Effects of Poly(allylamine) on the Sugar-Binding Properties of a Phenylboronic Acid-Appended Azo Dye

Egawa, Yuya; Niina, Satoshi; Anzai, Jun Ichi

doi:10.2116/bunsekikagaku.55.1003

Cited by 5 publications

(6 citation statements)

References 6 publications

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“…For a supramolecular approach, we used anionic dye 5 and poly(allylamine) (PAA), which interact through electrostatic force [ 91 ]. In pH 7.0 solution, the absorption spectrum of dye 5 was changed upon the addition of PAA, which indicates the formation of aggregates of 5 on the PAA.…”

Section: Supramolecular Approaches For Glucose Sensingmentioning

confidence: 99%

Colorimetric Sugar Sensing Using Boronic Acid-Substituted Azobenzenes

2014

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In association with increasing diabetes prevalence, it is desirable to develop new glucose sensing systems with low cost, ease of use, high stability and good portability. Boronic acid is one of the potential candidates for a future alternative to enzyme-based glucose sensors. Boronic acid derivatives have been widely used for the sugar recognition motif, because boronic acids bind adjacent diols to form cyclic boronate esters. In order to develop colorimetric sugar sensors, boronic acid-conjugated azobenzenes have been synthesized. There are several types of boronic acid azobenzenes, and their characteristics tend to rely on the substitute position of the boronic acid moiety. For example, o-substitution of boronic acid to the azo group gives the advantage of a significant color change upon sugar addition. Nitrogen-15 Nuclear Magnetic Resonance (NMR) studies clearly show a signaling mechanism based on the formation and cleavage of the B–N dative bond between boronic acid and azo moieties in the dye. Some boronic acid-substituted azobenzenes were attached to a polymer or utilized for supramolecular chemistry to produce glucose-selective binding, in which two boronic acid moieties cooperatively bind one glucose molecule. In addition, boronic acid-substituted azobenzenes have been applied not only for glucose monitoring, but also for the sensing of glycated hemoglobin and dopamine.

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Section: Supramolecular Approaches For Glucose Sensingmentioning

confidence: 99%

Colorimetric Sugar Sensing Using Boronic Acid-Substituted Azobenzenes

2014

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“…The reasons should originate from the poor electrical conductivity of GO blocking the electrode surface and the abundant negative charges of PBA and GO repelling the Fe(CN) 6 3À/4À in the alkaline media. 54 These experimental results demonstrate that the impedimetric DNA sensor (GO-PBA/DNA/Au electrode) based on signal-amplification of GO-PBA has been fabricated successfully.…”

Section: Preparation Of the Dna-based Sensor And The Feasibility Of I...mentioning

confidence: 59%

“…Scheme 2 depicts the preparation and sensing feasibility of the developed impedimetric DNA sensor (GO-PBA/DNA/Au) based on signal-amplification of GO-PBA for BLM detection. The sensor contains a reported 16-mer N-ssDNA oligonucleotide 1 with a carboxyl group at the 5 0 end as a linkage with DA (PBA is a synthetic organic molecule capable of reversibly binding with 1,2-diols, [54][55][56] and the DA contains 1,2-diols which were used for binding with PBA) and a thiol group at the 3 0 end as an anchor on a gold electrode surface. In this work, we chose GO-PBA as an amplification factor since GO has poor electrical conductivity and PBA contains a large number of negative charges in alkaline medium.…”

Section: Preparation Of the Dna-based Sensor And The Feasibility Of I...mentioning

confidence: 99%

Amplified impedimetric DNA sensor based on graphene oxide–phenylboronic acid for sensitive detection of bleomycins

et al. 2014

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“…The probable reason is the electrical repellence between 3-APBA and [Fe(CN) 6 ] 3À/4À in alkaline media. 35 However, aer the 3-APBA-PTCA-CNTs modied GC electrode is further incubated with 15 mM CC for 0.5 h, it was noted that there was an obvious decrease in R et (from 1154 to 620 U, curve c in Fig. 3(A)).…”

Section: Characterization Of Ptca-cntsmentioning

confidence: 97%