1
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Zhao L, Zhu H, Duo YY, Pang DW, Wang ZG, Liu SL. Near-Infrared II Hemicyanine Dye with Large Stokes Shift Designed by TICT Regulation for Boosting Imaging-Guided Photothermal Therapy. Adv Healthc Mater 2023; 12:e2301584. [PMID: 37660278 DOI: 10.1002/adhm.202301584] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2023] [Revised: 08/31/2023] [Indexed: 09/04/2023]
Abstract
The serious threat that cancer poses to human health highlights the significance of early detection and effective treatment. The integration of fluorescence diagnosis and photothermal therapy in NIR-II has gained attention due to its high sensitivity, fast response, and noninvasiveness. Fluorescence, produced by the radiative relaxation process of electrons in a molecule, and photothermal, generated by the nonradiative relaxation process of electrons in a molecule, are competing photophysical processes. Hence, it is a challenge for the molecule to balance between the properties of fluorescence and photothermal. In this study, a NIR-II hemicyanine with TICT character is designed to obtain molecules with both better fluorescence and photothermal properties, utilizing positively charged pyridine salt and triphenylamine as electron acceptor and donor, respectively, and oxole as the conjugated π-bridge. HCY-995, one of the synthesized compounds, has a quantum yield of 0.09%, photothermal conversion efficiency of 54.90%, and a significant Stoke shift of 232 nm, which makes it appropriate for the integration of photothermal therapy and high-resolution imaging. This study provides new insights into the development of NIR-II molecules with fluorescent and photothermal integrated properties.
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Affiliation(s)
- Liang Zhao
- State Key Laboratory of Medicinal Chemical Biology, Tianjin Key Laboratory of Biosensing and Molecular Recognition, Research Center for Analytical Sciences, College of Chemistry, and School of Medicine, Nankai University, Tianjin, 300071, P. R. China
| | - Han Zhu
- State Key Laboratory of Medicinal Chemical Biology, Tianjin Key Laboratory of Biosensing and Molecular Recognition, Research Center for Analytical Sciences, College of Chemistry, and School of Medicine, Nankai University, Tianjin, 300071, P. R. China
| | - You-Yang Duo
- State Key Laboratory of Medicinal Chemical Biology, Tianjin Key Laboratory of Biosensing and Molecular Recognition, Research Center for Analytical Sciences, College of Chemistry, and School of Medicine, Nankai University, Tianjin, 300071, P. R. China
| | - Dai-Wen Pang
- State Key Laboratory of Medicinal Chemical Biology, Tianjin Key Laboratory of Biosensing and Molecular Recognition, Research Center for Analytical Sciences, College of Chemistry, and School of Medicine, Nankai University, Tianjin, 300071, P. R. China
| | - Zhi-Gang Wang
- State Key Laboratory of Medicinal Chemical Biology, Tianjin Key Laboratory of Biosensing and Molecular Recognition, Research Center for Analytical Sciences, College of Chemistry, and School of Medicine, Nankai University, Tianjin, 300071, P. R. China
| | - Shu-Lin Liu
- State Key Laboratory of Medicinal Chemical Biology, Tianjin Key Laboratory of Biosensing and Molecular Recognition, Research Center for Analytical Sciences, College of Chemistry, and School of Medicine, Nankai University, Tianjin, 300071, P. R. China
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2
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Maroń AM, Cannelli O, Socie EC, Lodowski P, Machura B. Push-Pull Effect of Terpyridine Substituted by Triphenylamine Motive—Impact of Viscosity, Polarity and Protonation on Molecular Optical Properties. Molecules 2022; 27:molecules27207071. [PMID: 36296665 PMCID: PMC9606908 DOI: 10.3390/molecules27207071] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2022] [Revised: 10/13/2022] [Accepted: 10/14/2022] [Indexed: 12/02/2022] Open
Abstract
The introduction of an electron-donating triphenylamine motive into a 2,2′,6′,2′′-terpyridine (terpy) moiety, a cornerstone molecular unit in coordination chemistry, opens new ways for a rational design of photophysical properties of organic and inorganic compounds. A push-pull compound, 4′-(4-(di(4-tert-butylphenyl)amine)phenyl)-2,2′,6′,2′′-terpyridine (tBuTPAterpy), was thoroughly investigated with the use of steady-state and time-resolved spectroscopies and Density Functional Theory (DFT) calculations. Our results demonstrate that solvent parameters have an enormous influence on the optical properties of this molecule, acting as knobs for external control of its photophysics. The Intramolecular Charge Transfer (ICT) process introduces a remarkable solvent polarity effect on the emission spectra without affecting the lowest absorption band, as confirmed by DFT simulations, including solvation effects. The calculations ascribe the lowest absorption transitions to two singlet ICT excited states, S1 and S2, with S1 having several orders of magnitude higher oscillator strength than the “dark” S2 state. Temperature and viscosity investigations suggest the existence of two emitting excited states with different structural conformations. The phosphorescence emission band observed at 77 K is assigned to a localized 3terpy state. Finally, protonation studies show that tBuTPAterpy undergoes a reversible process, making it a promising probe of the pH level in the context of acidity determination.
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Affiliation(s)
- Anna Maria Maroń
- Institute of Chemistry, University of Silesia, Szkolna 9, 40-006 Katowice, Poland
- Correspondence: (A.M.M.); (O.C.)
| | - Oliviero Cannelli
- Laboratory of Ultrafast Spectroscopy (LSU), Lausanne Centre for Ultrafast Science (LACUS), École Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland
- Correspondence: (A.M.M.); (O.C.)
| | - Etienne Christophe Socie
- Photochemical Dynamics Group, Institute of Chemical Sciences and Engineering (ISIC), École Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland
| | - Piotr Lodowski
- Institute of Chemistry, University of Silesia, Szkolna 9, 40-006 Katowice, Poland
| | - Barbara Machura
- Institute of Chemistry, University of Silesia, Szkolna 9, 40-006 Katowice, Poland
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3
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Xu W, Wei L, Wang Z, Zhu R, Jiang J, Liu H, Du J, Weng TC, Zhang YB, Huang Y, Liu W. Tracking Ultrafast Fluorescence Switch-On and Color-Tuned Dynamics in Acceptor-Donor-Acceptor Chromophore. J Phys Chem B 2021; 125:10796-10804. [PMID: 34524821 DOI: 10.1021/acs.jpcb.1c05936] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Understanding how the conformational change of conjugated molecules with acceptor-donor-acceptor (A-D-A) architecture affects their physical and optoelectronic properties is critical for determining their ultimate performance in organic electronic devices. Here, we utilized femtosecond transient absorption, time-resolved upconversion photoluminescence spectroscopy, and tunable femtosecond-stimulated Raman spectroscopy, aided by quantum chemical calculations, to systematically investigate the excited state structural dynamics of the intramolecular charge transfer of the tetramethoxy anthracene-based fluorophore 2,3,6,7-tetramethoxy 9,10-dibenzaldehydeanthracene (AnDA) and its derivative 2,3,6,7-tetramethoxy 9,10-diphenylanthracene (TMDPAn) in chloroform. In the AnDA molecule, the tetramethoxy anthracene and benzaldehyde moieties exhibit a strong ability to donate and withdraw electrons. Upon photoexcitation, AnDA shows intriguing ultrafast fluorescence switch-on and red shift dynamics on charge transfer states, and the temporal evolution of AnDA recorded by ultrafast spectroscopy reveals a dynamic picture of two-step intramolecular charge transfer assisted by ultrafast conformational changes and solvation processes. Removing the aldehyde group from TMDPAn significantly decreases the electron pulling capacity of the phenyl unit and disables charge transfer characteristics.
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Affiliation(s)
- Wenqi Xu
- School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, People's Republic of China.,STU and SIOM Joint Laboratory for Superintense Lasers and the Applications, Shanghai 201210, People's Republic of China
| | - Lei Wei
- School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, People's Republic of China
| | - Zhengxin Wang
- School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, People's Republic of China.,STU and SIOM Joint Laboratory for Superintense Lasers and the Applications, Shanghai 201210, People's Republic of China
| | - Ruixue Zhu
- School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, People's Republic of China
| | - Jiaming Jiang
- School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, People's Republic of China
| | - Huiyan Liu
- School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, People's Republic of China
| | - Juan Du
- State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
| | - Tsu-Chien Weng
- School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, People's Republic of China
| | - Yue-Biao Zhang
- School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, People's Republic of China
| | - Yifan Huang
- School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, People's Republic of China
| | - Weimin Liu
- School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, People's Republic of China.,STU and SIOM Joint Laboratory for Superintense Lasers and the Applications, Shanghai 201210, People's Republic of China
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4
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Ortiz-Rodríguez LA, Ortiz-Zayas G, Pollum M, Hoehn SJ, Jockusch S, Crespo-Hernández CE. Intramolecular Charge Transfer in the Azathioprine Prodrug Quenches Intersystem Crossing to the Reactive Triplet State in 6-Mercaptopurine †. Photochem Photobiol 2021; 98:617-632. [PMID: 34480764 DOI: 10.1111/php.13513] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2021] [Accepted: 08/30/2021] [Indexed: 11/26/2022]
Abstract
The thiopurine prodrugs 6-mercaptopurine and azathioprine are among the world's essential medications for acute lymphoblastic leukemia, immunosuppression and several autoimmune conditions. Thiopurine prodrugs are efficient UVA absorbers and singlet oxygen generators and the long-term treatment with these prodrugs correlates with a high incidence of sunlight-induced skin cancer in patients. In this contribution, we show that the electronic relaxation mechanisms and photochemical properties of azathioprine are remarkably different from those of 6-mercaptopurine upon absorption of UVA radiation. UVA excitation of 6-mercaptopurine results in nearly 100% triplet yield and up to 30% singlet oxygen generation, whereas excitation of azathioprine with UVA leads to triplet yields of 15-3% depending on pH of the aqueous solution and <1% singlet oxygen generation. While photoexcitation of 6-mercaptopurine and other thiopurine prodrugs can facilitate oxidatively generated cell damage, azathioprine's poor photosensitization ability reveals the use of interchromophoric charge-transfer interactions for the molecular design of photostable prodrugs exhibiting a remarkable reduction in photocytotoxic side effects before drug metabolization.
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Affiliation(s)
| | | | - Marvin Pollum
- Department of Chemistry, Case Western Reserve University, Cleveland, OH, USA
| | - Sean J Hoehn
- Department of Chemistry, Case Western Reserve University, Cleveland, OH, USA
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5
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Wang Q, Sui N, Gao X, Chi X, Pan L, Lu R, Zhang H, Kang Z, Zhao B, Wang Y. Study of the Photoluminescence Characteristics of 4,4'-((1 E,1' E)-Quinoxaline-2,3-diylbis(ethene-2,1-diyl))bis( N, N-dimethylaniline). J Phys Chem B 2021; 125:4132-4140. [PMID: 33853330 DOI: 10.1021/acs.jpcb.1c00655] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
A comparative investigation on the photophysical properties of a quinoxaline derivative 4,4'-((1E,1'E)-quinoxaline-2,3-diylbis(ethene-2,1-diyl))bis(N,N-dimethylaniline) (QDMA2) was performed by employing many spectroscopies. Based on the pump-dump/push-probe measurement, it is found that a solvent-stabilized charge-transfer state can participate in the relaxation of excited QDMA2 with increasing solvent polarity. Meanwhile, the aggregated QDMA2 molecules were engineered into the organic light-emitting diode test, which showed a correlated color temperature value of 1875 K. With the help of a diamond anvil cell, the pressure-dependent photoluminescence of aggregated QDMA2 shows that the intermolecular interaction can affect the color and intensity of photoluminescence through adjusting the band gap and irradiative channel of the aggregated molecules. These results are important for understanding the structure-property relationships and the rational design of functional materials for optoelectronic applications.
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Affiliation(s)
- Quan Wang
- Femtosecond Laser Laboratory, Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education), College of Physics, Jilin University, Changchun 130012, P. R. China
| | - Ning Sui
- Femtosecond Laser Laboratory, Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education), College of Physics, Jilin University, Changchun 130012, P. R. China
| | - Xiujun Gao
- Femtosecond Laser Laboratory, Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education), College of Physics, Jilin University, Changchun 130012, P. R. China
| | - Xiaochun Chi
- Femtosecond Laser Laboratory, Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education), College of Physics, Jilin University, Changchun 130012, P. R. China
| | - Lingyun Pan
- Femtosecond Laser Laboratory, Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education), College of Physics, Jilin University, Changchun 130012, P. R. China
| | - Ran Lu
- College of Chemistry, Jilin University, Changchun 130012, P. R. China
| | - Hanzhuang Zhang
- Femtosecond Laser Laboratory, Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education), College of Physics, Jilin University, Changchun 130012, P. R. China
| | - Zhihui Kang
- Femtosecond Laser Laboratory, Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education), College of Physics, Jilin University, Changchun 130012, P. R. China
| | - Bing Zhao
- State Key Laboratory of Supramolecular Structure and Materials, Jilin University, Changchun 130012, P. R. China
| | - Yinghui Wang
- Femtosecond Laser Laboratory, Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education), College of Physics, Jilin University, Changchun 130012, P. R. China
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6
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Bold S, Massin J, Giannoudis E, Koepf M, Artero V, Dietzek B, Chavarot-Kerlidou M. Spectroscopic Investigations Provide a Rationale for the Hydrogen-Evolving Activity of Dye-Sensitized Photocathodes Based on a Cobalt Tetraazamacrocyclic Catalyst. ACS Catal 2021. [DOI: 10.1021/acscatal.0c05033] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Sebastian Bold
- Laboratoire de Chimie et Biologie des Métaux, Univ.́ Grenoble Alpes, CNRS, CEA, IRIG, 17 rue des Martyrs, F-38000 Grenoble, France
- Institute of Physical Chemistry and Abbe Center of Photonics, Friedrich Schiller University Jena, Helmholtzweg 4, 07743 Jena, Germany
- Department Functional Interfaces, Leibniz Institute of Photonic Technology Jena (Leibniz-IPHT), Albert-Einstein-Straße 9, 07745 Jena, Germany
| | - Julien Massin
- Laboratoire de Chimie et Biologie des Métaux, Univ.́ Grenoble Alpes, CNRS, CEA, IRIG, 17 rue des Martyrs, F-38000 Grenoble, France
| | - Emmanouil Giannoudis
- Laboratoire de Chimie et Biologie des Métaux, Univ.́ Grenoble Alpes, CNRS, CEA, IRIG, 17 rue des Martyrs, F-38000 Grenoble, France
| | - Matthieu Koepf
- Laboratoire de Chimie et Biologie des Métaux, Univ.́ Grenoble Alpes, CNRS, CEA, IRIG, 17 rue des Martyrs, F-38000 Grenoble, France
| | - Vincent Artero
- Laboratoire de Chimie et Biologie des Métaux, Univ.́ Grenoble Alpes, CNRS, CEA, IRIG, 17 rue des Martyrs, F-38000 Grenoble, France
| | - Benjamin Dietzek
- Institute of Physical Chemistry and Abbe Center of Photonics, Friedrich Schiller University Jena, Helmholtzweg 4, 07743 Jena, Germany
- Department Functional Interfaces, Leibniz Institute of Photonic Technology Jena (Leibniz-IPHT), Albert-Einstein-Straße 9, 07745 Jena, Germany
- Center for Energy and Environmental Chemistry Jena (CEEC Jena), Friedrich Schiller University Jena, Philosophenweg 8, 07743 Jena, Germany
| | - Murielle Chavarot-Kerlidou
- Laboratoire de Chimie et Biologie des Métaux, Univ.́ Grenoble Alpes, CNRS, CEA, IRIG, 17 rue des Martyrs, F-38000 Grenoble, France
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7
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Sabek HAZ, Alazaly AMM, Salah D, Abdel-Samad HS, Ismail MA, Abdel-Shafi AA. Photophysical properties and fluorosolvatochromism of D–π–A thiophene based derivatives. RSC Adv 2020; 10:43459-43471. [PMID: 35519720 PMCID: PMC9058427 DOI: 10.1039/d0ra08433f] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2020] [Accepted: 11/24/2020] [Indexed: 12/31/2022] Open
Abstract
Solvation-dependent photophysical properties of two push–pull thiophene-based compounds with donor–π–acceptor (D–π–A) structures were investigated using absorption, fluorescence emission and time resolved spectroscopy, and supported by different solvation models. Intramolecular charge transfer characteristics of the structurally similar 2-fluoro-4-(5-(4-methoxyphenyl)thiophen-2-yl)benzonitrile (MOT) and 4-(5-(4-(dimethylamino)phenyl)thiophen-2-yl)-2-fluorobenzonitrile (DMAT) were investigated. Significant enhancement of intramolecular charge transfer strength has been observed through molecular structure modification of the electron donating group from a methoxy to dimethylamine group. Ground state absorption spectra show a small red shift of about 10 nm and 18 nm while the fluorescence emission spectra show a large red shift of about 66 nm and 162 nm on changing from the nonpolar cyclohexane to the aprotic polar DMSO for MOT and DMAT, respectively. Dipole moment change from the ground state to the charge transfer excited state is calculated to be 6.6 D in MOT and 9.0 D in DMAT. The fluorescence quantum yield, fluorescence lifetime and the derived radiative and non-radiative rate constants were found to be better correlated to the emission energy rather than any of the solvent properties. Three multi-parametric relationships were used in the interpretation of the specific versus non-specific solute–solvent interactions, namely, Kamlet–Taft, Catalán and Laurence et al. models. The findings of these approaches are used to extract useful information about different aspects of solvent effects on the photophysical properties of the two studied compounds. Kamlet–Taft solvatochromic model indicates that non-specific interactions are dominant in controlling the photophysical properties. Catalán's solvent dipolarity/polarizability parameter is found to play a significant role in solvatochromic behaviour which is also designated by the Laurence model. Solvation-dependent photophysical properties of two push–pull thiophene-based compounds with donor–π–acceptor (D–π–A) structures were investigated using absorption, fluorescence emission and time resolved spectroscopy, and supported by different solvation models.![]()
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Affiliation(s)
| | | | - Dina Salah
- Department of Physics
- Faculty of Science
- Ain Shams University
- Cairo
- Egypt
| | | | - Mohamed A. Ismail
- Department of Chemistry
- Faculty of Science
- Mansoura University
- 35516 Mansoura
- Egypt
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8
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Jancsó A, Kovács E, Cseri L, Rózsa BJ, Galbács G, Csizmadia IG, Mucsi Z. Synthesis and spectroscopic characterization of novel GFP chromophore analogues based on aminoimidazolone derivatives. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2019; 218:161-170. [PMID: 30986708 DOI: 10.1016/j.saa.2019.03.111] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/01/2018] [Accepted: 03/28/2019] [Indexed: 06/09/2023]
Abstract
In order to improve the fluorescence properties of the green fluorescent protein chromophore, p‑HOBDI ((5‑(4‑hydroxybenzylidene)‑2,3‑dimethyl‑3,5‑dihydro‑4H‑imidazol‑4‑one), sixteen dihydroimidazolone derivates were synthesized from thiohydantoin and arylaldehydes. The synthesis developed is an efficient, novel, one-pot procedure. The study provides a detailed description of the spectroscopic characteristics of the newly synthesized compounds, using p‑HOBDI as a reference. The new compounds all exhibited significantly stronger fluorescence than p‑HOBDI, up to 28 times higher quantum yields. An experimental and theoretical investigation of the relationship of the fluorescence properties with the molecular structure was also carried out. A good correlation was found between the emission wavenumber and the Hammett constant of the functional group, which suggests the intermolecular charge transfer (ICT) mechanism between the aromatic groups.
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Affiliation(s)
- Attila Jancsó
- Department of Inorganic and Analytical Chemistry, University of Szeged, Szeged H-6720, Hungary
| | - Ervin Kovács
- Institute of Materials and Environmental Chemistry, Research Centre for Natural Sciences, Hungarian Academy of Sciences, H-1117 Budapest, Hungary; Department of Chemistry, Femtonics Inc., H-1094 Budapest, Hungary
| | - Levente Cseri
- Department of Chemistry, Femtonics Inc., H-1094 Budapest, Hungary; School of Chemical Engineering & Analytical Science, The University of Manchester, Manchester, United Kingdom
| | - Balázs J Rózsa
- Two-Photon Measurement Technology Research Group, The Faculty of Information Technology, Pázmány Péter Catholic University, Budapest H-1083, Hungary; Laboratory of 3D Functional Imaging of Neuronal Networks and Dendritic Integration, Institute of Experimental Medicine, Hungarian Academy of Sciences, Budapest H-1083, Hungary
| | - Gábor Galbács
- Department of Inorganic and Analytical Chemistry, University of Szeged, Szeged H-6720, Hungary
| | - Imre G Csizmadia
- Department of Chemistry, University of Toronto, Toronto, ON M5S 3H6, Canada
| | - Zoltán Mucsi
- Department of Chemistry, Femtonics Inc., H-1094 Budapest, Hungary; Two-Photon Measurement Technology Research Group, The Faculty of Information Technology, Pázmány Péter Catholic University, Budapest H-1083, Hungary.
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9
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10
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Guerrini M, Calzolari A, Varsano D, Corni S. Quantifying the Plasmonic Character of Optical Excitations in a Molecular J-Aggregate. J Chem Theory Comput 2019; 15:3197-3203. [PMID: 30986064 PMCID: PMC6524342 DOI: 10.1021/acs.jctc.9b00220] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
![]()
The definition of plasmon at the
microscopic scale is far from
being understood. Yet, it is very important to recognize plasmonic
features in optical excitations, as they can inspire new applications
and trigger new discoveries by analogy with the rich phenomenology
of metal nanoparticle plasmons. Recently, the concepts of plasmonicity
index and the generalized plasmonicity index (GPI) have been devised
as computational tools to quantify the plasmonic nature of optical
excitations. The question may arise whether any strong absorption
band, possibly with some sort of collective character in its microscopic
origin, shares the status of plasmon. Here we demonstrate that this
is not always the case, by considering a well-known class of systems
represented by J-aggregates molecular crystals, characterized by the
intense J band of absorption. By means of first-principles simulations,
based on a many-body perturbation theory formalism, we investigate
the optical properties of a J-aggregate made of push–pull organic
dyes. We show that the effect of aggregation is to lower the GPI associated
with the J-band with respect to the isolated dye one, which corresponds
to a nonplasmonic character of the electronic excitations. In order
to rationalize our finding, we then propose a simplified one-dimensional
theoretical model of the J-aggregate. A useful microscopic picture
of what discriminates a collective molecular crystal excitation from
a plasmon is eventually obtained.
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Affiliation(s)
- Michele Guerrini
- Dipartimento FIM , Università di Modena e Reggio Emilia , I-41125 Modena , Italy.,CNR Nano Istituto Nanoscienze, Centro S3, I-41125 Modena , Italy
| | - Arrigo Calzolari
- CNR Nano Istituto Nanoscienze, Centro S3, I-41125 Modena , Italy
| | - Daniele Varsano
- CNR Nano Istituto Nanoscienze, Centro S3, I-41125 Modena , Italy
| | - Stefano Corni
- CNR Nano Istituto Nanoscienze, Centro S3, I-41125 Modena , Italy.,Dipartimento di Scienze Chimiche , Università di Padova , Padova 35131 , Italy
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11
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Chen F, Zhang W, Liu Z, Meng L, Bai B, Wang H, Li M. Enhancement of intramolecular charge transfer strength in diphenylamine substituted symmetric 1,3,4-oxadiazole derivatives. RSC Adv 2019; 9:1-10. [PMID: 35521585 PMCID: PMC9059167 DOI: 10.1039/c8ra08439d] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2018] [Accepted: 12/10/2018] [Indexed: 01/21/2023] Open
Abstract
The intramolecular charge transfer characteristic of two diphenylamine substituted symmetric 1,3,4-oxadiazole derivatives (DPAOXD and DPAOXDBEN) was studied through a combination of experimental techniques and theoretical calculations. Significant enhancement of intramolecular charge transfer strength has been found in both these compounds through molecular structure modification. The experimental result found only a small red shift in the absorption spectra (∼15 nm) but a very large red shift in the emission spectra (∼114 nm for DPAOXD and ∼140 nm for DPAOXDBEN) with increasing solvent polarity, indicating a large extent charge transfer occurred in their excited state. The increase of molecular dipole moment from the ground state to the charge transfer excited state is calculated to be 22.10 D in DPAOXD and 26.67 D in DPAOXDBEN, respectively. Theoretical calculations present clear evidence that electrons transfer from the terminal diphenylamine to the bi-1,3,4-oxadiazole rings in DPAOXD, and the two 1,3,4-oxadiazole rings and central benzene ring in DPAOXDBEN. As compared to the methoxy group, the substitution by a diphenylamine group could increase both the transferred charge and distance, which could substantially strengthen the charge transfer character. Further introduction of a central benzene ring in DPAOXDBEN could further increase the transferred distance, and then the charge transfer strength. These findings could provide good guidance for the design of molecules with high intramolecular charge transfer characteristics. Introduction of a central benzene ring could increase the charge transferred distance, and further contribute to the enhancement of the intramolecular charge transfer strength.![]()
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Affiliation(s)
- Fangyi Chen
- Key Laboratory of Automobile Materials (MOE)
- College of Materials Science and Engineering
- Jilin University
- Changchun 130012
- China
| | - Wanxi Zhang
- Key Laboratory of Automobile Materials (MOE)
- College of Materials Science and Engineering
- Jilin University
- Changchun 130012
- China
| | - Zijian Liu
- Key Laboratory of Automobile Materials (MOE)
- College of Materials Science and Engineering
- Jilin University
- Changchun 130012
- China
| | - Lingyan Meng
- Key Laboratory of Automobile Materials (MOE)
- College of Materials Science and Engineering
- Jilin University
- Changchun 130012
- China
| | - Binglian Bai
- College of Physics
- Jilin University
- Changchun 130012
- China
| | - Haitao Wang
- Key Laboratory of Automobile Materials (MOE)
- College of Materials Science and Engineering
- Jilin University
- Changchun 130012
- China
| | - Min Li
- Key Laboratory of Automobile Materials (MOE)
- College of Materials Science and Engineering
- Jilin University
- Changchun 130012
- China
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12
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Guerrini M, Calzolari A, Corni S. Solid-State Effects on the Optical Excitation of Push-Pull Molecular J-Aggregates by First-Principles Simulations. ACS OMEGA 2018; 3:10481-10486. [PMID: 30288457 PMCID: PMC6166226 DOI: 10.1021/acsomega.8b01457] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2018] [Accepted: 08/17/2018] [Indexed: 05/26/2023]
Abstract
J-aggregates are a class of low-dimensional molecular crystals which display enhanced interaction with light. These systems show interesting optical properties as an intense and narrow red-shifted absorption peak (J-band) with respect to the spectrum of the corresponding monomer. The need to theoretically investigate optical excitations in J-aggregates is twofold: a thorough first-principles description is still missing and a renewed interest is rising recently in understanding the nature of the J-band, in particular regarding the collective mechanisms involved in its formation. In this work, we investigate the electronic and optical properties of a J-aggregate molecular crystal made of ordered arrangements of organic push-pull chromophores. By using a time-dependent density functional theory approach, we assess the role of the molecular packing in the enhancement and red shift of the J-band along with the effects of confinement in the optical absorption, when moving from bulk to low-dimensional crystal structures. We simulate the optical absorption of different configurations (i.e., monomer, dimers, a polymer chain, and a monolayer sheet) extracted from the bulk crystal. By analyzing the induced charge density associated with the J-band, we conclude that it is a longitudinal excitation, delocalized along parallel linear chains and that its overall red shift results from competing coupling mechanisms, some giving red shift and others giving blue shift, which derive from both coupling between transition densities and renormalization of the single-particle energy levels.
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Affiliation(s)
- Michele Guerrini
- Dipartimento
FIM, Università di Modena e Reggio
Emilia, 41125 Modena, Italy
- CNR
Nano Istituto Nanoscienze, Centro S3, 41125 Modena, Italy
| | | | - Stefano Corni
- CNR
Nano Istituto Nanoscienze, Centro S3, 41125 Modena, Italy
- Dipartimento
di Scienze Chimiche, Università di
Padova, 35131 Padova, Italy
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13
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Wang CZ, Zhang R, Sakaguchi K, Feng X, Yu X, Elsegood MRJ, Teat SJ, Redshaw C, Yamato T. Two-Photon-Absorption Properties of Pyrene-Based Dipolar D-π-A Fluorophores. CHEMPHOTOCHEM 2018. [DOI: 10.1002/cptc.201800053] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Chuan-Zeng Wang
- Department of Applied Chemistry Faculty of Science and Engineering; Saga University; Honjo-machi 1 Saga 840-8502 Japan
| | - Ruoyao Zhang
- Center of Bio & Micro/Nano Functional Materials State Key Laboratory of Crystal Materials; Shandong University; Jinan 250100 China
| | - Koya Sakaguchi
- Department of Applied Chemistry Faculty of Science and Engineering; Saga University; Honjo-machi 1 Saga 840-8502 Japan
| | - Xing Feng
- Faculty of Material and Energy Engineering; Guangdong University of Technology; Guangzhou 510006 China
| | - Xiaoqiang Yu
- Center of Bio & Micro/Nano Functional Materials State Key Laboratory of Crystal Materials; Shandong University; Jinan 250100 China
| | | | - Simon J. Teat
- ALS, Berkeley Lab; 1 Cyclotron Road Berkeley CA 94720 USA
| | - Carl Redshaw
- Chemistry School of Mathematics & Physical Sciences.; The University of Hull; Cottingham Road, Hull Yorkshire HU6 7RX UK
| | - Takehiko Yamato
- Department of Applied Chemistry Faculty of Science and Engineering; Saga University; Honjo-machi 1 Saga 840-8502 Japan
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14
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Dixit MK, Dubey M. Li+-Induced fluorescent metallogel: a case of ESIPT-CHEF and ICT phenomenon. Phys Chem Chem Phys 2018; 20:23762-23772. [DOI: 10.1039/c8cp04579h] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
A fluorescent metallogel has been synthesized from non-fluorescent ingredients viz. the smallest possible LMW aromatic symmetrical gelator 1 and LiOH, whereas KOH produces a non-fluorescent solution, and regioisomer 2 with LiOH shows an ICT assisted fluorescent precipitate rather than a metallogel.
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Affiliation(s)
- Manish Kumar Dixit
- Department of Chemistry
- Indian Institute of Technology (Banaras Hindu University)
- Varanasi – 221005
- India
| | - Mrigendra Dubey
- Soft Materials Research Laboratory
- Discipline of Metallurgy Engineering and Materials Science
- Indian Institute of Technology Indore
- Indore 453552
- India
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15
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Chen F, Zhang W, Tian T, Bai B, Wang H, Li M. Substituent Effect on Intramolecular Charge Transfer of Symmetric Methoxy-Substituted Bi-1,3,4-oxadiazole Derivatives. J Phys Chem A 2017; 121:8399-8407. [DOI: 10.1021/acs.jpca.7b08845] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Fangyi Chen
- Key Laboratory of Automobile Materials (MOE) & College of Materials Science and Engineering, Jilin University, Changchun 130012, China
| | - Wanxi Zhang
- Key Laboratory of Automobile Materials (MOE) & College of Materials Science and Engineering, Jilin University, Changchun 130012, China
| | - Taiji Tian
- Key Laboratory of Automobile Materials (MOE) & College of Materials Science and Engineering, Jilin University, Changchun 130012, China
| | - Binglian Bai
- College
of Physics, Jilin University, Changchun 130012, China
| | - Haitao Wang
- Key Laboratory of Automobile Materials (MOE) & College of Materials Science and Engineering, Jilin University, Changchun 130012, China
- Institute
of Theoretical Chemistry, Jilin University, Changchun 130023, China
| | - Min Li
- Key Laboratory of Automobile Materials (MOE) & College of Materials Science and Engineering, Jilin University, Changchun 130012, China
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