Fluorescent aza-cyclophanes derived from diethylenetriaminepentaacetic acid (DTPA), and their complexation with Gd(III)

Soberanes, Yedith; Arvízu-Santamaría, Ana Gabriela; Machi, Lorena; Navarro, Rosa Elena; Inoue, Motomichi

doi:10.1016/j.poly.2012.01.007

Cited by 12 publications

(1 citation statement)

References 26 publications

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“…We have searched some special compounds, which can recognize melamine, to modify the Eu III -dtpa complex. As we know, the recognition capability between molecule themselves should be strongest, so we choose melamine as the antenna moiety to synthesis Eu Ш -dtpa-bis(melamine) [19][20][21]. The interaction of π-π* conjugation between melamine molecules was strongest, so the melamine could be catched by the Eu Ш -dtpa-bis(melamine) complex more easily [22,23], in contrast to other analogues, such as cyanuric acid (Cya), cyanuric chloride (Cyach), trichloro isocyanuric acid (Isocya) and acetoguanamine (Methyla).…”

Section: Introductionmentioning

confidence: 99%

Design and synthesis of a novel lanthanide fluorescent probe (EuIII-dtpa-(bis)melamine) and application in melamine detection in milk products

Jiang

Tian

Yang

et al. 2017

Sensors and Actuators B: Chemical

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highly selective fluorescence "turn-on" response. The competitive assay showed that the presence of other analogues (cyanuric acid, cyanuric chloride, trichloroisocyanuric acid and acetoguanamine) rarely affected the turn-on fluorescence intensity in probing melamine. The obtained results displayed a linear correlation beteewn melamine concentration and fluorescence intensity. The linear equation was y = 38.68x + 568.32 (R 2 = 0.9972) with melamine concentration ranged from 5-100 µmol/L. When melamine concentration reaches 100 µmol/L, the fluorescence intensity becomes the maximum. The formed Eu III-dtpa-bis(melamine)-melamine complex was extremly stable with the stability constant (k) of 9.90 × 10 6 and the complexation ratio was 1:1. The detection limit (LOD) was 0.3743 µmol/L. The recoveries ranged from 99.80 to 100.50 %, when melamine was detected in some milk products. It can be confirmed that Eu III-dtpa-bis(melamine) shows high selectivity, sensitivity, targeting and recognition ability in melamine detection.

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