A selective fluorescent ‘turn-on’ sensor for recognition of Zn2+ in aqueous media

Özdemir, Mecit

doi:10.1016/j.saa.2016.02.040

Cited by 19 publications

(9 citation statements)

References 47 publications

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“…Therefore, research interest in the recognition of Zn 2+ and PPi has increased. Considerable efforts have been made to recognize Zn 2+ ions, such as spectrometry, electrochemistry, and chromatography . For the selective and sensitive detection PPi, fluorescence assays, colorimetric assays, and electro‐optical methods have also been developed.…”

Section: Introductionmentioning

confidence: 99%

Sequential Recognition of Zinc and Pyrophosphate Ions in a Terpyridine‐Functionalized Single Nanochannel

et al. 2016

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A highly selective recognition system for zinc(II) and pyrophosphate ions is constructed using a single conical nanochannel covalently functionalized with N'-{4-[(2,2':6',2''-terpyridine)-4-yl]benzyl}ethane-1,2-diamine (TPYD). The immobilized TPYD acts as a specific coordination site for Zn to form TPYD-Zn complexes in preference over other metal ions, and subsequently, the resulting Zn -coordinated nanochannel can be used as a selective recognition element for the pyrophosphate ion based on the coordination reaction between hydroxyl oxygen atoms of pyrophosphate and Zn . Ion recognition is monitored by measuring the current-voltage curves of the solutions. The ionic current of the TPYD-functionalized system at -2.0 V undergoes a clear decrease after exposure to Zn ions and is followed with an obvious increase after subsequent treatment with a pyrophosphate solution. The change of ionic current can be primarily attributed to the variation of charge density of the nanochannel. This functionalized single nanochannel might provide a simple and universal means to recognize other targets by modifying different functional molecules onto the inner surfaces of nanochannels.

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Section: Introductionmentioning

confidence: 99%

Sequential Recognition of Zinc and Pyrophosphate Ions in a Terpyridine‐Functionalized Single Nanochannel

et al. 2016

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“…This is actually a classic behavior of fluorescent molecules derived from rhodamine-based scaffolds. [39,43,46] Furthermore, when incubating each competitive metal ion-including Na + , K + , Ca 2 + , Mg 2 + , Ag + , Cr 3 + , Fe 3 emission were observed, as indicated in Figure 3. In short, the fluorescence behavior of these two sensors toward the selected metal ions was almost identical.…”

Section: The Fluorescence Performance Of the Rp1 And Rp2 Probesmentioning

confidence: 84%

“…Following interaction of the probes with target speciessuch as cations, anions and neutral molecules -or by exposure to external factors such as heat and pressure, broadband amplification could be observed in both the UV-Vis absorption and fluorescence emission spectra. [6,[37][38][39][40][41][42][43][44][45][46][47][48][49] The instrumental analyses are verified in detail, which are included in the supplementary electronic information.…”

Section: Synthesis Of Chemosensorsmentioning

confidence: 99%

Two Colorimetric and Fluorescent Dual‐Channel Chemosensors for the Selective Detection of pH in Aqueous Solutions

Özdemir

2020

ChemistrySelect

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Fluorescent probe – which can detect metal ions, pH, and other analytical species through spectroscopic approaches – have recently attracted significant research attention in the fields of analytical and biological chemistry. For this study, two novel colorimetric and fluorescent probes, named RP1 and RP2, were designed and synthesized. Their structural confirmations were then achieved through elemental analysis, FT‐IR, NMR (1H and 13C) spectroscopies, and tandem MS spectrometry. To gain full understanding of the photophysical properties and chemosensory performances of these two dyes, both the UV‐Vis absorption and fluorescence titration experiments were carefully performed in aqueous media. Notably, upon treatment of RP1 and RP2 in solutions with each competitive metal ion, neither increases in absorption and fluorescence spectra above 400 nm nor any changes in color were observed. However, at lower pH (i. e.,<7.0), those two sensors exhibited a drastic change in color from colorless to pink, followed by broadened absorption bands. As expected, upon excitation at 510 nm, a strong enhancement of the fluorescence emissions was obtained. By conducting 1H NMR and optical titrations, the spirolactam‐ring opening reaction of these receptors, induced by H+ ions at lower pH, was approved. The results demonstrate that the fluorescent dyes RP1 and RP2 can be effectively used as reversible pH‐responsive chromogenic and fluorogenic “Off‐On” switches in real samples.

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“…Kemosensör C1 ile Fe 2+ metal iyonu arasındaki bağlanma modunu araştırmak için Job's plot deneyi yapılmıştır (Ozdemir, 2016 Şekil 8: Job's plot metoduyla kemosensör C1 ile Fe 2+ iyonları arasındaki muhtemel bağlanma oranları.…”

Section: Job's Plot Uygulaması Bağlanma Sabiti Ve Tayin Alt Sınırınıunclassified

“…Diğer taraftan, floresan titrasyon spektrumlarındaki emisyon yoğunlukları (1/F-F0, λem= 529 nm) demir iyonu konsantrasyonlarına (1/[Fe 2+ ] karşı Benesi-Hildebrand eşitliği (1) kullanılarak Şekil 9 (1)'deki grafik elde edilmiştir (Ozdemir, 2016). Buradaki verilerden bağlanma sabiti (Ka) aşağıdaki eşitlik kullanılarak hesaplanmış olup 1.95x10 4 M -1 olarak bulunmuştur.…”

Section: Job's Plot Uygulaması Bağlanma Sabiti Ve Tayin Alt Sınırınıunclassified

A New, Colorimetric and Fluorescent Chemosensor for The Selective Detection of Fe2+ in Aqueous Media

Özdemir¹

2018

AKU-J. Sci. Eng.

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Son zamanlarda, kolorimetrik ve floresan sensörler, sulu ortamdaki ağır ve geçiş metal iyonlarının duyarlı ve seçici olarak tayin çalışmalarında düşük maliyet, kolay kullanım, yüksek performans, karmaşık olmayışı, test kiti olarak hazırlanma gibi avantajlar sağladıkları için önemli derecede ilgi çekmiştir. Bu çalışmada, kumarin temelli yeni bir kemosensör sentezlenmiş ve elementel analiz, FT-IR, Tandem kütle, 1 H NMR ve 13 C NMR spektroskopileri kullanılarak karakterize edilmiştir. Daha sonra, sensör C1'in seçicilik ve duyarlılık özelliği, biyolojik ve çevresel açıdan öneme sahip bazı metal iyonlarına karşı DMSO-H2O (v/v, 2:1) ortamında araştırılmıştır. UV-vis absorpsiyon ve floresan deneylerinden elde edilen sonuçlar, kemosensör C1'in sadece demir (II) iyonlarına yönelik seçicilik ve duyarlılık gösterdiğini ortaya çıkarmıştır.

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A selective fluorescent ‘turn-on’ sensor for recognition of Zn2+ in aqueous media

Cited by 19 publications

References 47 publications

Sequential Recognition of Zinc and Pyrophosphate Ions in a Terpyridine‐Functionalized Single Nanochannel

Sequential Recognition of Zinc and Pyrophosphate Ions in a Terpyridine‐Functionalized Single Nanochannel

Two Colorimetric and Fluorescent Dual‐Channel Chemosensors for the Selective Detection of pH in Aqueous Solutions

A New, Colorimetric and Fluorescent Chemosensor for The Selective Detection of Fe2+ in Aqueous Media

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