432-442纳米)。脒鎓膦酸酯(复合物形成)和离解amidinum的形成(λ EM = 468纳米作为宽带)通过在荧光波长的差异区分,并且通过DOSY NMR光谱和TD-DFT计算证实。与二am 1形成1:2络合物 提出了在甲基膦酸之间具有另外的分子间氢键的甲基膦酸。
Fluorescent detection of amidinium–carboxylate and amidinium formation using anthracene-based diamidine: an application for the analysis of dicarboxylic acid binding
摘要:
An anthracene-based diamidine (1) 'turn-on' fluorescent probe for the detection of dicarboxylic acids has been designed and synthesized. The fluorescence spectra of the diamidine 1 with carboxylic acids that showed two different fluorescence bands, which corresponded to the amidinium-carboxylate (lambda(em)=430-440 nm), and amidinium (lambda(em)=460-470 nm as a broad band) formation, were confirmed by DOSY NMR and TD-DFT calculations. These different fluorescence bands showed the binding mode of carboxylic acids and the stability of formed complexes toward diamidine 1. The fluorescent detection of amidinium carboxylate formation using diamidine 1 was applicable to the detection of alpha,omega-dicarboxylic acids (C-6-C-13) and succeeded in the detection of alpha,omega-dicarboxylic acid (adipic acid) in human urine. (C) 2012 Elsevier Ltd. All rights reserved.
Recognition of dicarboxylic acids and diphosphonic acids using anthracene-based diamidine: formation of amidinium-carboxylate and amidinium-phosphonate salt bridges in a protic solvent
ABSTRACT The formation of a stable ‘amidinium-carboxylate’ salt bridge, even in a competing protic solvent (MeOH), was observed based on the binding experiments of anthracene-based diamidine (1) and dicarboxylic acids. The formation of 1:1 binding complexes of the diamidine 1 and dicarboxylic acids was confirmed by DOSY NMR, ESI-Mass, titration experiments and a single crystal X-ray analysis. Similarly