A5063761923- Photoreceptor and optogenetics research
- Advanced Fluorescence Microscopy Techniques
- Spectroscopy and Quantum Chemical Studies
- Photochemistry and Electron Transfer Studies
- Photosynthetic Processes and Mechanisms
- Advanced battery technologies research
- Advanced Battery Materials and Technologies
- Spectroscopy Techniques in Biomedical and Chemical Research
- Luminescence and Fluorescent Materials
- Photochromic and Fluorescence Chemistry
- bioluminescence and chemiluminescence research
- Advancements in Battery Materials
- Laser-Matter Interactions and Applications
- Perovskite Materials and Applications
- Click Chemistry and Applications
- Spectroscopy and Laser Applications
- Molecular Sensors and Ion Detection
- Advanced Biosensing Techniques and Applications
- Advanced Fiber Laser Technologies
- Spectroscopy and Chemometric Analyses
- Advanced biosensing and bioanalysis techniques
- Mass Spectrometry Techniques and Applications
- Molecular spectroscopy and chirality
- Advanced Battery Technologies Research
- Advanced Chemical Physics Studies
Oregon State University
2016-2025
Guangzhou Institute of Energy Conversion
2023
Corvallis Environmental Center
2015-2021
Linus (Norway)
2015-2018
University of California, Berkeley
2009-2010
Hanalei Watershed Hui
2009
University of Pennsylvania
2003-2007
State Key Laboratory of Information Engineering in Surveying Mapping and Remote Sensing
2006
Wuhan University
2006
Mount Holyoke College
2004
We report a low-cost water-in-salt electrolyte, of 30 m ZnCl2, which enables dendrite-free Zn metal anode to possess high coulombic efficiency (CE). In asymmetric Zn‖Zn cells with limited mass plated as the working electrode, ZnCl2 WiSE improves average CE 95.4% from 73.2% in 5 ZnCl2.
Abstract A great challenge for all aqueous batteries, including Zn‐metal is the parasitic hydrogen evolution reaction on low‐potential anode. Herein, we report formula of a highly concentrated electrolyte that mitigates by transforming water molecules more inert. The comprises primarily ZnCl 2 and LiCl as an additive, both which are inexpensive salts. O–H covalent bonds in get strengthened chemical environment has fewer bonding interactions greater number Zn–Cl superhalides, suggested...
Primary events that power ultrafast excited state proton transfer in water are revealed to involve coupled intermolecular and intramolecular motions.
Amine groups are common constituents of organic dyes and play important roles in tuning fluorescence properties. In particular, intensive research works have demonstrated the tendency capabilities amines influencing chromophore brightness. Such properties been explained by multiple mechanisms spanning from twisted intramolecular charge transfer (TICT) to energy gap law beyond, which introduce additional nonradiative dissipation pathways. this review, we aim provide a focused overview...
Abstract Here, four MOFs, namely Sc-TBAPy, Al-TBAPy, Y-TBAPy, and Fe-TBAPy (TBAPy: 1,3,6,8-tetrakis( p -benzoic acid)pyrene), were characterized evaluated for their ability to remediate glyphosate (GP) from water. Among these materials, Sc-TBAPy demonstrates superior performance in both the adsorption degradation of GP. Upon light irradiation 5 min, completely degrades 100% GP a 1.5 mM aqueous solution. Femtosecond transient absorption spectroscopy reveals that exhibits enhanced charge...
Abstract The electrochemical stability window of water is known to vary with the type and concentration dissolved salts. However, underlying influence ions on thermodynamic aqueous solutions has not been fully understood. Here, we investigated electrolytic behaviors electrolytes as a function different ions. Our findings indicate that high ionic potentials, i.e., charge density, promote formation their respective hydration structures, enhancing reactions via an inductive effect, particularly...
The two-dimensional infrared spectra of a series doubly isotopically substituted 25-residue α-helices were measured with femtosecond three pulse time domain interferometry. insertion 13C16O and 13C18O labels at known residues on the helix permitted vibrational couplings between different amide I' modes separated by one, two, to be measured. 2D IR signal one residue in 25 was readily studied, confirming this approach is applicable labeled proteins. We identified each pair isotopomer levels...
The two nitrile groups at the wings of nonnucleoside HIV-1 reverse transcriptase (RT) inhibitor TMC278 are both identified in high-sensitivity 2D IR spectroscopy experiments RT/TMC278 complex. vibrational spectra indicate that arms sense quite different environments within hydrophobic pocket. relaxation almost equal 3 ps from model studies. expose a significant distribution frequencies diffuse equilibrium on ultrafast time scales ranging hundreds femtoseconds to tens picoseconds. slow...
Proton transfer reaction plays an essential role in a myriad of chemical and biological processes, to reveal the choreography proton motion intra- intermolecularly, spectroscopic technique capable capturing molecular structural snapshots on intrinsic time scale motions is needed. The photoacid pyranine (8-hydroxypyrene-1,3,6-trisulfonic acid, HPTS) serves as paradigm case dissect excited state (ESPT) events aqueous solution, triggered precisely by photoexcitation. We have used femtosecond...
We demonstrate a versatile and efficient setup to perform femtosecond stimulated Raman spectroscopy (FSRS). Technical innovations are implemented achieve the wavelength tunability for both picosecond narrowband pump pulse broadband probe pulse. Using simplified one-grating scheme in home-built second harmonic bandwidth compressor followed by two-stage noncollinear optical parametric amplifier, we tune from ca. 480 750 nm. To generate suitable tandem, rely on our recently demonstrated...
Chemistry studies the composition, structure, properties, and transformation of matter. A mechanistic understanding pertinent processes is required to translate fundamental knowledge into practical applications. The current development ultrafast Raman as a powerful time-resolved vibrational technique, particularly femtosecond stimulated spectroscopy (FSRS), has shed light on structure-energy-function relationships various photosensitive systems. This Perspective reviews recent work...
A non-aqueous proton electrolyte is devised by dissolving H3 PO4 into acetonitrile. The exhibits unique vibrational signatures from stimulated Raman spectroscopy. Such an characteristics compared to aqueous acidic electrolytes: 1) higher (de)protonation potential for a lower desolvation energy of protons, 2) better cycling stability dissolution suppression, and 3) Coulombic efficiency owing the lack oxygen evolution reaction. Two full cells exhibit stability, efficiency, less self-discharge...
Oxidative anion insertion into graphite in an aqueous environment represents a significant challenge the construction of dual-ion batteries. In dilute electrolytes, oxygen evolution reaction (OER) dominates anodic current before anions can be inserted gallery. Herein, we report that reversible Mg-Cl superhalides delivers record-high capacity 150 mAh g-1 from deep eutectic solvent comprising magnesium chloride and choline chloride. The does not form staged intercalation compounds; instead,...
Aqueous electrolytes typically suffer from poor electrochemical stability; however, eutectic aqueous solutions-25 wt.% LiCl and 62 H3 PO4 -cooled to -78 °C exhibit a significantly widened stability window. Integrated experimental simulation results reveal that, upon cooling, Li+ ions become less hydrated pair up with Cl- , ice-like water clusters form, H⋅⋅⋅Cl- bonding strengthens. Surprisingly, this low-temperature solvation structure does not strengthen molecules' O-H bond, bucking the...
Abstract Rechargeable aqueous zinc batteries are promising for large‐scale energy storage due to their low cost and high safety; however, density has reached the ceiling based on conventional cathodes with a single cationic redox reaction mechanism. Herein, highly reversible cathode of typical layered vanadium oxide is reported, which operates both couple V 5+ /V 3+ accompanied by Zn 2+ anionic O – /O 2– anion hosting in an deep eutectic solvent electrolyte. The oxygen delivers additional...
The tertiary interactions between amide-I vibrators on the separate helices of transmembrane helix dimers were probed by ultrafast 2D vibrational photon echo spectroscopy. IR approach proves to be a useful structural method for study membrane-bound structures. 27-residue human erythrocyte protein Glycophorin A peptide sequence: KKITLIIF G 79 VMAGVIGTILLISW 94 IKK was labeled at and with 13 C 16 O or 18 O. isotopomers their 50:50 mixtures formed helical in SDS micelles whose spectra showed...
The parameters needed to describe the two-dimensional infrared (2D IR) spectra of isotopically labeled α-helix are presented. 2D IR in amide-I' spectral region a series singly 13C18O-labeled 25-residue α-helices were measured by three-pulse heterodyned interferometry. dependence on population time was measured. Individual isotopomer levels (residues 11−14) clearly identified IR, downshifted ∼61 cm-1 from main helical band. By analyzing line shapes 13C18O diagonal peaks that appeared at...
Mapping out multidimensional potential energy surfaces has been a goal of physical chemistry for decades in the quest to both predict and control chemical reactivity. Recently new spectroscopic approach called Femtosecond Stimulated Raman Spectroscopy or FSRS was introduced that can structurally interrogate multiple dimensions reactive surface. is an ultrafast laser technique which provides complete time-resolved, background-free spectra few shots. The simultaneous time (~50 fs) spectral (~8...
Significance Fluorescent proteins (FPs) started their incredible, colorful journey in bioimaging and biomedicine with the extraction purification of GFP from Pacific jellyfish Aequorea victoria more than 50 years ago. Recently, an expanded palette genetically encodable Ca 2+ -sensing FPs have paved way to image neural activities important biological processes where is ubiquitous messenger. To unravel molecular choreography engineered for visualizing movement, we study embedded chromophore...
Significance The aqueous chemistry of Al has a large impact across the biosphere, hydrosphere, geosphere, and anthrosphere. Despite century study, speciation are still not well understood because challenges selectively isolating synthesizing specific Al-containing clusters precisely characterizing those clusters. We report atom- step-economical electrolytic synthesis combined with improved femtosecond Raman spectroscopy computations to elucidate structures formation pathways in situ....