1
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Zhu Z, Wei X, Liang W. A theoretical investigation of benzothiadiazole derivatives for high efficiency OLEDs. J Comput Chem 2024; 45:1603-1613. [PMID: 38520729 DOI: 10.1002/jcc.27352] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2023] [Revised: 03/07/2024] [Accepted: 03/12/2024] [Indexed: 03/25/2024]
Abstract
It is of great importance and worthy of efforts to give a clear structure-property relationship and microscopic mechanism of fluorescence emitters with high quantum yield. In this work, we perform a detailed computational investigation to give an explanation to the high efficiency of a fluorescence emitter XBTD-NPh based TADF sensitized fluorescence (TSF) OLEDs, and construct a symmetry structure DSBNA-BTD. Theoretical calculations show that XBTD-NPh is a long-time phosphorescent material at 77 K and TADF is attributed to the RISC of T1 to S1 state. For DSBNA-BTD, excitons arrived at T1 state comes to a large rate of nonradiatively path to the ground state, meaning it is may not be an efficient TADF molecule. For both molecules, the fast IC between T2 and T1 state results in that the hot exciton channel T1-Tn-S1 makes no contribution to the TADF.
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Affiliation(s)
- Zhiye Zhu
- Key Laboratory of Micro-Nano Materials for Energy Storage and Conversion of Henan Province, Institute of Surface Micro and Nano Materials, College of Chemical and Materials Engineering, Xuchang University, Henan, People's Republic of China
| | - Xiaoqing Wei
- Key Laboratory of Micro-Nano Materials for Energy Storage and Conversion of Henan Province, Institute of Surface Micro and Nano Materials, College of Chemical and Materials Engineering, Xuchang University, Henan, People's Republic of China
| | - Wanzhen Liang
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, Fujian Provincial Key Laboratory of Theoretical and Computational Chemistry, and Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian, People's Republic of China
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2
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Cui X, Yuan H, Chen X, Meng Q, Zhang C. Newly Designed Quasi-intrinsic Photosensitizers for Fluorescence Image-Guided Two-Photon Photodynamic Therapy with Type I/II Photoreactions. J Med Chem 2024; 67:8902-8912. [PMID: 38815214 DOI: 10.1021/acs.jmedchem.4c00191] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/01/2024]
Abstract
In this work, a set of quasi-intrinsic photosensitizers are theoretically proposed based on the 2-amino-8-(1'-β-d-2'-deoxyribofuranosyl)-imidazo[1,2-α]-1,3,5-triazin-4(8H)-one (P), which could pair with the 6-amino-5-nitro-3-(1'-β-d-2'-deoxyribofuranosyl)-2(1H)-pyridone (Z) and keep the essential structural characters of nucleic acid. It is revealed that the ring expansion and electron-donating/electron-withdrawing substitution bring enhanced two-photon absorption and bright photoluminescence of these monomers, thereby facilitating the selective excitation and tumor localization through fluorescence imaging. However, instead of undergoing radiative transition (S1 → S0), the base pairing induced fluorescence quenching and rapid intersystem crossing (S1 → Tn) are observed and characterized by the reduced singlet-triplet energy gaps and large spin-orbit coupling values. To ensure the phototherapeutic properties of the considered base pairs in long-lived T1 state, we examined the vertical electron affinity as well as vertical ionization potential for production of superoxide anions via Type I photoreaction, and their required T1 energy (0.98 eV) to generate singlet oxygen 1O2 via Type II mechanism.
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Affiliation(s)
- Xixi Cui
- School of Physics and Electronics, Shandong Normal University, Jinan 250358, P. R. China
| | - Hongxiu Yuan
- School of Physics and Electronics, Shandong Normal University, Jinan 250358, P. R. China
| | - Xiaolin Chen
- School of Physics and Electronics, Shandong Normal University, Jinan 250358, P. R. China
| | - Qingtian Meng
- School of Physics and Electronics, Shandong Normal University, Jinan 250358, P. R. China
| | - Changzhe Zhang
- School of Physics and Electronics, Shandong Normal University, Jinan 250358, P. R. China
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3
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García-González F, Otero JC, Ávila Ferrer FJ, Santoro F, Aranda D. Linear Vibronic Coupling Approach for Surface-Enhanced Raman Scattering: Quantifying the Charge-Transfer Enhancement Mechanism. J Chem Theory Comput 2024; 20:3850-3863. [PMID: 38687961 PMCID: PMC11099975 DOI: 10.1021/acs.jctc.4c00061] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2024] [Revised: 04/12/2024] [Accepted: 04/15/2024] [Indexed: 05/02/2024]
Abstract
The outstanding amplification observed in surface-enhanced Raman scattering (SERS) is due to several enhancement mechanisms, and standing out among them are the plasmonic (PL) and charge-transfer (CT) mechanisms. The theoretical estimation of the enhancement factors of the CT mechanism is challenging because the excited-state coupling between bright plasmons and dark CT states must be properly introduced into the model to obtain reliable intensities. In this work, we aim at simulating electrochemical SERS spectra, considering models of pyridine on silver clusters subjected to an external electric field E⃗ that represents the effect of an electrode potential Vel. The method adopts quantum dynamical propagations of nuclear wavepackets on the coupled PL and CT states described with linear vibronic coupling models parametrized for each E⃗ through a fragment-based maximum-overlap diabatization. By presenting results at different values of E⃗, we show that indeed there is a relation between the population transferred to the CT states and the total scattered intensity. The tuning and detuning processes of the CT states with the bright PLs as a function of the electric field are in good agreement with those observed in experiments. Finally, our estimations for the CT enhancement factors predict values in the order of 105 to 106, meaning that when the CT and PL states are both in resonance with the excitation wavelength, the CT and PL enhancements are comparable, and vibrational bands whose intensity is amplified by different mechanisms can be observed together, in agreement with what was measured by typical experiments on silver electrodes.
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Affiliation(s)
- Francisco García-González
- Andalucía
Tech, Facultad de Ciencias, Departamento de Química Física, Universidad de Málaga, 29071 Málaga, Spain
| | - Juan Carlos Otero
- Andalucía
Tech, Facultad de Ciencias, Departamento de Química Física, Universidad de Málaga, 29071 Málaga, Spain
| | - Francisco J. Ávila Ferrer
- Andalucía
Tech, Facultad de Ciencias, Departamento de Química Física, Universidad de Málaga, 29071 Málaga, Spain
| | - Fabrizio Santoro
- Istituto
di Chimica dei Composti Organometallici (ICCOM-CNR), Area della Ricerca
del CNR, Via Moruzzi 1, I-56124 Pisa, Italy
| | - Daniel Aranda
- Andalucía
Tech, Facultad de Ciencias, Departamento de Química Física, Universidad de Málaga, 29071 Málaga, Spain
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4
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Gonçalves Dalkiranis G, Costa Basílio F, Nobuyasu RS, de Fátima Curcino da Silva S, Lucia Dias Nogueira S, Moreira Therézio E, Serein-Spirau F, Silva RA, Marletta A. Photoluminescent ellipsometric circular dichroism. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2023; 293:122437. [PMID: 36758363 DOI: 10.1016/j.saa.2023.122437] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/08/2022] [Revised: 01/11/2023] [Accepted: 01/31/2023] [Indexed: 06/18/2023]
Abstract
A novel spectroscopic technique, photoluminescent ellipsometric circular dichroism (PECD), which distinguishes all radiative electronic transitions related to molecular chiral centers. Additionally, it is proposed as complementary to the ellipsometric Raman spectroscopy (ERS) technique, thus establishing a relationship between vibrational modes and electronic transitions, associated with molecular chiral centers. In this way, PECD turns into a powerful technique for chiral material characterization. The PECD technique was performed on a chiral oligomer (1R,2R)-diiminocyclohexane, and its derivative polymer. A complete photophysical characterization in solution was performed to corroborate the new PECD technique.
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Affiliation(s)
- Gustavo Gonçalves Dalkiranis
- Physics Institute of São Carlos, University of São Paulo, 13560-970 São Carlos, SP, Brazil; Catalan Institute of Nanoscience and Nanotechnology (ICN2), Edifici ICN2, Campus UAB, 08193, Bellaterra, Barcelona, Spain.
| | | | - Roberto S Nobuyasu
- Physics and Chemistry Institute, Federal University of Itajubá, CEP 37500-903 Itajubá, MG, Brazil
| | | | | | | | - Françoise Serein-Spirau
- Institut Charles Gerhardt, Ecole Nationale Superieure de Chimie de Montpellier, 34296 Montpellier, France
| | - Raigna A Silva
- Physics Institute, Federal University of Uberlândia, 38400-902 Uberlândia, MG, Brazil
| | - Alexandre Marletta
- Physics Institute, Federal University of Uberlândia, 38400-902 Uberlândia, MG, Brazil
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5
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Karak P, Moitra T, Ruud K, Chakrabarti S. Photophysics of uracil: an explicit time-dependent generating function-based method combining both nonadiabatic and spin-orbit coupling effects. Phys Chem Chem Phys 2023; 25:8209-8219. [PMID: 36881024 DOI: 10.1039/d2cp05955j] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
Abstract
We present a composite framework for calculating the rates of non-radiative deactivation processes, namely internal conversion (IC) and intersystem crossing (ISC), on an equal footing by explicitly computing the non-adiabatic coupling (NAC) and spin-orbit coupling (SOC) constants, respectively. The stationary-state approach uses a time-dependent generating function based on Fermi's golden rule. We validate the applicability of the framework by computing the rate of IC for azulene, obtaining comparable rates to experimental and previous theoretical results. Next, we investigate the photophysics associated with the complex photodynamics of the uracil molecule. Interestingly, our simulated rates corroborate experimental observations. Detailed analyses using Duschinsky rotation matrices, displacement vectors and NAC matrix elements are presented to interpret the findings alongside testing the suitability of the approach for such molecular systems. The suitability of the Fermi's golden rule based method is explained qualitatively in terms of single-mode potential energy surfaces.
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Affiliation(s)
- Pijush Karak
- Department of Chemistry, University of Calcutta, 92 A.P.C Road, Kolkata-700009, West Bengal, India.
| | - Torsha Moitra
- Hylleraas Centre for Quantum Molecular Sciences, Department of Chemistry, University of Tromsø-The Arctic University of Norway, 9037 Tromsø, Norway.
| | - Kenneth Ruud
- Hylleraas Centre for Quantum Molecular Sciences, Department of Chemistry, University of Tromsø-The Arctic University of Norway, 9037 Tromsø, Norway. .,Norwegian Defence Research Establishment, P.O.Box 25, 2027 Kjeller, Norway
| | - Swapan Chakrabarti
- Department of Chemistry, University of Calcutta, 92 A.P.C Road, Kolkata-700009, West Bengal, India.
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6
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Xu Q, Liu Y, Wang M, Cerezo J, Improta R, Santoro F. The Resonance Raman Spectrum of Cytosine in Water: Analysis of the Effect of Specific Solute-Solvent Interactions and Non-Adiabatic Couplings. Molecules 2023; 28:molecules28052286. [PMID: 36903532 PMCID: PMC10005559 DOI: 10.3390/molecules28052286] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2023] [Revised: 02/21/2023] [Accepted: 02/22/2023] [Indexed: 03/06/2023] Open
Abstract
In this contribution, we report a computational study of the vibrational Resonance Raman (vRR) spectra of cytosine in water, on the grounds of potential energy surfaces (PES) computed by time-dependent density functional theory (TD-DFT) and CAM-B3LYP and PBE0 functionals. Cytosine is interesting because it is characterized by several close-lying and coupled electronic states, challenging the approach commonly used to compute the vRR for systems where the excitation frequency is in quasi-resonance with a single state. We adopt two recently developed time-dependent approaches, based either on quantum dynamical numerical propagations of vibronic wavepackets on coupled PES or on analytical correlation functions for cases in which inter-state couplings were neglected. In this way, we compute the vRR spectra, considering the quasi-resonance with the eight lowest-energy excited states, disentangling the role of their inter-state couplings from the mere interference of their different contributions to the transition polarizability. We show that these effects are only moderate in the excitation energy range explored by experiments, where the spectral patterns can be rationalized from the simple analysis of displacements of the equilibrium positions along the different states. Conversely, at higher energies, interference and inter-state couplings play a major role, and the adoption of a fully non-adiabatic approach is strongly recommended. We also investigate the effect of specific solute-solvent interactions on the vRR spectra, by considering a cluster of cytosine, hydrogen-bonded by six water molecules, and embedded in a polarizable continuum. We show that their inclusion remarkably improves the agreement with the experiments, mainly altering the composition of the normal modes, in terms of internal valence coordinates. We also document cases, mostly for low-frequency modes, in which a cluster model is not sufficient, and more elaborate mixed quantum classical approaches, in explicit solvent models, need to be applied.
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Affiliation(s)
- Qiushuang Xu
- School of Physics Engineering, Qufu Normal University, Qufu 273165, China
- School of Physics and Optoelectronics Engineering, Ludong University, Yantai 264025, China
- Consiglio Nazionale delle Ricerche, Istituto di Chimica dei Composti Organo Metallici (ICCOM-CNR), SS di Pisa, Area della Ricerca, Via G. Moruzzi 1, I-56124 Pisa, Italy
| | - Yanli Liu
- School of Physics and Optoelectronics Engineering, Ludong University, Yantai 264025, China
| | - Meishan Wang
- School of Physics Engineering, Qufu Normal University, Qufu 273165, China
- School of Physics and Optoelectronics Engineering, Ludong University, Yantai 264025, China
| | - Javier Cerezo
- Consiglio Nazionale delle Ricerche, Istituto di Chimica dei Composti Organo Metallici (ICCOM-CNR), SS di Pisa, Area della Ricerca, Via G. Moruzzi 1, I-56124 Pisa, Italy
- Departamento de Química and Institute for Advanced Research in Chemical Sciences (IAdChem), Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - Roberto Improta
- Consiglio Nazionale delle Ricerche, Istituto di Biostrutture e Bioimmagini (IBB-CNR), Via De Amicis 95, I-80145 Napoli, Italy
- Correspondence: (R.I.); (F.S.)
| | - Fabrizio Santoro
- Consiglio Nazionale delle Ricerche, Istituto di Chimica dei Composti Organo Metallici (ICCOM-CNR), SS di Pisa, Area della Ricerca, Via G. Moruzzi 1, I-56124 Pisa, Italy
- Correspondence: (R.I.); (F.S.)
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7
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Cerezo J, García-Iriepa C, Santoro F, Navizet I, Prampolini G. Unraveling the contributions to the spectral shape of flexible dyes in solution: insights on the absorption spectrum of an oxyluciferin analogue. Phys Chem Chem Phys 2023; 25:5007-5020. [PMID: 36722876 DOI: 10.1039/d2cp05701h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
We present a computational investigation of the absorption spectrum in water of 5,5-spirocyclopropyl-oxyluciferin (5,5-CprOxyLH), an analogue of the emitter compound responsible for the bioluminescence in fireflies. Several factors participate in determining the 5,5-CprOxyLH's spectral shape: (i) the contribution of the four close-energy excited states, which show significant non-adiabatic couplings, (ii) the flexible molecular structure and (iii) the specific interactions established with the surrounding environment, which strongly couple the protic solvent dynamics with the dye's spectral response. To tackle the challenge to capture and dissect the role of all these effects we preliminarily investigate the role of non-adiabatic couplings with quantum dynamics simulations and a linear vibronic coupling model in the gas phase. Then, we account for both the molecular flexibility and solvent interactions by resorting to a mixed quantum classical protocol, named Adiabatic Molecular Dynamics generalized Vertical Gradient (Ad-MD|gVG), which is built on a method recently proposed by some of us. It is rooted in the partition between stiff degrees of freedom of the dye, accounted for at the vibronic level within the harmonic approximation, and flexible degrees of freedom of the solute (and of the solvent), described classically through a sampling based on Molecular Dynamics (MD). Ad-MD|gVG avoids spurious effects arising in the excited state Hessians due to non-adiabatic couplings, and can therefore be applied to account for the contributions of the first four excited states to the 5,5-CprOxyLH absorption spectrum. The final simulated spectrum is in very good agreement with the experiment, especially when the MD is driven by a refined quantum-mechanically derived force-field. More importantly, the origin of each separate contribution to the spectral shape is appropriately accounted for, paving the way to future applications of the method to more complex systems or alternative spectroscopies, as emission or circular dichroism.
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Affiliation(s)
- Javier Cerezo
- Departamento de Química and Institute for Advanced Research in Chemical Sciences (IAdChem), Universidad Autónoma de Madrid, 28049 Madrid, Spain. .,CNR - Consiglio Nazionale delle Ricerche, Istituto di Chimica dei Composti Organo Metallici (ICCOM-CNR), SS di Pisa, Area della Ricerca, via G. Moruzzi 1, I-56124 Pisa, Italy.
| | - Cristina García-Iriepa
- Universidad de Alcalá, Departamento de Química Analítica, Química Física e Ingeniería Química, Grupo de Reactividad y Estructura Molecular (RESMOL), 28806 Alcalá de Henares (Madrid), Spain. .,Universidad de Alcalá, Instituto de Investigación Química "Andrés M. del Río" (IQAR), 28806 Alcalá de Henares (Madrid), Spain
| | - Fabrizio Santoro
- CNR - Consiglio Nazionale delle Ricerche, Istituto di Chimica dei Composti Organo Metallici (ICCOM-CNR), SS di Pisa, Area della Ricerca, via G. Moruzzi 1, I-56124 Pisa, Italy.
| | - Isabelle Navizet
- Univ Gustave Eiffel, Univ Paris Est Creteil, CNRS, UMR 8208, MSME, F-77454 Marne-la-Vallée, France
| | - Giacomo Prampolini
- CNR - Consiglio Nazionale delle Ricerche, Istituto di Chimica dei Composti Organo Metallici (ICCOM-CNR), SS di Pisa, Area della Ricerca, via G. Moruzzi 1, I-56124 Pisa, Italy.
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8
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Cerezo J, Santoro F. FCclasses3: Vibrationally-resolved spectra simulated at the edge of the harmonic approximation. J Comput Chem 2023; 44:626-643. [PMID: 36380723 PMCID: PMC10100349 DOI: 10.1002/jcc.27027] [Citation(s) in RCA: 35] [Impact Index Per Article: 35.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2022] [Revised: 10/03/2022] [Accepted: 10/16/2022] [Indexed: 11/17/2022]
Abstract
We introduce FCclasses3, a code to carry out vibronic simulations of electronic spectra and nonradiative rates, based on the harmonic approximation. Key new features are: implementation of the full family of vertical and adiabatic harmonic models, vibrational analysis in curvilinear coordinates, extension to several electronic spectroscopies and implementation of time-dependent approaches. The use of curvilinear valence internal coordinates allows the adoption of quadratic model potential energy surfaces (PES) of the initial and final states expanded at arbitrary configurations. Moreover, the implementation of suitable projectors provides a robust framework for defining reduced-dimensionality models by sorting flexible coordinates out of the harmonic subset, so that they can then be treated at anharmonic level, or with mixed quantum classical approaches. A set of tools to facilitate input preparation and output analysis is also provided. We show the program at work in the simulation of different spectra (one and two-photon absorption, emission and resonance Raman) and internal conversion rate of a typical rigid molecule, anthracene. Then, we focus on absorption and emission spectra of a series of flexible polyphenyl molecules, highlighting the relevance of some of the newly implemented features. The code is freely available at http://www.iccom.cnr.it/en/fcclasses/.
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Affiliation(s)
- Javier Cerezo
- Departamento de Química and Institute for Advanced Research in Chemical Sciences (IAdChem)Universidad Autónoma de MadridMadridSpain
- Consiglio Nazionale delle RicercheIstituto di Chimica dei Composti Organo Metallici (ICCOM‐CNR)PisaItaly
| | - Fabrizio Santoro
- Consiglio Nazionale delle RicercheIstituto di Chimica dei Composti Organo Metallici (ICCOM‐CNR)PisaItaly
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9
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Aranda D, García-González F, Avila Ferrer FJ, López-Tocón I, Soto J, Otero JC. Computational Model for Electrochemical Surface-Enhanced Raman Scattering: Key Role of the Surface Charges and Synergy between Electromagnetic and Charge-Transfer Enhancement Mechanisms. J Chem Theory Comput 2022; 18:6802-6815. [PMID: 36222738 DOI: 10.1021/acs.jctc.2c00633] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We present a computational model for electrochemical surface-enhanced Raman scattering (EC-SERS). The surface excess of charge induced by the electrode potential (Vel) was introduced by applying an external electric field to a set of clusters [Agn]q with (n, q) of (19, ±1) or (20, 0) on which a molecule adsorbs. Using DFT/TD-DFT calculations, these metal-molecule complexes were classified by the adsorbate partial charge, and the main Vel-dependent properties were simultaneously studied with the aid of vibronic resonance Raman computations, namely, changes on the vibrational wavenumbers, relative intensities, and enhancement factors (EFs) for all SERS mechanisms: chemical or nonresonant, and resonance Raman with bright states of the adsorbate, charge-transfer (CT) states, and plasmon-like excitations on the metal cluster. We selected two molecules to test our model, pyridine, for which Vel has a remarkable effect, and 9,10-bis((E)-2-(pyridin-4-yl)vinyl)anthracene, which is almost insensitive to the applied bias. The results nicely reproduced most of the experimental observations, while the limitations of our approach were critically evaluated. We detected that accounting explicitly for the surface charges is key for EC-SERS models and that the highest calculated EFs, up to 107 to 108, are obtained by interstate coupling of bright local excitations of the metal cluster and CT states. These results highlight the importance of nonadiabatic effects in SERS and the capabilities of EC-SERS as a technique with potential to study excited-state coupling by tuning the CT and plasmon-like states by manipulating Vel.
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Affiliation(s)
- Daniel Aranda
- Instituto de Ciencia Molecular (ICMol), Universidad de Valencia, Catedrático J. Beltrán 2, 46980Paterna, Valencia, Spain.,Andalucía Tech, Facultad de Ciencias, Departamento de Química Física, Universidad de Málaga, 29071Málaga, Spain
| | - Francisco García-González
- Andalucía Tech, Facultad de Ciencias, Departamento de Química Física, Universidad de Málaga, 29071Málaga, Spain
| | - Francisco José Avila Ferrer
- Andalucía Tech, Facultad de Ciencias, Departamento de Química Física, Universidad de Málaga, 29071Málaga, Spain
| | - Isabel López-Tocón
- Andalucía Tech, Facultad de Ciencias, Departamento de Química Física, Universidad de Málaga, 29071Málaga, Spain
| | - Juan Soto
- Andalucía Tech, Facultad de Ciencias, Departamento de Química Física, Universidad de Málaga, 29071Málaga, Spain
| | - Juan Carlos Otero
- Andalucía Tech, Facultad de Ciencias, Departamento de Química Física, Universidad de Málaga, 29071Málaga, Spain
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10
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Xu Q, Aranda D, Yaghoubi Jouybari M, Liu Y, Wang M, Cerezo J, Improta R, Santoro F. Nonadiabatic Vibrational Resonance Raman Spectra from Quantum Dynamics Propagations with LVC Models. Application to Thymine. J Phys Chem A 2022; 126:7468-7479. [PMID: 36099554 PMCID: PMC9596142 DOI: 10.1021/acs.jpca.2c05271] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
![]()
We present a viable protocol to compute vibrational resonance
Raman
(vRR) spectra for systems with several close-lying and potentially
coupled electronic states. It is based on the parametrization of linear
vibronic coupling (LVC) models from time-dependent density functional
theory (TD-DFT) calculations and quantum dynamics propagations of
vibronic wavepackets with the multilayer version of the multiconfiguration
time-dependent Hartree (ML-MCTDH) method. Our approach is applied
to thymine considering seven coupled electronic states, comprising
the three lowest bright states, and all vibrational coordinates. Computed
vRR at different excitation wavelengths are in good agreement with
the available experimental data. Up to 250 nm the signal is dominated
by the lowest HOMO → LUMO transition, whereas at 233 nm, in
the valley between the two lowest energy absorption bands, the contributions
of all the three bright states, and their interferences and couplings,
are important. Inclusion of solvent (water) effects improves the agreement
with experiment, reproducing the coalescence of vibrational bands
due to CC and C=O stretchings. With our approach we disentangle
and assess the effect of interferences between the contribution of
different quasi-resonant states to the transition polarizability and
the effect of interstate couplings. Our findings strongly suggest
that in cases of close-lying and potentially coupled states a simple
inclusion of interference effects is not sufficient, and a fully nonadiabatic
computation should instead be performed. We also document that for
systems with strong couplings and quasi-degenerate states, the use
of HT perturbative approach, not designed for these cases, may lead
to large artifacts.
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Affiliation(s)
- Qiushuang Xu
- School of Physics and Optoelectronics Engineering, Ludong University, 264025 Yantai, Shandong, PR China.,School of Physics Engineering, Qufu Normal University, 2673100 Qufu, Shandong, PR China.,Consiglio Nazionale delle Ricerche, Istituto di Chimica dei Composti Organo Metallici (ICCOM-CNR), SS di Pisa, Area della Ricerca, via G. Moruzzi 1, I-56124 Pisa, Italy
| | - Daniel Aranda
- Instituto de Ciencia Molecular (ICMol)., Universidad de Valencia, c/Catedrático José Beltrán, 2, 46980 Paterna, Spain
| | - Martha Yaghoubi Jouybari
- Consiglio Nazionale delle Ricerche, Istituto di Chimica dei Composti Organo Metallici (ICCOM-CNR), SS di Pisa, Area della Ricerca, via G. Moruzzi 1, I-56124 Pisa, Italy
| | - Yanli Liu
- School of Physics and Optoelectronics Engineering, Ludong University, 264025 Yantai, Shandong, PR China
| | - Meishan Wang
- School of Physics and Optoelectronics Engineering, Ludong University, 264025 Yantai, Shandong, PR China
| | - Javier Cerezo
- Consiglio Nazionale delle Ricerche, Istituto di Chimica dei Composti Organo Metallici (ICCOM-CNR), SS di Pisa, Area della Ricerca, via G. Moruzzi 1, I-56124 Pisa, Italy.,Departamento de Química, Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - Roberto Improta
- Consiglio Nazionale delle Ricerche, Istituto di Biostrutture e Bioimmagini (IBB-CNR), Via De Amicis 95, I-80145 Napoli, Italy.,DTU Chemistry, Technical University of Denmark, Kemitorvet Bldg 207, DK-2800 Kongens Lyngby, Denmark
| | - Fabrizio Santoro
- Consiglio Nazionale delle Ricerche, Istituto di Chimica dei Composti Organo Metallici (ICCOM-CNR), SS di Pisa, Area della Ricerca, via G. Moruzzi 1, I-56124 Pisa, Italy
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Absorption and stationary fluorescent spectra of molecular sensors in solution: A computational study. COMPUT THEOR CHEM 2022. [DOI: 10.1016/j.comptc.2022.113596] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Tissier RC, Rigaud B, Thureau P, Huix-Rotllant M, Jaber M, Ferré N. Stressing the differences in alizarin and purpurin dyes through UV-visible light absorption and 1H-NMR spectroscopies. Phys Chem Chem Phys 2022; 24:19452-19462. [DOI: 10.1039/d2cp00520d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Three anthraquinone-based chromophores (9,10-anthraquinone, alizarin, purpurin) are compared from the point of view of their experimental and computed NMR and UV-visible light absorption spectra. Using an hybrid (explicit/implicit) solvent model,...
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