Talanta, Journal Year: 2024, Volume and Issue: 279, P. 126639 - 126639
Published: July 31, 2024
Language: Английский
Journal of the American Chemical Society, Journal Year: 2024, Volume and Issue: 146(17), P. 12197 - 12205
Published: April 17, 2024
The development of potential-resolved electrochemiluminescence (ECL) systems with dual emitting signals holds great promise for accurate and reliable determination in complex samples. However, the practical application such is hindered by inevitable mutual interaction mismatch between different luminophores or coreactants. In this work, first time, precisely tuning oxygen reduction performance M–N–C single-atom catalysts (SACs), we present a luminol ECL system employing endogenous dissolved O2 as coreactant. Using advanced situ monitoring theoretical calculations, elucidate intricate mechanism involving selective efficient activation through central metal species modulation. This modulation leads to controlled generation hydroxyl radical (·OH) superoxide (O2·–), which subsequently trigger cathodic anodic emission, respectively. well-designed Cu–N–C SACs, their moderate oxophilicity, enable simultaneous ·OH O2·–, thereby facilitating ECL. As proof concept, employed principal component analysis statistical method differentiate antibiotics based on output dual-potential signals. work establishes new avenue constructing platform single luminophore coreactant precise regulation active intermediates.
Language: Английский
Citations
40
Analytical Chemistry, Journal Year: 2024, Volume and Issue: unknown
Published: Aug. 14, 2024
In this work, the relationship between electrochemiluminescence (ECL) signal and driving voltage was first studied by self-made reduced oxidized closed bipolar electrodes (CBPEs). It found that when large enough, maximum ECL signals for two kinds of CBPEs were same but their required drive voltages different. Zinc cobalt nitrogen doped carbon material (ZnCoN-C) had an outstanding electric double layer (EDL) property conductivity. Therefore, it could significantly reduce CBPE systems, reaching Ru(bpy)32+. Interestingly, ZnCoN-C modified electrode reached signal, bare zero. As a proof-of-concept application, zero-background dual-mode CBPE-ECL biosensor constructed ultrasensitive detection ochratoxin A (OTA) in beer. Considering beer samples contained number reducing substances, system selected to build biosensor. Furthermore, convenient imaging platform using smartphone built OTA. This work used unique EDL regulate time; thus, novel sensor constructed. Further, provided deeper understanding opened new door detection.
Language: Английский
Citations
9
Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: unknown
Published: Aug. 16, 2024
The catalytic activity of platinum for CO oxidation depends on the interaction electron donation and back-donation at center. Here we demonstrate that bromine nanoparticles with electron-rich properties bonded sp-C in graphdiyne (PtBr NPs/Br-GDY), which is formed by ligand constitutes an electrocatalyst a high CO-resistant methanol reaction (MOR). catalyst showed peak mass MOR as 10.4 A mg
Language: Английский
Citations
7
Journal of the American Chemical Society, Journal Year: 2024, Volume and Issue: 146(32), P. 22724 - 22735
Published: Aug. 2, 2024
Electrochemiluminescence (ECL) is typically confined to a micrometric region from the electrode surface. This study demonstrates that ECL emission can extend up several millimeters away employing electrogenerated chlorine bubbles. The mechanism behind this bubble-enhanced was investigated using an Au microelectrode in chloride-containing and chloride-free electrolyte solutions. We discovered at gas/solution interface driven by two parallel effects. First, bubble corona effect facilitates generation of hydroxyl radicals capable oxidizing luminol while attached Second, hypochlorite generated sustains for over 200 s extends range 5 mm into solution, following detachment. new approach increase intensity luminol-based assays 5-fold compared conventional method. demonstrated through glucose bioassay, midrange mobile phone camera detection. These findings significantly expand potential applications extending its effective time space.
Language: Английский
Citations
6
TrAC Trends in Analytical Chemistry, Journal Year: 2024, Volume and Issue: 178, P. 117812 - 117812
Published: June 14, 2024
Language: Английский
Citations
5
Trends in Food Science & Technology, Journal Year: 2024, Volume and Issue: 153, P. 104706 - 104706
Published: Sept. 10, 2024
Language: Английский
Citations
5
Analytical Chemistry, Journal Year: 2024, Volume and Issue: 96(24), P. 10102 - 10110
Published: June 4, 2024
Owing to the limitations of dual-signal luminescent materials and coreactants, constructing a ratiometric electrochemiluminescence (ECL) biosensor based on single luminophore is huge challenge. This work developed an excellent zirconium metal–organic framework (MOF) Zr-TBAPY as ECL luminophore, which simultaneously exhibited cathodic anodic without any additional coreactants. First, was successfully prepared by solvothermal method with 1,3,6,8-tetra(4-carboxyphenyl)pyrene (TBAPY) organic ligand Zr4+ cluster metal node. The exploration mechanisms confirmed that originated from pathway reactive oxygen species (ROS) coreactant, generated dissolved (O2), while stemmed radical itself coreactant. Besides, N,N-diethylethylenediamine (DEDA) regulator signals, quenched enhanced ECL, specific its dual action were also investigated. DEDA can act coreactant consuming ROS. Therefore, coreactant-free skillfully constructed combining regulatory role signal amplification reaction catalytic hairpin assembly (CHA). realized ultrasensitive ratio detection HIV DNA. linear range 1 fM 100 pM, limit (LOD) low 550 aM. outstanding characteristic provided new thoughts for development way fabricating single-luminophore platform.
Language: Английский
Citations
4
Angewandte Chemie, Journal Year: 2024, Volume and Issue: 136(40)
Published: July 8, 2024
Abstract The catalytic activity of platinum for CO oxidation depends on the interaction electron donation and back‐donation at center. Here we demonstrate that bromine nanoparticles with electron‐rich properties bonded sp‐C in graphdiyne (PtBr NPs/Br‐GDY), which is formed by ligand constitutes an electrocatalyst a high CO‐resistant methanol reaction (MOR). catalyst showed peak mass MOR as 10.4 A mg Pt −1 , 20.8 times higher than 20 % Pt/C. also robust long‐term stability slight current density decay after 100 hours 35 mA cm −2 . Structural characterization, experimental, theoretical studies show from makes surface catalysts highly electron‐rich, can strengthen adsorption well enhance π to weaken C−O bond facilitate electrooxidation performance during MOR. results highlight importance structure among active sites Pt‐halogen provide detailed insights into new mechanism overcome poisoning center orbital level.
Language: Английский
Citations
4
The Journal of Physical Chemistry C, Journal Year: 2024, Volume and Issue: 128(31), P. 13155 - 13161
Published: July 30, 2024
Electrochemiluminescence (ECL) of the luminol-dissolved O2 system has been applied in many fields, but role reactive oxygen species (ROS) potential-resolved ECL remains ambiguous due to complexity ROS production and difficulty detecting ROS. In this work, function potential-dependent luminol-O2 was investigated detail. Interestingly, four peaks were observed profiles, including a cathodic peak at −0.5 V (ECL-1), two anodic 0.45 (ECL-2) 1.3 (ECL-3), broad flat starting from 1.11 ending 0.35 (ECL-4, secondary peak) on reverse scan backward upper potentials. The impact different channels investigated. It found that superoxide radical (O2•–) could promote all above peaks, while hydroxyl (HO•) only facilitate ECL-1, ECL-3, ECL-4. Additionally, pathways proposed. investigation will guide rational regulation potential applications luminol various fields.
Language: Английский
Citations
4
Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: unknown, P. 157514 - 157514
Published: Nov. 1, 2024
Language: Английский
Citations
4