1
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Veys K, Bousquet MHE, Jacquemin D, Escudero D. Modeling the Fluorescence Quantum Yields of Aromatic Compounds: Benchmarking the Machinery to Compute Intersystem Crossing Rates. J Chem Theory Comput 2023; 19:9344-9357. [PMID: 38079612 DOI: 10.1021/acs.jctc.3c00931] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2023]
Abstract
The from-first-principles calculation of fluorescence quantum yields (FQYs) and lifetimes of organic dyes remains very challenging. In this article, we extensively test the machinery to calculate FQYs. Specifically, we perform an extensive analysis on the parameters influencing the intersystem crossing (ISC), internal conversion (IC), and fluorescence rate constants calculations. The impact of (i) the electronic structure (chosen exchange-correlation functional and spin-orbit Hamiltonian), (ii) the vibronic parameters (coordinate system, broadening function, and dipole expansion), and (iii) the excited-state kinetic models are systematically assessed for a series of seven rigid aromatic molecules. Our studies provide more insights into the choice of parameters and the expected accuracy for the computational protocols aiming to deliver FQY values. Some challenges are highlighted, such as, on the one hand, the difficulty to benchmark against the experimental nonradiative rate constants, for which the separation between the IC and ISC contributions is often not provided in the literature and, on the other hand, the need to go beyond the harmonic approximation for the calculation of the IC rates.
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Affiliation(s)
- Koen Veys
- Department of Chemistry, KU Leuven, B-3001 Leuven, Belgium
| | | | - Denis Jacquemin
- Nantes Université, CNRS, CEISAM UMR 6230, F-44000 Nantes, France
- Institut Universitaire de France (IUF), F-75005 Paris, France
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2
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do Casal MT, Veys K, Bousquet MHE, Escudero D, Jacquemin D. First-Principles Calculations of Excited-State Decay Rate Constants in Organic Fluorophores. J Phys Chem A 2023; 127:10033-10053. [PMID: 37988002 DOI: 10.1021/acs.jpca.3c06191] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2023]
Abstract
In this Perspective, we discuss recent advances made to evaluate from first-principles the excited-state decay rate constants of organic fluorophores, focusing on the so-called static strategy. In this strategy, one essentially takes advantage of Fermi's golden rule (FGR) to evaluate rate constants at key points of the potential energy surfaces, a procedure that can be refined in a variety of ways. In this way, the radiative rate constant can be straightforwardly obtained by integrating the fluorescence line shape, itself determined from vibronic calculations. Likewise, FGR allows for a consistent calculation of the internal conversion (related to the non-adiabatic couplings) in the weak-coupling regime and intersystem crossing rates, therefore giving access to estimates of the emission yields when no complex photophysical phenomenon is at play. Beyond outlining the underlying theories, we summarize here the results of benchmarks performed for various types of rates, highlighting that both the quality of the vibronic calculations and the accuracy of the relative energies are crucial to reaching semiquantitative estimates. Finally, we illustrate the successes and challenges in determining the fluorescence quantum yields using a series of organic fluorophores.
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Affiliation(s)
- Mariana T do Casal
- Department of Chemistry, Physical Chemistry and Quantum Chemistry Division, KU Leuven, 3001 Leuven, Belgium
| | - Koen Veys
- Department of Chemistry, Physical Chemistry and Quantum Chemistry Division, KU Leuven, 3001 Leuven, Belgium
| | | | - Daniel Escudero
- Department of Chemistry, Physical Chemistry and Quantum Chemistry Division, KU Leuven, 3001 Leuven, Belgium
| | - Denis Jacquemin
- Nantes Université, CNRS, CEISAM UMR 6230, F-44000 Nantes, France
- Institut Universitaire de France (IUF), FR-75005 Paris, France
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3
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Bousquet MHE, Papineau TV, Veys K, Escudero D, Jacquemin D. Extensive Analysis of the Parameters Influencing Radiative Rates Obtained through Vibronic Calculations. J Chem Theory Comput 2023; 19:5525-5547. [PMID: 37494031 DOI: 10.1021/acs.jctc.3c00191] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/27/2023]
Abstract
Defining a theoretical model systematically delivering accurate ab initio predictions of the fluorescence quantum yields of organic dyes is highly desirable for designing improved fluorophores in a systematic rather than trial-and-error way. To this end, the first required step is to obtain reliable radiative rates (kr), as low kr typically precludes effective emission. In the present contribution, using a series of 10 substituted phenyls with known experimental kr, we analyze the impact of the computational protocol on the kr determined through the thermal vibration correlation function (TVCF) approach on the basis of time-dependent density functional theory (TD-DFT) calculations of the energies, structures, and vibrational parameters. Both the electronic structure (selected exchange-correlation functional, application or not of the Tamm-Dancoff approximation) and the vibronic parameters (line-shape formalism, coordinate system, potential energy surface model, and dipole expansion) are tackled. Considering all possible combinations yields more than 3500 cases, allowing to extract statistically-relevant information regarding the impact of each computational parameter on the magnitude of the estimated kr. It turns out that the selected vibronic model can have a significant impact on the computed kr, especially the potential energy surface model. This effect is of the same order of magnitude as the difference noted between B3LYP and CAM-B3LYP estimates. For the treated compounds, all evaluated functionals do deliver reasonable trends, fitting the experimental values.
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Affiliation(s)
| | | | - Koen Veys
- Department of Chemistry, KU Leuven, B-3001 Leuven, Belgium
| | | | - Denis Jacquemin
- Nantes Université, CNRS, CEISAM UMR 6230, F-44000 Nantes, France
- Institut Universitaire de France (IUF), F-75005 Paris, France
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4
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Strianese M, Ferrara G, Vykhovanets V, Blal N, Guarnieri D, Landi A, Lamberti M, Peluso A, Pellecchia C. Sol-Gel Dipping Devices for H 2S Visualization. SENSORS (BASEL, SWITZERLAND) 2023; 23:s23042023. [PMID: 36850620 PMCID: PMC9965526 DOI: 10.3390/s23042023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/02/2023] [Revised: 02/08/2023] [Accepted: 02/08/2023] [Indexed: 05/14/2023]
Abstract
In this contribution we report the synthesis and full characterization, via a combination of different spectroscopies (e.g., 1H NMR, UV-vis, fluorescence, MALDI), of a new family of fluorescent zinc complexes with extended π-conjugated systems, with the final aim of setting up higher performance H2S sensing devices. Immobilization of the systems into a polymeric matrix for use in a solid-state portable device was also explored. The results provided proof-of-principle that the title complexes could be successfully implemented in a fast, simple and cost-effective H2S sensing device.
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5
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Strianese M, D'Auria GJ, Lamberti M, Landi A, Peluso A, Varriale A, D'Auria S, Pellecchia C. Salen, salan and salalen zinc(II) complexes in the interaction with HS -: time-resolved fluorescence applications. Dalton Trans 2023; 52:1357-1365. [PMID: 36632781 DOI: 10.1039/d2dt03730k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
In the current work we investigate the route of interaction of a newly synthesized family of zinc complexes with HS- by a plethora of different spectroscopic techniques. A computational analysis on the time dependent density functional theory (TD-DFT) level explored the overall fluorescence properties of the title complexes and their different fluorescence responses to HS-. Time-resolved fluorescence experiments were also performed and highlight the great potential of the current systems to be implemented as HS- fluorescent sensors.
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Affiliation(s)
- Maria Strianese
- Dipartimento di Chimica e Biologia "Adolfo Zambelli", Università degli Studi di Salerno, Via Giovanni Paolo II, 132, 84084, Fisciano (SA), Italy.
| | - Gerard Joseph D'Auria
- Dipartimento di Chimica e Biologia "Adolfo Zambelli", Università degli Studi di Salerno, Via Giovanni Paolo II, 132, 84084, Fisciano (SA), Italy.
| | - Marina Lamberti
- Dipartimento di Chimica e Biologia "Adolfo Zambelli", Università degli Studi di Salerno, Via Giovanni Paolo II, 132, 84084, Fisciano (SA), Italy.
| | - Alessandro Landi
- Dipartimento di Chimica e Biologia "Adolfo Zambelli", Università degli Studi di Salerno, Via Giovanni Paolo II, 132, 84084, Fisciano (SA), Italy.
| | - Andrea Peluso
- Dipartimento di Chimica e Biologia "Adolfo Zambelli", Università degli Studi di Salerno, Via Giovanni Paolo II, 132, 84084, Fisciano (SA), Italy.
| | - Antonio Varriale
- Institute of Food Science, CNR Italy, 83100 Avellino, Italy.,URT-ISA, CNR at Department of Biology, University of Naples Federico II, 80126 Napoli, Italy
| | - Sabato D'Auria
- Department of Biology, Agriculture, and Food Sciences, National Research Council of Italy (CNR-DISBA), Piazzale Aldo Moro 7, 00185 Rome, Italy
| | - Claudio Pellecchia
- Dipartimento di Chimica e Biologia "Adolfo Zambelli", Università degli Studi di Salerno, Via Giovanni Paolo II, 132, 84084, Fisciano (SA), Italy.
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6
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Electron Transfer Rates in Solution: Toward a Predictive First Principle Approach. CHEMISTRY 2023. [DOI: 10.3390/chemistry5010008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
Using a very recently proposed theoretical model, electron transfer rates in solution are calculated from first principles for different donor-acceptor pairs in tetrahydrofuran. We show that this approach, which integrates tunneling effects into a classical treatment of solvent motion, is able to provide reliable rate constants and their temperature dependence, even in the case of highly exergonic reactions, where Marcus’ theory usually fails.
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7
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Cainelli M, Borrelli R, Tanimura Y. Effect of mixed Frenkel and charge transfer states in time-gated fluorescence spectra of perylene bisimides H-aggregates: Hierarchical equations of motion approach. J Chem Phys 2022; 157:084103. [DOI: 10.1063/5.0102000] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We theoretically investigated the effect of mixed Frenkel (F) and charge transfer (CT) states on the spectral properties of perylene bisimide (PBI) derivatives, focusing on the role of strong electron-phonon interactions. The model consists of a four-level system described by the Holstein Hamiltonian coupled to independent local heat-baths on each site, described by Brownian spectral distribution functions. We employ the reduced hierarchical equations of motion (HEOM) approach to calculate the time evolution of the system and compare it to the pure F exciton cases. We compute the absorption and time-gated fluorescence (TGF) spectra for different exciton transfer integrals and F-CT band gap conditions. The coherence length of excitons ($N_{coh}$) is evaluated employing two different definitions. We observe the presence of an excited hot state peak whose intensity is associated with the delocalization of the excited species and ultrafast dynamics that are solely dependent on the frequency of the local bath. The results indicate that the inclusion of CT states promotes localization of the excitons which is manifested in a decrease in the intensity of the hot state peak and the 0--1 peak, and an increase in the intensity of the 0--0 emission peak in TGF spectrum, leading to a decrease of $N_{coh}$.
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Affiliation(s)
| | - Raffaele Borrelli
- Department of Agricoltural Science, Università degli Studi di Torino, Italy
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8
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Shen K, Sun K, Zhao Y. Simulation of Emission Spectra of Transition Metal Dichalcogenide Monolayers with the Multimode Brownian Oscillator Model. J Phys Chem A 2022; 126:2706-2715. [PMID: 35467864 DOI: 10.1021/acs.jpca.2c01522] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The multimode Brownian oscillator model is employed to simulate the emission spectra of transition metal dichalcogenide (TMD) monolayers. Good agreement is obtained between measured and simulated photoluminescence spectra of WSe2, WS2, MoSe2, and MoS2 at various temperatures. The Huang-Rhys factor extracted from the model can be associated with that from the modified semiempirical Varshni equation at high temperatures. Individual mechanisms leading to the unique temperature-dependent emission spectra of those TMDs are validated by the multimode Brownian oscillator (MBO) fitting, while it is, in turn, confirmed that the MBO analysis is an effective method for studying the optical properties of TMD monolayers. Parameters extracted from the MBO fitting can be used to explore exciton-photon-phonon dynamics of TMDs in a more comprehensive model.
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Affiliation(s)
- Kaijun Shen
- School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798, Singapore
| | - Kewei Sun
- School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798, Singapore.,School of Science, Hangzhou Dianzi University, Hangzhou 310018, China
| | - Yang Zhao
- School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798, Singapore
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9
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Paper-Strip-Based Sensors for H 2S Detection: A Proof-of-Principle Study. SENSORS 2022; 22:s22093173. [PMID: 35590862 PMCID: PMC9103406 DOI: 10.3390/s22093173] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/28/2022] [Revised: 04/17/2022] [Accepted: 04/19/2022] [Indexed: 12/10/2022]
Abstract
In this work, the authors explored the interaction of a suite of fluorescent zinc complexes with H2S. The authors provide evidence that HS− binds the zinc center of all the complexes under investigation, allowing them to possibly function as sensors by a ‘coordinative-based’ approach. Naked-eye color changes occur when treating the systems with HS−, so the fluorescence responses are modulated by the presence of HS−, which has been related to a change in the energy level and coupling of excited states through a computational study. The results show the potential of the systems to function as HS−/H2S colorimetric and fluorescent sensors. Paper-strip-based sensing experiments foresee the potential of using this family of complexes as chemosensors of HS− in more complex biological fluids.
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10
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Chen WK, Cui G, Liu XY. Solvent effects on excited-state relaxation dynamics of paddle-wheel BODIPY-Hexaoxatriphenylene conjugates: Insights from non-adiabatic dynamics simulations. CHINESE J CHEM PHYS 2022. [DOI: 10.1063/1674-0068/cjcp2110214] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
Understanding the excited state dynamics of donor-acceptor (D-A) complexes is of fundamental importance both experimentally and theoretically. Herein, we have first explored the photoinduced dynamics of a recently synthesized paddle-wheel BODIPY-hexaoxatriphenylene (BODIPY is the abbreviation for BF2-chelated dipyrromethenes) conjugates D-A complexes with the combination of both electronic structure calculations and non-adiabatic dynamics simulations. On the basis of computational results, we concluded that the BODIPY-hexaoxatriphenylene (BH) conjugates will be promoted to the local excited (LE) states of the BODIPY fragments upon excitation, which is followed by the ultrafast exciton transfer from LE state to charge transfer (CT). Instead of the photoinduced electron transfer process proposed in previous experimental work, such a exciton transfer process is accompanied with the photoinduced hole transfer from BODIPY to hexaoxatriphenylene. Additionally, solvent effects are found to play an important role in the photoinduced dynamics. Specifically, the hole transfer dynamics is accelerated by the acetonitrile solvent, which can be ascribed to significant influences of the solvents on the charge transfer states, i.e. the energy gaps between LE and CT excitons are reduced greatly and the non-adiabatic couplings are increased in the meantime. Our present work not only provides valuable insights into the underlying photoinduced mechanism of BH, but also can be helpful for the future design of novel donor-acceptor conjugates with better optoelectronic performance.
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Affiliation(s)
- Wen-Kai Chen
- Key Laboratory of Theoretical and Computational Photochemistry, Ministry of Education, College of Chemistry, Beijing Normal University, Beijing 100875, China
| | - Ganglong Cui
- Key Laboratory of Theoretical and Computational Photochemistry, Ministry of Education, College of Chemistry, Beijing Normal University, Beijing 100875, China
| | - Xiang-Yang Liu
- College of Chemistry and Material Science, Sichuan Normal University, Chengdu 610068, China
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11
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Parisi E, Landi A, Fusco S, Manfredi C, Peluso A, Wahler S, Klapötke TM, Centore R. High-Energy-Density Materials: An Amphoteric N-Rich Bis(triazole) and Salts of Its Cationic and Anionic Species. Inorg Chem 2021; 60:16213-16222. [PMID: 34636552 PMCID: PMC8564754 DOI: 10.1021/acs.inorgchem.1c02002] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
![]()
The synthesis and
characterization of the N-rich bis(triazole)
compound 1H,4′H-[3,3′-bis(1,2,4-triazole)]-4′,5,5′-triamine
(C4H7N9) with a N content of 69.6%
by weight is reported. The compound exhibits a rich acid–base
behavior because it can accept up to two protons, forming a monocation
and a dication, and can lose one proton, forming an anion. Measurement
of the acid constants has shown that there exist well-defined pH intervals
in which each of the four species is predominant in solution, opening
the way to their isolation and characterization by single-crystal
X-ray analysis as salts with different counterions. Some energetic
salts of the monocation or dication containing oxidizing inorganic
counterions (dinitramide, perchlorate, and nitrate) were also prepared
and characterized in the solid state for their sensitivity. In particular,
the neutral compound shows a very remarkable thermal stability in
air, with Td = 347 °C, and is insensitive
to impact and friction. Salts of the dication with energetic counterions,
in particular perchlorate and nitrate, show increased sensitivities
and reduced thermal stability. The salt of the monocation with dinitramide
as the counterion outperforms other dinitramide salts reported in
the literature because of its higher thermal stability (Td = 230 °C in air) and friction insensitiveness. An energetic, N-rich compound that, depending
on the pH,
can exist as neutral, singly protonated, doubly protonated, and deprotonated
species is shown.
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Affiliation(s)
- Emmanuele Parisi
- Department of Chemical Sciences, University of Naples Federico II, Via Cinthia, I-80126 Naples, Italy
| | - Alessandro Landi
- Department of Chemistry and Biology, University of Salerno, Via Giovanni Paolo II, 132, I-84084 Fisciano, Salerno, Italy
| | - Sandra Fusco
- Department of Chemical Sciences, University of Naples Federico II, Via Cinthia, I-80126 Naples, Italy
| | - Carla Manfredi
- Department of Chemical Sciences, University of Naples Federico II, Via Cinthia, I-80126 Naples, Italy
| | - Andrea Peluso
- Department of Chemistry and Biology, University of Salerno, Via Giovanni Paolo II, 132, I-84084 Fisciano, Salerno, Italy
| | - Sabrina Wahler
- Department of Chemistry, Energetic Materials Research, Ludwig-Maximilian University, Butenandtstrasse 5-13, D-81377 Münich, Germany
| | - Thomas M Klapötke
- Department of Chemistry, Energetic Materials Research, Ludwig-Maximilian University, Butenandtstrasse 5-13, D-81377 Münich, Germany
| | - Roberto Centore
- Department of Chemical Sciences, University of Naples Federico II, Via Cinthia, I-80126 Naples, Italy
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12
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Shishkina SV, Dyakonenko VV, Ishchenko AA, Kulinich AV. Ideal polymethine state of merocyanines in the crystal. Struct Chem 2021. [DOI: 10.1007/s11224-021-01834-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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13
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Tirri B, Mazzone G, Ottochian A, Gomar J, Raucci U, Adamo C, Ciofini I. A combined Monte Carlo/DFT approach to simulate UV-vis spectra of molecules and aggregates: Merocyanine dyes as a case study. J Comput Chem 2021; 42:1054-1063. [PMID: 33797766 DOI: 10.1002/jcc.26505] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2020] [Revised: 01/07/2021] [Accepted: 01/07/2021] [Indexed: 11/09/2022]
Abstract
The combination of a Monte Carlo (MC) sampling of the configurational space with time dependent-density functional theory (TD-DFT) to estimate vertical excitations energies has been applied to compute the absorption spectra of a family of merocyanine dyes in both their monomeric and dimeric forms. These results have been compared to those obtained using a static DFT/TD-DFT approach as well as to the available experimental spectra. Though suffering of the limitations related to the use of DFT and TD-DFT for this type of systems, our data clearly show that the classical MC sampling provides a suitable alternative to classical molecular dynamics to explore the structural flexibility of these donor-acceptor (D-π-A) chromophores enabling a realistic description of the potential energy surface of both their monomers and aggregates (here dimers) and thus of their spectra. Overall, the combination of MC sampling with quantum mechanics (TD-DFT) calculations, carried out in implicit dioxane solvent on random snapshots, provides a workable compromise to solve the combined challenge of accuracy and time-consuming problem not only for merocyanines momers, but also for their dimers, up to now less investigated. Indeed, the simulated absorption spectra fairly agree with the experimental ones, suggesting the general reliability of the method.
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Affiliation(s)
- Bernardino Tirri
- Chimie ParisTech, PSL University, CNRS, Institute of Chemistry for Life and Health Sciences, Theoretical Chemistry and Modelling, Paris, France
| | - Gloria Mazzone
- Chimie ParisTech, PSL University, CNRS, Institute of Chemistry for Life and Health Sciences, Theoretical Chemistry and Modelling, Paris, France
| | - Alistar Ottochian
- Chimie ParisTech, PSL University, CNRS, Institute of Chemistry for Life and Health Sciences, Theoretical Chemistry and Modelling, Paris, France
| | - Jerôme Gomar
- L'Oréal, Research and Innovation, Aulnay-sous-Bois, France
| | - Umberto Raucci
- Chimie ParisTech, PSL University, CNRS, Institute of Chemistry for Life and Health Sciences, Theoretical Chemistry and Modelling, Paris, France
| | - Carlo Adamo
- Chimie ParisTech, PSL University, CNRS, Institute of Chemistry for Life and Health Sciences, Theoretical Chemistry and Modelling, Paris, France.,Institut Universitaire de France, Paris, France
| | - Ilaria Ciofini
- Chimie ParisTech, PSL University, CNRS, Institute of Chemistry for Life and Health Sciences, Theoretical Chemistry and Modelling, Paris, France
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14
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Velardo A, Landi A, Borrelli R, Peluso A. Reliable Predictions of Benzophenone Singlet-Triplet Transition Rates: A Second-Order Cumulant Approach. J Phys Chem A 2021; 125:43-49. [PMID: 33369419 DOI: 10.1021/acs.jpca.0c07848] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Fermi golden rule and second-order cumulant expansion of the time-dependent density matrix have been used to compute from first principles the rate of intersystem crossing in benzophenone, using minimum-energy geometries and normal modes of vibrations computed at the TDDFT/CAM-B3LYP level. Both approaches yield reliable values of the S1 decay rate, the latter being almost in quantitative agreement with the results of time-dependent spectroscopic measurements (0.154 ps-1 observed vs 0.25 ps-1 predicted). The Fermi golden rule slightly overestimates the decay rate of S1 state (kd = 0.45 ps-1) but provides better insights into the chemico-physical parameters, which govern the transition from a thermally equilibrated population of S1, showing that the indirect mechanism is much faster than the direct one because of the vanishingly small Franck-Condon weighted density of states at ΔE of transition.
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Affiliation(s)
- Amalia Velardo
- Department of Chemistry, University of Torino, Via P. Giuria, 7, 10125 Torino, Italy.,Dipartimento di Chimica e Biologia Adolfo Zambelli, Università di Salerno, Via Giovanni Paolo II, I-84084 Fisciano, SA, Italy
| | - Alessandro Landi
- Dipartimento di Chimica e Biologia Adolfo Zambelli, Università di Salerno, Via Giovanni Paolo II, I-84084 Fisciano, SA, Italy
| | - Raffaele Borrelli
- Department of Agricultural, Forestry and Food Science, University of Torino, I-10195 Grugliasco, Italy
| | - Andrea Peluso
- Dipartimento di Chimica e Biologia Adolfo Zambelli, Università di Salerno, Via Giovanni Paolo II, I-84084 Fisciano, SA, Italy
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15
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Strianese M, Guarnieri D, Lamberti M, Landi A, Peluso A, Pellecchia C. Fluorescent salen-type Zn(II) Complexes As Probes for Detecting Hydrogen Sulfide and Its Anion: Bioimaging Applications. Inorg Chem 2020; 59:15977-15986. [PMID: 33047602 PMCID: PMC8015222 DOI: 10.1021/acs.inorgchem.0c02499] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2020] [Indexed: 12/11/2022]
Abstract
In this work, we investigate the mode of interaction of a family of fluorescent zinc complexes with HS- and H2S. Different experiments, performed by diverse spectroscopic techniques, provide evidence that HS- binds the zinc center of all the complexes under investigation. Treatment with neutral H2S exhibits a markedly different reactivity which indicates selectivity for HS- over H2S of the systems under investigation. Striking color changes, visible to the naked eye, occur when treating the systems with HS- or by an H2S flow. Accordingly, also the fluorescence is modulated by the presence of HS-, with the possible formation of multiple adducts. The results highlight the potential of the devised systems to be implemented as HS-/H2S colorimetric and fluorescent sensors. Bioimaging experiments indicate the potential of using this class of compounds as probes for the detection of H2S in living cells.
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Affiliation(s)
- Maria Strianese
- Dipartimento di Chimica e
Biologia “Adolfo Zambelli”, Università degli Studi di Salerno, Via Giovanni Paolo II, 132, 84084 Fisciano, Salerno, Italy
| | - Daniela Guarnieri
- Dipartimento di Chimica e
Biologia “Adolfo Zambelli”, Università degli Studi di Salerno, Via Giovanni Paolo II, 132, 84084 Fisciano, Salerno, Italy
| | - Marina Lamberti
- Dipartimento di Chimica e
Biologia “Adolfo Zambelli”, Università degli Studi di Salerno, Via Giovanni Paolo II, 132, 84084 Fisciano, Salerno, Italy
| | - Alessandro Landi
- Dipartimento di Chimica e
Biologia “Adolfo Zambelli”, Università degli Studi di Salerno, Via Giovanni Paolo II, 132, 84084 Fisciano, Salerno, Italy
| | - Andrea Peluso
- Dipartimento di Chimica e
Biologia “Adolfo Zambelli”, Università degli Studi di Salerno, Via Giovanni Paolo II, 132, 84084 Fisciano, Salerno, Italy
| | - Claudio Pellecchia
- Dipartimento di Chimica e
Biologia “Adolfo Zambelli”, Università degli Studi di Salerno, Via Giovanni Paolo II, 132, 84084 Fisciano, Salerno, Italy
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16
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Capobianco A, Di Donato M, Caruso T, Centore R, Lapini A, Manfredi C, Velardo A, Volino S, Peluso A. Phototautomerism of triazolo-triazole scaffold. J Mol Struct 2020. [DOI: 10.1016/j.molstruc.2019.127368] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Iuliano V, Talotta C, Gaeta C, Soriente A, De Rosa M, Geremia S, Hickey N, Mennucci B, Neri P. Negative Solvatochromism in a N-Linked p-Pyridiniumcalix[4]arene Derivative. Org Lett 2019; 21:2704-2707. [DOI: 10.1021/acs.orglett.9b00683] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Veronica Iuliano
- Dipartimento di Chimica e Biologia “A. Zambelli”, Università di Salerno, Via Giovanni Paolo II 132, I-84084 Fisciano, Salerno, Italy
| | - Carmen Talotta
- Dipartimento di Chimica e Biologia “A. Zambelli”, Università di Salerno, Via Giovanni Paolo II 132, I-84084 Fisciano, Salerno, Italy
| | - Carmine Gaeta
- Dipartimento di Chimica e Biologia “A. Zambelli”, Università di Salerno, Via Giovanni Paolo II 132, I-84084 Fisciano, Salerno, Italy
| | - Annunziata Soriente
- Dipartimento di Chimica e Biologia “A. Zambelli”, Università di Salerno, Via Giovanni Paolo II 132, I-84084 Fisciano, Salerno, Italy
| | - Margherita De Rosa
- Dipartimento di Chimica e Biologia “A. Zambelli”, Università di Salerno, Via Giovanni Paolo II 132, I-84084 Fisciano, Salerno, Italy
| | - Silvano Geremia
- Centro di Eccellenza in Biocristallografia, Dipartimento di Scienze Chimiche e Farmaceutiche, Università di Trieste, via L. Giorgieri 1, I-34127 Trieste, Italy
| | - Neal Hickey
- Centro di Eccellenza in Biocristallografia, Dipartimento di Scienze Chimiche e Farmaceutiche, Università di Trieste, via L. Giorgieri 1, I-34127 Trieste, Italy
| | - Benedetta Mennucci
- Dipartimento di Chimica Industriale, Università di Pisa, Via G. Moruzzi 13, I-56124 Pisa, Italy
| | - Placido Neri
- Dipartimento di Chimica e Biologia “A. Zambelli”, Università di Salerno, Via Giovanni Paolo II 132, I-84084 Fisciano, Salerno, Italy
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Aydinoglu S, Pasti A, Biver T, Mennucci B. Auramine O interaction with DNA: a combined spectroscopic and TD-DFT analysis. Phys Chem Chem Phys 2019; 21:20606-20612. [DOI: 10.1039/c9cp03071a] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
AuO fluorescent molecular rotor intercalation into DNA: calculations and experiments uncover binding details as absorbance/fluorescence features, energies involved and geometries.
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Affiliation(s)
- Sabriye Aydinoglu
- Department of Analytical Chemistry
- Faculty of Pharmacy – Cukurova University
- 01250 Sarıçam/Adana
- Turkey
| | - Andrea Pasti
- Department of Chemistry and Industrial Chemistry
- University of Pisa
- 56124 Pisa
- Italy
| | - Tarita Biver
- Department of Analytical Chemistry
- Faculty of Pharmacy – Cukurova University
- 01250 Sarıçam/Adana
- Turkey
- Department of Pharmacy
| | - Benedetta Mennucci
- Department of Chemistry and Industrial Chemistry
- University of Pisa
- 56124 Pisa
- Italy
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Theoretical and experimental spectroscopic investigation of new polymethine donor-π-acceptor cyanine dyes: Synthesis, photophysical, and TDDFT studies. J Mol Struct 2018. [DOI: 10.1016/j.molstruc.2018.07.021] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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20
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Capobianco A, Velardo A, Peluso A. Single-Stranded DNA Oligonucleotides Retain Rise Coordinates Characteristic of Double Helices. J Phys Chem B 2018; 122:7978-7989. [PMID: 30070843 DOI: 10.1021/acs.jpcb.8b04542] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The structures of single-stranded DNA oligonucleotides from dimeric to hexameric sequences have been thoroughly investigated. Computations performed at the density functional level of theory including dispersion forces and solvation show that single-stranded helices adopt conformations very close to crystallographic B-DNA, with rise coordinates amounting up to 3.3 Å. Previous results, suggesting that single strands should be shorter than double helices, largely originated from the incompleteness of the adopted basis set. Although sensible deviations with respect to standard B-DNA are predicted, computations indicate that sequences rich in stacked adenines are the most ordered ones, favoring the B-DNA pattern and inducing regular arrangements also on flanking nucleobases. Several structural properties of double helices rich in adenine are indeed already reflected by the corresponding single strands.
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Affiliation(s)
- Amedeo Capobianco
- Dipartimento di Chimica e Biologia "A. Zambelli" , Università di Salerno , Via Giovanni Paolo II , I-84084 Fisciano (SA) , Italy
| | - Amalia Velardo
- Dipartimento di Chimica e Biologia "A. Zambelli" , Università di Salerno , Via Giovanni Paolo II , I-84084 Fisciano (SA) , Italy
| | - Andrea Peluso
- Dipartimento di Chimica e Biologia "A. Zambelli" , Università di Salerno , Via Giovanni Paolo II , I-84084 Fisciano (SA) , Italy
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Mustroph H, Towns A. Fine Structure in Electronic Spectra of Cyanine Dyes: Are Sub-Bands Largely Determined by a Dominant Vibration or a Collection of Singly Excited Vibrations? Chemphyschem 2018; 19:1016-1023. [PMID: 29266605 PMCID: PMC5969267 DOI: 10.1002/cphc.201701300] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2017] [Indexed: 02/04/2023]
Abstract
This work critically examines attempts to model the fine structure apparent in electronic spectra of cyanine dyes and their analogues. Numerous computational studies reported over the past decade attribute the origin of sub‐bands and their relative intensities to vibronic transitions in which the relevant electronic transition is coupled, irrespective of symmetry, with a collection of vibrations. It is contended that this type of approach is not supported by experimental evidence. An argument is reiterated for a more appropriate model that adheres closely to fundamental principles and fits the data. It stipulates that essentially just one symmetric vibration, carbon–carbon bond stretching of the cyanine polymethine chain, dominates the coupling and is responsible for the observed fine structure. Furthermore, it is pointed out that the intensities of the sub‐bands are readily explained by means of the Franck–Condon principle.
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Affiliation(s)
- Heinz Mustroph
- FEW Chemicals GmbH, Technikumstraße 1, 06756, Bitterfeld-Wolfen, Germany
| | - Andrew Towns
- Lambson Ltd., Clifford House, York Road,Wetherby, West Yorkshire, LS22 7NS, England
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Landi A, Borrelli R, Capobianco A, Velardo A, Peluso A. Hole Hopping Rates in Organic Semiconductors: A Second-Order Cumulant Approach. J Chem Theory Comput 2018; 14:1594-1601. [DOI: 10.1021/acs.jctc.7b00858] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Alessandro Landi
- Dipartimento di Chimica e Biologia “A. Zambelli”, Università di Salerno, Via Giovanni Paolo II, I-84084 Fisciano (SA), Italy
| | - Raffaele Borrelli
- Department of Agricultural, Forestry and Food Science, University of Torino, I-10195 Grugliasco, Italy
| | - Amedeo Capobianco
- Dipartimento di Chimica e Biologia “A. Zambelli”, Università di Salerno, Via Giovanni Paolo II, I-84084 Fisciano (SA), Italy
| | - Amalia Velardo
- Dipartimento di Chimica e Biologia “A. Zambelli”, Università di Salerno, Via Giovanni Paolo II, I-84084 Fisciano (SA), Italy
| | - Andrea Peluso
- Dipartimento di Chimica e Biologia “A. Zambelli”, Università di Salerno, Via Giovanni Paolo II, I-84084 Fisciano (SA), Italy
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Della Sala P, Capobianco A, Caruso T, Talotta C, De Rosa M, Neri P, Peluso A, Gaeta C. An Anthracene-Incorporated [8]Cycloparaphenylene Derivative as an Emitter in Photon Upconversion. J Org Chem 2018; 83:220-227. [PMID: 29231727 DOI: 10.1021/acs.joc.7b02590] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The anthracene-incorporated [8]cycloparaphenylene 2 has been synthesized and its optoelectronic properties studied by UV-vis spectroscopy, cyclic voltammetry, and DFT calculations. NMR and computational studies indicate that the new cycloparaphenylene derivative possesses a Cs point group symmetry. The new CPP 2 exhibits peculiar optoelectronic properties: (i) fluorescence emission is blue-shifted with respect to [8]cycloparaphenylene 1, and its quantum yield is higher; (ii) in the presence of an octaethylporphyrin Pd complex, as sensitizer, it undergoes a visible light upconversion. This is the first case in which a cycloparaphenylene derivative is involved as an emitter in low power light frequency conversion.
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Affiliation(s)
- Paolo Della Sala
- Dipartimento di Chimica e Biologia "A. Zambelli", Università di Salerno , Via Giovanni Paolo II 132, I-84084 Fisciano (Salerno), Italy
| | - Amedeo Capobianco
- Dipartimento di Chimica e Biologia "A. Zambelli", Università di Salerno , Via Giovanni Paolo II 132, I-84084 Fisciano (Salerno), Italy
| | - Tonino Caruso
- Dipartimento di Chimica e Biologia "A. Zambelli", Università di Salerno , Via Giovanni Paolo II 132, I-84084 Fisciano (Salerno), Italy
| | - Carmen Talotta
- Dipartimento di Chimica e Biologia "A. Zambelli", Università di Salerno , Via Giovanni Paolo II 132, I-84084 Fisciano (Salerno), Italy
| | - Margherita De Rosa
- Dipartimento di Chimica e Biologia "A. Zambelli", Università di Salerno , Via Giovanni Paolo II 132, I-84084 Fisciano (Salerno), Italy
| | - Placido Neri
- Dipartimento di Chimica e Biologia "A. Zambelli", Università di Salerno , Via Giovanni Paolo II 132, I-84084 Fisciano (Salerno), Italy
| | - Andrea Peluso
- Dipartimento di Chimica e Biologia "A. Zambelli", Università di Salerno , Via Giovanni Paolo II 132, I-84084 Fisciano (Salerno), Italy
| | - Carmine Gaeta
- Dipartimento di Chimica e Biologia "A. Zambelli", Università di Salerno , Via Giovanni Paolo II 132, I-84084 Fisciano (Salerno), Italy
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