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Champagne B, Plaquet A, Pozzo JL, Rodriguez V, Castet F. Nonlinear Optical Molecular Switches as Selective Cation Sensors. J Am Chem Soc 2012; 134:8101-3. [DOI: 10.1021/ja302395f] [Citation(s) in RCA: 234] [Impact Index Per Article: 19.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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152
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Van Mierloo S, Liégeois V, Kudrjasova J, Botek E, Lutsen L, Champagne B, Vanderzande D, Adriaensens P, Maes W. Combined experimental-theoretical NMR study on 2,5-bis(5-aryl-3-hexylthiophen-2-yl)-thiazolo[5,4-d]thiazole derivatives for printable electronics. MAGNETIC RESONANCE IN CHEMISTRY : MRC 2012; 50:379-387. [PMID: 22508501 DOI: 10.1002/mrc.3812] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/05/2011] [Revised: 01/12/2012] [Accepted: 02/21/2012] [Indexed: 05/31/2023]
Abstract
Four 2,5-bis(5-aryl-3-hexylthiophen-2-yl)thiazolo[5,4-d]thiazole derivatives have been synthesized and thoroughly characterized. The extended aromatic core of the molecules was designed to enhance the charge transport characteristics, and solubilizing hexyl side chains were introduced on the thiophene subunits to enable possible integration of these semiconducting small molecules in printable electronics. Complete elucidation of the chemical structures by detailed one-dimensional/two-dimensional NMR spectroscopy is described, providing interesting input for chemical shift prediction software as well, because limited experimental data on these types of compounds are currently available. Furthermore, theoretical calculations have assisted experimental observations--giving support for the chemical shift assignment and providing a springboard for future screening and predictions--demonstrating the benefits of a coordinated theoretical-experimental approach.
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153
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Feugmo CGT, Champagne B, Caudano Y, Cecchet F, Chabal YJ, Liégeois V. Towards modelling the vibrational signatures of functionalized surfaces: carboxylic acids on H-Si(111) surfaces. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2012; 24:124111. [PMID: 22394578 DOI: 10.1088/0953-8984/24/12/124111] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
In this work, we investigate the adsorption process of two carboxylic acids (stearic and undecylenic) on a H-Si(111) surface via the calculation of structural and energy changes as well as the simulation of their IR and Raman spectra. The two molecules adsorb differently at the surface since the stearic acid simply physisorbs while the undecylenic acid undergoes a chemical reaction with the hydrogen atoms of the surface. This difference is observed in the change of geometry during the adsorption. Indeed, the chemisorption of the undecylenic acid has a bigger impact on the structure than the physisorption of the stearic acid. Consistently, the former is also characterized by a larger value of adsorption energy and a smaller value of the tilting angle with respect to the normal plane. For both the IR and Raman signatures, the spectra of both molecules adsorbed at the surface are in a first approximation the superposition of the spectra of the Si cluster and of the carboxylic acid considered individually. The main deviation from this simple observation is the peak of the stretching Si-H (ν(Si-H)) mode, which is split into two peaks upon adsorption. As expected, the splitting is bigger for the chemisorption than the physisorption. The modes corresponding to atomic displacements close to the adsorption site display a frequency upshift by a dozen wavenumbers. One can also see the disappearance of the peaks associated with the C=C double bond when the undecylenic acid chemisorbs at the surface. The Raman and IR spectra are complementary and one can observe here that the most active Raman modes are generally IR inactive. Two exceptions to this are the two ν(Si-H) modes which are active in both spectroscopies. Finally, we compare our simulated spectra with some experimental measurements and we find an overall good agreement.
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154
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Cecchet F, Lis D, Caudano Y, Mani AA, Peremans A, Champagne B, Guthmuller J. Density functional theory-based simulations of sum frequency generation spectra involving methyl stretching vibrations: effect of the molecular model on the deduced molecular orientation and comparison with an analytical approach. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2012; 24:124110. [PMID: 22394554 DOI: 10.1088/0953-8984/24/12/124110] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The knowledge of the first hyperpolarizability tensor elements of molecular groups is crucial for a quantitative interpretation of the sum frequency generation (SFG) activity of thin organic films at interfaces. Here, the SFG response of the terminal methyl group of a dodecanethiol (DDT) monolayer has been interpreted on the basis of calculations performed at the density functional theory (DFT) level of approximation. In particular, DFT calculations have been carried out on three classes of models for the aliphatic chains. The first class of models consists of aliphatic chains, containing from 3 to 12 carbon atoms, in which only one methyl group can freely vibrate, while the rest of the chain is frozen by a strong overweight of its C and H atoms. This enables us to localize the probed vibrational modes on the methyl group. In the second class, only one methyl group is frozen, while the entire remaining chain is allowed to vibrate. This enables us to analyse the influence of the aliphatic chain on the methyl stretching vibrations. Finally, the dodecanethiol (DDT) molecule is considered, for which the effects of two dielectrics, i.e. n-hexane and n-dodecane, are investigated. Moreover, DDT calculations are also carried out by using different exchange-correlation (XC) functionals in order to assess the DFT approximations. Using the DFT IR vectors and Raman tensors, the SFG spectrum of DDT has been simulated and the orientation of the methyl group has then been deduced and compared with that obtained using an analytical approach based on a bond additivity model. This analysis shows that when using DFT molecular properties, the predicted orientation of the terminal methyl group tends to converge as a function of the alkyl chain length and that the effects of the chain as well as of the dielectric environment are small. Instead, a more significant difference is observed when comparing the DFT-based results with those obtained from the analytical approach, thus indicating the importance of a quantum chemical description of the hyperpolarizability tensor elements of the methyl group.
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155
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Champagne B. WITHDRAWN: Second-order NLO responses of heptahelicene and heptathiahelicene derivatives. Chem Phys Lett 2012. [DOI: 10.1016/j.cplett.2012.03.015] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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156
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Causey M, Steele S, Maykel J, Martin M, Champagne B, Johnson E. Surgical Therapy for Epidermoid Carcinoma of the Anal Canal: A NSQIP Assessment of Short-term Outcomes. J Surg Res 2012. [DOI: 10.1016/j.jss.2011.11.043] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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157
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Champagne B. Full configuration interaction calculations of the second hyperpolarizabilities of the H4 model compound: Summation-over-states analysis and interplay with diradical characters. J Chem Phys 2012; 136:024315. [DOI: 10.1063/1.3675684] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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158
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Castet F, Bogdan E, Plaquet A, Ducasse L, Champagne B, Rodriguez V. Reference molecules for nonlinear optics: A joint experimental and theoretical investigation. J Chem Phys 2012; 136:024506. [DOI: 10.1063/1.3675848] [Citation(s) in RCA: 120] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
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159
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Liégeois V, Champagne B. Theoretical investigation of Raman optical activity signatures of Tröger's base. J Phys Chem A 2011; 115:13706-13. [PMID: 21967042 DOI: 10.1021/jp208591j] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The Raman and VROA spectra of (S,S)-Tröger's base are simulated. We mainly discuss the peaks in the 1140-1400 cm(-1) wavenumber range where an intense VROA signature is found. In this range, nearly all of the Raman-active bands belong to the irreducible representation A (C(2) point group), whereas no such observation is made for the VROA spectrum. The vibrational normal modes associated with the peaks in this range mainly consist of wagging and twisting motions of the hydrogen atoms. From the atomic contribution patterns (ACPs) and the group coupling matrices (GCMs), one finds that the VROA backward-scattering intensities mainly arise from hydrogen and carbon atoms in the vicinity of the two chiral nitrogen atoms. The VROA signatures in the 1140-1400 cm(-1) range are therefore a fingerprint of the local chirality around the two chiral nitrogen centers.
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160
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Nakano M, Fukui H, Minami T, Yoneda K, Shigeta Y, Kishi R, Champagne B, Botek E, Kubo T, Ohta K, Kamada K. Erratum to: (Hyper)polarizability density analysis for open-shell molecular systems based on natural orbitals and occupation numbers. Theor Chem Acc 2011. [DOI: 10.1007/s00214-011-1064-z] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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161
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Diliën H, Marin L, Botek E, Champagne B, Lemaur V, Beljonne D, Lazzaroni R, Cleij TJ, Maes W, Lutsen L, Vanderzande D, Adriaensens PJ. Fingerprints for Structural Defects in Poly(thienylene vinylene) (PTV): A Joint Theoretical–Experimental NMR Study on Model Molecules. J Phys Chem B 2011; 115:12040-50. [DOI: 10.1021/jp206663v] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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162
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Plaquet A, Champagne B, Kulhánek J, Bureš F, Bogdan E, Castet F, Ducasse L, Rodriguez V. Effects of the nature and length of the π-conjugated bridge on the second-order nonlinear optical responses of push-pull molecules including 4,5-dicyanoimidazole and their protonated forms. Chemphyschem 2011; 12:3245-52. [PMID: 21830291 DOI: 10.1002/cphc.201100299] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2011] [Indexed: 11/09/2022]
Abstract
Theoretical and experimental methods of characterization have been employed to investigate a series of six push-pull molecules containing a 4,5-dicyanoimidazole acceptor (A) unit, a N,N-dimethylamino donor (D) group, and systematically enlarged π-conjugated linkers (π) with the view of assessing their first hyperpolarizabilities (β) as well as their variations upon protonation. The results demonstrated that protonation occurred at the N,N-dimethylamino function, which led to disruption of the electronic charge-transfer delocalization: the A-π-D pattern of the neutral species with large β values was transformed into an A-π-A' pattern, which displayed much smaller β values. This feature makes these systems applicable as pH-triggered nonlinear optics (NLO) switches. In particular, protonation led to a decrease of the hyper-Rayleigh scattering first hyperpolarizabilities by at least one order of magnitude as well as to a decrease of the depolarization ratio, from about five for neutral species, which also supported the 1D-like NLO-phore nature, to about two for the protonated ones.
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163
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Nakano M, Kishi R, Yoneda K, Inoue Y, Inui T, Shigeta Y, Kubo T, Champagne B. Third-Order Nonlinear Optical Properties of Open-Shell Supermolecular Systems Composed of Acetylene Linked Phenalenyl Radicals. J Phys Chem A 2011; 115:8767-77. [PMID: 21736369 DOI: 10.1021/jp205259p] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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164
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Yoneda K, Nakano M, Fukui H, Minami T, Shigeta Y, Kubo T, Botek E, Champagne B. Open-Shell Characters and Second Hyperpolarizabilities of One-Dimensional Graphene Nanoflakes Composed of Trigonal Graphene Units. Chemphyschem 2011; 12:1697-707. [PMID: 21591047 DOI: 10.1002/cphc.201001089] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2010] [Revised: 03/11/2011] [Indexed: 11/11/2022]
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165
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de Wergifosse M, Champagne B. Electron correlation effects on the first hyperpolarizability of push–pull π-conjugated systems. J Chem Phys 2011; 134:074113. [DOI: 10.1063/1.3549814] [Citation(s) in RCA: 156] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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166
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Van Mierloo S, Adriaensens PJ, Maes W, Lutsen L, Cleij TJ, Botek E, Champagne B, Vanderzande DJ. A three-step synthetic approach to asymmetrically functionalized 4H-cyclopenta[2,1-b:3,4-b']dithiophenes. J Org Chem 2011; 75:7202-9. [PMID: 20925367 DOI: 10.1021/jo101405j] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A convenient and efficient three-step route toward both symmetrically and asymmetrically functionalized 4H-cyclopenta[2,1-b:3,4-b']dithiophenes has been developed. Using this method a broad collection of functionalized bridged bithiophenes can smoothly be accessed. Starting from 3-bromo-2,2'-bithiophene, prepared by Kumada coupling of 2-thienylmagnesium bromide with 2,3-dibromothiophene under Pd(dppf)Cl(2) catalysis, lithiation and subsequent reaction with dialkyl ketones afforded (a)symmetrically dialkylated tertiary alcohol derivatives. By means of final Friedel-Crafts dehydration cyclization in sulfuric acid medium, these derivatives were converted to 4,4-dialkyl-4H-cyclopenta[2,1-b:3,4-b']dithiophenes. Upon replacement of the dialkyl ketone reagent by ethyl levulinate, an ester-functionalized 4H-cyclopenta[2,1-b:3,4-b']dithiophene was prepared, representing an attractive precursor for variously functionalized cyclopentadithiophene compounds.
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167
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Yoosaf K, Llanes-Pallas A, Marangoni T, Belbakra A, Marega R, Botek E, Champagne B, Bonifazi D, Armaroli N. From molecular to macroscopic engineering: shaping hydrogen-bonded organic nanomaterials. Chemistry 2011; 17:3262-73. [PMID: 21308805 DOI: 10.1002/chem.201002103] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2010] [Revised: 11/25/2010] [Indexed: 11/06/2022]
Abstract
The self-assembly and self-organization behavior of chromophoric acetylenic scaffolds bearing 2,6-bis(acetylamino)pyridine (1, 2) or uracyl-type (3-9) terminal groups has been investigated by photophysical and microscopic methods. Systematic absorption and luminescence studies show that 1 and 2, thanks to a combination of solvophilic/solvophobic forces and π-π stacking interactions, undergo self-organization in apolar solvents (i.e., cyclohexane) and form spherical nanoparticles, as evidenced by wide-field optical microscopy, TEM, and AFM analysis. For the longer molecular module, 2, a more uniform size distribution is found (80-200 nm) compared to 1 (20-1000 nm). Temperature scans in the range 283-353 K show that the self-organized nanoparticles are reversibly formed and destroyed, being stable at lower temperatures. Molecular modules 1 and 2 were then thoroughly mixed with the complementary triply hydrogen-bonding units 3-9. Depending on the specific geometrical structure of 3-9, different nanostructures are evidenced by microscopic investigations. Combination of modules 1 or 2 with 3, which bears only one terminal uracyl unit, leads to the formation of vesicular structures; instead, when 1 is combined with bis-uracyl derivative 4 or 5, a structural evolution from nanoparticles to nanowires is observed. The length of the wires obtained by mixing 1 and 4 or 1 and 5 can be controlled by addition of 3, which prompts transformation of the wires into shorter rods. The replacement of linear system 5 with the related angular modules 6 and 7 enables formation of helical nanostructures, unambiguously evidenced by AFM. Finally, thermally induced self-assembly was studied in parallel with modules 8 and 9, in which the uracyl recognition sites are protected with tert-butyloxycarbonyl (BOC) groups. This strategy allows further control of the self-assembly/self-organization process by temperature, since the BOC group is completely removed on heating. Microscopy studies show that the BOC-protected ditopic modules 8 self-assemble and self-organize with 1 into ordered linear nanostructures, whereas BOC-protected tritopic system 9 gives rise to extended domains of circular nano-objects in combination with 1.
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168
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Fukui H, Shigeta Y, Nakano M, Kubo T, Kamada K, Ohta K, Champagne B, Botek E. Enhancement of Second Hyperpolarizabilities in Open-Shell Singlet Slipped-Stack Dimers Composed of Square Planar Nickel Complexes Involving o-Semiquinonato Type Ligands. J Phys Chem A 2011; 115:1117-24. [PMID: 21247185 DOI: 10.1021/jp1073895] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
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169
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Motomura S, Nakano M, Fukui H, Yoneda K, Kubo T, Carion R, Champagne B. Size dependences of the diradical character and the second hyperpolarizabilities in dicyclopenta-fused acenes: relationships with their aromaticity/antiaromaticity. Phys Chem Chem Phys 2011; 13:20575-83. [DOI: 10.1039/c1cp20773c] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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170
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Champagne B, Botek E. Giant electric field effect on the second hyperpolarizability of symmetric singlet diradical molecules. J Chem Phys 2010; 133:154302. [DOI: 10.1063/1.3488229] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
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171
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Delhalle J, Champagne B, Dory M, Fripiat JG, André JM. An Ab Initio Study of the Equilibrium Geometry and Electric Polarizability of Polyethylene, Polysilane, Polyacetylene and Polysilylene Model Compounds. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/bscb.19890980925] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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172
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Drooghaag X, Marchand-Brynaert J, Champagne B, Liégeois V. Combined Experimental and Theoretical Study on the Raman and Raman Optical Activity Signatures of Pentamethylundecane Diastereoisomers. J Phys Chem B 2010; 114:11753-60. [DOI: 10.1021/jp105028q] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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173
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Konishi A, Hirao Y, Nakano M, Shimizu A, Botek E, Champagne B, Shiomi D, Sato K, Takui T, Matsumoto K, Kurata H, Kubo T. Synthesis and Characterization of Teranthene: A Singlet Biradical Polycyclic Aromatic Hydrocarbon Having Kekulé Structures. J Am Chem Soc 2010; 132:11021-3. [DOI: 10.1021/ja1049737] [Citation(s) in RCA: 254] [Impact Index Per Article: 18.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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174
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Bogdan E, Rougier L, Ducasse L, Champagne B, Castet F. Nonlinear Optical Properties of Flavylium Salts: A Quantum Chemical Study. J Phys Chem A 2010; 114:8474-9. [DOI: 10.1021/jp1056804] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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175
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Carion R, Champagne B, Monaco G, Zanasi R, Pelloni S, Lazzeretti P. Ring Current Model and Anisotropic Magnetic Response of Cyclopropane. J Chem Theory Comput 2010; 6:2002-18. [DOI: 10.1021/ct100175j] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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176
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Liégeois V, Jacob CR, Champagne B, Reiher M. Analysis of Vibrational Raman Optical Activity Signatures of the (TG)N and (GG)N Conformations of Isotactic Polypropylene Chains in Terms of Localized Modes. J Phys Chem A 2010; 114:7198-212. [DOI: 10.1021/jp102739g] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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177
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Sergeyev S, Didier D, Boitsov V, Teshome A, Asselberghs I, Clays K, Vande Velde C, Plaquet A, Champagne B. Symmetrical and Nonsymmetrical Chromophores with Tröger’s Base Skeleton: Chiroptical, Linear, and Quadratic Nonlinear Optical Properties-A Joint Theoretical and Experimental Study. Chemistry 2010; 16:8181-90. [DOI: 10.1002/chem.201000216] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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178
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Bonness S, Fukui H, Yoneda K, Kishi R, Champagne B, Botek E, Nakano M. Theoretical investigation on the second hyperpolarizabilities of open-shell singlet systems by spin-unrestricted density functional theory with long-range correction: Range separating parameter dependence. Chem Phys Lett 2010. [DOI: 10.1016/j.cplett.2010.05.026] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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179
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Nagai H, Nakano M, Yoneda K, Kishi R, Takahashi H, Shimizu A, Kubo T, Kamada K, Ohta K, Botek E, Champagne B. Signature of multiradical character in second hyperpolarizabilities of rectangular graphene nanoflakes. Chem Phys Lett 2010. [DOI: 10.1016/j.cplett.2010.03.013] [Citation(s) in RCA: 73] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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180
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Kishi R, Bonness S, Yoneda K, Takahashi H, Nakano M, Botek E, Champagne B, Kubo T, Kamada K, Ohta K, Tsuneda T. Long-range corrected density functional theory study on static second hyperpolarizabilities of singlet diradical systems. J Chem Phys 2010; 132:094107. [PMID: 20210389 DOI: 10.1063/1.3332707] [Citation(s) in RCA: 76] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
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181
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Kanoun MB, Botek E, Champagne B. Electrostatic modeling of the linear optical susceptibilities of 2-methyl-4-nitroaniline, m-nitroaniline, 3-methyl-4-nitropyridine N-oxide and 2-carboxylic acid-4-nitropyridine-1-oxide crystals. Chem Phys Lett 2010. [DOI: 10.1016/j.cplett.2010.01.021] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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182
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Cecchet F, Lis D, Guthmuller J, Champagne B, Caudano Y, Silien C, Addin Mani A, Thiry PA, Peremans A. Orientational Analysis of Dodecanethiol and p-Nitrothiophenol SAMs on Metals with Polarisation-Dependent SFG Spectroscopy. Chemphyschem 2010; 11:607-15. [DOI: 10.1002/cphc.200900733] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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183
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Botek E, d'Antuono P, Jacques A, Carion R, Champagne B, Maton L, Taziaux D, Habib-Jiwan JL. Theoretical and experimental investigation of the structural and spectroscopic properties of coumarin 343 fluoroionophores. Phys Chem Chem Phys 2010; 12:14172-87. [DOI: 10.1039/c003514a] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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184
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Guthmuller J, Zutterman F, Champagne B. Multimode simulation of dimer absorption spectra from first principles calculations: Application to the 3,4,9,10-perylenetetracarboxylic diimide dimer. J Chem Phys 2009; 131:154302. [DOI: 10.1063/1.3245403] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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185
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Guthmuller J, Champagne B, Moucheron C, Kirsch - De Mesmaeker A. Investigation of the Resonance Raman Spectra and Excitation Profiles of a Monometallic Ruthenium(II) [Ru(bpy)2(HAT)]2+ Complex by Time-Dependent Density Functional Theory. J Phys Chem B 2009; 114:511-20. [DOI: 10.1021/jp908154q] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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186
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Yoneda K, Nakano M, Kishi R, Takahashi H, Shimizu A, Kubo T, Kamada K, Ohta K, Champagne B, Botek E. Third-order nonlinear optical properties of trigonal, rhombic and bow-tie graphene nanoflakes with strong structural dependence of diradical character. Chem Phys Lett 2009. [DOI: 10.1016/j.cplett.2009.09.047] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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187
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Botek E, Champagne B. Remarkable two-photon absorption in open-shell singlet systems. J Chem Phys 2009; 131:114316. [DOI: 10.1063/1.3225202] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
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188
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Kubota K, Takahashi H, Fukui H, Bonness S, Yoneda K, Kishi R, Kubo T, Kamada K, Ohta K, Champagne B, Botek E, Nakano M. Erratum to ‘Electron donor solvent effects on the (hyepr)polarizabilities of a singlet diradical molecule involving a boron atom’ [Chem. Phys. Lett. 477 (2009) 309]. Chem Phys Lett 2009. [DOI: 10.1016/j.cplett.2009.08.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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189
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Guthmuller J, Cecchet F, Lis D, Caudano Y, Mani AA, Thiry PA, Peremans A, Champagne B. Theoretical Simulation of Vibrational Sum-Frequency Generation Spectra from Density Functional Theory: Application top-Nitrothiophenol and 2,4-Dinitroaniline. Chemphyschem 2009; 10:2132-42. [DOI: 10.1002/cphc.200900184] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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190
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Kubota K, Takahashi H, Fukui H, Bonness S, Yoneda K, Kishi R, Kubo T, Kamada K, Ohta K, Champagne B, Botek E, Nakano M. Electron donor solvent effects on the (hyper)polarizabilities of a singlet diradical molecule involving a boron atom. Chem Phys Lett 2009. [DOI: 10.1016/j.cplett.2009.07.022] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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191
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Liégeois V, Champagne B. Vibrational Raman optical activity of π-conjugated helical systems: Hexahelicene and heterohelicenes. J Comput Chem 2009; 30:1261-78. [DOI: 10.1002/jcc.21151] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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192
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Méreau R, Castet F, Botek E, Champagne B. Effect of the Dynamical Disorder on the Second-Order Nonlinear Optical Responses of Helicity-Encoded Polymer Strands. J Phys Chem A 2009; 113:6552-4. [DOI: 10.1021/jp904418r] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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193
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Guillaume M, Champagne B, Bégué D, Pouchan C. Electrostatic interaction schemes for evaluating the polarizability of silicon clusters. J Chem Phys 2009; 130:134715. [DOI: 10.1063/1.3104629] [Citation(s) in RCA: 30] [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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194
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d'Antuono P, Botek E, Champagne B, Wieme J, Reyniers MF, Marin GB, Adriaensens PJ, Gelan JM. A joined theoretical-experimental investigation on the 1H and 13C NMR signatures of defects in poly(vinyl chloride). J Phys Chem B 2009; 112:14804-18. [PMID: 18975894 DOI: 10.1021/jp805676q] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
1H and 13C chemical shifts of PVC chains have been evaluated using quantum chemistry methods in order to evidence and interpret the NMR signatures of chains bearing unsaturated and branched defects. The geometrical structures of the stable conformers have been determined using molecular mechanics and the OPLS force field and then density functional theory with the B3LYP functional and the 6-311G(d) basis set. The nuclear shielding tensor has been calculated at the coupled-perturbed Kohn-Sham level (B3LYP exchange-correlation functional) using the 6-311+G(2d,p) basis set. The computational scheme accounts for the large number of stable conformers of the PVC chains, and average chemical shifts are evaluated using the Maxwell-Boltzmann distribution. Moreover, the chemical shifts are corrected for the inherent and rather systematic errors of the method of calculation by employing linear regression equations, which have been deduced from comparing experimental and theoretical results on small alkane model compounds containing Cl atoms and/or unsaturations. For each type of defect, PVC segments presenting different tacticities have been considered because it is known from linear PVC chains that the racemic (meso) dyads are characterized by larger (smaller) chemical shifts. NMR signatures of unsaturations in PVC chains have been highlighted for the internal -CH=CH- and -CH=CCl- units as well as for terminal unsaturations like the chloroallylic -CH=CH-CH2Cl group. In particular, the 13C chemical shifts of the two sp2 C atoms are very close for the chloroallylic end group. The CH2 and CHCl units surrounding an unsaturation present also specific 13C chemical shifts, which allow distinguishing them from the others. In the case of the proton, the CH2 unit of the -CHCl-CH2-CCl=CH- segment presents a larger chemical shift (2.6-2.7 ppm), while some CHCl units close to the -CH=CH- unsaturations appear at rather small chemical shifts (3.7 ppm). The -CH2Cl and -CHCl-CH2Cl branches also display specific signatures, which result in large part from modifications of the equilibrium conformations and their reduced number owing to the increased steric interactions. These branches lead to the appearance of 13C peaks at lower field associated either to the CH unit linking the -CH2Cl and -CHCl-CH2Cl branches (50 ppm) or to the CHCl unit of the ethyl branches (60 ppm). The corresponding protons resonate also at specific frequencies: 3.5-4.0 ppm for the -CH2Cl branch or 3.8-4.2 ppm for the terminal unit of the -CHCl-CH2Cl branch. Several of these signatures have been detected in the experimental 1H and 13C NMR spectra and are consistent with the reaction mechanisms.
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Mançois F, Pozzo JL, Pan J, Adamietz F, Rodriguez V, Ducasse L, Castet F, Plaquet A, Champagne B. Two-Way Molecular Switches with Large Nonlinear Optical Contrast. Chemistry 2009; 15:2560-71. [DOI: 10.1002/chem.200801967] [Citation(s) in RCA: 123] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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196
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Champagne B, Spassova M. Theoretical investigation on the polarizability and second hyperpolarizability of polysilole. Chem Phys Lett 2009. [DOI: 10.1016/j.cplett.2009.02.019] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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197
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Plaquet A, Champagne B, Castet F, Ducasse L, Bogdan E, Rodriguez V, Pozzo JL. Theoretical investigation of the dynamic first hyperpolarizability of DHA–VHF molecular switches. NEW J CHEM 2009. [DOI: 10.1039/b900432g] [Citation(s) in RCA: 57] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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198
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Matena M, Llanes-Pallas A, Enache M, Jung T, Wouters J, Champagne B, Stöhr M, Bonifazi D. Conformation-controlled networking of H-bonded assemblies on surfaces. Chem Commun (Camb) 2009:3525-7. [DOI: 10.1039/b902120e] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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199
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De Meulenaere E, Asselberghs I, de Wergifosse M, Botek E, Spaepen S, Champagne B, Vanderleyden J, Clays K. Second-order nonlinear optical properties of fluorescent proteins for second-harmonic imaging. ACTA ACUST UNITED AC 2009. [DOI: 10.1039/b907789h] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Guthmuller J, Zutterman F, Champagne B. Prediction of Vibronic Coupling and Absorption Spectra of Dimers from Time-Dependent Density Functional Theory: The Case of a Stacked Streptocyanine. J Chem Theory Comput 2008; 4:2094-100. [DOI: 10.1021/ct8003047] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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