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Stoerkler T, Ulrich G, Retailleau P, Laurent AD, Jacquemin D, Massue J. Experimental and theoretical comprehension of ESIPT fluorophores based on a 2-(2'-hydroxyphenyl)-3,3'-dimethylindole (HDMI) scaffold. Chem Sci 2024; 15:7206-7218. [PMID: 38756821 PMCID: PMC11095508 DOI: 10.1039/d4sc01937g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2024] [Accepted: 04/16/2024] [Indexed: 05/18/2024] Open
Abstract
Excited-State Intramolecular Proton Transfer (ESIPT) emission is associated with intense single or multiple fluorescence in the solid-state, along with enhanced photostability and sensitivity to the close environment. As a result, ESIPT probes are attractive candidates for ratiometric sensing of a variety of substrates. A new family of ESIPT fluorophores is described herein, inspired by the well-known 2-(2'hydroxyphenyl)benzazole (HBX) organic scaffold. The connection of 3,3'-dimethylindole (or 3H-indole) derivatives with phenol rings triggers the formation of novel 2-(2'-hydroxyphenyl)-3,3'-dimethylindole (HDMI) fluorophores, capable of stimuli-responsive ESIPT emission. This brand new family of dyes displays redshifted emission, as compared to HBX, along with an unprecedented acid/base-mediated stabilization of different rotamers, owing to supramolecular interactions with methyl groups. These compounds are therefore highly sensitive to external stimuli, such as the presence of acid or base, where protonated and deprotonated species have specific optical signatures. Moreover, a new pyridine-functionalized HDMI dye displays acid-sensitive AIE properties. The photophysical properties of all compounds have also been studied using ab initio calculations to support experiments in deciphering the nature of the various radiative transitions observed and the related excited rotameric species.
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Affiliation(s)
- Timothée Stoerkler
- Institut de Chimie et Procédés pour l'Energie, l'Environnement et la Santé (ICPEES), Equipe Chimie Organique pour la Biologie, les Matériaux et l'Optique (COMBO), UMR CNRS 7515, Ecole Européenne de Chimie, Polymères et Matériaux (ECPM) 25 Rue Becquerel 67087 Strasbourg Cedex 02 France
| | - Gilles Ulrich
- Institut de Chimie et Procédés pour l'Energie, l'Environnement et la Santé (ICPEES), Equipe Chimie Organique pour la Biologie, les Matériaux et l'Optique (COMBO), UMR CNRS 7515, Ecole Européenne de Chimie, Polymères et Matériaux (ECPM) 25 Rue Becquerel 67087 Strasbourg Cedex 02 France
| | - Pascal Retailleau
- Service de Cristallographie Structurale, ICSN-CNRS, Université Paris-Saclay 1 Avenue de la Terrasse, Bât. 27 91198 Gif-sur-Yvette Cedex France
| | - Adèle D Laurent
- Nantes Université, CNRS CEISAM UMR 6230 F-44000 Nantes France
| | - Denis Jacquemin
- Nantes Université, CNRS CEISAM UMR 6230 F-44000 Nantes France
- Institut Universitaire de France (IUF) F-75005 Paris France
| | - Julien Massue
- Institut de Chimie et Procédés pour l'Energie, l'Environnement et la Santé (ICPEES), Equipe Chimie Organique pour la Biologie, les Matériaux et l'Optique (COMBO), UMR CNRS 7515, Ecole Européenne de Chimie, Polymères et Matériaux (ECPM) 25 Rue Becquerel 67087 Strasbourg Cedex 02 France
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Harshitha D, Kumar A, Mahesh HM, Renuka CG. Anthocyanins of Delonix Regia Floral Petals: A Novel Approach on Fluorescence Enhancement, Forster Resonance Energy Transfer Mechanism and Photostability Studies for Optoelectronic Applications. J Fluoresc 2024:10.1007/s10895-024-03730-9. [PMID: 38739317 DOI: 10.1007/s10895-024-03730-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2024] [Accepted: 04/17/2024] [Indexed: 05/14/2024]
Abstract
In this work, we focused on extracting the anthocyanin dye in acetone, butanol, ethanol, and water solvents from Delonix regia flowers by a simple maceration extraction process. The identification of functional group analysis, vibrational studies, energy transfer mechanisms, optoelectronic properties, photostability studies, FRET-assisted potential light emissions and photometric properties of the anthocyanin dyes are successively investigated. FTIR spectroscopy and vibrational studies have confirmed the existence of polyphenolic groups in 2-phenyl chromenylium (anthocyanin) dyes. The optoelectronic results show the least direct bandgap (2.04 eV), indirect bandgap (1.55 eV), Urbach energy (0.380 eV), high refractive index (1.20), dielectric constant (2.794), and high optical conductivity (1.954 × 103 S/m) for the anthocyanin dye extracted found in water solvent. The photoluminescence properties such as Stoke's shift, high quantum yield, and lifetime results show that anthocyanin dyes are promising candidates for red-LEDs and optical materials. The absorption and emission spectra of the anthocyanin dyes follow the mirror image rule and the Franck-Condon factor exists between vibrational energy levels corresponding to all the electronic transitions. The excellent correspondence between the absorption and emission spectra reinforces that the anthocyanins are efficient (46%) FRET probes. Further, photometric properties such as CIE, CRI, CCT and colour purity results of anthocyanins in all studied solvents revealed that this material exhibits orange to red shades (x = 0.48 → 0.54 and y = 0.36 →0.45) and is well suitable for have great potential in the manufacturing of Organic-LEDs and other optoelectronic device applications.
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Affiliation(s)
- D Harshitha
- Department of Physics, Bangalore University, Jnanabharathi campus, Bengaluru, 560056, India
| | - Anil Kumar
- Department of Physics, Government First Grade College, Sindhanur, 584128, India
| | - H M Mahesh
- Department of Electronic Science, Bangalore University, Jnanabharathi campus, Bangalore, 560056, India
| | - C G Renuka
- Department of Physics, Bangalore University, Jnanabharathi campus, Bengaluru, 560056, India.
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Bhattacharjee S, Seth D. Unraveling the Photoluminescence Properties of a Boron Nitride Nanosheet Dispersed in Different Solvents and Its Application to Generate White Light. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:772-787. [PMID: 38153231 DOI: 10.1021/acs.langmuir.3c02968] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/29/2023]
Abstract
Hexagonal boron nitride (h-BN) is an influential 2D nanomaterial; however, its practical optoelectronic applications rely primarily on controlling the structural defects. The photoluminescence depends explicitly on the developed vacancies and substitutional defects. The present work utilizes the concept of facile liquid-phase exfoliation of hexagonal (h) boron nitride (BN) powder in common organic solvents and cosolvent mixtures to obtain a layered boron nitride nanosheet (BNNS). Although the literature concerning the layered structure of BNNS obtained by different methods is substantial, what is lacking is a detailed photoluminescence study of the layered structure obtained by changing the solvent and cosolvent mixtures, and here lies the novelty of our work. The obtained layered structure was subjected to a detailed photoluminescence study by varying the temperature. We tried to correlate how the defects originating upon changing the solvent and cosolvent affected the photoluminescence of the layered BNNS. The obtained layered structure is suitably supported by optical and electron microscopy images. High-resolution transmission electron microscopy confirm the presence of a few layers, and X-ray photoelectron spectroscopy studies give an idea of the atomic composition of the obtained BNNS. The photoluminescence properties of the obtained BNNS in water were modulated by the addition of two different classes of block copolymers, e.g., Pluronic (F-68, P-407, and P-123) and Tetronic (T-904, T-908, and T-90R4) copolymers. As an application, we were successful in constructing a nanocomposite material made up of a BNNS-copolymer-organic fluorophore to check the possibilities of generating white light.
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Affiliation(s)
- Sanyukta Bhattacharjee
- Department of Chemistry, Indian Institute of Technology Patna, Patna 801103, Bihar, India
| | - Debabrata Seth
- Department of Chemistry, Indian Institute of Technology Patna, Patna 801103, Bihar, India
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Zhao X, Yin H, Zhang W, Guo J, Shi Y. ESIPT-induced spin-orbit coupling enhancement leads to tautomer fluorescence quenching of the 10-HHBF molecule. Phys Chem Chem Phys 2023; 25:21604-21611. [PMID: 37551530 DOI: 10.1039/d3cp02237d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/09/2023]
Abstract
We present novel insights into the interplay between excited state intramolecular proton transfer (ESIPT) and spin-orbit coupling (SOC) in the 10-hydroxy-11H-benzo[b]fluoren-11-one (10-HHBF) molecule, utilizing the time-dependent density functional theory approach and femtosecond transient absorption spectroscopy. Our discoveries entail a reassessment of the luminescence mechanism for 10-HHBF, characterizing it as an ESIPT fluorophore. Additionally, we demonstrate that the molecule undergoes intersystem crossing (ISC) following proton transfer, which quenches the fluorescence of the proton-transferred state, thus resulting in the absence of dual emission and a limited spectral range of fluorescence. Furthermore, our investigation reveals that 10-HHBF displays an SOC enhancement feature induced by ESIPT, which facilitates the ISC process. This trait serves as a barrier to the application of 10-HHBF in single-molecule white light emitters (SMWLEs). Our findings underscore the notable influence of the ESIPT-induced spin-orbit interaction enhancement on luminescent properties, which necessitates consideration in the design of SMWLEs.
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Affiliation(s)
- Xin Zhao
- Institute of Atomic and Molecular Physics, Jilin University, Changchun, 130012, China.
| | - Hang Yin
- Institute of Atomic and Molecular Physics, Jilin University, Changchun, 130012, China.
| | - Wentian Zhang
- Institute of Atomic and Molecular Physics, Jilin University, Changchun, 130012, China.
| | - Jie Guo
- Institute of Atomic and Molecular Physics, Jilin University, Changchun, 130012, China.
| | - Ying Shi
- Institute of Atomic and Molecular Physics, Jilin University, Changchun, 130012, China.
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Ferté A, Houssin A, Albouy N, Merritt ICD, Vacher M. ESIPT in the pyrrol pyridine molecule: mechanism, timescale and yield revealed using dynamics simulations. Phys Chem Chem Phys 2023; 25:9761-9765. [PMID: 36857691 DOI: 10.1039/d3cp00026e] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/18/2023]
Abstract
Excited State Intramolecular Proton Transfer in pyrrol pyridine is theoretically investigated using non-adiabatic dynamics simulations. The photochemical process is completely characterised: the reaction time, the total yield and the accessibility of the conical intersection are evaluated. Finally, new mechanistic interpretation are extracted: the proton transfer reaction in this molecule is shown to be driven by two complementary mechanisms.
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Affiliation(s)
- Anthony Ferté
- Nantes Université, CNRS, CEISAM, UMR 6230, Nantes F-44000, France.
| | - Axel Houssin
- Nantes Université, CNRS, CEISAM, UMR 6230, Nantes F-44000, France.
| | - Nina Albouy
- Nantes Université, CNRS, CEISAM, UMR 6230, Nantes F-44000, France. .,Département de Chimie, École Normale Supérieure, PSL University, Paris 75005, France
| | | | - Morgane Vacher
- Nantes Université, CNRS, CEISAM, UMR 6230, Nantes F-44000, France.
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Dias GG, O Rodrigues M, Paz ERS, P Nunes M, Araujo MH, Rodembusch FS, da Silva Júnior EN. Aryl-Phenanthro[9,10- d]imidazole: A Versatile Scaffold for the Design of Optical-Based Sensors. ACS Sens 2022; 7:2865-2919. [PMID: 36250642 DOI: 10.1021/acssensors.2c01687] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Fluorescent and colorimetric sensors are important tools for investigating the chemical compositions of different matrices, including foods, environmental samples, and water. The high sensitivity, low interference, and low detection limits of these sensors have inspired scientists to investigate this class of sensing molecules for ion and molecule detection. Several examples of fluorescent and colorimetric sensors have been described in the literature; this Review focuses particularly on phenanthro[9,10-d]imidazoles. Different strategies have been developed for obtaining phenanthro[9,10-d]imidazoles, which enable modification of their optical properties upon interaction with specific analytes. These sensing responses usually involve changes in the fluorescence intensity and/or color arising from processes like photoinduced electron transfer, intramolecular charge transfer, intramolecular proton transfer in the excited state, and Förster resonance energy transfer. In this Review, we categorized these sensors into two different groups: those bearing formyl groups and their derivatives and those based on other molecular groups. The different optical responses of phenanthro[9,10-d]imidazole-based sensors upon interaction with specific analytes are discussed.
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Affiliation(s)
- Gleiston G Dias
- Institute of Exact Sciences, Department of Chemistry, Federal University of Minas Gerais, Belo Horizonte, 31270-901, MG. Brazil
| | - Marieli O Rodrigues
- Instituto de Química, Universidade Federal do Rio Grande do Sul, Av. Bento Gonçalves 9500, CEP, Porto Alegre 91501-970, RS. Brazil
| | - Esther R S Paz
- Institute of Exact Sciences, Department of Chemistry, Federal University of Minas Gerais, Belo Horizonte, 31270-901, MG. Brazil
| | - Mateus P Nunes
- Institute of Exact Sciences, Department of Chemistry, Federal University of Minas Gerais, Belo Horizonte, 31270-901, MG. Brazil
| | - Maria H Araujo
- Institute of Exact Sciences, Department of Chemistry, Federal University of Minas Gerais, Belo Horizonte, 31270-901, MG. Brazil
| | - Fabiano S Rodembusch
- Instituto de Química, Universidade Federal do Rio Grande do Sul, Av. Bento Gonçalves 9500, CEP, Porto Alegre 91501-970, RS. Brazil
| | - Eufrânio N da Silva Júnior
- Institute of Exact Sciences, Department of Chemistry, Federal University of Minas Gerais, Belo Horizonte, 31270-901, MG. Brazil
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Chaihan K, Semakul N, Promarak V, Bui TT, Kungwan N, Goubard F. Tunable far-red fluorescence utilizing π-extension and substitution on the excited state intramolecular proton transfer (ESIPT) of naphthalene-based Schiff bases: A combined experimental and theoretical study. J Photochem Photobiol A Chem 2022. [DOI: 10.1016/j.jphotochem.2022.114047] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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Hurley JJM, Zhu L. Excitation Energy-Dependent, Excited-State Intramolecular Proton Transfer-Based Dual Emission in Poor Hydrogen-Bonding Solvents. J Phys Chem A 2022; 126:5711-5720. [PMID: 35980823 DOI: 10.1021/acs.jpca.2c03668] [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
2-(2'-Hydroxyphenyl)benzoxazole (HBO) substituted at the 5'-position with bipyridylvinylene phenylenevinylene (compound 2) produces both normal and, via an excited-state intramolecular proton transfer (ESIPT) reaction, tautomer emissions in solvents that preserve intramolecular hydrogen bonds. The abundance of the tautomer emission from compound 2 in a poor hydrogen-bonding solvent increases in response to the application of a higher excitation energy. Based on quantum chemical calculations, the excitation-dependent dual emission is consistent with a model in which the ESIPT reaction is more favored in the S2 than in the S1 electronically excited state.
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Affiliation(s)
- Joseph J M Hurley
- Department of Chemistry and Biochemistry, Florida State University, 95 Chieftan Way, Tallahassee, Florida 32306-4390, United States
| | - Lei Zhu
- Department of Chemistry and Biochemistry, Florida State University, 95 Chieftan Way, Tallahassee, Florida 32306-4390, United States
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Durko-Maciag M, Jacquemin D, Ulrich G, Massue J, Mysliwiec J. Color-Tunable Multifunctional Excited-State Intramolecular Proton Transfer Emitter: Stimulated Emission of a Single Dye. Chemistry 2022; 28:e202201327. [PMID: 35616178 DOI: 10.1002/chem.202201327] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2022] [Indexed: 01/09/2023]
Abstract
The excited-state intramolecular proton transfer chromophores were regarded as good materials for laser action generation due to their inherent four-level photocycle. The excitation-dependent properties of these compounds enable light amplification from two distinct forms: both enol and keto, making it possible to obtain dual fluorescence emission. Herein, we report that a third option is possible for the first time stimulated emission was realized with a deprotonated ESIPT molecule based on a novel rigidified 2-(2'-hydroxyphenyl)benzothiazole derivative, triggering the possibility to fabricate real-time tunable active material. Through the rational engineering of the ratio of each emissive species, a red-green-blue device was fabricated with the possibility of white light generation. The degenerated two-wave mixing setup was applied to construct a continuously tunable distributed feedback laser.
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Affiliation(s)
- Martyna Durko-Maciag
- Adv. Mater. Engineering and Modelling Group, Wroclaw University of Science and Technology, Wybrzeze Wyspianskiego 27, 50-370, Wroclaw, Poland.,Insitut de Chimie et Procédés pour l'Energie, l'Environnement et la Santé (ICPEES), UMR CNRS 7515, Universite de Strasbourg, 25 Rue Becquerel, 67087, Strasbourg, France
| | - Denis Jacquemin
- Laboratoire CEISAM UMR CNRS 6230, Nantes University, 2 Rue de la Houssiniere, 44322, Nantes, France
| | - Gilles Ulrich
- Insitut de Chimie et Procédés pour l'Energie, l'Environnement et la Santé (ICPEES), UMR CNRS 7515, Universite de Strasbourg, 25 Rue Becquerel, 67087, Strasbourg, France
| | - Julien Massue
- Insitut de Chimie et Procédés pour l'Energie, l'Environnement et la Santé (ICPEES), UMR CNRS 7515, Universite de Strasbourg, 25 Rue Becquerel, 67087, Strasbourg, France
| | - Jaroslaw Mysliwiec
- Adv. Mater. Engineering and Modelling Group, Wroclaw University of Science and Technology, Wybrzeze Wyspianskiego 27, 50-370, Wroclaw, Poland
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Munch M, Ulrich G, Massue J. Synthesis and Optical Properties of Excited-State Intramolecular Proton Transfer (ESIPT) Emitters with Sulfobetaine Fragments. Org Biomol Chem 2022; 20:4640-4649. [PMID: 35612088 DOI: 10.1039/d2ob00691j] [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
This article describes the synthetic efforts towards the solubilization of organic fluorescent emitters based on a 2-(2'-hydroxybenzofuranyl)benzazole (HBBX) scaffold in aqueous media under physiological conditions (PBS, pH 7.4). These dyes are well-known to display the excited-state intramolecular proton transfer (ESIPT) process which leads to a Stokes-shifted fluorescence with enhanced photostability and strong environment dependent features. Organic dyes are hydrophobic by nature and their vectorization into aqueous media usually necessitates amphiphilic polymers. In this study, we show that the incorporation of one or two sulfobetaine fragments, a highly biocompatible zwitterionic unit leads to the vectorization in buffer solution at pH 7.4 while keeping a reasonable ESIPT fluorescence emission. The photophysical properties of all dyes were studied in multiple solvents and showed that, depending on structure and environment, different excited-state species are observed: normal or tautomeric species, as well as a competitive anionic fluorescent derivative. This study shows that it is not only possible to solubilize fluorescent ESIPT dyes in water using sulfobetaine(s) but also that the optical properties can be finely tuned depending on small structural inputs.
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Affiliation(s)
- Maxime Munch
- Institut de Chimie et Procédés pour l'Energie, l'Environnement et la Santé (ICPEES), Equipe Chimie Organique pour la Biologie, les Matériaux et l'Optique (COMBO), UMR CNRS 7515, Ecole Européenne de Chimie, Polymères et Matériaux (ECPM), Université de Strasbourg, 25 Rue Becquerel, 67087 Strasbourg Cedex 02, France.
| | - Gilles Ulrich
- Institut de Chimie et Procédés pour l'Energie, l'Environnement et la Santé (ICPEES), Equipe Chimie Organique pour la Biologie, les Matériaux et l'Optique (COMBO), UMR CNRS 7515, Ecole Européenne de Chimie, Polymères et Matériaux (ECPM), Université de Strasbourg, 25 Rue Becquerel, 67087 Strasbourg Cedex 02, France.
| | - Julien Massue
- Institut de Chimie et Procédés pour l'Energie, l'Environnement et la Santé (ICPEES), Equipe Chimie Organique pour la Biologie, les Matériaux et l'Optique (COMBO), UMR CNRS 7515, Ecole Européenne de Chimie, Polymères et Matériaux (ECPM), Université de Strasbourg, 25 Rue Becquerel, 67087 Strasbourg Cedex 02, France.
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Li W, Chasing P, Nalaoh P, Chawanpunyawat T, Sukpattanacharoen C, Kungwan N, Sudyoadsuk T, Promarak V. Hydroxy‐Tetraphenylimidazole Derivatives as Efficient Blue Emissive Materials for Electroluminescent Devices. Chem Asian J 2022; 17:e202200266. [DOI: 10.1002/asia.202200266] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2022] [Revised: 04/18/2022] [Indexed: 11/07/2022]
Affiliation(s)
- Wan Li
- Department of Materials Science and Engineering School of Molecular Science and Engineering Vidyasirimedhi Institute of Science and Technology 21210 Wangchan Rayong Thailand
| | - Pongsakorn Chasing
- Department of Materials Science and Engineering School of Molecular Science and Engineering Vidyasirimedhi Institute of Science and Technology 21210 Wangchan Rayong Thailand
| | - Phattananawee Nalaoh
- Department of Materials Science and Engineering School of Molecular Science and Engineering Vidyasirimedhi Institute of Science and Technology 21210 Wangchan Rayong Thailand
| | - Thanyarat Chawanpunyawat
- Department of Materials Science and Engineering School of Molecular Science and Engineering Vidyasirimedhi Institute of Science and Technology 21210 Wangchan Rayong Thailand
| | | | - Nawee Kungwan
- Department of Chemistry Faculty of Science Chiang Mai University Muang District 50200 Chiang Mai Thailand
| | - Taweesak Sudyoadsuk
- Department of Materials Science and Engineering School of Molecular Science and Engineering Vidyasirimedhi Institute of Science and Technology 21210 Wangchan Rayong Thailand
| | - Vinich Promarak
- Department of Materials Science and Engineering School of Molecular Science and Engineering Vidyasirimedhi Institute of Science and Technology 21210 Wangchan Rayong Thailand
- Research Network of NANOTEC-VISTEC on Nanotechnology for Energy Vidyasirimedhi Institute of Science and Technology 21210 Wangchan Rayong Thailand
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Stoerkler T, Pariat T, Laurent AD, Jacquemin D, Ulrich G, Massue J. Excited-State Intramolecular Proton Transfer Dyes with Dual-State Emission Properties: Concept, Examples and Applications. Molecules 2022; 27:molecules27082443. [PMID: 35458640 PMCID: PMC9024454 DOI: 10.3390/molecules27082443] [Citation(s) in RCA: 25] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2022] [Revised: 04/08/2022] [Accepted: 04/08/2022] [Indexed: 11/30/2022] Open
Abstract
Dual-state emissive (DSE) fluorophores are organic dyes displaying fluorescence emission both in dilute and concentrated solution and in the solid-state, as amorphous, single crystal, polycrystalline samples or thin films. This comes in contrast to the vast majority of organic fluorescent dyes which typically show intense fluorescence in solution but are quenched in concentrated media and in the solid-state owing to π-stacking interactions; a well-known phenomenon called aggregation-caused quenching (ACQ). On the contrary, molecular rotors with a significant number of free rotations have been engineered to show quenched emission in solution but strong fluorescence in the aggregated-state thanks to restriction of the intramolecular motions. This is the concept of aggregation-induced emission (AIE). DSE fluorophores have been far less explored despite the fact that they are at the crossroad of ACQ and AIE phenomena and allow targeting applications both in solution (bio-conjugation, sensing, imaging) and solid-state (organic electronics, data encryption, lasing, luminescent displays). Excited-State Intramolecular Proton Transfer (ESIPT) fluorescence is particularly suitable to engineer DSE dyes. Indeed, ESIPT fluorescence, which relies on a phototautomerism between normal and tautomeric species, is characterized by a strong emission in the solid-state along with a large Stokes’ shift, an enhanced photostability and a strong sensitivity to the close environment, a feature prone to be used in bio-sensing. A drawback that needs to be overcome is their weak emission intensity in solution, owing to detrimental molecular motions in the excited-state. Several strategies have been proposed in that regard. In the past few years, a growing number of examples of DSE-ESIPT dyes have indeed emerged in the literature, enriching the database of such attractive dyes. This review aims at a brief but concise overview on the exploitation of ESIPT luminescence for the optimization of DSE dyes properties. In that perspective, a synergistic approach between organic synthesis, fluorescence spectroscopy and ab initio calculations has proven to be an efficient tool for the construction and optimization of DSE-ESIPT fluorophores.
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Affiliation(s)
- Timothée Stoerkler
- Institut de Chimie et Procédés pour l’Energie, l’Environnement et la Santé (ICPEES), Equipe Chimie Organique pour la Biologie, les Matériaux et l’Optique (COMBO), UMR CNRS 7515, Ecole Européenne de Chimie, Polymères et Matériaux (ECPM), Université de Strasbourg, 25 Rue Becquerel, CEDEX 02, 67087 Strasbourg, France; (T.S.); (T.P.); (G.U.)
| | - Thibault Pariat
- Institut de Chimie et Procédés pour l’Energie, l’Environnement et la Santé (ICPEES), Equipe Chimie Organique pour la Biologie, les Matériaux et l’Optique (COMBO), UMR CNRS 7515, Ecole Européenne de Chimie, Polymères et Matériaux (ECPM), Université de Strasbourg, 25 Rue Becquerel, CEDEX 02, 67087 Strasbourg, France; (T.S.); (T.P.); (G.U.)
| | - Adèle D. Laurent
- Chimie et Interdisciplinarités: Synthèse, Analyse et Modélisation (CEISAM), UMR CNRS 6230, Nantes University, 44322 Nantes, France;
| | - Denis Jacquemin
- Chimie et Interdisciplinarités: Synthèse, Analyse et Modélisation (CEISAM), UMR CNRS 6230, Nantes University, 44322 Nantes, France;
- Correspondence: (D.J.); (J.M.)
| | - Gilles Ulrich
- Institut de Chimie et Procédés pour l’Energie, l’Environnement et la Santé (ICPEES), Equipe Chimie Organique pour la Biologie, les Matériaux et l’Optique (COMBO), UMR CNRS 7515, Ecole Européenne de Chimie, Polymères et Matériaux (ECPM), Université de Strasbourg, 25 Rue Becquerel, CEDEX 02, 67087 Strasbourg, France; (T.S.); (T.P.); (G.U.)
| | - Julien Massue
- Institut de Chimie et Procédés pour l’Energie, l’Environnement et la Santé (ICPEES), Equipe Chimie Organique pour la Biologie, les Matériaux et l’Optique (COMBO), UMR CNRS 7515, Ecole Européenne de Chimie, Polymères et Matériaux (ECPM), Université de Strasbourg, 25 Rue Becquerel, CEDEX 02, 67087 Strasbourg, France; (T.S.); (T.P.); (G.U.)
- Correspondence: (D.J.); (J.M.)
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Tarai M, Singh A, Pati AK, Mishra AK. Resolving fluorescence signatures of a photoconvertible fluorophore by fluorescence spectroscopy and MCR-ALS-based combinatorial approach. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2022; 268:120683. [PMID: 34920288 DOI: 10.1016/j.saa.2021.120683] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/18/2021] [Revised: 11/22/2021] [Accepted: 11/26/2021] [Indexed: 06/14/2023]
Abstract
Photoconvertible fluorophores are important for a myriad of applications in chemistry and biology. Here, we spectrally resolve and quantify individual photophysical information of a dual-emitting photoconvertible fluorophore by fluorescence spectroscopy and multivariate curve resolution-alternate least square techniques. We found that the reactant fluorophore, which shows a weak locally excited (LE) emission and a dominant intramolecular charge transfer (ICT) emission, also exhibits an intermolecular charge transfer emission. The ICT emission bands of both the reactant and product fluorophores are originated from their respective LE states. The reactant fluorophore is a mixture of its different ground state conformers. Higher yields of photoconversion of the yellow-emitting reactant fluorophore are achieved via a visible light photoreaction, leading to formation of pure white light at an intermediate photoreaction time. These findings together help us to glean new photophysical and photochemical insights into the photoreaction of a dual-emitting photoconvertible fluorophore.
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Affiliation(s)
- Madhumita Tarai
- MIT School of Bioengineering Sciences & Research, MIT ADT University, Loni Kalbhor, Maharashtra 412201, India; Indian Institute of Technology Madras, Chennai 600036, India.
| | - Anuja Singh
- Indian Institute of Technology Madras, Chennai 600036, India
| | - Avik Kumar Pati
- Indian Institute of Technology Madras, Chennai 600036, India
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14
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Munch M, Colombain E, Stoerkler T, Vérité PM, Jacquemin D, Ulrich G, Massue J. Blue-Emitting 2-(2'-Hydroxyphenyl)benzazole Fluorophores by Modulation of Excited-State Intramolecular Proton Transfer: Spectroscopic Studies and Theoretical Calculations. J Phys Chem B 2022; 126:2108-2118. [PMID: 35238563 DOI: 10.1021/acs.jpcb.2c00383] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
This article describes the synthesis, spectroscopic studies, and theoretical calculations of nine original fluorophores based on the 2-(2'-hydroxyphenyl)benzazole (HBX) scaffold, functionalized at the 4-position of the phenol ring by ethynyl-extended aniline moieties. HBX dyes are well-known to display an excited-state intramolecular proton transfer (ESIPT) process, owing to a strong six-membered hydrogen bond in their structure that allows for an enol/keto tautomerism after photoexcitation. Appropriate electronic substitution can perturb the ESIPT process, leading to dual fluorescence, both excited tautomers emitting at specific wavelengths. In the examples described herein, it is demonstrated that the proton transfer can be finely frustrated by a modification of the constitutive heteroring, leading to a single emission band from the excited enol or keto tautomer or a dual emission with relative intensities highly dependent on the environment. Moreover, the nature of the functionalization of the N-alkylated aniline moiety also has a significant importance on the relative excited-state stabilities of the two tautomers in solution. To shed more light on these features, quantum chemical calculations by the density functional theory are used to determine the excited-state energies and rationalize the experimental spectroscopic data.
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Affiliation(s)
- Maxime Munch
- Institut de Chimie et Procédés pour l'Energie, l'Environnement et la Santé (ICPEES), Equipe Chimie Organique pour la Biologie, les Matériaux et l'Optique (COMBO), UMR CNRS 7515, Ecole Européenne de Chimie, Polymères et Matériaux (ECPM), 25 Rue Becquerel, 67087 Strasbourg Cedex 02, France
| | - Erika Colombain
- Institut de Chimie et Procédés pour l'Energie, l'Environnement et la Santé (ICPEES), Equipe Chimie Organique pour la Biologie, les Matériaux et l'Optique (COMBO), UMR CNRS 7515, Ecole Européenne de Chimie, Polymères et Matériaux (ECPM), 25 Rue Becquerel, 67087 Strasbourg Cedex 02, France
| | - Timothée Stoerkler
- Institut de Chimie et Procédés pour l'Energie, l'Environnement et la Santé (ICPEES), Equipe Chimie Organique pour la Biologie, les Matériaux et l'Optique (COMBO), UMR CNRS 7515, Ecole Européenne de Chimie, Polymères et Matériaux (ECPM), 25 Rue Becquerel, 67087 Strasbourg Cedex 02, France
| | - Pauline M Vérité
- CEISAM, UMR CNRS 6230, University of Nantes, 44322 Nantes, France
| | - Denis Jacquemin
- CEISAM, UMR CNRS 6230, University of Nantes, 44322 Nantes, France
| | - Gilles Ulrich
- Institut de Chimie et Procédés pour l'Energie, l'Environnement et la Santé (ICPEES), Equipe Chimie Organique pour la Biologie, les Matériaux et l'Optique (COMBO), UMR CNRS 7515, Ecole Européenne de Chimie, Polymères et Matériaux (ECPM), 25 Rue Becquerel, 67087 Strasbourg Cedex 02, France
| | - Julien Massue
- Institut de Chimie et Procédés pour l'Energie, l'Environnement et la Santé (ICPEES), Equipe Chimie Organique pour la Biologie, les Matériaux et l'Optique (COMBO), UMR CNRS 7515, Ecole Européenne de Chimie, Polymères et Matériaux (ECPM), 25 Rue Becquerel, 67087 Strasbourg Cedex 02, France
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15
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Meisner QJ, Hurley JJM, Guo P, Blood AR, Schaller RD, Gosztola DJ, Wiederrecht GP, Zhu L. Triple Emission of 5'-( para-R-Phenylene)vinylene-2-(2'-hydroxyphenyl)benzoxazole (PVHBO). Part I: Dual Emission from the Neutral Species. J Phys Chem A 2022; 126:1033-1061. [PMID: 35143188 DOI: 10.1021/acs.jpca.1c10165] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The effects of 5'-(para-R-phenylene)vinylene (PV) substituents on the emission properties of 2-(2'-hydroxyphenyl)benzoxazole (HBO) are analyzed using steady-state and time-resolved absorption and emission spectroscopies in addition to quantum chemical calculations. All members in the series of PVHBOs are capable of excited-state intramolecular proton transfer (ESIPT) with a solvent sensitivity that is typical of a HBO derivative to produce a normal (aka enol) emission and an excited-state tautomer (aka keto) emission. These two emission bands of the neutral dyes are discussed in the current paper. The intermolecular proton transfer, i.e., the deprotonation, of a PVHBO results in the third band of the triple emission, which is described in the succeeding paper. The placement of an electron-withdrawing substituent R on the PVHBO scaffold increases the intensity of the keto emission relative to the enol emission in hydrogen-bonding solvents. The R substituents do not significantly alter the wavelengths of the enol and keto emission bands, which are located in the blue and green regions, respectively, of the visible spectrum. The ultrafast time-resolved spectroscopies and quantum chemical calculations offer explanations on how the R group and the solvent affect the enol and keto emission properties (i.e., wavelength, lifetime, fluorescence quantum yield, and relative ratio of their emissions). The key findings include the following: (1) the emission energies of both enol and keto forms are not sensitively dependent on the R substituent and (2) the solvent-engaged enol excited state is quenched more efficiently as the R substituent becomes more electron-withdrawing. A PVHBO acts as a fusion of HBO and stilbenoid that intersect at the hydroxyphenyl moiety. Depending on the solvent and other environmental conditions, PVHBOs may exhibit the ESIPT property of HBO or the substituent-dependent emission of stilbenoid. This paper and the succeeding article provide a photophysical model of PVHBOs to explain the wavelengths and relative abundances of the three emission bands (enol, keto, and anion) that these compounds are able to produce. Judicial selection of the environmental factors may drive the emission of a PVHBO into the spectral regions of blue, green, and, in a couple of cases, orange or red.
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Affiliation(s)
- Quinton J Meisner
- Department of Chemistry and Biochemistry, Florida State University, 95 Chieftan Way, Tallahassee, Florida 32306-4390, United States
| | - Joseph J M Hurley
- Department of Chemistry and Biochemistry, Florida State University, 95 Chieftan Way, Tallahassee, Florida 32306-4390, United States
| | - Peijun Guo
- Center for Nanoscale Materials, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Anna R Blood
- New College of Florida, 5800 Bay Shore Road, Sarasota, Florida 34243, United States
| | - Richard D Schaller
- Center for Nanoscale Materials, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - David J Gosztola
- Center for Nanoscale Materials, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Gary P Wiederrecht
- Center for Nanoscale Materials, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Lei Zhu
- Department of Chemistry and Biochemistry, Florida State University, 95 Chieftan Way, Tallahassee, Florida 32306-4390, United States
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16
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Vaganova TA, Benassi E, Gatilov YV, Chuikov IP, Pishchur DP, Malykhin EV. Polyhalogenated aminobenzonitriles vs. their co-crystals with 18-crown-6: amino group position as a tool to control crystal packing and solid-state fluorescence. CrystEngComm 2022. [DOI: 10.1039/d1ce01469b] [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
Strengthening (para-isomers) or weakening (ortho-isomers) of π-electron aggregation due to the crystal structure rearrangement results in the bathochromic or hypsochromic shift of the fluorescence maximum.
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Affiliation(s)
- Tamara A. Vaganova
- N.N. Vorozhtsov Novosibirsk Institute of Organic Chemistry, Siberian Branch of the Russian Academy of Sciences, 9 Lavrentiev Avenue, 630090 Novosibirsk, Russian Federation
| | - Enrico Benassi
- Novosibirsk State University, 2 Pirogova Avenue, 630090 Novosibirsk, Russian Federation
| | - Yurij V. Gatilov
- N.N. Vorozhtsov Novosibirsk Institute of Organic Chemistry, Siberian Branch of the Russian Academy of Sciences, 9 Lavrentiev Avenue, 630090 Novosibirsk, Russian Federation
| | - Igor P. Chuikov
- N.N. Vorozhtsov Novosibirsk Institute of Organic Chemistry, Siberian Branch of the Russian Academy of Sciences, 9 Lavrentiev Avenue, 630090 Novosibirsk, Russian Federation
| | - Denis P. Pishchur
- Nikolaev Institute of Inorganic Chemistry, Siberian Branch of the Russian Academy of Sciences, 3 Lavrentiev Avenue, 630090 Novosibirsk, Russian Federation
| | - Evgenij V. Malykhin
- N.N. Vorozhtsov Novosibirsk Institute of Organic Chemistry, Siberian Branch of the Russian Academy of Sciences, 9 Lavrentiev Avenue, 630090 Novosibirsk, Russian Federation
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17
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18
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Hwang SH, Kim H, Ryu H, Serdiuk IE, Lee D, Choi TL. Powerful Direct C-H Amidation Polymerization Affords Single-Fluorophore-Based White-Light-Emitting Polysulfonamides by Fine-Tuning Hydrogen Bonds. J Am Chem Soc 2021; 144:1778-1785. [PMID: 34968031 DOI: 10.1021/jacs.1c11100] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
The development of white-light-emitting polymers has been actively pursued because of the importance of such polymers in various applications, such as lighting sources and displays. To generate white-light, numerous research efforts have focused on synthesizing multifluorophore-based random copolymers to effectively cover the entire visible region. However, due to their intrinsic synthetic and structural features, this strategy has limitations in securing color reproducibility and stability. Herein, we report the development of single-fluorophore-based white-light-emitting homopolymers with excellent color reproducibility. A powerful direct C-H amidation polymerization (DCAP) strategy enabled the synthesis of defect-free polysulfonamides that emit white-light via excited-state intramolecular proton-transfer (ESIPT). To gain structural insights for designing such polymers, we conducted detailed model studies by varying the electronic nature of substituents that allow facile tuning of the emission colors. Further analysis revealed precise control of the thermodynamics of the ESIPT process by fine-tuning the strength of the intramolecular hydrogen bond. By applying this design principle to polymerization, we successfully produced a series of well-defined polysulfonamides with single-fluorophore emitting white-light. The resulting polymers emitted consistent fluorescence, regardless of their molecular weights or phases (i.e., solution, powder, or thin film), guaranteeing excellent color reproducibility. With these advantages in hand, we also demonstrated practical use of our DCAP system by fabricating a white-light-emitting coated LED.
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Affiliation(s)
- Soon-Hyeok Hwang
- Department of Chemistry, Seoul National University, Seoul 08826, Korea
| | - Hongsik Kim
- Department of Chemistry, Seoul National University, Seoul 08826, Korea
| | - Hanseul Ryu
- Department of Chemistry, Seoul National University, Seoul 08826, Korea
| | - Illia E Serdiuk
- Faculty of Mathematics, Physics and Informatics, University of Gdańsk, Wita Stwosza 57, 80-308 Gdańsk, Poland
| | - Dongwhan Lee
- Department of Chemistry, Seoul National University, Seoul 08826, Korea
| | - Tae-Lim Choi
- Department of Chemistry, Seoul National University, Seoul 08826, Korea
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19
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Pariat T, Stoerkler T, Diguet C, Laurent AD, Jacquemin D, Ulrich G, Massue J. Dual Solution-/Solid-State Emissive Excited-State Intramolecular Proton Transfer (ESIPT) Dyes: A Combined Experimental and Theoretical Approach. J Org Chem 2021; 86:17606-17619. [PMID: 34846147 DOI: 10.1021/acs.joc.1c01698] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Excited-state intramolecular proton transfer (ESIPT) dyes typically show strong solid-state emission, but faint fluorescence intensity is observed in the solution state owing to detrimental molecular motions. This article investigates the influence of direct (hetero)arylation on the optical properties of 2-(2'-hydroxyphenyl)benzoxazole ESIPT emitters. The synthesis of two series of ESIPT emitters bearing substituted neutral or charged aryl, thiophene, or pyridine rings is reported herein along with full photophysical studies in solution and solid states, demonstrating the dual solution-/solid-state emission behavior. Depending on the nature of substitution, several excited-state dynamics are observed: quantitative or partially frustrated ESIPT process or deprotonation of the excited species. Protonation studies revealed that pyridine substitution triggered a strong increase of quantum yield in the solution state for the protonated species owing to favorable quinoidal stabilization. These attractive features led to the development of a second series of dyes with alkyl or aryl pyridinium moieties showing strong tunable solution/solid fluorescence intensity. For each series, ab initio calculations helped rationalize and ascertain their behavior in the excited state and the nature of the emission observed by the experimental results.
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Affiliation(s)
- Thibault Pariat
- Institut de Chimie et Procédés pour l'Energie, l'Environnement et la Santé (ICPEES), Equipe Chimie Organique pour la Biologie, les Matériaux et l'Optique (COMBO), UMR CNRS 7515, Ecole Européenne de Chimie, Polymères et Matériaux (ECPM), Université de Strasbourg, 25 Rue Becquerel, 67087 Strasbourg Cedex 02, France
| | - Timothée Stoerkler
- Institut de Chimie et Procédés pour l'Energie, l'Environnement et la Santé (ICPEES), Equipe Chimie Organique pour la Biologie, les Matériaux et l'Optique (COMBO), UMR CNRS 7515, Ecole Européenne de Chimie, Polymères et Matériaux (ECPM), Université de Strasbourg, 25 Rue Becquerel, 67087 Strasbourg Cedex 02, France
| | - Clément Diguet
- Laboratoire CEISAM UMR UN-CNRS 6230, Université de Nantes, Nantes F-44000, France
| | - Adèle D Laurent
- Laboratoire CEISAM UMR UN-CNRS 6230, Université de Nantes, Nantes F-44000, France
| | - Denis Jacquemin
- Laboratoire CEISAM UMR UN-CNRS 6230, Université de Nantes, Nantes F-44000, France
| | - Gilles Ulrich
- Institut de Chimie et Procédés pour l'Energie, l'Environnement et la Santé (ICPEES), Equipe Chimie Organique pour la Biologie, les Matériaux et l'Optique (COMBO), UMR CNRS 7515, Ecole Européenne de Chimie, Polymères et Matériaux (ECPM), Université de Strasbourg, 25 Rue Becquerel, 67087 Strasbourg Cedex 02, France
| | - Julien Massue
- Institut de Chimie et Procédés pour l'Energie, l'Environnement et la Santé (ICPEES), Equipe Chimie Organique pour la Biologie, les Matériaux et l'Optique (COMBO), UMR CNRS 7515, Ecole Européenne de Chimie, Polymères et Matériaux (ECPM), Université de Strasbourg, 25 Rue Becquerel, 67087 Strasbourg Cedex 02, France
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20
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Suzuki N, Kubota T, Ando N, Yamaguchi S. Photobase-Driven Excited-State Intramolecular Proton Transfer (ESIPT) in a Strapped π-Electron System. Chemistry 2021; 28:e202103584. [PMID: 34841575 DOI: 10.1002/chem.202103584] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2021] [Indexed: 11/09/2022]
Abstract
We report a new design strategy for an excited-state intramolecular proton transfer (ESIPT) fluorophore that can be used in acidic media. A photobasic pyridine-centered donor-acceptor-donor-type fluorophore is combined with a basic trialkylamine "strap". In the presence of an acid, protonation occurs predominantly at the amine moiety in the ground state. A single-crystal X-ray diffraction analysis confirmed the formation of a pre-organized intramolecular hydrogen-bonded structure between the resulting ammonium moiety and the pyridine ring. Upon excitation, the intramolecular charge-transfer transition increases the basicity of the pyridine moiety in the excited state, resulting in proton transfer from the amine to the pyridine moiety. Consequently, the fluorophore takes on a polymethine-dye character in the ESIPT state, which gives rise to significantly red-shifted emission with an increased fluorescence quantum yield.
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Affiliation(s)
- Naoya Suzuki
- Department of Chemistry, Graduate School of Science, and Integrated Research Consortium on Chemical Sciences (IRCCS), Nagoya University, Furo, Chikusa, Nagoya, 464-8602, Japan
| | - Tomoya Kubota
- Department of Chemistry, Graduate School of Science, and Integrated Research Consortium on Chemical Sciences (IRCCS), Nagoya University, Furo, Chikusa, Nagoya, 464-8602, Japan
| | - Naoki Ando
- Department of Chemistry, Graduate School of Science, and Integrated Research Consortium on Chemical Sciences (IRCCS), Nagoya University, Furo, Chikusa, Nagoya, 464-8602, Japan
| | - Shigehiro Yamaguchi
- Department of Chemistry, Graduate School of Science, and Integrated Research Consortium on Chemical Sciences (IRCCS), Nagoya University, Furo, Chikusa, Nagoya, 464-8602, Japan.,Institute of Transformative Bio-Molecules (WPI-ITbM), Nagoya University, Furo, Chikusa, Nagoya, 464-8601, Japan
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21
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Synthesis and Characterization of White-Light Luminescent End-Capped Polyimides Based on FRET and Excited State Intramolecular Proton Transfer. Polymers (Basel) 2021; 13:polym13224050. [PMID: 34833349 PMCID: PMC8621099 DOI: 10.3390/polym13224050] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2021] [Revised: 11/18/2021] [Accepted: 11/19/2021] [Indexed: 11/17/2022] Open
Abstract
N-cyclohexylphthalimide-substituted trifluoroacetylamino (CF3CONH-) group (3TfAPI), which forms an intramolecular hydrogen bond, was synthesized, and it exhibited a bright yellow fluorescence owing to the excited-state intramolecular proton transfer (ESIPT) in the solution and crystalline states. In addition, CF3CONH-substituted phthalic anhydride (3TfAPA) was synthesized, which was attached to the termini of a blue-fluorescent semi-aromatic polyimide (PI) chain. Owing to the efficient Förster resonance energy transfer (FRET) occurring from the main chain to the termini and the suppression of deprotonation (anion formation) at the 3TfAPA moiety by H2SO4 doping, the resulting PI films display bright white fluorescence. Moreover, the enhancement of the chain rigidity by substituting the diamine moiety results in an increase in the quantum yield of white fluorescence (Φ) by a factor of 1.7, due to the suppression of local molecular motion. This material design strategy is promising for preparing thermally stable white-light fluorescent PIs applicable to solar spectral convertors, displays, and ICT devices.
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22
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Göbel D, Rusch P, Duvinage D, Stauch T, Bigall NC, Nachtsheim BJ. Substitution Effect on 2-(Oxazolinyl)-phenols and 1,2,5-Chalcogenadiazole -Annulated Derivatives: Emission-Color-Tunable, Minimalistic Excited-State Intramolecular Proton Transfer (ESIPT)-Based Luminophores. J Org Chem 2021; 86:14333-14355. [PMID: 34581564 DOI: 10.1021/acs.joc.1c00846] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Minimalistic 2-(oxazolinyl)-phenols substituted with different electron-donating and -withdrawing groups as well as 1,2,5-chalcogenadiazole-annulated derivatives thereof were synthesized and investigated in regard to their emission behavior in solution as well as in the solid state. Depending on the nature of the incorporated substituent and its position, emission efficiencies were increased or diminished, resulting in AIE or ACQ characteristics. Single-crystal analysis revealed J- and H-type packing motifs and a so-far undescribed isolation of ESIPT-based fluorophores in the keto form.
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Affiliation(s)
- Dominik Göbel
- Institute for Organic and Analytical Chemistry, University of Bremen, 28359 Bremen, Germany
| | - Pascal Rusch
- Leibniz Universität Hannover, Institute of Physical Chemistry and Electrochemistry, Callinstraße 3a, D-30167 Hannover, Germany.,Cluster of Excellence PhoenixD (Photonics, Optics, and Engineering - Innovation Across Disciplines), D-30167 Hannover, Germany
| | - Daniel Duvinage
- Institute for Inorganic and Crystallographic Chemistry, University of Bremen, 28359 Bremen, Germany
| | - Tim Stauch
- Institute for Physical and Theoretical Chemistry, University of Bremen, Leobener Straße NW2, D-28359 Bremen, Germany.,Bremen Center for Computational Materials Science, University of Bremen, Am Fallturm 1, D-28359 Bremen, Germany.,MAPEX Center for Materials and Processes, University of Bremen, Bibliothekstraße 1, D-28359 Bremen, Germany
| | - Nadja-C Bigall
- Leibniz Universität Hannover, Institute of Physical Chemistry and Electrochemistry, Callinstraße 3a, D-30167 Hannover, Germany.,Cluster of Excellence PhoenixD (Photonics, Optics, and Engineering - Innovation Across Disciplines), D-30167 Hannover, Germany
| | - Boris J Nachtsheim
- Institute for Organic and Analytical Chemistry, University of Bremen, 28359 Bremen, Germany
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23
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Biesen L, May L, Nirmalananthan‐Budau N, Hoffmann K, Resch‐Genger U, Müller TJJ. Communication of Bichromophore Emission upon Aggregation - Aroyl-S,N-ketene Acetals as Multifunctional Sensor Merocyanines. Chemistry 2021; 27:13426-13434. [PMID: 34170045 PMCID: PMC8518837 DOI: 10.1002/chem.202102052] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2021] [Indexed: 12/13/2022]
Abstract
Aroyl-S,N-ketene acetal-based bichromophores can be readily synthesized in a consecutive three-component synthesis in good to excellent yields by condensation of aroyl chlorides and an N-(p-bromobenzyl) 2-methyl benzothiazolium salt followed by a Suzuki coupling, yielding a library of 31 bichromophoric fluorophores with substitution pattern-tunable emission properties. Varying both chromophores enables different communication pathways between the chromophores, exploiting aggregation-induced emission (AIE) and energy transfer (ET) properties, and thus, furnishing aggregation-based fluorescence switches. Possible applications range from fluorometric analysis of alcoholic beverages to pH sensors.
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Affiliation(s)
- Lukas Biesen
- Institut für Organische Chemie und Makromolekulare ChemieHeinrich-Heine-Universität DüsseldorfUniversitätsstraße 140225DüsseldorfGermany
| | - Lars May
- Institut für Organische Chemie und Makromolekulare ChemieHeinrich-Heine-Universität DüsseldorfUniversitätsstraße 140225DüsseldorfGermany
| | - Nithiya Nirmalananthan‐Budau
- Division BiophotonicsBundesanstalt für Materialforschung und -prüfung (BAM), Department 1Richard-Willstätter-Straße 1112489BerlinGermany
| | - Katrin Hoffmann
- Division BiophotonicsBundesanstalt für Materialforschung und -prüfung (BAM), Department 1Richard-Willstätter-Straße 1112489BerlinGermany
| | - Ute Resch‐Genger
- Division BiophotonicsBundesanstalt für Materialforschung und -prüfung (BAM), Department 1Richard-Willstätter-Straße 1112489BerlinGermany
| | - Thomas J. J. Müller
- Institut für Organische Chemie und Makromolekulare ChemieHeinrich-Heine-Universität DüsseldorfUniversitätsstraße 140225DüsseldorfGermany
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24
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Guido CA, Chrayteh A, Scalmani G, Mennucci B, Jacquemin D. Simple Protocol for Capturing Both Linear-Response and State-Specific Effects in Excited-State Calculations with Continuum Solvation Models. J Chem Theory Comput 2021; 17:5155-5164. [PMID: 34224244 DOI: 10.1021/acs.jctc.1c00490] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We present an effective computational protocol (cLR2) to describe both solvatochromism and fluorosolvatochromism. This protocol, which couples the polarizable continuum model to time-dependent density functional theory, simultaneously accounts for both linear-response and state-specific solvation effects. A series of test cases, including solvatochromic and fluorosolvatochromic compounds and excited-state intramolecular proton transfers, are used to highlight that cLR2 is especially beneficial for modeling bright excitations possessing a significant charge-transfer character, as well as cases in which an accurate balance between states of various polarities should be restored.
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Affiliation(s)
- Ciro A Guido
- Université de Nantes, CNRS, CEISAM UMR 6230, F-44000 Nantes, France.,Dipartimento di Scienze Chimiche, Università di Padova, Via F. Marzolo 1, I-35131 Padova, Italy
| | - Amara Chrayteh
- Université de Nantes, CNRS, CEISAM UMR 6230, F-44000 Nantes, France
| | - Giovanni Scalmani
- Gaussian Inc., 340 Quinnipiac St Bldg 40, Wallingford, Connecticut 06492, United States
| | - Benedetta Mennucci
- Dipartimento di Chimica e Chimica Industriale, University of Pisa, Via Moruzzi 3, 56124 Pisa, Italy
| | - Denis Jacquemin
- Université de Nantes, CNRS, CEISAM UMR 6230, F-44000 Nantes, France
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25
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Fery-Forgues S, Vanucci-Bacqué C. Recent Trends in the Design, Synthesis, Spectroscopic Behavior, and Applications of Benzazole-Based Molecules with Solid-State Luminescence Enhancement Properties. Top Curr Chem (Cham) 2021; 379:32. [PMID: 34342718 DOI: 10.1007/s41061-021-00344-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2021] [Accepted: 07/10/2021] [Indexed: 02/05/2023]
Abstract
Molecules that exhibit solid-state luminescence enhancement, i.e. the rare property to be more strongly emissive in the solid state than in solution, find an increasing number of applications in the fields of optoelectronic and nanophotonic devices, sensors, security papers, imaging, and theranostics. Benzazole (BZ) heterocycles are of particular value in this context. The simple enlargement of their π-electron system using a -C=C-Ar or -N=C-Ar moiety is enough for intrinsic solid-state luminescence enhancement (SLE) properties to appear. Their association with a variety of polyaromatic motifs leads to SLE-active molecules that frequently display attractive electroluminescent properties and are sensitive to mechanical stimuli. The excited-state intramolecular proton transfer (ESIPT) process that takes place in some hydroxy derivatives reinforces the SLE effect and enables the development of new sensors based on a protection/deprotection strategy. BZ may also be incorporated into frameworks that are prototypical aggregation-induced enhancement (AIE) luminogens, such as the popular tetraphenylethene (TPE), leading to materials with excellent optical and electroluminescent performance. This review encompasses the various ways to use BZ units in SLE systems. It underlines the significant progresses recently made in the understanding of the photophysical mechanisms involved. A brief overview of the synthesis shows that BZ units are robust building blocks, easily incorporated into a variety of structures. Generally speaking, we try to show how these small heterocycles may offer advantages for the design of increasingly efficient luminescent materials.
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Affiliation(s)
- Suzanne Fery-Forgues
- SPCMIB, CNRS UMR 5068, Université de Toulouse III Paul Sabatier, 118 route de Narbonne, 31062, Toulouse cedex 9, France.
| | - Corinne Vanucci-Bacqué
- SPCMIB, CNRS UMR 5068, Université de Toulouse III Paul Sabatier, 118 route de Narbonne, 31062, Toulouse cedex 9, France
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26
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Stoerkler T, Frath D, Jacquemin D, Massue J, Ulrich G. Dual‐State Emissive π‐Extended Salicylaldehyde Fluorophores: Synthesis, Photophysical Properties and First‐Principle Calculations. European J Org Chem 2021. [DOI: 10.1002/ejoc.202100650] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Timothée Stoerkler
- Institut de Chimie et Procédés pour l'Energie, l'Environnement et la Santé (ICPEES) Equipe Chimie Organique pour la Biologie, les Matériaux et l'Optique (COMBO) UMR CNRS 7515, Ecole Européenne de Chimie, Polymères et Matériaux (ECPM) 25 Rue Becquerel 67087 Strasbourg Cedex 02 France
| | - Denis Frath
- Institut de Chimie et Procédés pour l'Energie, l'Environnement et la Santé (ICPEES) Equipe Chimie Organique pour la Biologie, les Matériaux et l'Optique (COMBO) UMR CNRS 7515, Ecole Européenne de Chimie, Polymères et Matériaux (ECPM) 25 Rue Becquerel 67087 Strasbourg Cedex 02 France
- Université de Lyon, ENS de Lyon, CNRS UMR 5182 Laboratoire de Chimie 69342 Lyon France
| | | | - Julien Massue
- Institut de Chimie et Procédés pour l'Energie, l'Environnement et la Santé (ICPEES) Equipe Chimie Organique pour la Biologie, les Matériaux et l'Optique (COMBO) UMR CNRS 7515, Ecole Européenne de Chimie, Polymères et Matériaux (ECPM) 25 Rue Becquerel 67087 Strasbourg Cedex 02 France
| | - Gilles Ulrich
- Institut de Chimie et Procédés pour l'Energie, l'Environnement et la Santé (ICPEES) Equipe Chimie Organique pour la Biologie, les Matériaux et l'Optique (COMBO) UMR CNRS 7515, Ecole Européenne de Chimie, Polymères et Matériaux (ECPM) 25 Rue Becquerel 67087 Strasbourg Cedex 02 France
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27
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Pariat T, Munch M, Durko-Maciag M, Mysliwiec J, Retailleau P, Vérité PM, Jacquemin D, Massue J, Ulrich G. Impact of Heteroatom Substitution on Dual-State Emissive Rigidified 2-(2'-hydroxyphenyl)benzazole Dyes: Towards Ultra-Bright ESIPT Fluorophores*. Chemistry 2021; 27:3483-3495. [PMID: 33191573 DOI: 10.1002/chem.202004767] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2020] [Indexed: 01/09/2023]
Abstract
2-(2'-Hydroxyphenyl)benzazole (HBX) fluorophores are well-known excited-state intramolecular proton transfer (ESIPT) emitters largely studied for their synthetic versatility, photostability, strong solid-state fluorescence and ability to engineer dual emission, thus paving the way to applications as white emitters, ratiometric sensors, and cryptographic dyes. However, they are heavily quenched in solution, due to efficient non-radiative pathways taking place as a consequence of the proton transfer in the excited-state. In this contribution, the nature of the heteroring constitutive of these rigidified HBX dyes was modified and we demonstrate that this simple structural modification triggers major optical changes in terms of emission color, dual emission engineering, and importantly, fluorescent quantum yield. Investigation of the photophysical properties in solution and in the solid state of a series of ethynyl-TIPS extended HBX fluorophores, along with ab initio calculations demonstrate the very promising abilities of these dyes to act as bright dual-state emitters, in both solution (even in protic environments) and solid state.
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Affiliation(s)
- Thibault Pariat
- Institut de Chimie et Procédés pour l'Energie, l'Environnement et la Santé (ICPEES), UMR CNRS 7515, Ecole Européenne de Chimie, Polymères et Matériaux (ECPM), 25 Rue Becquerel, 67087, Strasbourg Cedex 02, France
| | - Maxime Munch
- Institut de Chimie et Procédés pour l'Energie, l'Environnement et la Santé (ICPEES), UMR CNRS 7515, Ecole Européenne de Chimie, Polymères et Matériaux (ECPM), 25 Rue Becquerel, 67087, Strasbourg Cedex 02, France
| | - Martyna Durko-Maciag
- Institut de Chimie et Procédés pour l'Energie, l'Environnement et la Santé (ICPEES), UMR CNRS 7515, Ecole Européenne de Chimie, Polymères et Matériaux (ECPM), 25 Rue Becquerel, 67087, Strasbourg Cedex 02, France.,Advanced Materials Engineering and Modeling Group, Wroclaw University of Science and Technology, Wybrzeze Wyspianskiego 27, 50370, Wroclaw, Poland
| | - Jaroslaw Mysliwiec
- Advanced Materials Engineering and Modeling Group, Wroclaw University of Science and Technology, Wybrzeze Wyspianskiego 27, 50370, Wroclaw, Poland
| | - Pascal Retailleau
- Laboratoire de Cristallochimie, ICSN-CNRS, 1 Avenue de la Terrasse, Bât. 27, 91198, Gif-sur-Yvette Cedex, France
| | - Pauline M Vérité
- CEISAM Lab-UMR 6230-CNRS and University of Nantes, 2 Rue de la Houssinière, 44322, Nantes, France
| | - Denis Jacquemin
- CEISAM Lab-UMR 6230-CNRS and University of Nantes, 2 Rue de la Houssinière, 44322, Nantes, France
| | - Julien Massue
- Institut de Chimie et Procédés pour l'Energie, l'Environnement et la Santé (ICPEES), UMR CNRS 7515, Ecole Européenne de Chimie, Polymères et Matériaux (ECPM), 25 Rue Becquerel, 67087, Strasbourg Cedex 02, France
| | - Gilles Ulrich
- Institut de Chimie et Procédés pour l'Energie, l'Environnement et la Santé (ICPEES), UMR CNRS 7515, Ecole Européenne de Chimie, Polymères et Matériaux (ECPM), 25 Rue Becquerel, 67087, Strasbourg Cedex 02, France
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Göbel D, Rusch P, Duvinage D, Bigall NC, Nachtsheim BJ. Emission color-tunable oxazol(in)yl-substituted excited-state intramolecular proton transfer (ESIPT)-based luminophores. Chem Commun (Camb) 2020; 56:15430-15433. [PMID: 33231590 PMCID: PMC8517962 DOI: 10.1039/d0cc05780k] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2020] [Accepted: 11/10/2020] [Indexed: 12/16/2022]
Abstract
Oxazolinyl- and arylchalcogenazolyl-substituted hydroxyfluorenes exhibiting excited-state intramolecular proton transfer (ESIPT) are described as potent and highly modular luminophores. Emission color tuning was achieved by varying the π-expansion and the insertion of different chalcogen atoms.
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Affiliation(s)
- Dominik Göbel
- Institute for Organic and Analytical Chemistry, University of Bremen, Leobener Straße NW2, D-28359 Bremen, Germany.
| | - Pascal Rusch
- Leibniz University Hannover, Institute of Physical Chemistry and Electrochemistry, Callinstraße 3a, D-30167 Hannover, Germany.
- Cluster of Excellence PhoenixD (Photonics, Optics, and Engineering - Innovation Across Disciplines), Hannover, Germany
| | - Daniel Duvinage
- Institute for Inorganic and Crystallographic Chemistry, University of Bremen, Leobener Straße NW2, D-28359 Bremen, Germany
| | - Nadja C Bigall
- Leibniz University Hannover, Institute of Physical Chemistry and Electrochemistry, Callinstraße 3a, D-30167 Hannover, Germany.
- Cluster of Excellence PhoenixD (Photonics, Optics, and Engineering - Innovation Across Disciplines), Hannover, Germany
| | - Boris J Nachtsheim
- Institute for Organic and Analytical Chemistry, University of Bremen, Leobener Straße NW2, D-28359 Bremen, Germany.
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29
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Fecková M, Kalis IK, Roisnel T, le Poul P, Pytela O, Klikar M, Robin-le Guen F, Bureš F, Fakis M, Achelle S. Photophysics of 9,9-Dimethylacridan-Substituted Phenylstyrylpyrimidines Exhibiting Long-Lived Intramolecular Charge-Transfer Fluorescence and Aggregation-Induced Emission Characteristics. Chemistry 2020; 27:1145-1159. [PMID: 33016475 DOI: 10.1002/chem.202004328] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2020] [Indexed: 01/23/2023]
Abstract
Six pyrimidine-based push-pull systems substituted at positions C2 and C4/6 with phenylacridan and styryl moieties, employing methoxy or N,N-diphenylamino donors, have been designed and synthesized through cross-coupling and Knoevenagel reactions. X-ray analysis confirmed that the molecular structure featured the acridan moiety arranged perpendicularly to the residual π system. Photophysical studies revealed significant differences between the methoxy and N,N-diphenylamino chromophores. Solvatochromic studies revealed that the methoxy derivatives showed dual emission in polar solvents. Time-resolved spectroscopy revealed that the higher energy band involved very fast (<80 ps) fluorescence, whereas the lower energy one included long components (≈30 ns) due to long-lived intramolecular charge-transfer fluorescence. In contrast to N,N-diphenylamino chromophores, the methoxy derivatives also showed aggregation-induced emission in mixtures of THF/water, as well as dual emission in thin films, covering almost the whole visible spectrum with corresponding chromaticity coordinates not far from that of pure white light. These properties render the methoxy derivatives as very promising organic materials for white organic light-emitting diodes.
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Affiliation(s)
- Michaela Fecková
- Institut des Sciences Chimique de Rennes, UMR 6226, Univ. Rennes, CNRS, 35000, Rennes, France.,Institute of Organic Chemistry and Technology, Faculty of Chemical Technology, University of Pardubice, Studenská 573, 53210, Pardubice, Czech Republic
| | | | - Thierry Roisnel
- Institut des Sciences Chimique de Rennes, UMR 6226, Univ. Rennes, CNRS, 35000, Rennes, France
| | - Pascal le Poul
- Institut des Sciences Chimique de Rennes, UMR 6226, Univ. Rennes, CNRS, 35000, Rennes, France
| | - Oldřich Pytela
- Institute of Organic Chemistry and Technology, Faculty of Chemical Technology, University of Pardubice, Studenská 573, 53210, Pardubice, Czech Republic
| | - Milan Klikar
- Institute of Organic Chemistry and Technology, Faculty of Chemical Technology, University of Pardubice, Studenská 573, 53210, Pardubice, Czech Republic
| | - Françoise Robin-le Guen
- Institut des Sciences Chimique de Rennes, UMR 6226, Univ. Rennes, CNRS, 35000, Rennes, France
| | - Filip Bureš
- Institute of Organic Chemistry and Technology, Faculty of Chemical Technology, University of Pardubice, Studenská 573, 53210, Pardubice, Czech Republic
| | - Mihalis Fakis
- Department of Physics, University of Patras, 26504, Patras, Greece
| | - Sylvain Achelle
- Institut des Sciences Chimique de Rennes, UMR 6226, Univ. Rennes, CNRS, 35000, Rennes, France
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30
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Chrayteh A, Ewels CP, Jacquemin D. TD-DFT and CC2 insights into the dual-emissive behaviour of 2-(2'-hydroxyphenyl)oxazoles core and their derivatives. Phys Chem Chem Phys 2020; 22:25066-25074. [PMID: 33119009 DOI: 10.1039/d0cp04520a] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Two efficient excited state intramolecular proton transfer (ESIPT) dyes based on the hydroxyphenyl-oxazole core and containing one or two triphenylamine donor groups are explored with theoretical tools. These compounds are known to show clear experimental dual emission behaviour, leading to nearly pure white-light emission for one derivative. To probe the excited state properties, we use both Time Dependent Density Functional Theory (TD-DFT) and post Hartree-Fock methods [ADC(2) and CC2] coupled to different solvent models to describe polarisation effects. After validating our theoretical protocol on the two known systems, we design 14 new derivatives with different substitution patterns to quantify the impact of electron accepting and donating groups on the fluorescence spectrum and the ESIPT mechanism. We show that the selected protocol delivers accurate spectroscopic values for the two experimentally-characterised structures, and more importantly, that the relative stabilisation of the keto tautomer depends on the substitution side. Adding donor or acceptor groups to the ESIPT donor moiety favours the formation of the keto form, whereas when placed on the ESIPT accepting side, they tend to preclude ESIPT. Moreover, combining two donor or acceptor substituents generally results in similar ESIPT behaviour as single substitution on one of the two sides: simple additive rules do not apply.
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Affiliation(s)
- Amara Chrayteh
- Laboratoire CEISAM - UMR 6230 - CNRS - Université de Nantes, Nantes, France.
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31
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Enhanced solid-state photoluminescence and fluorescence spectral behaviors for an ESIPT molecule: An experimental and theoretical investigation. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2020.114176] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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32
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Czernel G, Budziak I, Oniszczuk A, Karcz D, Pustuła K, Górecki A, Matwijczuk A, Gładyszewska B, Gagoś M, Niewiadomy A, Matwijczuk A. ESIPT-Related Origin of Dual Fluorescence in the Selected Model 1,3,4-Thiadiazole Derivatives. Molecules 2020; 25:molecules25184168. [PMID: 32933032 PMCID: PMC7570705 DOI: 10.3390/molecules25184168] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2020] [Revised: 09/08/2020] [Accepted: 09/09/2020] [Indexed: 11/16/2022] Open
Abstract
In our previous work, we discussed the emergence of the dual fluorescence phenomenon in selected compounds from the group of 1,3,4-thiadiazoles. The results obtained in a number of experimental studies, supported by [TD]DFT calculations, clearly indicated that the phenomenon of dual fluorescence stemmed from an overlap of several factors, including the correct conformation of the analyzed molecule and, very significantly in this context, aggregation effects. Where those two conditions were met, we could observe the phenomenon of intermolecular charge transfer (CT) and the emergence of electronic states responsible for long wave emissions. However, in light of the new studies presented in this paper, we were able, for the first time, to provide a specific theory for the effect of dual fluorescence observed in the analyzed group of 1,3,4-thiadiazoles. We present the results of spectroscopic measurements conducted for two selected analogues from the 1,3,4-thiadiazole group, both in polar and non-polar solvents, which clearly evidence (as we have already suspected in the past, albeit have not shown in publications to date) the possibility of processes related to emission from the tautomer formed in the process of excited state intramolecular proton transfer, which is responsible for the long-wavelength emissions observed in the selected analogues. The presented results obtained with the use of UV-Vis, fluorescence (stationary and time-resolved), FTIR, and Raman spectroscopy, as well as from calculations of dipole moment changes between the ground and excited state with the use of two derivatives with different structures of the resorcylic system, corroborated our standing hypothesis. At the same time, they excluded the presence of ground state keto forms of the analyzed analogues unless necessitated by the structure of the molecule itself. In this case, aggregation factors enhance the observed effects related to the dual fluorescence of the analyzed compounds (by way of AIE-aggregated induced emissions).
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Affiliation(s)
- Grzegorz Czernel
- Department of Biophysics, University of Life Sciences in Lublin, Akademicka 13, 20-950 Lublin, Poland; (G.C.); (A.M.); (B.G.)
| | - Iwona Budziak
- Department of Chemistry, University of Life Sciences in Lublin, Akademicka 15, 20-950 Lublin, Poland;
| | - Anna Oniszczuk
- Department of Inorganic Chemistry, Medical University in Lublin, 20-059 Lublin, Poland
- Correspondence: (A.O.); (D.K.); (A.M.); Tel.: +48-814-456-937 (A.M.); Fax: +48-814-456-684 (A.M.)
| | - Dariusz Karcz
- Department of Analytical Chemistry (C1), Faculty of Chemical Engineering and Technology, Cracow University of Technology, Warszawska 24, 31-155 Cracow, Poland
- Correspondence: (A.O.); (D.K.); (A.M.); Tel.: +48-814-456-937 (A.M.); Fax: +48-814-456-684 (A.M.)
| | - Katarzyna Pustuła
- Department of Theoretical Chemistry, Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387 Kraków, Poland;
| | - Andrzej Górecki
- Department of Physical Biochemistry, Faculty of Biochemistry, Biophysics and Biotechnology of the Jagiellonian University, Gronostajowa 7, 30-387 Kraków, Poland;
| | - Alicja Matwijczuk
- Department of Biophysics, University of Life Sciences in Lublin, Akademicka 13, 20-950 Lublin, Poland; (G.C.); (A.M.); (B.G.)
| | - Bożena Gładyszewska
- Department of Biophysics, University of Life Sciences in Lublin, Akademicka 13, 20-950 Lublin, Poland; (G.C.); (A.M.); (B.G.)
| | - Mariusz Gagoś
- Department of Cell Biology, Institute of Biology and Biochemistry, Maria Curie-Skłodowska University, Akademicka 19, 20-033 Lublin, Poland;
| | - Andrzej Niewiadomy
- Institute of Industrial Organic Chemistry, Annopol 6, 03-236 Warsaw, Poland;
| | - Arkadiusz Matwijczuk
- Department of Biophysics, University of Life Sciences in Lublin, Akademicka 13, 20-950 Lublin, Poland; (G.C.); (A.M.); (B.G.)
- Correspondence: (A.O.); (D.K.); (A.M.); Tel.: +48-814-456-937 (A.M.); Fax: +48-814-456-684 (A.M.)
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Massue J, Ulrich G, Monti F, Barbieri A. Phosphorescent Cyclometalated Iridium(III) Complexes Bearing Ethynyl‐Extended 2‐(2'‐Hydroxyphenyl) Benzoxazole Ancillary Ligands. Eur J Inorg Chem 2020. [DOI: 10.1002/ejic.202000114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Julien Massue
- Institut de Chimie et Procédés pour l'Energie l'Environnement et la Santé (ICPEES), UMR CNRS 7515 Ecole Européenne de Chimie, Polymères et Matériaux (ECPM) 25 Rue Becquerel 67087 Strasbourg Cedex 02 France
| | - Gilles Ulrich
- Institut de Chimie et Procédés pour l'Energie l'Environnement et la Santé (ICPEES), UMR CNRS 7515 Ecole Européenne de Chimie, Polymères et Matériaux (ECPM) 25 Rue Becquerel 67087 Strasbourg Cedex 02 France
| | - Filippo Monti
- Istituto per la Sintesi Organica e la Fotoreattività (ISOF) l'Environnement et la Santé (ICPEES), UMR CNRS 7515 Consiglio Nazionale delle Ricerche (CNR) Via Gobetti 101 40129 Bologna Italy
| | - Andrea Barbieri
- Istituto per la Sintesi Organica e la Fotoreattività (ISOF) l'Environnement et la Santé (ICPEES), UMR CNRS 7515 Consiglio Nazionale delle Ricerche (CNR) Via Gobetti 101 40129 Bologna Italy
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34
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Chrayteh A, Ewels C, Jacquemin D. Dual fluorescence in strap ESIPT systems: a theoretical study. Phys Chem Chem Phys 2020; 22:854-863. [PMID: 31840734 DOI: 10.1039/c9cp06261k] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Alkylamine-strapped chromophores based on a dithienylpyrrole core, and in which the Excited State Intramolecular Proton Transfer (ESIPT) process yields a zwitterionic structure rather than a keto tautomer have been reported recently (Suzuki et al., Angew. Chem. Int. Ed., 2014, 53, 8231), and are known to exhibit large Stokes shifts. Using Time-Dependent Density Functional Theory (TD-DFT) we investigate the ESIPT mechanism in this family of chromophores considering various substituents and two solvents (cyclohexane and acetone). In order to model the solvent effects, three polarisation models have been applied: the linear response (LR), the corrected linear-response (cLR), and the combination of these two formalisms (LR + cLR). The selected protocol is shown to be effective for a series of compounds with known experimental behaviors, and is then applied to novel derivatives with various donor and acceptor groups and heteroatoms. We determine the absorption and emission wavelengths as well as the energies of the different states that play a role in the ESIPT process. We show that the introduction of electron-withdrawing and electron-donating groups plays an important role in achieving redshifted emission from the ESIPT state.
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Affiliation(s)
- Amara Chrayteh
- Laboratoire CEISAM - UMR CNRS 6230, Université de Nantes, 2 Rue de la Houssinière, BP 92208, 44322 Nantes Cedex 3, France.
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35
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Denißen M, Hannen R, Itskalov D, Biesen L, Nirmalananthan-Budau N, Hoffmann K, Reiss GJ, Resch-Genger U, Müller TJJ. One-pot synthesis of a white-light emissive bichromophore operated by aggregation-induced dual emission (AIDE) and partial energy transfer. Chem Commun (Camb) 2020; 56:7407-7410. [DOI: 10.1039/d0cc03451g] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Consecutive four-component insertion–alkynylation–amination–Suzuki sequence furnishes bichromophores that emit white light upon aggregation-induced dual emission (AIDE) operating by partial energy transfer between the constituting chromophores.
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Affiliation(s)
- Melanie Denißen
- Institut für Organische Chemie und Makromolekulare Chemie
- Heinrich-Heine-Universität Düsseldorf
- D-40225 Düsseldorf
- Germany
| | - Ricarda Hannen
- Institut für Organische Chemie und Makromolekulare Chemie
- Heinrich-Heine-Universität Düsseldorf
- D-40225 Düsseldorf
- Germany
| | - Dana Itskalov
- Institut für Organische Chemie und Makromolekulare Chemie
- Heinrich-Heine-Universität Düsseldorf
- D-40225 Düsseldorf
- Germany
| | - Lukas Biesen
- Institut für Organische Chemie und Makromolekulare Chemie
- Heinrich-Heine-Universität Düsseldorf
- D-40225 Düsseldorf
- Germany
| | | | - Katrin Hoffmann
- Division Biophotonics
- Bundesanstalt für Materialforschung und -prüfung (BAM)
- Department 1
- D-12489 Berlin
- Germany
| | - Guido J. Reiss
- Institut für Anorganische Chemie und Strukturchemie
- Heinrich-Heine-Universität Düsseldorf
- D-40225 Düsseldorf
- Germany
| | - Ute Resch-Genger
- Division Biophotonics
- Bundesanstalt für Materialforschung und -prüfung (BAM)
- Department 1
- D-12489 Berlin
- Germany
| | - Thomas J. J. Müller
- Institut für Organische Chemie und Makromolekulare Chemie
- Heinrich-Heine-Universität Düsseldorf
- D-40225 Düsseldorf
- Germany
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36
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Yang G, Jin X, Chen K, Yang D. Uncovering the excited state trends and ESIPT mechanism for 2-(hydroxy-3-dimethyl-phenyl)-benzooxazole-6-carboxylicacid. Chem Phys Lett 2019. [DOI: 10.1016/j.cplett.2019.136815] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
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37
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Alam P, Climent C, Alemany P, Laskar IR. “Aggregation-induced emission” of transition metal compounds: Design, mechanistic insights, and applications. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY C-PHOTOCHEMISTRY REVIEWS 2019. [DOI: 10.1016/j.jphotochemrev.2019.100317] [Citation(s) in RCA: 53] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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38
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Mori T, Yoshigoe Y, Kuninobu Y. Control of Multicolor and White Emission by Adjusting the Equilibrium between Fluorophores, Lewis Acids, and Their Complexes in Polymers. Angew Chem Int Ed Engl 2019; 58:14457-14461. [DOI: 10.1002/anie.201903408] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2019] [Revised: 08/05/2019] [Indexed: 12/13/2022]
Affiliation(s)
- Toshiaki Mori
- Department of Molecular and Material Sciences Interdisciplinary Graduate School of Engineering Sciences Kyushu University 6-1 Kasugakoen, Kasuga-shi Fukuoka 816-8580 Japan
| | - Yusuke Yoshigoe
- Institute for Materials Chemistry and Engineering Kyushu University 6-1 Kasugakoen, Kasuga-shi Fukuoka 816-8580 Japan
| | - Yoichiro Kuninobu
- Institute for Materials Chemistry and Engineering Kyushu University 6-1 Kasugakoen, Kasuga-shi Fukuoka 816-8580 Japan
- Department of Molecular and Material Sciences Interdisciplinary Graduate School of Engineering Sciences Kyushu University 6-1 Kasugakoen, Kasuga-shi Fukuoka 816-8580 Japan
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39
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Mori T, Yoshigoe Y, Kuninobu Y. Control of Multicolor and White Emission by Adjusting the Equilibrium between Fluorophores, Lewis Acids, and Their Complexes in Polymers. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201903408] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Toshiaki Mori
- Department of Molecular and Material Sciences Interdisciplinary Graduate School of Engineering Sciences Kyushu University 6-1 Kasugakoen, Kasuga-shi Fukuoka 816-8580 Japan
| | - Yusuke Yoshigoe
- Institute for Materials Chemistry and Engineering Kyushu University 6-1 Kasugakoen, Kasuga-shi Fukuoka 816-8580 Japan
| | - Yoichiro Kuninobu
- Institute for Materials Chemistry and Engineering Kyushu University 6-1 Kasugakoen, Kasuga-shi Fukuoka 816-8580 Japan
- Department of Molecular and Material Sciences Interdisciplinary Graduate School of Engineering Sciences Kyushu University 6-1 Kasugakoen, Kasuga-shi Fukuoka 816-8580 Japan
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40
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Maulén B, Echeverri A, Gómez T, Fuentealba P, Cárdenas C. Electron Localization Function in Excited States: The Case of the Ultrafast Proton Transfer of the Salicylidene Methylamine. J Chem Theory Comput 2019; 15:5532-5542. [DOI: 10.1021/acs.jctc.9b00691] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Boris Maulén
- Departamento de Física, Facultad de Ciencias, Universidad de Chile, Casilla 653, Santiago, Chile
| | - Andrea Echeverri
- Departamento de Física, Facultad de Ciencias, Universidad de Chile, Casilla 653, Santiago, Chile
| | - Tatiana Gómez
- Instituto de Ciencias Químicas Aplicadas, Theoretical and Computational Chemistry Center, Facultad de Ingeniería, Universidad Autónoma de Chile, Av. El Llano Subercaseaux 2801, San Miguel, Santiago, Chile
| | - Patricio Fuentealba
- Departamento de Física, Facultad de Ciencias, Universidad de Chile, Casilla 653, Santiago, Chile
- Centro para el Desarrollo de la Nanociencia y la Nanotecnología (CEDENNA), Avda. Ecuador 3493, Santiago 9170124, Chile
| | - Carlos Cárdenas
- Departamento de Física, Facultad de Ciencias, Universidad de Chile, Casilla 653, Santiago, Chile
- Centro para el Desarrollo de la Nanociencia y la Nanotecnología (CEDENNA), Avda. Ecuador 3493, Santiago 9170124, Chile
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41
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Muhamad Sarih N, Myers P, Slater A, Slater B, Abdullah Z, Tajuddin HA, Maher S. White Light Emission from a Simple Mixture of Fluorescent Organic Compounds. Sci Rep 2019; 9:11834. [PMID: 31413269 PMCID: PMC6694174 DOI: 10.1038/s41598-019-47847-5] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2019] [Accepted: 07/18/2019] [Indexed: 11/18/2022] Open
Abstract
Three fluorescent organic compounds—furocoumarin (FC), dansyl aniline (DA), and 7-hydroxycoumarin-3-carboxylic acid (CC)—are mixed to produce almost pure white light emission (WLE). This novel mixture is immobilised in silica aerogel and applied as a coating to a UV LED to demonstrate its applicability as a low-cost, organic coating for WLE via simultaneous emission. In ethanol solution and when immobilised in silica aerogel, the mixture exhibits a Commission Internationale d’Eclairage (CIE) chromaticity index of (0.27, 0.33). It was observed that a broadband and simultaneous emission involving coumarin carboxylic acid, furocoumarin and dansyl aniline played a vital role in obtaining a CIE index close to that of pure white light.
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Affiliation(s)
- Norfatirah Muhamad Sarih
- Department of Electrical Engineering and Electronics, University of Liverpool, Brownlow Hill, Liverpool, L69 3GJ, UK.,Department of Chemistry, Faculty of Science, University of Malaya, 50603, Kuala Lumpur, Malaysia
| | - Peter Myers
- Materials Innovation Factory, Department of Chemistry, University of Liverpool, Liverpool, L7 3NY, UK
| | - Anna Slater
- Materials Innovation Factory, Department of Chemistry, University of Liverpool, Liverpool, L7 3NY, UK
| | - Ben Slater
- Materials Innovation Factory, Department of Chemistry, University of Liverpool, Liverpool, L7 3NY, UK
| | - Zanariah Abdullah
- Department of Chemistry, Faculty of Science, University of Malaya, 50603, Kuala Lumpur, Malaysia
| | - Hairul Anuar Tajuddin
- Department of Chemistry, Faculty of Science, University of Malaya, 50603, Kuala Lumpur, Malaysia
| | - Simon Maher
- Department of Electrical Engineering and Electronics, University of Liverpool, Brownlow Hill, Liverpool, L69 3GJ, UK.
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42
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Natural Born Laser Dyes: Excited-State Intramolecular Proton Transfer (ESIPT) Emitters and Their Use in Random Lasing Studies. NANOMATERIALS 2019; 9:nano9081093. [PMID: 31366091 PMCID: PMC6723810 DOI: 10.3390/nano9081093] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/27/2019] [Revised: 07/21/2019] [Accepted: 07/25/2019] [Indexed: 01/10/2023]
Abstract
A series of five excited-state intramolecular proton transfer (ESIPT) emitters based on a 2-(2′-hydroxyphenyl) benzoxazole (HBO) scaffold, functionalized with a mono-or bis-(trialkylsilyl) acetylene extended spacer are presented. Investigation of their photophysical properties in solution and in the solid-state in different matrix, along with ab initio calculations gave useful insights into their optical behavior. Random lasing studies were conducted on a series of PMMA doped thin films, showing the presence of stimulated emission above the threshold of pumping energy density (ρth ≈ 0.5–2.6 mJ cm−2). In this work, the similarity of four level laser systems is discussed in light of the ESIPT photocycle.
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43
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Ebina M, Kondo Y, Iwasa T, Taketsugu T. Low-Lying Excited States of hqxcH and Zn-hqxc Complex: Toward Understanding Intramolecular Proton Transfer Emission. Inorg Chem 2019; 58:4686-4698. [PMID: 30860367 DOI: 10.1021/acs.inorgchem.9b00410] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Excited state intramolecular proton transfer (ESIPT) has been a topic of interest due to its potential to lead to multiple emissions. Although many organic molecules showing ESIPT emission are already known, studies on metal complexes showing ESIPT and their related theoretical understandings are very limited. In this study, we focus on [Zn(hqxc)2(DMSO)2] (Zn-hqxc: hqxc = 3-hydroxy-2-quinoxalinecarboxylate, DMSO = dimethyl sulfoxide), which shows ESIPT emission in the solid state, even though the hqxcH ligand does not show ESIPT emission. To gain insights into the role of the zinc atom and the emission mechanisms, we examined excited states of free hqxcH and the Zn-hqxc complex using time-dependent density functional theory calculations. From the results, it was shown that the zinc atom triggers a structural change of the hqxcH ligand from the lactam form (3,4-dihydro-3-oxo-2-quinoxalinecarboxylic acid) to the enol form (3-hydroxy-2-quinoxalinecarboxylic acid), where the latter form has several stable excited states. Several stable geometries were found for singlet and triplet excited states, suggesting that emissions for the Zn-hqxc complex can be both phosphorescence and fluorescence caused by the enol-enol, keto-keto, and keto-enol forms of the two hqcx ligands in the complex. We found that the photophysical properties of the Zn-hqxc complex are dominated by the ligand due to the filled d10 of Zn(II). The presented results suggest that, to design new ESIPT metal complexes, one possible approach is to combine a metal atom showing ligand centered emission and a ligand that has separate ESIPT and coordination sites.
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Affiliation(s)
- Masanori Ebina
- Graduate School of Chemical Sciences and Engineering , Hokkaido University , Sapporo 060-0810 , Japan
| | - Yusuke Kondo
- Elements Strategy Initiative for Catalysts and Batteries (ESICB) , Kyoto University , Kyoto 615-8520 , Japan
| | - Takeshi Iwasa
- Elements Strategy Initiative for Catalysts and Batteries (ESICB) , Kyoto University , Kyoto 615-8520 , Japan.,Department of Chemistry, Faculty of Science , Hokkaido University , Sapporo 060-0810 , Japan
| | - Tetsuya Taketsugu
- Graduate School of Chemical Sciences and Engineering , Hokkaido University , Sapporo 060-0810 , Japan.,Elements Strategy Initiative for Catalysts and Batteries (ESICB) , Kyoto University , Kyoto 615-8520 , Japan.,Department of Chemistry, Faculty of Science , Hokkaido University , Sapporo 060-0810 , Japan.,Institute for Chemical Reaction Design and Discovery (WPI-ICReDD) , Hokkaido University , Sapporo 001-0021 , Japan
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44
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Liu D, Ding Q, Fu Y, Song Z, Peng Y. Rh-Catalyzed C–H Amidation of 2-Arylbenzo[d]thiazoles: An Approach to Single Organic Molecule White Light Emitters in the Solid State. Org Lett 2019; 21:2523-2527. [DOI: 10.1021/acs.orglett.9b00115] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Deming Liu
- Key Laboratory of Functional Small Organic Molecules, Ministry of Education, Jiangxi Normal University, Nanchang, 330022, China
| | - Qiuping Ding
- Key Laboratory of Functional Small Organic Molecules, Ministry of Education, Jiangxi Normal University, Nanchang, 330022, China
| | - Yang Fu
- Key Laboratory of Functional Small Organic Molecules, Ministry of Education, Jiangxi Normal University, Nanchang, 330022, China
| | - Zhibin Song
- Key Laboratory of Functional Small Organic Molecules, Ministry of Education, Jiangxi Normal University, Nanchang, 330022, China
| | - Yiyuan Peng
- Key Laboratory of Functional Small Organic Molecules, Ministry of Education, Jiangxi Normal University, Nanchang, 330022, China
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45
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Tian Q, Luo W, Gan Z, Li D, Dai Z, Wang H, Wang X, Yuan J. Eco-Friendly Syntheses of 2-Substituted Benzoxazoles and 2-Substituted Benzothiazoles from 2-Aminophenols, 2-Aminothiophenols and DMF Derivatives in the Presence of Imidazolium Chloride. Molecules 2019; 24:E174. [PMID: 30621218 PMCID: PMC6337447 DOI: 10.3390/molecules24010174] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2018] [Revised: 12/24/2018] [Accepted: 12/29/2018] [Indexed: 11/17/2022] Open
Abstract
A simple, economical and metal-free approach to the synthesis of 2-substituted benzoxazoles and 2-substituted benzothiazoles from 2-aminophenols, 2-aminothiophenols and DMF derivatives, only using imidazolium chloride (50% mmol) as promoter without any other additive, was reported. Various 2-substituted benzoxazoles and 2-substituted benzothiazoles were thus prepared in moderate to excellent yields.
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Affiliation(s)
- Qingqiang Tian
- Department of Medicinal Chemistry, College of Pharmacy, Chongqing Medical University, Chongqing 400016, China.
| | - Wen Luo
- Department of Medicinal Chemistry, College of Pharmacy, Chongqing Medical University, Chongqing 400016, China.
| | - Zongjie Gan
- Department of Medicinal Chemistry, College of Pharmacy, Chongqing Medical University, Chongqing 400016, China.
| | - Dan Li
- Department of Medicinal Chemistry, College of Pharmacy, Chongqing Medical University, Chongqing 400016, China.
| | - Zeshu Dai
- Department of Medicinal Chemistry, College of Pharmacy, Chongqing Medical University, Chongqing 400016, China.
| | - Huajun Wang
- Department of Medicinal Chemistry, College of Pharmacy, Chongqing Medical University, Chongqing 400016, China.
| | - Xuetong Wang
- Department of Medicinal Chemistry, College of Pharmacy, Chongqing Medical University, Chongqing 400016, China.
| | - Jianyong Yuan
- Department of Medicinal Chemistry, College of Pharmacy, Chongqing Medical University, Chongqing 400016, China.
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46
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Vérité PM, Guido CA, Jacquemin D. First-principles investigation of the double ESIPT process in a thiophene-based dye. Phys Chem Chem Phys 2019; 21:2307-2317. [DOI: 10.1039/c8cp06969g] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Explanation of the experimental triple emission with theoretical tools requires advanced solvent models.
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Affiliation(s)
- Pauline M. Vérité
- Laboratoire CEISAM – UMR CNRS 6230
- Université de Nantes
- 44322 Nantes Cedex 3
- France
| | - Ciro A. Guido
- Laboratoire CEISAM – UMR CNRS 6230
- Université de Nantes
- 44322 Nantes Cedex 3
- France
| | - Denis Jacquemin
- Laboratoire CEISAM – UMR CNRS 6230
- Université de Nantes
- 44322 Nantes Cedex 3
- France
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47
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Felouat A, Curtil M, Massue J, Ulrich G. Excited-state intramolecular proton transfer (ESIPT) emitters based on a 2-(2′-hydroxybenzofuranyl)benzoxazole (HBBO) scaffold functionalised with oligo(ethylene glycol) (OEG) chains. NEW J CHEM 2019. [DOI: 10.1039/c9nj00809h] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This article describes the multi-step synthesis of 2-(2′-hydroxybenzofuran)benzoxazole (HBBO) derivatives functionalised with one to three oligo(ethylene glycol) (OEG) chains with the goal to allow a good vectorization in aqueous media.
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Affiliation(s)
- Abdellah Felouat
- Institut de Chimie et Procédés pour l’Energie, l’Environnement et la Santé (ICPEES), UMR CNRS 7515, Ecole Européenne de Chimie, Polymères et Matériaux (ECPM)
- 67087 Strasbourg Cedex 02
- France
| | - Mathieu Curtil
- Institut de Chimie et Procédés pour l’Energie, l’Environnement et la Santé (ICPEES), UMR CNRS 7515, Ecole Européenne de Chimie, Polymères et Matériaux (ECPM)
- 67087 Strasbourg Cedex 02
- France
| | - Julien Massue
- Institut de Chimie et Procédés pour l’Energie, l’Environnement et la Santé (ICPEES), UMR CNRS 7515, Ecole Européenne de Chimie, Polymères et Matériaux (ECPM)
- 67087 Strasbourg Cedex 02
- France
| | - Gilles Ulrich
- Institut de Chimie et Procédés pour l’Energie, l’Environnement et la Santé (ICPEES), UMR CNRS 7515, Ecole Européenne de Chimie, Polymères et Matériaux (ECPM)
- 67087 Strasbourg Cedex 02
- France
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48
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Vérité PM, Hédé S, Jacquemin D. A theoretical elucidation of the mechanism of tuneable fluorescence in a full-colour emissive ESIPT dye. Phys Chem Chem Phys 2019; 21:17400-17409. [DOI: 10.1039/c9cp03759d] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
We reinvestigate with ab initio tools the origin of the diverse colours in a complex multi-ESIPT dye, and we propose a new assignment for the blue fluorescence.
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Affiliation(s)
- Pauline M. Vérité
- Laboratoire CEISAM-UMR CNRS 6230
- Université de Nantes
- 44322 Nantes Cedex 3
- France
| | - Simon Hédé
- Laboratoire CEISAM-UMR CNRS 6230
- Université de Nantes
- 44322 Nantes Cedex 3
- France
| | - Denis Jacquemin
- Laboratoire CEISAM-UMR CNRS 6230
- Université de Nantes
- 44322 Nantes Cedex 3
- France
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49
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Grotkopp O, Mayer B, Müller TJJ. Diversity-Oriented Synthesis and Optical Properties of Bichromophoric Pyrrole-Fluorophore Conjugates. Front Chem 2018; 6:579. [PMID: 30542648 PMCID: PMC6277781 DOI: 10.3389/fchem.2018.00579] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2018] [Accepted: 11/06/2018] [Indexed: 11/16/2022] Open
Abstract
The mild reaction conditions of the palladium-copper coupling-isomerization reaction open a highly convergent, chromogenic route to blue emissive pyrroles in the sense of a consecutive four-component reaction. By virtue of this strategy a phenol derivative can be readily accessed, which can be transformed in a level-2 transformation to a library of bichromophoric pyrrol-fluorophore conjugates by facile alkylation with fluorophore halides. The photophysics of the underlying blue emitter derivative and the conjugates is studied by absorption and emission spectroscopy, furnishing intramolecular energy transfer at short distances as well as competing fluorescence quenching. In some cases partial energy transfer results in the occurrence of dual emission, for instance seen as magenta-rose emission arising from blue and red orange luminescence. The experimental photophysical studies are rationalized by DFT and TD-DFT calculations.
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Affiliation(s)
- Oliver Grotkopp
- Institut für Organische Chemie und Makromolekulare Chemie, Heinrich-Heine-Universität Düsseldorf Düsseldorf, Germany
| | - Bernhard Mayer
- Institut für Organische Chemie und Makromolekulare Chemie, Heinrich-Heine-Universität Düsseldorf Düsseldorf, Germany
| | - Thomas J J Müller
- Institut für Organische Chemie und Makromolekulare Chemie, Heinrich-Heine-Universität Düsseldorf Düsseldorf, Germany
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50
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Munch M, Curtil M, Vérité PM, Jacquemin D, Massue J, Ulrich G. Ethynyl-Tolyl Extended 2-(2′-Hydroxyphenyl)benzoxazole Dyes: Solution and Solid-state Excited-State Intramolecular Proton Transfer (ESIPT) Emitters. European J Org Chem 2018. [DOI: 10.1002/ejoc.201801590] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Maxime Munch
- UMR CNRS 7515, Ecole Européenne de Chimie, Polymères et Matériaux (ECPM); Institut de Chimie et Procédés pour l′Energie, l′Environnement et la Santé (ICPEES); 25 Rue Becquerel 67087 Strasbourg Cedex 02 France
| | - Mathieu Curtil
- UMR CNRS 7515, Ecole Européenne de Chimie, Polymères et Matériaux (ECPM); Institut de Chimie et Procédés pour l′Energie, l′Environnement et la Santé (ICPEES); 25 Rue Becquerel 67087 Strasbourg Cedex 02 France
| | - Pauline M. Vérité
- CEISAM, UMR CNRS 6230, BP 92208; 2 rue de la Houssinière 44322 Nantes, Cedex 03 France
| | - Denis Jacquemin
- CEISAM, UMR CNRS 6230, BP 92208; 2 rue de la Houssinière 44322 Nantes, Cedex 03 France
| | - Julien Massue
- UMR CNRS 7515, Ecole Européenne de Chimie, Polymères et Matériaux (ECPM); Institut de Chimie et Procédés pour l′Energie, l′Environnement et la Santé (ICPEES); 25 Rue Becquerel 67087 Strasbourg Cedex 02 France
| | - Gilles Ulrich
- UMR CNRS 7515, Ecole Européenne de Chimie, Polymères et Matériaux (ECPM); Institut de Chimie et Procédés pour l′Energie, l′Environnement et la Santé (ICPEES); 25 Rue Becquerel 67087 Strasbourg Cedex 02 France
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