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Fang M, Fu L, Ferreira RAS, Carlos LD. White-Light Emitting Di-Ureasil Hybrids. MATERIALS (BASEL, SWITZERLAND) 2018; 11:E2246. [PMID: 30424487 PMCID: PMC6266990 DOI: 10.3390/ma11112246] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/17/2018] [Revised: 11/06/2018] [Accepted: 11/08/2018] [Indexed: 11/16/2022]
Abstract
White-light emitting materials have emerged as important components for solid state lighting devices with high potential for the replacement of conventional light sources. Herein, amine-functionalized organic-inorganic di-ureasil hybrids consisting of a siliceous skeleton and oligopolyether chains codoped with lanthanide-based complexes, with Eu3+ and Tb3+ ions and 4,4'-oxybis(benzoic acid) and 1,10-phenanthroline ligands, and the coumarin 1 dye were synthesized by in situ sol⁻gel method. The resulting luminescent di-ureasils show red, green, and blue colors originated from the Eu3+, Tb3+, and C1 emissions, respectively. The emission colors can be modulated either by variation of the relative concentration between the emitting centers or by changing the excitation wavelength. White light emission is achieved under UV excitation with absolute quantum yields of 0.148 ± 0.015, 0.167 ± 0.017, and 0.202 ± 0.020 at 350, 332, and 305 nm excitation, respectively. The emission mechanism was investigated by photoluminescence and UV⁻visible absorption spectroscopy, revealing an efficient energy transfer from the organic ligands to the Ln3+ ions and the organic dye, whereas negligible interaction between the dopants is discerned. The obtained luminescent di-ureasils have potential for optoelectronic applications, such as in white-light emitting diodes.
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Affiliation(s)
- Ming Fang
- Department of Physics, CICECO-Aveiro Institute of Materials, University of Aveiro, 3810-193 Aveiro, Portugal.
| | - Lianshe Fu
- Department of Physics, CICECO-Aveiro Institute of Materials, University of Aveiro, 3810-193 Aveiro, Portugal.
| | - Rute A S Ferreira
- Department of Physics, CICECO-Aveiro Institute of Materials, University of Aveiro, 3810-193 Aveiro, Portugal.
| | - Luís D Carlos
- Department of Physics, CICECO-Aveiro Institute of Materials, University of Aveiro, 3810-193 Aveiro, Portugal.
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Nibbering ET, Chudoba C, Elsaesser T. Hydrogen-Bond Dynamics and Solvation of Electronically Excited States as Determined by Femtosecond Vibrational Spectroscopy. Isr J Chem 2013. [DOI: 10.1002/ijch.199900040] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Bibila Mayaya Bisseyou Y, Bouhmaida N, Guillot B, Lecomte C, Lugan N, Ghermani N, Jelsch C. Experimental and database-transferred electron-density analysis and evaluation of electrostatic forces in coumarin-102 dye. ACTA CRYSTALLOGRAPHICA SECTION B: STRUCTURAL SCIENCE 2012; 68:646-60. [PMID: 23165601 DOI: 10.1107/s0108768112042826] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/02/2012] [Accepted: 10/12/2012] [Indexed: 11/10/2022]
Abstract
The electron-density distribution of a new crystal form of coumarin-102, a laser dye, has been investigated using the Hansen-Coppens multipolar atom model. The charge density was refined versus high-resolution X-ray diffraction data collected at 100 K and was also constructed by transferring the charge density from the Experimental Library of Multipolar Atom Model (ELMAM2). The topology of the refined charge density has been analysed within the Bader `Atoms In Molecules' theory framework. Deformation electron-density peak heights and topological features indicate that the chromen-2-one ring system has a delocalized π-electron cloud in resonance with the N (amino) atom. The molecular electrostatic potential was estimated from both experimental and transferred multipolar models; it reveals an asymmetric character of the charge distribution across the molecule. This polarization effect is due to a substantial charge delocalization within the molecule. The molecular dipole moments derived from the experimental and transferred multipolar models are also compared with the liquid and gas-phase dipole moments. The substantial molecular dipole moment enhancements observed in the crystal environment originate from the crystal field and from intermolecular charge transfer induced and controlled by C-H···O and C-H···N intermolecular hydrogen bonds. The atomic forces were integrated over the atomic basins and compared for the two electron-density models.
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Affiliation(s)
- Yvon Bibila Mayaya Bisseyou
- Laboratoire de Cristallographie, Résonance Magnétique et Modélisations (CRM²), CNRS, UMR 7036, Institut Jean Barriol, Faculté des Sciences et Technologies, Université de Lorraine, BP 70239, 54506 Vandoeuvre-lès-Nancy CEDEX, France
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Husain MM, Sindhu R, Tandon HC. Photophysical properties and estimation of ground and excited state dipole moments of 7-diethylamino and 7-diethylamino-4-methyl coumarin dyes from absorption and emission spectra. ACTA ACUST UNITED AC 2012. [DOI: 10.5155/eurjchem.3.1.87-93.519] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Ingrosso F, Ladanyi BM, Mennucci B, Elola MD, Tomasi J. Solvation Dynamics in Acetonitrile: A Study Incorporating Solute Electronic Response and Nuclear Relaxation. J Phys Chem B 2005; 109:3553-64. [PMID: 16851393 DOI: 10.1021/jp0456032] [Citation(s) in RCA: 56] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The solvent reorganization process after electronic excitation of a polar solute in a polar solvent such as acetonitrile is related mainly to the time evolution of the solute-solvent electrostatic interaction. Modern laser-based techniques have sufficient time resolution to follow this decay in real time, providing information to be confirmed and interpreted by theories and models. We present here a study aimed at the investigation of the different steps involved in the process taking place after a vertical S(0) --> S(1) excitation of a large size chromophore, coumarin 153 (C153), in acetonitrile, from both the solute and the solvent points of view. To do this, we use accurate quantum mechanical calculations for the solute properties within the polarizable continuum model (PCM) and classical molecular dynamics (MD) simulations, both equilibrium and nonequilibrium, for C153 in the presence of the solvent. The geometry of the solute is allowed to change in order to study the role of internal motions in the time-dependent solvation process. The solvent response function has been obtained from the simulation data and compared to experiment, while the comparison between equilibrium and nonequilibrium MD results for the solvation response confirms the validity of the linear response approximation in the C153-acetonitrile system. The MD trajectories have also been used to monitor the structure of the solvation shell and to determine its change in response to the change in the solute partial charges.
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Affiliation(s)
- Francesca Ingrosso
- Dipartimento di Chimica e Chimica Industriale, Università di Pisa, Via Risorgimento 35, 56126 Pisa, Italy
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Gustavsson T, Cassara L, Marguet S, Gurzadyan G, van der Meulen P, Pommeret S, Mialocq JC. Rotational diffusion of the 7-diethylamino-4-methylcoumarin C1 dye molecule in polar protic and aprotic solvents. Photochem Photobiol Sci 2003; 2:329-41. [PMID: 12713235 DOI: 10.1039/b211755j] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Fluorescence anisotropy decays of the 7-diethylamino-4-methylcoumarin C1 in various polar solvents of different viscosities and hydrogen bond donor/acceptor character have been recorded by means of the fluorescence upconversion and time-correlated single photon counting techniques. The resulting characteristic times for the rotational diffusion fall into two classes with regards to the viscosity-dependency: n-alcohols and "other" solvents. This deviation from the simple Stokes-Einstein-Debye model may be interpreted in terms of rotation of the coumarin molecule under two different hydrodynamic boundary-conditions ("stick" or "slip") in the two solvent classes. Possible explanations for this behaviour are discussed, and in particular solvent attachment and additional dielectric friction. Both these phenomena may in fact, under certain conditions, explain our findings. Our opinion, however, is that the dielectric friction model offers a more realistic picture of the additional rotational friction experienced by C1 in n-alcohols.
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Affiliation(s)
- T Gustavsson
- CEA/Saclay, DSM/DRECAM/SCM, URA 331 CNRS, Laboratoire Claude Fréjacques, F-91191 Gif-sur-Yvette Cedex, France
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Morlet-Savary F, Ley C, Jacques P, Fouassier JP. Photophysics of a Bridged 7-Diethylamino-4-methyl-coumarin C102: Studying the Hydrogen Bonding Effect by Time Resolved Stimulated Emission. J Phys Chem A 2001. [DOI: 10.1021/jp010753n] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- F. Morlet-Savary
- Département de Photochimie Générale, CNRS UMR n°7525, Ecole Nationale Supérieure de Chimie de Mulhouse, 3 Rue Alfred Werner, 68093 Mulhouse Cedex, France
| | - C. Ley
- Département de Photochimie Générale, CNRS UMR n°7525, Ecole Nationale Supérieure de Chimie de Mulhouse, 3 Rue Alfred Werner, 68093 Mulhouse Cedex, France
| | - P. Jacques
- Département de Photochimie Générale, CNRS UMR n°7525, Ecole Nationale Supérieure de Chimie de Mulhouse, 3 Rue Alfred Werner, 68093 Mulhouse Cedex, France
| | - J. P. Fouassier
- Département de Photochimie Générale, CNRS UMR n°7525, Ecole Nationale Supérieure de Chimie de Mulhouse, 3 Rue Alfred Werner, 68093 Mulhouse Cedex, France
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Cichos F, Brown R, Bopp PA. Coupled molecular dynamics/semiempirical simulation of organic solutes in polar liquids. II. Coumarin 153 in methanol and acetonitrile. J Chem Phys 2001. [DOI: 10.1063/1.1351876] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Orozco M, Luque FJ. Theoretical Methods for the Description of the Solvent Effect in Biomolecular Systems. Chem Rev 2000; 100:4187-4226. [PMID: 11749344 DOI: 10.1021/cr990052a] [Citation(s) in RCA: 454] [Impact Index Per Article: 18.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Modesto Orozco
- Departament de Bioquímica i Biologia Molecular, Facultat de Química, Universitat de Barcelona, Martí i Franqués 1, E-08028 Barcelona, Spain, and Departament de Fisicoquímica, Facultat de Farmàcia, Universitat de Barcelona, Avgda. Diagonal s/n, E-08028 Barcelona, Spain
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Nibbering ETJ, Tschirschwitz F, Chudoba C, Elsaesser T. Femtochemistry of Hydrogen Bonded Complexes after Electronic Excitation in the Liquid Phase: The Case of Coumarin 102. J Phys Chem A 2000. [DOI: 10.1021/jp9937095] [Citation(s) in RCA: 72] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- E. T. J. Nibbering
- Max-Born-Institut für Nichtlineare Optik und Kurzzeitspektroskopie, Max-Born-Strasse 2A, D-12489 Berlin, Germany
| | - F. Tschirschwitz
- Max-Born-Institut für Nichtlineare Optik und Kurzzeitspektroskopie, Max-Born-Strasse 2A, D-12489 Berlin, Germany
| | - C. Chudoba
- Max-Born-Institut für Nichtlineare Optik und Kurzzeitspektroskopie, Max-Born-Strasse 2A, D-12489 Berlin, Germany
| | - T. Elsaesser
- Max-Born-Institut für Nichtlineare Optik und Kurzzeitspektroskopie, Max-Born-Strasse 2A, D-12489 Berlin, Germany
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Brown R, Middelhoek R, Glasbeek M. Solvation dynamics of fluoroprobe in diethylether. J Chem Phys 1999. [DOI: 10.1063/1.479641] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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