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Jones CF, Hood BR, de Coene Y, Lopez-Poves I, Champagne B, Clays K, Fielden J. Bridge improvement work: maximising non-linear optical performance in polyoxometalate derivatives. Chem Commun (Camb) 2024; 60:1731-1734. [PMID: 38240142 DOI: 10.1039/d3cc05433k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/09/2024]
Abstract
New phenyl and stilbene-bridged polyoxometalate (POM) charge-transfer chromophores with diphenylamino donor groups produce, respectively, the highest intrinsic and absolute quadratic hyperpolarisabilities measured for such species. The β0,zzz obtained for the phenyl bridge - at 180 × 10-30 esu - is remarkable for a short conjugated system while changing to the stilbene (260 × 10-30 esu) produces a substantial increase in non-linearity for a minimal red-shift in the absorption profile. Together with TD-DFT calculations, the results show that maximising conjugation in the π-bridge is vital to high performance in such "POMophores".
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Affiliation(s)
- Claire F Jones
- School of Chemistry, University of East Anglia, Norwich, NR4 7TJ, UK
| | - Bethany R Hood
- School of Chemistry, University of East Anglia, Norwich, NR4 7TJ, UK
| | - Yovan de Coene
- Department of Chemistry, University of Leuven, Celestijnenlaan 200D, Leuven B-3001, Belgium
| | - Ivan Lopez-Poves
- School of Chemistry, University of East Anglia, Norwich, NR4 7TJ, UK
| | - Benoît Champagne
- Unit of Theoretical and Structural Physical Chemistry, Namur Institute of Structured Matter, University of Namur, Namur B-5000, Belgium
| | - Koen Clays
- Department of Chemistry, University of Leuven, Celestijnenlaan 200D, Leuven B-3001, Belgium
| | - John Fielden
- School of Chemistry, University of East Anglia, Norwich, NR4 7TJ, UK
- Department of Chemistry, Lancaster University, Lancaster, LA1 4YB, UK.
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Krajewski B, Rajput SS, Chołuj M, Wojaczyńska E, Miniewicz A, Alam MM, Zaleśny R. First-order hyperpolarizabilities of propellanes: elucidating structure-property relationships. Phys Chem Chem Phys 2022; 24:13534-13541. [PMID: 35612526 DOI: 10.1039/d2cp00381c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Following recent experimental work demonstrating strong nonlinear optical properties, namely second harmonic generation of light, in crystals composed of 16,20-dinitro-(3,4,8,9)-dibenzo-2,7-dioxa-5,10-diaza[4.4.4]propellane molecules [A. Miniewicz, S. Bartkiewicz, E. Wojaczyńska, T. Galica, R. Zaleśny and R. Jakubas, J. Mater. Chem. C, 2019, 7, 1255-1262] in this paper we aim to investigate "structure-property" relationships for a series of 16 propellanes presenting a wide palette of substituents with varying electron-accepting/donating capabilities. To that end, we use electronic- and vibrational-structure theories and a recently developed generalized few-state model combined with a range-separated CAM-B3LYP functional to analyze electronic and vibrational contributions to the first hyperpolarizability for the whole series of molecules. The variations in computed properties are large among the studied set of substituents and can reach an order of magnitude. It has been demonstrated that the maximum values of frequency-independent first hyperpolarizability are expected for strong electron-accepting NO2 substituents, but only at the preferred position with respect to the electronegative oxygen atom in the 1,4-oxazine moiety. This holds for electronic as well as vibrational counterparts.
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Affiliation(s)
- Bartosz Krajewski
- Department of Theoretical Physics, Faculty of Fundamental Problems of Technology, Wrocław University of Science and Technology, Wyb. Wyspiańskiego 27, PL-50370, Wrocław, Poland
| | - Swati Singh Rajput
- Department of Chemistry, Indian Institute of Technology Bhilai, Sejbahar, Raipur, Chhattisgarh, 492015, India.
| | - Marta Chołuj
- Faculty of Chemistry, Wrocław University of Science and Technology, Wyb. Wyspiańskiego 27, PL-50370, Wrocław, Poland.
| | - Elżbieta Wojaczyńska
- Faculty of Chemistry, Wrocław University of Science and Technology, Wyb. Wyspiańskiego 27, PL-50370, Wrocław, Poland.
| | - Andrzej Miniewicz
- Faculty of Chemistry, Wrocław University of Science and Technology, Wyb. Wyspiańskiego 27, PL-50370, Wrocław, Poland.
| | - Md Mehboob Alam
- Department of Chemistry, Indian Institute of Technology Bhilai, Sejbahar, Raipur, Chhattisgarh, 492015, India.
| | - Robert Zaleśny
- Faculty of Chemistry, Wrocław University of Science and Technology, Wyb. Wyspiańskiego 27, PL-50370, Wrocław, Poland.
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Special Issue of Symmetry: “Recent Advances in Linear and Nonlinear Optics”. Symmetry (Basel) 2022. [DOI: 10.3390/sym14030495] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Abstract
In this Special Issue, invited researchers elaborate on ‘Recent Advances in Linear and Nonlinear Optics’, demonstrating how sensitive light–matter interactions are concerning symmetry [...]
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