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| Open AccessFrustrated charge transfer in vibrationally inelastic Ar++N2 collisions via hard collision glory scattering
Inelastic collisions between small particles typically lead to low/high vibrational excitation when forward/backward scattered. Here, the authors show a reversal for this behavior in the nonreactive scattering of Ar+ ions with neutral N2 molecules.
- Guodong Zhang
- , Dandan Lu
- & Hong Gao
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Article
| Open AccessExploring dynamic solvation kinetics at electrocatalyst surfaces
Interfacial ion solvation is omnipresent in electrochemistry. Sarabia et al. now explore solvation kinetics with a millisecond time resolution and shine light on the critical role of the solvent during dynamic catalyst and electrosorption kinetics.
- Francisco Sarabia
- , Carlos Gomez Rodellar
- & Sebastian Z. Oener
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| Open AccessExtending the defect tolerance of halide perovskite nanocrystals to hot carrier cooling dynamics
The efficiency of lead-halide perovskite photovoltaics is related to the tolerance of their band-edge charge-carriers to point defects. Here, the authors show that this tolerance can be extended to hot carriers depending on the defect energy level.
- Junzhi Ye
- , Navendu Mondal
- & Robert L. Z. Hoye
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Article
| Open AccessData-driven discovery of potent small molecule ice recrystallisation inhibitors
Controlling ice formation is crucial for cryopreservation. Here, authors developed machine learning models to predict ice recrystallisation inhibition by small molecules, showcasing a data-driven approach for cryoprotectant discovery.
- Matthew T. Warren
- , Caroline I. Biggs
- & Gabriele C. Sosso
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Article
| Open AccessHybrid lipid-AuNP clusters as highly efficient SERS substrates for biomedical applications
Surface Enhanced Raman Scattering (SERS) detection is often limited by difficulties in preparing adequate tags – normally metallic nanoparticles (NPs) functionalised with Raman-active molecules. Here, the authors introduce LipoGold Tags, a platform where clusters of gold NPs self-assemble on lipid vesicles. These tags are used for SERS detection.
- Jacopo Cardellini
- , Caterina Dallari
- & Debora Berti
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Article
| Open AccessImplementing reactivity in molecular dynamics simulations with harmonic force fields
Molecular dynamics is a common tool to study microscopic physicochemical systems, however, it is limited by the inhability to form and break chemical bonds. Here the authors present a method to modify traditional force-fields implementing bond dissociation and bond forming.
- Jordan J. Winetrout
- , Krishan Kanhaiya
- & Hendrik Heinz
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| Open AccessBrightening triplet excitons enable high-performance white-light emission in organic small molecules via integrating n–π*/π–π* transitions
The authors demonstrate that high-pressure treatment of IPA endows the material with enhanced hydrogen bonding, which brightens the white-light emission by regulating the ratio of singlet and triplet exciton populations.
- Qing Yang
- , Xinyi Yang
- & Bo Zou
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Article
| Open AccessModulation of triplet quantum coherence by guest-induced structural changes in a flexible metal-organic framework
Molecular qubits have great potential as quantum sensors due to their ability to be in close proximity to target analytes, but design guidelines on how to make them respond to specific analytes remain unclear. Here authors show that hybrids of triplet qubits and flexible MOFs can change the coherence time of electron spins of photo-excited triplet state upon adsorption of guest.
- Akio Yamauchi
- , Saiya Fujiwara
- & Nobuhiro Yanai
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Article
| Open AccessNear-complete chiral selection in rotational quantum states
A potential origin of homochirality in living organisms is the parity-violating energy difference between enantiomers. Here, the authors realize a technique to control rotational states of chiral molecules using microwave and ultraviolet radiation.
- JuHyeon Lee
- , Elahe Abdiha
- & Sandra Eibenberger-Arias
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| Open AccessEnantiospecificity in NMR enabled by chirality-induced spin selectivity
The authors present a theoretical treatment demonstrating that NMR experiments on chiral molecules can reveal enantioselective nuclear J-couplings due to bond polarization and spin-orbit interaction. This also aids in understanding chirality-induced phenomena more generally and their applications.
- T. Georgiou
- , J. L. Palma
- & L.-S. Bouchard
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Article
| Open AccessImproving the creation of SiV centers in diamond via sub-μs pulsed annealing treatment
Silicon-vacancy (SiV) centers in diamond are emerging as promising quantum emitters for various applications. Here, authors devised a novel pulsed annealing scheme that improves the conversion efficiency of SiV centers in diamond.
- Yan-Kai Tzeng
- , Feng Ke
- & Steven Chu
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Article
| Open AccessMultiple-stimuli fluorescent responsive metallo-organic helicated cage arising from monomer and excimer emission
Effectively regulating monomer and excimer emission in a singular supramolecular luminous platform is challenging due to high difficulty of precise control over its aggregation and dispersion behavior when subjected to external stimuli. Here, the authors report a metallo-cage featuring a triple helical motif that displays a unique dual emission.
- Zhe Zhang
- , Qixia Bai
- & Tun Wu
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Article
| Open AccessSelective excitation of vibrations in a single molecule
The authors demonstrate selective excitation of atomic vibrations in a single molecule utilizing tip-enhanced resonance Raman spectroscopy, by precisely tuning the wavelength of the exciting laser to be resonant with the molecular vibronic transitions.
- Yang Luo
- , Shaoxiang Sheng
- & Manish Garg
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Article
| Open AccessThe solvation shell probed by resonant intermolecular Coulombic decay
X-ray triggered non-local processes, such as Intermolecular Coulombic Decay, are shown here to selectively probe solvation-shell molecules in solution and provide new information on their electronic structure and on ion-pair formation.
- Rémi Dupuy
- , Tillmann Buttersack
- & Hendrik Bluhm
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Article
| Open AccessOn the origin of low-valent uranium oxidation state
The authors investigate fundamental interactions in low-valent uranium compounds using resonant inelastic X-ray scattering, providing insights into their complex electronic structures and contributing to our understanding of actinide chemistry.
- C. L. Silva
- , L. Amidani
- & K. O. Kvashnina
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| Open AccessFluorescence changes in carbon nanotube sensors correlate with THz absorption of hydration
SWCNTs are pivotal optical molecular sensors, but until now, the underlying mechanism how the binding of analytes affects the fluorescence remained elusive. This study has elucidated that coupling between exciton-coupled plasmon modes of SWCNTs and THz water modes is a significant factor.
- Sanjana S. Nalige
- , Phillip Galonska
- & Martina Havenith
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Article
| Open AccessDirect tracking of H2 roaming reaction in real time
The H2 roaming mechanism in organic molecules is involved in the formation of \({{{{{{{{\rm{H}}}}}}}}_{3}}^{+}\), one of the most abundant molecular ions in the universe, but its direct visualization has been challenging. Here the authors obtain direct insights into these complex dynamics by tracking the roaming H2 molecules in acetonitrile with time-resolved Coulomb explosion imaging.
- Debadarshini Mishra
- , Aaron C. LaForge
- & Nora Berrah
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Article
| Open AccessThermal disorder prevents the suppression of ultra-fast photochemistry in the strong light-matter coupling regime
The aim of polaritonic chemistry is to control photochemical reactions by placing molecules inside optical cavities. Here, the authors show that this is not directly possible due to thermal disorder, which is unavoidable in real experiments, and polaritons mostly channel molecular excitations.
- Arpan Dutta
- , Ville Tiainen
- & J. Jussi Toppari
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| Open AccessNarrowband clusteroluminescence with 100% quantum yield enabled by through-space conjugation of asymmetric conformation
Clusteroluminescence from nonconjugated luminogens relies on noncovalent through-space conjugation of electrons resulting in low luminescent efficiency and broad emission. Here the authors construct several nonconjugated luminogens to reveal the structure property relationship and demonstrate narrowband clusteroluminescence with high emission efficiency.
- Yipu Wang
- , Jianyu Zhang
- & Ben Zhong Tang
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Article
| Open AccessSymmetry-breaking dynamics of a photoionized carbon dioxide dimer
In a time-resolved Coulomb explosion imaging study using ultrafast extreme ultraviolet pulses, combined with theoretical simulations, authors reveal unexpected asymmetric rearrangement of carbon dioxide dimer ion, including a CO3 moiety formation.
- Ester Livshits
- , Dror M. Bittner
- & Daniel Strasser
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| Open AccessA solution for 4-propylguaiacol hydrodeoxygenation without ring saturation
Solvents play a crucial role in catalysis, affecting both activity and selectivity. Here the authors demonstrate how solvent affinity to the catalyst surface influences the reaction pathways of 4-propylguaiacol.
- Zihao Zhang
- , Qiang Li
- & Patrick Hemberger
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Article
| Open AccessChiral inversion induced by aromatic interactions in short peptide assembly
The role of hydrophobic interactions in the regulation of the handedness of peptide superstructures is unknown. Here, the authors show that aromatic side chains set the twisting directions of the single β-strands of peptide amphiphiles.
- Kai Qi
- , Hao Qi
- & Hai Xu
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Article
| Open AccessElectron iso-density surfaces provide a thermodynamically consistent representation of atomic and molecular surfaces
The precise definition of the surface of atoms and molecules has long been an open issue. Here, the authors combine theory and experimental thermodynamic measurements to define atomic and molecular surfaces from electron iso-density surfaces contoured at a value of 0.0016 a.u.
- Amin Alibakhshi
- & Lars V. Schäfer
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| Open AccessLight-induced Kondo-like exciton-spin interaction in neodymium(II) doped hybrid perovskite
The Kondo effect usually refers to increased electrical resistance in metals due to spin-spin interactions between localized magnetic impurities and conduction electrons. Here the authors report a Kondo-like coupling between a light-induced exciton and localized impurity spins in Nd-doped hybrid perovskite.
- Xudong Xiao
- , Kyaw Zin Latt
- & Tao Xu
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Article
| Open AccessDissecting diazirine photo-reaction mechanism for protein residue-specific cross-linking and distance mapping
Photo-cross-linking (PXL) with alkyl diazirines can provide stringent distance restraints and offer insights into protein structures, but unambiguous identification of cross-linked residues hinders data interpretation. Here, the authors report a quantitative analysis of alkyl diazirine photo-cross-linking reactions and reveal a two-step mechanism, enabling selective targeting of buried polar residues.
- Yida Jiang
- , Xinghe Zhang
- & Chun Tang
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| Open AccessInverse mapping of quantum properties to structures for chemical space of small organic molecules
A mapping linking a desired molecular property to a 3D structure would facilitate molecular design. Here, the authors parameterize the chemical space of small organic molecules using quantum properties via machine learning, providing insights into targeted molecular design.
- Alessio Fallani
- , Leonardo Medrano Sandonas
- & Alexandre Tkatchenko
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Article
| Open AccessLearning a reactive potential for silica-water through uncertainty attribution
Accurate molecular dynamics of silicate reactivity in aqueous solution at large length and time scale is required to decipher silica condensation. Here, authors developed a potential with a new active learning method to capture silica-water interactions.
- Swagata Roy
- , Johannes P. Dürholt
- & Rafael Gómez-Bombarelli
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Article
| Open AccessNanosecond chain dynamics of single-stranded nucleic acids
By combining single-molecule spectroscopy, nanophotonic enhancement, and molecular simulations, the authors reveal the extremely rapid chain dynamics of single-stranded nucleic acids.
- Mark F. Nüesch
- , Lisa Pietrek
- & Benjamin Schuler
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Article
| Open AccessLaboratory infrared spectra and fragmentation chemistry of sulfur allotropes
Sulfur allotropes are proposed to be an important sulfur reservoir in molecular clouds, but spectroscopic data to test this hypothesis are limited. Here the authors measure laboratory far-infrared spectra of cold isolated S8 molecules, which show a near-perfect match with calculations, and examine their fragmentation pathways.
- Piero Ferrari
- , Giel Berden
- & Joost M. Bakker
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Article
| Open AccesspH drives electron density fluctuations that enhance electric field-induced liquid flow
The authors combine optical surface measurements and simulations to delve into the pH-dependent electrophoretic mobility of hexadecane nanodroplets in water and show the importance of going beyond classical continuum models for an accurate description.
- S. Pullanchery
- , S. Kulik
- & S. Roke
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| Open AccessOverhauser enhanced liquid state nuclear magnetic resonance spectroscopy in one and two dimensions
The authors report signal enhancements in high-resolution liquid-state NMR by a new setup for dynamic nuclear polarization. Two-dimensional NMR techniques are used to transfer hyperpolarization within the nuclei of molecules such as metabolites or drugs.
- Marcel Levien
- , Luming Yang
- & Marina Bennati
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Article
| Open AccessTwo-dimensional bilayer ice in coexistence with three-dimensional ice without confinement
Icing plays an important role in various physical-chemical process. Here, the authors identify a critical value of surface energy parameter, above which two-dimensional and three-dimensional coexisting ice can form on the surface.
- Jing Jiang
- , Yuanming Lai
- & Fan Yu
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Article
| Open AccessAggregation promotes charge separation in fullerene-indacenodithiophene dyad
Light-harvesting applications require dyes with efficiently formed long-lived charge separated electronic states. Here the authors achieve this through aggregation in fullerene dyads and reveal their excited-state dynamics mechanism.
- Chong Wang
- , Bo Wu
- & Chunru Wang
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| Open AccessLiquid-liquid reactions performed by cellular reactors
This study presents a 3D-printed cellular reactor enhancing liquid-liquid reactions by increasing contact area without extra additives. It securely contains two incompatible liquids, facilitating direct phase separation.
- Jinzhe Cao
- & Shengyang Tao
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| Open AccessHydrogen bond symmetrisation in D2O ice observed by neutron diffraction
Atomic distribution in high-pressure water ice are directly observed, via neutron powder structure analysis, found hydrogen bonds become symmetric at pressures about 80 GPa, marking the transition from ice VII to ice X.
- Kazuki Komatsu
- , Takanori Hattori
- & Hiroyuki Kagi
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| Open AccessProbing the structure of water in individual living cells
Here the authors report a Raman scattering technique to measure vibrational spectrum of water inside living cells. A consistent population (~3%) of non-bulk-like water is seen, exhibiting a more disordered structure with a weakened hydrogen-bonded network.
- Xiaoqi Lang
- , Lixue Shi
- & Wei Min
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| Open AccessAn electrochemically responsive B–O dynamic bond to switch photoluminescence of boron-nitrogen-doped polyaromatics
Boron-doped polycyclic aromatic hydrocarbons with dynamic covalent bonds have interesting optical properties, but electricity-responsive bonds are less studied. Here, the authors report an electrochemically responsive B-O coordination bond with short switching time.
- Baige Yang
- , Yu-Mo Zhang
- & Sean Xiao-An Zhang
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Article
| Open AccessPhotochromic luminescence of organic crystals arising from subtle molecular rearrangement
Color-changing emissions in organic crystals are often realized via photochemical reactions of their molecules. Here, the authors demonstrate reversible color change through more simple molecular rearrangements with application in encryption and data storage.
- Zihao Zhao
- , Yusong Cai
- & Wang Zhang Yuan
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| Open AccessDirect production of low-oxygen-concentration titanium from molten titanium
Titanium has a strong affinity to oxygen, resulting in an increase in the manufacturing cost and complexity of the processes. Here the authors introduce a high-throughput technique using yttrium that can reduce the oxygen content in molten titanium to the level suitable for structural applications.
- Toru H. Okabe
- , Gen Kamimura
- & Takanari Ouchi
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| Open AccessEvolution of the ionisation energy with the stepwise growth of chiral clusters of [4]helicene
Polycyclic aromatic hydrocarbons such as [4]helicenes are important interstellar molecules. Here, the authors show their evolution of chiral clusters upon aggregation through coincidence spectroscopy and quantum chemical calculations.
- Sérgio R. Domingos
- , Denis S. Tikhonov
- & Melanie Schnell
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| Open AccessSub-100-fs energy transfer in coenzyme NADH is a coherent process assisted by a charge-transfer state
Excitation energy transfer is important for many photoinduced biological processes in systems with multiple chromophores. Here, the authors elucidate this process for the coenzyme NADH using ultrafast spectroscopy and quantum dynamics.
- Vishal Kumar Jaiswal
- , Daniel Aranda Ruiz
- & Artur Nenov
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Article
| Open AccessCollective chiroptical activity through the interplay of excitonic and charge-transfer effects in localized plasmonic fields
Chiral interaction of molecular ensembles with confined light fields is elusive. Here, the authors report collective chiroptical effects through coupling of exciton and charge-transfer mixed molecular assemblies with plasmonic nanoparticles.
- Huacheng Li
- , Xin Xu
- & Xiang Lan
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Article
| Open AccessDirect observation of photoinduced sequential spin transition in a halogen-bonded hybrid system by complementary ultrafast optical and electron probes
Halogen bond is desired for tuning electronic properties by external stimuli. Here, authors reveal a sequential activation of spin crossover and dimer softening, unveiling a key transient state in a prototypical halogen-bonded material.
- Yifeng Jiang
- , Stuart Hayes
- & R. J. Dwayne Miller
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Article
| Open AccessEfficient intersystem crossing and tunable ultralong organic room-temperature phosphorescence via doping polyvinylpyrrolidone with polyaromatic hydrocarbons
Room temperature phosphorescent polymers have potential in a range of applications, but achieving the desired properties can be challenging. Here, the authors report the development of such polymer materials by doping with polyaromatic hydrocarbons.
- Guangxin Yang
- , Subin Hao
- & Li Dang
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Article
| Open AccessX-ray radiation damage cycle of solvated inorganic ions
A radiation damage cycle in X-ray-ionized solvated Mg ions is reported by the authors leading to production of water radicals and low-energy electrons. The Mg ion ends in its initial state quickly and can restart the cycle, multiplying the local damage.
- Dana Bloß
- , Florian Trinter
- & Andreas Hans
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Article
| Open AccessOrganic and inorganic sublattice coupling in two-dimensional lead halide perovskites
By resonant pumping the organic cation in 2D perovskite, Fu et al. report the electronic and mechanical couplings between the organic and inorganic sublattices, evidenced by the reduced bandgap and modified lattice degree of freedom within the inorganic sublattice, and slow heat transfer process.
- Jianhui Fu
- , Tieyuan Bian
- & Tze Chien Sum
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Article
| Open AccessZero-field J-spectroscopy of quadrupolar nuclei
Zero to ultralow-field NMR provides chemical information in the absence of a high magnetic field but it is difficult to measure molecules with quadrupolar nuclei due to their fast relaxation. This study examines zero-field J-spectra from isotopologues of ammonium cations, with quadrupolar nuclei, revealing the presence of a primary isotope effect of −58 mHz.
- Román Picazo-Frutos
- , Kirill F. Sheberstov
- & Danila A. Barskiy
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Article
| Open AccessReal-time observation of two distinctive non-thermalized hot electron dynamics at MXene/molecule interfaces
Photoexcited MXenes could transfer charge carriers to or heat molecules at their interfaces. Here, the authors show using time-resolved spectroscopy that the non-thermalized carriers can directly transfer to molecules or heat them within 125 fs.
- Qi Zhang
- , Wei Li
- & Xueming Yang
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Article
| Open AccessDirect observation of electron transfer in solids through X-ray crystallography
Electron transfer in solids is a fundamental process in many functional nanomaterials. Here, the authors directly observe this process via x-ray crystallography for incorporating of electron-donor guest molecules in macrocyclic nanotube crystals.
- Daiji Ogata
- , Shota Koide
- & Junpei Yuasa