The Journal of Physical Chemistry A最新文献

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Hydrogen Bond "Double-Edged Sword Effect" on Organic Room-Temperature Phosphorescence Properties: A Theoretical Perspective. 氢键对有机室温磷光性质的“双刃剑效应”:一个理论视角。
IF 2.7 2区 化学
The Journal of Physical Chemistry A Pub Date : 2025-01-09 Epub Date: 2024-12-29 DOI: 10.1021/acs.jpca.4c07525
Songsong Liu, Yang Gao, Chen Zhao, Lili Lin, Chuan-Kui Wang, Yuzhi Song, Jianzhong Fan
{"title":"Hydrogen Bond \"Double-Edged Sword Effect\" on Organic Room-Temperature Phosphorescence Properties: A Theoretical Perspective.","authors":"Songsong Liu, Yang Gao, Chen Zhao, Lili Lin, Chuan-Kui Wang, Yuzhi Song, Jianzhong Fan","doi":"10.1021/acs.jpca.4c07525","DOIUrl":"https://doi.org/10.1021/acs.jpca.4c07525","url":null,"abstract":"<p><p>The strategy of designing efficient room-temperature phosphorescence (RTP) emitters based on hydrogen bond interactions has attracted great attention in recent years. However, the regulation mechanism of the hydrogen bond on the RTP property remains unclear, and corresponding theoretical investigations are highly desired. Herein, the structure-property relationship and the internal mechanism of the hydrogen bond effect in regulating the RTP property are studied through the combination of quantum mechanics and molecular mechanics methods (QM/MM) coupled with the thermal vibration correlation function method. Intermolecular interactions, excited-state transition properties, reorganization energies, radiative and nonradiative decay rates, and the intersystem crossing rates are analyzed in detail. Results show that intermolecular hydrogen bonds can effectively delocalize molecular orbitals, enhance spin-orbit coupling (SOC) effect, and thus accelerate intersystem crossing (ISC) processes. In addition, an intermolecular hydrogen bond can also suppress nonradiative transition by restricting molecular motion, thereby promoting generation of phosphorescence. However, an excessively enhanced intermolecular hydrogen bond effect promotes molecular vibrations, leading to increased reorganization energies and thus facilitating nonradiative energy consumption process. The hydrogen bond \"double-edged sword\" effect on RTP properties and nonradiative decay process is theoretically revealed. Therefore, reasonable control of the hydrogen bond strength is beneficial for the development of efficient RTP emitters. Our research provides rational explanations for previous measurements and highlights the hydrogen bond effect in constructing efficient RTP emitters.</p>","PeriodicalId":59,"journal":{"name":"The Journal of Physical Chemistry A","volume":"129 1","pages":"180-189"},"PeriodicalIF":2.7,"publicationDate":"2025-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142941577","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Triazolide Complexes of Sodium and Potassium in the Gas Phase. 气相中钠和钾的三唑烷配合物。
IF 2.7 2区 化学
The Journal of Physical Chemistry A Pub Date : 2025-01-09 Epub Date: 2024-12-23 DOI: 10.1021/acs.jpca.4c07801
Arthur E Lee, Cailum M K Stienstra, Terrance B McMahon, W Scott Hopkin
{"title":"Triazolide Complexes of Sodium and Potassium in the Gas Phase.","authors":"Arthur E Lee, Cailum M K Stienstra, Terrance B McMahon, W Scott Hopkin","doi":"10.1021/acs.jpca.4c07801","DOIUrl":"10.1021/acs.jpca.4c07801","url":null,"abstract":"<p><p>Aromatic organometallic complexes, such as ferrocene and the \"inverse sandwich complex\" [Na<sub>2</sub>Cp]<sup>+</sup>, are stabilized via charge-transfer (C-T) interactions and cation-π interactions (i.e., charge-induced dipole and charge-quadrupole interactions). Much effort has gone into investigating systems that contain organic moieties, such as benzene or cyclopentadienyl ligands, but less attention has been paid to aromatic systems that contain heteroatoms (e.g., N), possibly owing to the complexity arising from a lowering of symmetry and the introduction of electron lone pair density and dipole moments. Here we investigate sodiated and potassiated clusters of 1,2,3-triazolide, [M<sub><i>x</i></sub> (123T)<sub><i>x</i>-1</sub>]<sup>+</sup> (<i>x</i> = 3, 4; M = Na, K), and 1,2,4-triazolide, [M<sub><i>x</i></sub> (124T)<sub><i>x</i>-1</sub>]<sup>+</sup> (<i>x</i> = 3, 4; M = Na, K), using a combination of infrared ion spectroscopy (IRIS) and DFT calculations. Cluster structures are strongly influenced by charge-dipole interactions and C-T interactions from N lone pairs to the metal cations. IRIS spectra indicated that the geometries of the triazolide moieties are essentially unperturbed by the interaction with the metal ions. Additional spectral features, not predicted by DFT calculations, that are observed in the 1500-1800 cm<sup>-1</sup> region seem to be associated with combination bands involving C-H wagging and ring torsion motions.</p>","PeriodicalId":59,"journal":{"name":"The Journal of Physical Chemistry A","volume":" ","pages":"190-197"},"PeriodicalIF":2.7,"publicationDate":"2025-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142875351","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Properties of NoO and YbO. NoO和YbO的性质。
IF 2.7 2区 化学
The Journal of Physical Chemistry A Pub Date : 2025-01-09 Epub Date: 2024-12-27 DOI: 10.1021/acs.jpca.4c07245
João G F Romeu, Sarah Sprouse, David A Dixon
{"title":"Properties of NoO and YbO.","authors":"João G F Romeu, Sarah Sprouse, David A Dixon","doi":"10.1021/acs.jpca.4c07245","DOIUrl":"10.1021/acs.jpca.4c07245","url":null,"abstract":"<p><p>Bond dissociation energies (BDEs) and spectroscopic parameters for the ground states of YbO and NoO were calculated at the Brueckner doubles (BD(T)) level and for NoO at the coupled cluster CCSD(T) level based on the closed-shell configurations Yb<sup>2+</sup>(4f<sup>14</sup>)O<sup>2-</sup>(2p<sup>6</sup>) and No<sup>2+</sup>(5f<sup>14</sup>)O<sup>2-</sup>(2p<sup>6</sup>). For YbO, the BD(T) BDE (3.93 eV) and vibrational frequency (686.3 cm<sup>-1</sup>) are consistent with the experiment; the BD(T) bond distance was 1.8492 Å, about 0.04 Å longer than the experiment. For NoO, the calculated BDEs are 3.07 eV (BD(T)) and 3.08 eV (CCSD(T)) and are expected to be good to ±3 kcal/mol (±0.13 eV). Potential energy curves (PECs) for the spin-orbit (Ω) states associated with the f<sup>13</sup>s<sup>1</sup> configurations of YbO and NoO were calculated at the SA-CASSCF/SO-CASPT2/aQ-DK level. PECs considering both the f<sup>13</sup>s<sup>1</sup> and f<sup>14</sup> configurations were calculated at this level, as the ground states are expected to contain both configurations. Due to a bias in the SA-CASSCF to the f<sup>13</sup>s<sup>1</sup> configurations, the f<sup>14</sup> configurations could not be properly described simultaneously with the f<sup>13</sup>s<sup>1</sup> ones. The natural population analysis based on the natural bond orbitals shows that YbO and NoO are quite ionic, with 5d orbitals being more important in YbO than the 6d orbitals in NoO.</p>","PeriodicalId":59,"journal":{"name":"The Journal of Physical Chemistry A","volume":" ","pages":"162-173"},"PeriodicalIF":2.7,"publicationDate":"2025-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142890546","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Conformational Space of 3-Chloropropionic Acid in Gas Phase Explored by Rotational Spectroscopy. 旋转光谱法研究3-氯丙酸气相构象空间。
IF 2.7 2区 化学
The Journal of Physical Chemistry A Pub Date : 2025-01-09 Epub Date: 2024-12-26 DOI: 10.1021/acs.jpca.4c06857
Fufei Sun, Assimo Maris, Luca Evangelisti, Wentao Song, Sonia Melandri, J Ricardo Morán, Camilla Calabrese, Alberto Lesarri
{"title":"Conformational Space of 3-Chloropropionic Acid in Gas Phase Explored by Rotational Spectroscopy.","authors":"Fufei Sun, Assimo Maris, Luca Evangelisti, Wentao Song, Sonia Melandri, J Ricardo Morán, Camilla Calabrese, Alberto Lesarri","doi":"10.1021/acs.jpca.4c06857","DOIUrl":"10.1021/acs.jpca.4c06857","url":null,"abstract":"<p><p>The conformational space of 3-chloropropionic acid has been studied under the isolated conditions of a supersonic expansion using Stark-modulated free-jet absorption millimeter-wave and centimeter-wave chirped-pulse Fourier transform microwave spectroscopy techniques. The rotational spectra originating from the three most stable conformers including <sup>35</sup>Cl and <sup>37</sup>Cl isotopologues were observed in both experiments using helium expansion while a partial conformational relaxation involving skeletal rearrangements takes place in an argon expansion. The rotational parameters, geometries, and energy order were determined from the experiment, allowing a comparison with quantum chemical predictions. B3LYP-D3(BJ)/def2-TZVP performs slightly better than MP2/aug-cc-pVTZ in reproducing the molecular geometries. The deviations are largerfor conformers showing intramolecular interactions. It is also shown that the Douglas-Kroll-Hess second-order scalar relativistic core Hamiltonian approach in the point nuclear approximation is needed to accurately reproduce the electronic properties encoded in the fully determined nuclear quadrupole coupling constant tensors.</p>","PeriodicalId":59,"journal":{"name":"The Journal of Physical Chemistry A","volume":" ","pages":"109-118"},"PeriodicalIF":2.7,"publicationDate":"2025-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142890697","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Rotational Excitation Cross Sections for Chloronium Based on a New 5D Interaction Potential with Molecular Hydrogen. 基于与氢分子5D相互作用势的氯鎓旋转激发截面。
IF 2.7 2区 化学
The Journal of Physical Chemistry A Pub Date : 2025-01-09 Epub Date: 2024-12-30 DOI: 10.1021/acs.jpca.4c07467
Sándor Demes, Dariusz Kędziera, Alexandre Faure, François Lique
{"title":"Rotational Excitation Cross Sections for Chloronium Based on a New 5D Interaction Potential with Molecular Hydrogen.","authors":"Sándor Demes, Dariusz Kędziera, Alexandre Faure, François Lique","doi":"10.1021/acs.jpca.4c07467","DOIUrl":"https://doi.org/10.1021/acs.jpca.4c07467","url":null,"abstract":"<p><p>Chloronium (H<sub>2</sub>Cl<sup>+</sup>) is an important intermediate of Cl-chemistry in space. The accurate knowledge of its collisional properties allows a better interpretation of the corresponding observations in interstellar clouds and, therefore, a better estimation of its abundance in these environments. While the ro-vibrational spectroscopy of H<sub>2</sub>Cl<sup>+</sup> is well-known, the studies of its collisional excitation are rather limited and these are available for the interaction with helium atoms only. We provide a new 5-dimensional rigid rotor potential energy surface for the interaction of H<sub>2</sub>Cl<sup>+</sup> with H<sub>2</sub>, calculated from explicitly correlated coupled cluster <i>ab initio</i> theory, which was fitted then with a set of analytical functions, allowing to perform scattering calculations using accurate quantum theories. We analyze the collision-energy dependence of the rotational state-to-state cross sections and the temperature-dependence of the corresponding thermal rate coefficients, with particular attention on the collisional propensity rules. When comparing our results for collisions with H<sub>2</sub> with those obtained with He as a colliding partner, we found very significant differences with nonlinear scaling trends, which proves again that He is not a suitable proxy for collisions between hydride molecules and molecular hydrogen, the most abundant gas particle in the interstellar medium.</p>","PeriodicalId":59,"journal":{"name":"The Journal of Physical Chemistry A","volume":"129 1","pages":"253-261"},"PeriodicalIF":2.7,"publicationDate":"2025-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142941578","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Revisiting the Optical Spectrum of the Plutonyl Ion (PuO2)2+ in 1 M HClO4. 重访1 M HClO4中钚基离子(PuO2)2+的光谱。
IF 2.7 2区 化学
The Journal of Physical Chemistry A Pub Date : 2025-01-09 Epub Date: 2024-12-18 DOI: 10.1021/acs.jpca.4c05837
Norman M Edelstein
{"title":"Revisiting the Optical Spectrum of the Plutonyl Ion (PuO<sub>2</sub>)<sup>2+</sup> in 1 M HClO<sub>4</sub>.","authors":"Norman M Edelstein","doi":"10.1021/acs.jpca.4c05837","DOIUrl":"10.1021/acs.jpca.4c05837","url":null,"abstract":"<p><p>The analysis of the solution absorption spectrum of the plutonyl ion in an aqueous environment was given by Eisenstein and Pryce (E&P) in 1968. In 2011 a new spectrum was published of the (PuO<sub>2</sub>)<sup>2+</sup> ion in 1 M HClO<sub>4</sub>. We have been provided with the original data of this spectrum and have found in the data a previously unreported low-lying transition at 7385 cm<sup>-1</sup> which we have assigned as a magnetic dipole transition. We have fit most of the near-infrared and optical transitions with Gaussian fits and tabulated a new energy level list up to 22,000 cm<sup>-1</sup> which mostly agrees with the data of E&P. We assumed a crystal field of D<sub>∞h</sub> (only axial symmetry) and utilized the intensity calculations published for the isoelectronic (NpO<sub>2</sub>)<sup>1+</sup> ion using a complete basis set for the 5f<sup>2</sup> problem including the Coulombic, spin-orbit as well as the crystal field Hamiltonian. Our results differ substantially from those of E&P. Subsequently, we used a truncated Hamiltonian to try to establish the effects of assuming the σ antibonding orbitals are at such high energies that we can ignore their contributions to the lower lying φ and δ orbitals.</p>","PeriodicalId":59,"journal":{"name":"The Journal of Physical Chemistry A","volume":" ","pages":"50-57"},"PeriodicalIF":2.7,"publicationDate":"2025-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11726671/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142851656","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Convergence Analysis and Predictions for Optimizing Reciprocal Grids: A First-Principles and Machine Learning Study. 优化互反网格的收敛分析和预测:第一原理和机器学习研究。
IF 2.7 2区 化学
The Journal of Physical Chemistry A Pub Date : 2025-01-09 Epub Date: 2024-12-16 DOI: 10.1021/acs.jpca.4c05782
Jinyoung Byun, Donggeon Lee, Euyheon Hwang, Sooran Kim, Ji-Sang Park
{"title":"Convergence Analysis and Predictions for Optimizing Reciprocal Grids: A First-Principles and Machine Learning Study.","authors":"Jinyoung Byun, Donggeon Lee, Euyheon Hwang, Sooran Kim, Ji-Sang Park","doi":"10.1021/acs.jpca.4c05782","DOIUrl":"10.1021/acs.jpca.4c05782","url":null,"abstract":"<p><p>When crystalline materials are investigated by performing first-principles density functional theory (DFT) calculations, the reciprocal grid should be fine enough to obtain the converged total energy and electronic structure. Herein, we performed a convergence test of the total energy for the density of reciprocal points to determine fine enough reciprocal grids for high-throughput calculations. Our results show that the nonlinearity of the band structures affects the convergence of the total energy, especially for materials with a finite band gap. We further investigate which physical properties make a finer reciprocal grid necessary based on machine learning (ML) analysis. Our developed models using DFT-based features and elemental properties-based features exhibit <i>R</i><sup>2</sup> of 0.803 and 0.880, respectively. Our ML model quantitatively shows the importance of nonlinearity and band gaps in predicting errors in total energy calculations. Furthermore, our ML model using elemental features can be applied to estimate the appropriate reciprocal grid, facilitating high-throughput calculations.</p>","PeriodicalId":59,"journal":{"name":"The Journal of Physical Chemistry A","volume":" ","pages":"367-372"},"PeriodicalIF":2.7,"publicationDate":"2025-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142833158","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Super-Resolved Fluorescence Lifetime Imaging of Single Cy3 Molecules and Quantum Dots Using Time-Correlated Single Photon Counting with a Four-Pixel Fiber Optic Array Camera. 基于时间相关单光子计数的四像素光纤阵列相机超分辨Cy3分子和量子点的荧光寿命成像。
IF 2.7 2区 化学
The Journal of Physical Chemistry A Pub Date : 2025-01-09 Epub Date: 2024-12-19 DOI: 10.1021/acs.jpca.4c05143
Liam A Koch, Megan K Dunlap, Duncan P Ryan, James H Werner, Peter M Goodwin, Christopher M Green, Sebastián A Díaz, Igor L Medintz, Kimihiro Susumu, Michael H Stewart, Martin P Gelfand, Alan Van Orden
{"title":"Super-Resolved Fluorescence Lifetime Imaging of Single Cy3 Molecules and Quantum Dots Using Time-Correlated Single Photon Counting with a Four-Pixel Fiber Optic Array Camera.","authors":"Liam A Koch, Megan K Dunlap, Duncan P Ryan, James H Werner, Peter M Goodwin, Christopher M Green, Sebastián A Díaz, Igor L Medintz, Kimihiro Susumu, Michael H Stewart, Martin P Gelfand, Alan Van Orden","doi":"10.1021/acs.jpca.4c05143","DOIUrl":"10.1021/acs.jpca.4c05143","url":null,"abstract":"<p><p>Time-resolved single molecule localization microscopy (TR-SMLM) with a 2 × 2 pixel fiber optic array camera was combined with time-correlated single photon counting (TCSPC) to obtain super-resolved fluorescence lifetime images of individual Cy3 dye molecules and individual colloidal CdSe/CdS/ZnS core/shell/shell semiconductor quantum dots (QDs). The characteristic blinking and bleaching behavior of the Cy3 and the blinking behavior of the QD emitters were used as distinguishing optical characteristics to isolate them and determine their centroid locations with spatial resolution below the optical diffraction limit. TCSPC was used to characterize the fluorescence lifetime and intensity corresponding to each emitter location. The mean centroid locations of the QDs could be determined with a precision of ∼1-4 nm, and the mean centroid locations of the Cy3 molecules could be determined with a precision of ∼2-9 nm, depending on the number of photons collected during the observation time. In a super-resolved fluorescence lifetime image with a single Cy3 dye molecule and a single QD separated by ∼34 nm, the two emitters were distinguished based on the average photon arrival times with respect to the excitation laser pulse observed during time intervals when only one emitter was in the on state, ∼6 ns for Cy3 and ∼17 ns for the QD. The mean distance between the two emitters was determined with a precision of ∼8 nm. The feasibility of using this super-resolved fluorescence lifetime imaging technique to investigate QD-dye complexes that use Förster resonance energy transfer (FRET) and/or electron transfer to form optical biosensors is discussed.</p>","PeriodicalId":59,"journal":{"name":"The Journal of Physical Chemistry A","volume":" ","pages":"3-13"},"PeriodicalIF":2.7,"publicationDate":"2025-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142862539","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Vibronic Interactions in the Photoelectron Spectra of CAl3Ge-: A Theoretical Study. CAl3Ge-光电子能谱中的振动相互作用:理论研究。
IF 2.7 2区 化学
The Journal of Physical Chemistry A Pub Date : 2025-01-09 Epub Date: 2024-12-26 DOI: 10.1021/acs.jpca.4c05354
Rishabh Kumar Pandey, Arun Kumar Kanakati, Shyam Sharan Tripathi, Tammineni Rajagopala Rao
{"title":"Vibronic Interactions in the Photoelectron Spectra of CAl<sub>3</sub>Ge<sup>-</sup>: A Theoretical Study.","authors":"Rishabh Kumar Pandey, Arun Kumar Kanakati, Shyam Sharan Tripathi, Tammineni Rajagopala Rao","doi":"10.1021/acs.jpca.4c05354","DOIUrl":"10.1021/acs.jpca.4c05354","url":null,"abstract":"<p><p>This study probes the vibronic interactions in the photoelectron spectra of CAl<sub>3</sub>Ge<sup>-</sup>, exploring its six excited electronic states through an approach that combines the <i>ab initio</i> electronic structure calculations and the quantum nuclear dynamics. Central to this investigation is utilizing a model diabatic Hamiltonian, which allows for the exact evaluation of Hamiltonian parameters and fitting potential energy cuts (PECs). Notably, the analysis of these PECs uncovers pronounced nonadiabatic effects within the photoelectron spectra, emphasized by the presence of multiple conical intersections. The investigation of nuclear dynamics, with and without the same spatial symmetry coupling, is achieved by employing time-dependent (TD) and time-independent (TI) quantum mechanical methods. These nuclear dynamical studies effectively simulated all the photoelectron spectral bands. Eventually, the theoretical findings conformed well with available experimental observations, highlighting the nonadiabatic effects among the closely situated spectral bands.</p>","PeriodicalId":59,"journal":{"name":"The Journal of Physical Chemistry A","volume":" ","pages":"14-27"},"PeriodicalIF":2.7,"publicationDate":"2025-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142890559","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Exploration of Fusion and Fission of Molecular Assemblies in Aqueous Solution through a Dynamic Clustering Approach. 通过动态聚类方法探索水溶液中分子组装的聚变和裂变。
IF 2.7 2区 化学
The Journal of Physical Chemistry A Pub Date : 2025-01-09 Epub Date: 2024-12-27 DOI: 10.1021/acs.jpca.4c06582
Peicheng Wang, Ying Ren, Wei Chen
{"title":"Exploration of Fusion and Fission of Molecular Assemblies in Aqueous Solution through a Dynamic Clustering Approach.","authors":"Peicheng Wang, Ying Ren, Wei Chen","doi":"10.1021/acs.jpca.4c06582","DOIUrl":"10.1021/acs.jpca.4c06582","url":null,"abstract":"<p><p>To understand the mechanism of self-assembly and to predict the evolutionary pattern of the fusion-fission system over a long period of time, studying the dynamics of these processes is of great significance. The trajectories from molecular dynamics (MD) simulations of self-assembly processes contain numerous latent fusion and fission events. To analyze the fusion and fission events from the simulated trajectory, in this article, a dynamic clustering approach was developed by comparing the changes of monomer composition within clusters over simulated time. The rates of fusion and fission events obtained from dynamic clustering analysis were further coupled with the population balance model (PBM), and the evolution of the molecular assemblies calculated is reasonably consistent with the corresponding MD simulation results. This approach provides a new idea to analyze the big data of molecular self-assembly dynamics obtained from MD simulations, and it offers a computationally achievable approach to connect discrete events at the molecular scale with continuum equations such as the PBM at the macroscale.</p>","PeriodicalId":59,"journal":{"name":"The Journal of Physical Chemistry A","volume":" ","pages":"373-384"},"PeriodicalIF":2.7,"publicationDate":"2025-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142890542","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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