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Open research questions in Spectroscopy and Quantum Chemical Studies

136 unresolved questions extracted from the limitations and future-work sections of 719 Spectroscopy and Quantum Chemical Studies papers in our library. Each links back to the study that raised it.

What the literature leaves open

  • The intrinsic complexity of supramolecular systems remains a challenge, - The mobility of charged species is a critical factor in utilizing charged species generated through CS in OPV

    Dielectric-tuned charge and exciton dynamics in perylene bisimide supramolecular aggregates · 2026 · DOI

  • Managing the coupling strength between the charged species by introducing the linker structures between donor and acceptor, - Altering the packing structure between PBI units to tune the non-diffusive character of charged species

    Dielectric-tuned charge and exciton dynamics in perylene bisimide supramolecular aggregates · 2026 · DOI

  • Further studies can explore the application of the algorithm to larger molecular systems, - The effects of noise on the dissipative dynamics can be investigated, - The algorithm can be compared with other methods for preparing excited states, - The algorithm can be used to study the dynamics of excited states in various molecular systems

    Dissipative Quantum Algorithms for Excited-State Quantum Chemistry · 2026 · DOI

  • Accurate and efficient methods for preparing electronic excited states on quantum devices are lacking. Prior methods, such as quantum phase estimation, require good initial states, which can be difficult to construct. The development of quantum algorithms that do not rely on high-quality initial states is needed.

    Dissipative Quantum Algorithms for Excited-State Quantum Chemistry · 2026 · DOI

  • How- ever, the model did not account for crystal lattice imperfections and intermolecular coupling, leading to a T1,short value 65.

    Dominant vibronic relaxation channels in a europium-based molecular qubit · 2026

  • Yet, the response of neat interfacial water to visible photons has not been directly quantified at both macroscopic and molecular scales.

    Visible light leaves evaporation and interfacial structure of neat water unchanged at the air–water interface · 2026 · DOI

  • Ion-dipole interactions are well defined in small-molecule systems, but in macromolecular systems, their behaviors remain insufficiently understood due to structural complexity and binding heterogeneity.

    Stoichiometric-like ion–dipole coordination saturation in an isolated polymer–ion system: Single-molecule force spectroscopy and theoretical insights · 2026 · DOI

  • However, their underlying structure-transport relationships remain poorly understood in wide-temperature and nanoconfinement environments.

    Threefold-Hierarchical Transport of Highly Concentrated Aqueous Electrolyte Mediated by Environment-Reconstructed Ion Correlation Networks · 2026 · DOI

  • To obtain better insight, many studies have combined experimental measurements with classical molecular dynamics simulations, yet their interpretation remains limited by the empirical nature of the classical force fields.

    Ion Distribution and Cation Exchange at Mica–Electrolyte Interfaces Probed with Deep Potential Molecular Dynamics · 2026 · DOI

  • However, the kinetics across materials and electrolyte pH and the impact of hydrogen coverage at high current densities remain poorly understood.

    Bias Dependence of the Transition State of the Hydrogen Evolution Reaction · 2025 · DOI

  • While the mechanism of this reaction has been investigated extensively in the condensed phase, its mechanism at the air–water interface remains elusive, leaving uncertain the contribution that surface-adsorbed CO 2 makes to the overall acidification reaction.

    CO 2 hydration at the air–water interface: A surface-mediated “in-and-out” mechanism · 2025 · DOI

  • Furthermore, the electric field fluctuations de-correlate on a timescale of ∼10 ps, implying that their role in activating much slower chemical reactions remains inconclusive.

    Deconstructing the origins of interfacial catalysis: Why electric fields are inseparable from solvation · 2025 · DOI

  • The microscopic basis of this phenomenon remains elusive and continues to be widely debated.

    Deconstructing the origins of interfacial catalysis: Why electric fields are inseparable from solvation · 2025 · DOI

  • Although various MR diagnostics have been proposed, benchmarking studies that help identify the criteria for an effective diagnostic are still scarce.

    How many distinct and reliable multireference diagnostics are there? · 2025 · DOI

  • Recent studies have cast doubt on this assumption, pointing to a significant effect of damping for liquid water, but the underlying reasons have not yet been investigated.

    Impact of the damping function in dispersion-corrected density functional theory on the properties of liquid water · 2025 · DOI

  • However, the relationship between water's hydrogen bonding and charge transfer characteristics at these interfaces remains poorly understood.

    Charge transfer at air–water interfaces: A machine learning potential-based molecular dynamics study · 2025 · DOI

  • The relative performance of various schemes for either computing accurate K(NΔt) from exact dynamics or obtaining accurate dynamics from exact K(NΔt) warrants further investigation.

    On the discretization error of the discrete generalized quantum master equation · 2025 · DOI

  • The liquid/liquid interfaces of room-temperature ionic liquids (RTILs) play a pivotal role in chemical reactions owing to their characteristic microscopic structure, yet the structure of hydrophobic liquid/RTIL interfaces remains unclear.

    A sum-frequency generation vibrational spectroscopy studies on buried liquid/liquid interfaces of CCl4/[Cnmim][TFSA] (n = 4 and 8) hydrophobic ionic liquids · 2025 · DOI

  • Despite these exciting developments, 2DIR spectroscopy remains limited by Abbe's diffraction limit, which restricts its spatial resolution.

    Action-based two-dimensional infrared spectroscopy on the horizon · 2025 · DOI

  • While some methods can reproduce detailed balance through physically well-motivated algorithmic adaptations, or by construction of a conserved Hamiltonian function, the physical mechanism leading to detailed balance is not understood from first principles.

    Thermal equilibrium in coupled trajectory mixed quantum–classical dynamics · 2025 · DOI

  • Aminoethanol (NH2CH2CH2OH) is a typical flexible molecule with rich conformational isomerism, but its conformational diversity in the gas phase or solutions is not yet fully understood.

    Conformational equilibrium of aminoethanol in the gas phase and in solution driven by intra- and intermolecular interactions and solvent polarity · 2025 · DOI

  • Investigating Chirality-Induced Spin Selectivity (CISS) at the molecular level offers a novel perspective, in between Chemistry and Physics, on this still not fully understood phenomenon.

    Chirality-Induced Spin Selectivity at the Molecular Level: A Different Perspective to Understand and Exploit the Phenomenon · 2025 · DOI

  • We discuss what is accomplished and which are the most important questions, and we propose experiments based on electron and nuclear magnetic resonance both to unravel open issues on the CISS effect in electron transfer and to apply it to quantum technologies.

    Chirality-Induced Spin Selectivity at the Molecular Level: A Different Perspective to Understand and Exploit the Phenomenon · 2025 · DOI

  • Water inherently contains trace amounts of various salts, yet the microscopic processes by which salts influence some of its physical properties remain elusive.

    How Salt Solvation Slows Water Dynamics While Blue-Shifting Its Dielectric Spectrum · 2025 · DOI

  • Environmental effects in the excitation energy transfer (EET) processes have been predominantly modeled by baths of harmonic oscillators; however, the key features of anharmonicities that are overlooked in such descriptions remain poorly understood.

    Hidden Effects of Anharmonic Bath on the Excitation Energy Transfer in the Light Harvesting 2 Complex of Purple Bacteria · 2025 · DOI

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136 open questions have been extracted from the limitations and future-work passages of 719 Spectroscopy and Quantum Chemical Studies papers in our 4.5M-paper local library. Each one below links back to the study that raised it, so you can read the original claim in context.

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