1
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Giunchi A, Pandolfi L, Salzillo T, Brillante A, Della Valle RG, d'Agostino S, Venuti E. Visualizing a SCSC [2 + 2] photodimerization through its lattice dynamics: an experimental and theoretical investigation. Chemphyschem 2022; 23:e202200168. [PMID: 35393755 PMCID: PMC9325048 DOI: 10.1002/cphc.202200168] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2022] [Revised: 04/07/2022] [Indexed: 11/12/2022]
Abstract
In homogeneous solid‐state reactions, the single‐crystal nature of the starting material remains unchanged, and the system evolves seamlessly through a series of solid solutions of reactant and product. Among [2+2] photodimerizations of cinnamic acid derivatives in the solid state, those involving salts of the 4‐aminocinnamic acid have been recognized to proceed homogeneously in a “single‐crystal‐to‐single‐crystal” fashion by X‐ray diffraction techniques. Here the bromide salt of this compound class is taken as a model system in a Raman spectroscopy study at low wavelengths, to understand how such a mechanism defines the trend of the crystal lattice vibrations during the reaction. Vibrational mode calculations, based on dispersion corrected DFT simulations of the crystal lattices involved in the transformation, have assisted the interpretation of the experiments. Such an approach has allowed us to clarify the spectral signatures and to establish a correlation between the dynamics of the monomer and dimer systems in a process where chemical progress and crystal structural changes are demonstrated to occur simultaneously.
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Affiliation(s)
- Andrea Giunchi
- Alma Mater Studiorum Università di Bologna: Universita di Bologna, Chimica Industriale "Toso Montanari", Viale del Risorgimento 4, 40136, Bologna, ITALY
| | - Lorenzo Pandolfi
- Alma Mater Studiorum Università di Bologna: Universita di Bologna, Chimica Industriale "Toso Montanari", Viale del Risorgimento 4, 40136, Bologna, ITALY
| | - Tommaso Salzillo
- Universita degli Studi di Bologna, Chimica Industriale "Toso Montanari", Viale del Risorgimento, 40136, Bologna, ITALY
| | - Aldo Brillante
- Alma Mater Studiorum Università di Bologna: Universita di Bologna, Chimica Industriale "Toso Montanari", Viale del Risorgimento 4, 40136, Bologna, ITALY
| | - Raffaele Guido Della Valle
- Alma Mater Studiorum Università di Bologna: Universita di Bologna, Chimica Industriale "Toso Montanari", Viale del Risorgimento 4, 40136, Bologna, ITALY
| | - Simone d'Agostino
- Alma Mater Studiorum Università di Bologna: Universita di Bologna, Chemistry "G. Ciamician", Via Selmi 2, Bologna, ITALY
| | - Elisabetta Venuti
- Alma Mater Studiorum Università di Bologna: Universita di Bologna, Chimica Industriale "Toso Montanari", Viale del Risorgimento 4, 40136, Bologna, ITALY
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2
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Kim VO, Broch K, Belova V, Chen YS, Gerlach A, Schreiber F, Tamura H, Della Valle RG, D'Avino G, Salzmann I, Beljonne D, Rao A, Friend R. Singlet exciton fission via an intermolecular charge transfer state in coevaporated pentacene-perfluoropentacene thin films. J Chem Phys 2019; 151:164706. [PMID: 31675857 DOI: 10.1063/1.5130400] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Singlet exciton fission is a spin-allowed process in organic semiconductors by which one absorbed photon generates two triplet excitons. Theory predicts that singlet fission is mediated by intermolecular charge-transfer states in solid-state materials with appropriate singlet-triplet energy spacing, but direct evidence for the involvement of such states in the process has not been provided yet. Here, we report on the observation of subpicosecond singlet fission in mixed films of pentacene and perfluoropentacene. By combining transient spectroscopy measurements to nonadiabatic quantum-dynamics simulations, we show that direct excitation in the charge-transfer absorption band of the mixed films leads to the formation of triplet excitons, unambiguously proving that they act as intermediate states in the fission process.
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Affiliation(s)
- Vincent O Kim
- Cavendish Laboratory, Department of Physics, University of Cambridge, Cambridge CB3 0HE, United Kingdom
| | - Katharina Broch
- Fritz Haber Institute of the Max Planck Society, Department of Physical Chemistry, Faradayweg, 4-614195 Berlin, Germany
| | - Valentina Belova
- Eberhard-Karls Universität Tübingen, Institut für Angewandte Physik, Auf der Morgenstelle 10, 72076 Tübingen, Germany
| | - Y S Chen
- Cavendish Laboratory, Department of Physics, University of Cambridge, Cambridge CB3 0HE, United Kingdom
| | - Alexander Gerlach
- Eberhard-Karls Universität Tübingen, Institut für Angewandte Physik, Auf der Morgenstelle 10, 72076 Tübingen, Germany
| | - Frank Schreiber
- Eberhard-Karls Universität Tübingen, Institut für Angewandte Physik, Auf der Morgenstelle 10, 72076 Tübingen, Germany
| | - Hiroyuki Tamura
- Department of Chemical System Engineering, The University of Tokyo, Tokyo 113-8656, Japan
| | - Raffaele Guido Della Valle
- Dipartimento di Chimica Industriale "Toso Montanari", Università di Bologna and INSTM-UdR Bologna, Viale Risorgimento 4, 40136 Bologna, Italy
| | - Gabriele D'Avino
- Institut Néel, CNRS and Grenoble Alpes University, F-38042 Grenoble, France
| | - Ingo Salzmann
- Department of Physics, Department of Chemistry and Biochemistry, Centre for Research in Molecular Modeling (CERMM), Centre for NanoScience Research (CeNSR), Concordia University, 7141 Sherbrooke St. West, Montreal, Quebec H4B 1R6, Canada
| | - David Beljonne
- Laboratory for Chemistry of Novel Materials, Department of Chemistry, Université de Mons, Place du Parc 20, 7000 Mons, Belgium
| | - Akshay Rao
- Cavendish Laboratory, Department of Physics, University of Cambridge, Cambridge CB3 0HE, United Kingdom
| | - Richard Friend
- Cavendish Laboratory, Department of Physics, University of Cambridge, Cambridge CB3 0HE, United Kingdom
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3
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Braun D, Rivalta A, Giunchi A, Bedoya-Martinez N, Schrode B, Venuti E, Della Valle RG, Werzer O. Surface Induced Phenytoin Polymorph. 1. Full Structure Solution by Combining Grazing Incidence X-ray Diffraction and Crystal Structure Prediction. Cryst Growth Des 2019; 19:6058-6066. [PMID: 31728132 PMCID: PMC6839513 DOI: 10.1021/acs.cgd.9b00857] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/02/2019] [Revised: 09/15/2019] [Indexed: 05/31/2023]
Abstract
Understanding the behavior and properties of molecules assembled in thin layers requires knowledge of their crystalline packing. The drug phenytoin (5,5-diphenylhydantoin) is one of the compounds that can be grown as a surface induced polymorph. By using grazing incidence X-ray diffraction, the monoclinic unit cell of the new form II can be determined, but, due to crystal size and the low amount of data, a full solution using conventional structure solving strategies fails. In this work, the full solution has been obtained by combining computational structure generation and experimental results. The comparison between the bulk and the new surface induced phase reveals significant packing differences of the hydrogen-bonding network, which might be the reason for the faster dissolution of form II with respect to form I. The results are very satisfactory, and the method might be adapted for other systems, where, due to the limited amount of experimental data, one must rely on additional approaches to gain access to more detailed information to understand the solid-state behavior.
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Affiliation(s)
- Doris
E. Braun
- Institute
of Pharmacy, University of Innsbruck, Innrain 52c, 6020 Innsbruck, Austria
| | - Arianna Rivalta
- Department
of Industrial Chemistry “Toso Montanari”, University of Bologna, Viale Risorgimento 4, I-40136 Bologna, Italy
| | - Andrea Giunchi
- Department
of Industrial Chemistry “Toso Montanari”, University of Bologna, Viale Risorgimento 4, I-40136 Bologna, Italy
| | | | - Benedikt Schrode
- Institute
of Solid State Physics, NAWI Graz, Graz
University of Technology, Petersgasse 16, 8010 Graz, Austria
- Institute
of Pharmaceutical Science, Department of Pharmaceutical Technology, University of Graz, Univertitaetsplatz 1, 8010 Graz, Austria
| | - Elisabetta Venuti
- Department
of Industrial Chemistry “Toso Montanari”, University of Bologna, Viale Risorgimento 4, I-40136 Bologna, Italy
| | - Raffaele Guido Della Valle
- Department
of Industrial Chemistry “Toso Montanari”, University of Bologna, Viale Risorgimento 4, I-40136 Bologna, Italy
| | - Oliver Werzer
- Institute
of Pharmaceutical Science, Department of Pharmaceutical Technology, University of Graz, Univertitaetsplatz 1, 8010 Graz, Austria
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4
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Giunchi A, Rivalta A, Bedoya-Martínez N, Schrode B, Braun DE, Werzer O, Venuti E, Della Valle RG. Surface Induced Phenytoin Polymorph. 2. Structure Validation by Comparing Experimental and Density Functional Theory Raman Spectra. Cryst Growth Des 2019; 19:6067-6073. [PMID: 33828438 PMCID: PMC8016182 DOI: 10.1021/acs.cgd.9b00863] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/03/2019] [Revised: 09/15/2019] [Indexed: 06/12/2023]
Abstract
A method for structure solution in thin films that combines grazing incidence X-ray diffraction data analysis and crystal structure prediction was presented in a recent work (Braun et al. Cryst. Growth Des.2019, DOI: 10.1021/acs.cgd.9b00857). Applied to phenytoin form II, which is only detected in films, the approach gave a very reasonable, but not fully confirmed, candidate structure with Z = 4 and Z' = 2. In the present work, we demonstrate how, by calculating and measuring the crystal Raman spectrum in the low wavenumber energy region with the aim of validating the candidate structure, this can be further refined. In fact, we find it to correspond to a saddle point of the energy landscape of the system, from which a minimum of lower symmetry may be reached. With the new structure, with Z = 4 and Z' = 2, we finally obtain an excellent agreement between experimental and calculated Raman spectra.
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Affiliation(s)
- Andrea Giunchi
- Department
of Industrial Chemistry “Toso Montanari”, University of Bologna, Viale Risorgimento 4, I-40136 Bologna, Italy
| | - Arianna Rivalta
- Department
of Industrial Chemistry “Toso Montanari”, University of Bologna, Viale Risorgimento 4, I-40136 Bologna, Italy
| | | | - Benedikt Schrode
- Institute
of Pharmaceutical Science, Department of Pharmaceutical Technology, University of Graz, 8010 Graz, Austria
- Institute
of Solid State Physics, NAWI Graz, Graz
University of Technology, Petersgasse 16, 8010 Graz, Austria
| | - Doris E. Braun
- Institute
of Pharmacy, University of Innsbruck, Innrain 52c, 6020 Innsbruck, Austria
| | - Oliver Werzer
- Institute
of Pharmaceutical Science, Department of Pharmaceutical Technology, University of Graz, 8010 Graz, Austria
| | - Elisabetta Venuti
- Department
of Industrial Chemistry “Toso Montanari”, University of Bologna, Viale Risorgimento 4, I-40136 Bologna, Italy
| | - Raffaele Guido Della Valle
- Department
of Industrial Chemistry “Toso Montanari”, University of Bologna, Viale Risorgimento 4, I-40136 Bologna, Italy
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5
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Bedoya-Martínez N, Giunchi A, Salzillo T, Venuti E, Della Valle RG, Zojer E. Toward a Reliable Description of the Lattice Vibrations in Organic Molecular Crystals: The Impact of van der Waals Interactions. J Chem Theory Comput 2018; 14:4380-4390. [DOI: 10.1021/acs.jctc.8b00484] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Natalia Bedoya-Martínez
- Institute of Solid State Physics, NAWI Graz, Graz University of Technology, Petersgasse 16, 8010 Graz, Austria
| | - Andrea Giunchi
- Department of Industrial Chemistry “Toso Montanari”, University of Bologna, Viale Risorgimento 4, I-40136 Bologna, Italy
| | - Tommaso Salzillo
- Department of Industrial Chemistry “Toso Montanari”, University of Bologna, Viale Risorgimento 4, I-40136 Bologna, Italy
| | - Elisabetta Venuti
- Department of Industrial Chemistry “Toso Montanari”, University of Bologna, Viale Risorgimento 4, I-40136 Bologna, Italy
| | - Raffaele Guido Della Valle
- Department of Industrial Chemistry “Toso Montanari”, University of Bologna, Viale Risorgimento 4, I-40136 Bologna, Italy
| | - Egbert Zojer
- Institute of Solid State Physics, NAWI Graz, Graz University of Technology, Petersgasse 16, 8010 Graz, Austria
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6
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Bedoya-Martínez N, Schrode B, Jones AOF, Salzillo T, Ruzié C, Demitri N, Geerts YH, Venuti E, Della Valle RG, Zojer E, Resel R. DFT-Assisted Polymorph Identification from Lattice Raman Fingerprinting. J Phys Chem Lett 2017; 8:3690-3695. [PMID: 28731723 PMCID: PMC5545759 DOI: 10.1021/acs.jpclett.7b01634] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
A combined experimental and theoretical approach, consisting of lattice phonon Raman spectroscopy and density functional theory (DFT) calculations, is proposed as a tool for lattice dynamics characterization and polymorph phase identification. To illustrate the reliability of the method, the lattice phonon Raman spectra of two polymorphs of the molecule 2,7-dioctyloxy[1]benzothieno[3,2-b]benzothiophene are investigated. We show that DFT calculations of the lattice vibrations based on the known crystal structures, including many-body dispersion van der Waals (MBD-vdW) corrections, predict experimental data within an accuracy of ≪5 cm-1 (≪0.6 meV). Due to the high accuracy of the simulations, they can be used to unambiguously identify different polymorphs and to characterize the nature of the lattice vibrations and their relationship to the structural properties. More generally, this work implies that DFT-MBD-vdW is a promising method to describe also other physical properties that depend on lattice dynamics like charge transport.
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Affiliation(s)
- Natalia Bedoya-Martínez
- Institute
of Solid State Physics, NAWI Graz, Graz
University of Technology, Petersgasse 16, 8010 Graz, Austria
- E-mail: (N.B.-M.)
| | - Benedikt Schrode
- Institute
of Solid State Physics, NAWI Graz, Graz
University of Technology, Petersgasse 16, 8010 Graz, Austria
| | - Andrew O. F. Jones
- Institute
of Solid State Physics, NAWI Graz, Graz
University of Technology, Petersgasse 16, 8010 Graz, Austria
| | - Tommaso Salzillo
- Department
of Industrial Chemistry “Toso Montanari”, University of Bologna, Viale Risorgimento 4, I-40136 Bologna, Italy
| | - Christian Ruzié
- Laboratoire
de Chimie des Polyméres, Faculté des Sciences, Université Libre de Bruxelles (ULB) CP206/01, Campus de la Plaine, 1050 Brussels, Belgium
| | - Nicola Demitri
- Elettra
- Sincrotrone Trieste, S.S. 14 Km 163.5 in Area Science Park, 34149 Basovizza, Trieste, Italy
| | - Yves H. Geerts
- Laboratoire
de Chimie des Polyméres, Faculté des Sciences, Université Libre de Bruxelles (ULB) CP206/01, Campus de la Plaine, 1050 Brussels, Belgium
| | - Elisabetta Venuti
- Department
of Industrial Chemistry “Toso Montanari”, University of Bologna, Viale Risorgimento 4, I-40136 Bologna, Italy
| | - Raffaele Guido Della Valle
- Department
of Industrial Chemistry “Toso Montanari”, University of Bologna, Viale Risorgimento 4, I-40136 Bologna, Italy
| | - Egbert Zojer
- Institute
of Solid State Physics, NAWI Graz, Graz
University of Technology, Petersgasse 16, 8010 Graz, Austria
| | - Roland Resel
- Institute
of Solid State Physics, NAWI Graz, Graz
University of Technology, Petersgasse 16, 8010 Graz, Austria
- E-mail: (R.R.)
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7
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Femoni C, Iapalucci MC, Longoni G, Zacchini S, Ciabatti I, Della Valle RG, Mazzani M, Riccò M. The Chemistry of Ni-Sb Carbonyl Clusters - Synthesis and Characterization of the [Ni19Sb4(CO)26]4-Tetraanion and the Viologen Salts of [Ni13Sb2(CO)24]n-Carbonyl Clusters. Eur J Inorg Chem 2014. [DOI: 10.1002/ejic.201402289] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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8
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Roscioni OM, Muccioli L, Della Valle RG, Pizzirusso A, Ricci M, Zannoni C. Predicting the anchoring of liquid crystals at a solid surface: 5-cyanobiphenyl on cristobalite and glassy silica surfaces of increasing roughness. Langmuir 2013; 29:8950-8. [PMID: 23597166 DOI: 10.1021/la400857s] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
We employ atomistic molecular dynamics simulations to predict the alignment and anchoring strength of a typical nematic liquid crystal, 4-n-pentyl-4'-cyano biphenyl (5CB), on different forms of silica. In particular, we study a thin (~20 nm) film of 5CB supported on surfaces of crystalline (cristobalite) and amorphous silica of different roughness. We find that the orientational order at the surface and the anchoring strength depend on the morphology of the silica surface and its roughness. Cristobalite yields a uniform planar orientation and increases the order at the surface with respect to the bulk whereas amorphous glass has a disordering effect. Despite the low order at the amorphous surfaces, a planar orientation is established with a persistence length into the film higher than the one obtained for cristobalite.
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Affiliation(s)
- Otello Maria Roscioni
- Diartimento di Chimica Industriale Toso Montanari and INSTM, Università di Bologna, Bologna, Italy
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9
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Salzillo T, Bilotti I, Della Valle RG, Venuti E, Brillante A. Crystal-to-Crystal Photoinduced Reaction of Dinitroanthracene to Anthraquinone. J Am Chem Soc 2012; 134:17671-9. [DOI: 10.1021/ja307088n] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Tommaso Salzillo
- Dipartimento di Chimica Fisica e Inorganica and INSTM−UdR
Bologna, University of Bologna, I-40136
Bologna, Italy
| | - Ivano Bilotti
- Dipartimento di Chimica Fisica e Inorganica and INSTM−UdR
Bologna, University of Bologna, I-40136
Bologna, Italy
| | - Raffaele Guido Della Valle
- Dipartimento di Chimica Fisica e Inorganica and INSTM−UdR
Bologna, University of Bologna, I-40136
Bologna, Italy
| | - Elisabetta Venuti
- Dipartimento di Chimica Fisica e Inorganica and INSTM−UdR
Bologna, University of Bologna, I-40136
Bologna, Italy
| | - Aldo Brillante
- Dipartimento di Chimica Fisica e Inorganica and INSTM−UdR
Bologna, University of Bologna, I-40136
Bologna, Italy
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10
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Costanzo F, Sulpizi M, Valle RGD, Sprik M. The oxidation of tyrosine and tryptophan studied by a molecular dynamics normal hydrogen electrode. J Chem Phys 2011; 134:244508. [DOI: 10.1063/1.3597603] [Citation(s) in RCA: 99] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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11
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Della Valle RG, Venuti E, Brillante A, Girlando A. Molecular Dynamics Simulations for a Pentacene Monolayer on Amorphous Silica. Chemphyschem 2009; 10:1783-8. [DOI: 10.1002/cphc.200900084] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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12
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Affiliation(s)
- Francesca Costanzo
- Dipartimento di Chimica Fisica ed Inorganica, Università di Bologna, viale Risorgimento 4, I-40137 Bologna, Italy
| | - Raffaele Guido Della Valle
- Dipartimento di Chimica Fisica ed Inorganica, Università di Bologna, viale Risorgimento 4, I-40137 Bologna, Italy
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13
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Abstract
Using sexithiophene as a benchmark compound, we present a very effective strategy for searching the potential energy minima of a crystalline material, described in terms of rigid molecules with Coulombic and atom-atom interactions. The strategy involves uniform sampling of the many-body energy hypersurface, mechanical identification of all constraints deriving from the crystallographic symmetry, and a "sight-resight" method, originally introduced in wildlife ecology, for assessing the completeness of the search. Thousands of distinct potential energy minima, with a surprising variety of structural arrangements, are identified for sexithiophene. Despite the large number of competing minima, the system presents a small number of deep minima, with very different structures and not particularly congested in energy or density. The two deepest minima correspond to the structures of the two known experimental polymorphs, which are satisfactorily described.
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Affiliation(s)
- Raffaele Guido Della Valle
- Dipartimento di Chimica Fisica e Inorganica and INSTM-UdR Bologna, Universita di Bologna, Viale Risorgimento 4, I-40136 Bologna, Italy
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14
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Costanzo F, Sulpizi M, Guido Della Valle R, Sprik M. First Principles Study of Alkali−Tyrosine Complexes: Alkali Solvation and Redox Properties. J Chem Theory Comput 2008; 4:1049-56. [DOI: 10.1021/ct8000415] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Francesca Costanzo
- Dipartimento di Chimica Fisica e Inorganica and INSTM-UdR Bologna, Universita di Bologna, Viale Risorgimento 4, I-40136 Bologna, Italy, and, Department of Chemistry, University of Cambridge, Lensfield Road, CB2 1EW Cambridge, U.K
| | - Marialore Sulpizi
- Dipartimento di Chimica Fisica e Inorganica and INSTM-UdR Bologna, Universita di Bologna, Viale Risorgimento 4, I-40136 Bologna, Italy, and, Department of Chemistry, University of Cambridge, Lensfield Road, CB2 1EW Cambridge, U.K
| | - Raffaele Guido Della Valle
- Dipartimento di Chimica Fisica e Inorganica and INSTM-UdR Bologna, Universita di Bologna, Viale Risorgimento 4, I-40136 Bologna, Italy, and, Department of Chemistry, University of Cambridge, Lensfield Road, CB2 1EW Cambridge, U.K
| | - Michiel Sprik
- Dipartimento di Chimica Fisica e Inorganica and INSTM-UdR Bologna, Universita di Bologna, Viale Risorgimento 4, I-40136 Bologna, Italy, and, Department of Chemistry, University of Cambridge, Lensfield Road, CB2 1EW Cambridge, U.K
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15
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Della Valle RG, Venuti E, Brillante A, Girlando A. Do Computed Crystal Structures of Nonpolar Molecules Depend on the Electrostatic Interactions? The Case of Tetracene. J Phys Chem A 2008; 112:1085-9. [DOI: 10.1021/jp710273r] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Raffaele Guido Della Valle
- Dipartimento di Chimica Fisica e Inorganica and INSTM-UdR Bologna, Università di Bologna, Viale Risorgimento 4, I-40136 Bologna, Italy
| | - Elisabetta Venuti
- Dipartimento di Chimica Fisica e Inorganica and INSTM-UdR Bologna, Università di Bologna, Viale Risorgimento 4, I-40136 Bologna, Italy
| | - Aldo Brillante
- Dipartimento di Chimica Fisica e Inorganica and INSTM-UdR Bologna, Università di Bologna, Viale Risorgimento 4, I-40136 Bologna, Italy
| | - Alberto Girlando
- Dipartimento di Chimica G.I.A.F. and INSTM-UdR Parma, Università di Parma, Parco Area delle Scienze, I-43100, Parma, Italy
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16
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Brillante A, Bilotti I, Della Valle RG, Venuti E, Girlando A. Probing polymorphs of organic semiconductors by lattice phonon Raman microscopy. CrystEngComm 2008. [DOI: 10.1039/b804317e] [Citation(s) in RCA: 99] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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17
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Brillante A, Bilotti I, Della Valle RG, Venuti E, Milita S, Dionigi C, Borgatti F, Lazar AN, Biscarini F, Mas-Torrent M, Oxtoby NS, Crivillers N, Veciana J, Rovira C, Leufgen M, Schmidt G, Molenkamp LW. The four polymorphic modifications of the semiconductor dibenzo-tetrathiafulvalene. CrystEngComm 2008. [DOI: 10.1039/b810993a] [Citation(s) in RCA: 57] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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18
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Abstract
We have systematically sampled the potential energy surface of crystalline tetracene to identify its local minima. These minima represent all possible stable configurations and constitute the "inherent structures" of the system. The crystal is described in terms of rigid molecules with Coulombic and atom-atom interactions. Hundreds of distinct minima are identified, mostly belonging to the space groups P (triclinic) and P2(1)/c (monoclinic), with a variety of structural arrangements. The deepest minimum corresponds to the high temperature-low pressure polymorph. This is the only polymorph with a completely described X-ray structure, which is satisfactorily described by the calculations. The next deep minimum is likely to correspond to the low temperature-high pressure polymorph, which has been experimentally identified but not yet fully described.
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Affiliation(s)
- Raffaele Guido Della Valle
- Dipartimento di Chimica Fisica e Inorganica and INSTM-UdR Bologna, Università di Bologna, Viale Risorgimento 4, I-40136 Bologna, Italy
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Costanzo F, Della Valle RG, Barone V. MD Simulation of the Na+−Phenylalanine Complex in Water: Competition between Cation−π Interaction and Aqueous Solvation. J Phys Chem B 2005; 109:23016-23. [PMID: 16853999 DOI: 10.1021/jp055271g] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The competition between cation-pi interaction and aqueous solvation for the Na+ ion has been investigated by molecular dynamics simulations, using the phenylalanine amino acid as the test pi system. Starting from one of the best standard force fields, we have developed new parameters that significantly improve the agreement with experimental and high quality quantum mechanical results for the complexes of Na+ with phenylalanine, benzene, and water. The modified force field performs very well in forecasting energy and geometry of cation coordination for the complexes. Next, analysis of MD trajectories and steered MD simulations indicate that the Na+-phenylalanine complex survives for a significant time in aqueous solution and that the free energy barrier opposing dissociation of the complex is sizable. Finally, we analyze the role of different intermolecular interactions in determining the preference for cation-pi bonding with respect to aqueous solvation. We thus confirm that the Na+-phenylalanine stabilization energy may overcome the interactions with water.
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Affiliation(s)
- Francesca Costanzo
- Dipartimento di Chimica Fisica ed Inorganica, Università di Bologna, viale Risorgimento 4, I-40137 Bologna, Italy
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Masino M, Girlando A, Brillante A, Farina L, Della Valle RG, Venuti E. Lattice dynamics and electron-phonon coupling in pentacene crystal structures. ACTA ACUST UNITED AC 2004. [DOI: 10.1002/masy.200450845] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Della Valle RG, Venuti E, Farina L, Brillante A, Masino M, Girlando A. Intramolecular and Low-Frequency Intermolecular Vibrations of Pentacene Polymorphs as a Function of Temperature. J Phys Chem B 2004. [DOI: 10.1021/jp0354550] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Bini R, Foggi P, Della Valle RG. Vibrational analysis of the carbon-hydrogen stretching overtones in pyridine and 2,6-lutidine. ACTA ACUST UNITED AC 2002. [DOI: 10.1021/j100161a017] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Abstract
We have performed a lattice dynamics calculation to compute the "inherent structures" of minimum potential energy for pentacene, starting from available X-ray data. The calculation shows that two distinct bulk crystalline phases of pentacene exist, with very subtle structural differences but clearly different phonon spectra. The method of crystal growth (from solution or vapor) is not the determining factor for obtaining either structure.
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Affiliation(s)
- Elisabetta Venuti
- Dipartimento di Chimica Fisica e Inorganica, Università di Bologna, Viale Risorgimento 4, I-40136 Bologna, Italy
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Della Valle RG, Venuti E, Farina L, Brillante A. Coupling between lattice and intramolecular modes in 9,10-dimethylanthracene: Raman spectra under pressure and quasi-harmonic lattice dynamics calculations. Chem Phys 2001. [DOI: 10.1016/s0301-0104(01)00493-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Venuti E, Guido Della Valle R, Farina L, Brillante A, Vescovi C, Girlando A. Temperature dependence of structure and phonons of α- and β-TTF crystals. Phys Chem Chem Phys 2001. [DOI: 10.1039/b104987a] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Della Valle RG, Brillante A, Venuti E, Palazzi L. Coupling between intramolecular and lattice vibrations in solid para-diiodobenzene. Chem Phys Lett 2000. [DOI: 10.1016/s0009-2614(00)00743-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Gazzillo D, Giacometti A, Guido Della Valle R, Venuti E, Carsughi F. A scaling approximation for structure factors in the integral equation theory of polydisperse nonionic colloidal fluids. J Chem Phys 1999. [DOI: 10.1063/1.480089] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Angeloni L, Fracassi PF, Della Valle RG. Theoretical analysis of resonant raman scattering: Simulations of lineshapes and excitation profiles. Chem Phys 1985. [DOI: 10.1016/0301-0104(85)80054-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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