A terbium based fluorescent probe was synthesized by coordinating terbium ions with a designed oligonucleotides (5'-ATATGGGGGATAT-3', termed GH5). GH5 improved the fluorescence of terbium ions by four orders of magnitude. The fluorescence enhancement of terbium ions by different oligonucleotides sequences indicated that the polyguanine loop of the hairpin GH5 is key to enhance terbium ion emission. The quantum yield of Tb-GH5 probe was 10.5% and the probe was photo-stable. The result of conductivity titration indicated that the stoichiometry of the probe is 3.5 Tb: 1 GH5, which is confirmed by fluorescence titration. This probe had high sensitivity and specificity for the detection of lead ions. The fluorescence intensity of this probe was linear with respect to lead concentration over a range 0.3-2.1 nM (R(2) = 0.99). The limit of detection for lead ions was 0.1 nM at a signal-to-noise ratio of 3.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1039/c3an36795a | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
A luminescent lanthanide functionalized hydrogen-bonded organic framework hydrogel: Fluorescence sensing platform for copper and iron ions detection.
Talanta
December 2024
State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science & Engineering, Shanghai Institute of Pollution Control and Ecological Security, Tongji University, 1239 Siping Road, Shanghai, 200092, China. Electronic address:
The excessive presence of the metal ions Cu and Fe in the environment poses a serious threat to ecosystems and human health, so timely and accurate detection of them has become essential and urgent. In this paper, a novel hydrogel-based fluorescent sensor, named ME-IPA@SA-TbZn, was fabricated facilely through an in-situ cross-linking modification method and was used for the detection of Cu and Fe in water bodies. The ME-IPA@SA-TbZn is essentially a hybrid hydrogel bead that exhibits vibrant fluorescence, employing Tb and Zn functionalized hydrogen-bonded organic frameworks (HOFs) as the fluorescence functional core and sodium alginate (SA) as the hydrogel matrix.
View Article and Find Full Text PDFLanthanide binding peptide surfactants at air-aqueous interfaces for interfacial separation of rare earth elements.
Proc Natl Acad Sci U S A
December 2024
Department of Chemical Engineering, The City College of New York, New York, NY 10031.
Rare earth elements (REEs) are critical materials to modern technologies. They are obtained by selective separation from mining feedstocks consisting of mixtures of their trivalent cation. We are developing an all-aqueous, bioinspired, interfacial separation using peptides as amphiphilic molecular extractants.
View Article and Find Full Text PDFTuning emissive color of trivalent terbium ion through environmental factors: optoelectronic insights from theoretical, spectral and computational studies.
RSC Adv
December 2024
Department of Chemistry, COBS&H, CCS Haryana Agricultural University Hisar-125004 Haryana India.
The combination of 4,4,4-trifluoro-1-phenyl-1,3-butanedione (TFPB) and pyrazine (pyz) with Tb ions forms two distinct types of complexes, represented by the formulas [Tb(TFPB)(L)], where L is either HO or pyz, and [(Tb(TFPB))pyz]. A detailed examination of the impact of the surrounding environment on the photophysical properties of these synthesized complexes was conducted. Photoluminescence (PL) analysis indicated that the magnetic dipole transition (D → F) is dominant in Tb(iii)-based systems.
View Article and Find Full Text PDFPreclinical comparison of (radio)lanthanides using mass spectrometry and nuclear imaging techniques: biodistribution of lanthanide-based tumor-targeting agents and lanthanides in ionic form.
Eur J Nucl Med Mol Imaging
December 2024
Department of Chemistry and Applied Biosciences, ETH Zurich, Zurich, 8093, Switzerland.
Purpose: With the growing interest in exploring radiolanthanides for nuclear medicine applications, the question arises as to whether they are generally interchangeable without affecting a biomolecule's pharmacokinetic properties. The goal of this study was to investigate similarities and differences of four (radio)lanthanides simultaneously applied as complexes of biomolecules or in ionic form.
Methods: Inductively coupled plasma mass spectrometry (ICP-MS) was employed for the simultaneous detection of four lanthanides (Ln = lutetium, terbium, gadolinium and europium) in biological samples.
Blueberry Anthocyanin Functionalized CaMoO:Tb Nanophosphors for Dual-Mode pH Sensing.
Luminescence
December 2024
Anhui key Laboratory of Spin Electron and Nanomaterials of Anhui Higher Education Institutes, School of Chemistry and Chemical Engineering, Suzhou University, Suzhou, Anhui, China.
A series of green phosphors, CaMoO:y%Tb (where y = 0.1, 0.5, 1, 2, 3, 4, and 5) were successfully prepared via hydrothermal synthesis.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!