1
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Rok M, Miniewicz A, Zdończyk M, Zarychta B, Mikurenda JW, Bartkiewicz S, Wiśniewska-Bełej M, Cybińska J, Piecha-Bisiorek A. Nonlinear Optical Activity of a Chiral Organic-Inorganic ([(NH 3CH 2CH 2) 3NH]) 2[MnBr 5]Br 5 Photoluminescent and Piezoelectric Crystal. J Phys Chem Lett 2024; 15:5276-5287. [PMID: 38722175 PMCID: PMC11103696 DOI: 10.1021/acs.jpclett.4c00709] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2024] [Revised: 04/29/2024] [Accepted: 05/02/2024] [Indexed: 05/22/2024]
Abstract
The family of Mn-based organic-inorganic hybrids has greatly expanded due to their advantages in applications. They also show superior bright and size-tunable photoluminescence and can be considered a perfect alternative to toxic lead-based compounds. In this work, we present the detailed structural, optical, and electrical characterization of ([(NH3CH2CH2)3NH])2[MnBr5]Br5. The title compound exhibits a unique type of inorganic arrangement created by the trigonal bipyramids. It crystallizes in noncentrosymmetric space group R32, indicating its optical activity, piezoelectricity, and second-order optical nonlinearity proven by the second harmonic of light measurements. The studied crystals exhibit intense photoluminescence originating from the Mn(II) ion 4T1(G) → 6A1 transition. The measured lifetime of the photoluminescence emission is ≤1.5 ms, while the measured quantum yield for both powder and crystal samples reaches ∼70%.
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Affiliation(s)
- Magdalena Rok
- Faculty
of Chemistry, University of Wroclaw, 14 F. Joliot - Curie, 50-383 Wroclaw, Poland
| | - Andrzej Miniewicz
- Institute
of Advanced Materials, Faculty of Chemistry, Wroclaw University of Science and Technology, Wybrzeże Wyspiańskiego
27, 50-370 Wroclaw, Poland
| | - Maria Zdończyk
- Faculty
of Chemistry, University of Wroclaw, 14 F. Joliot - Curie, 50-383 Wroclaw, Poland
- Łukasiewicz
Research Network - PORT Polish Center for Technology Development, ul. Stabłowicka 147, 54-066 Wrocław, Poland
| | - Bartosz Zarychta
- Faculty
of Chemistry, University of Opole, Oleska 48, 45-052 Opole, Poland
| | - Julia W. Mikurenda
- Faculty
of Chemistry, University of Wroclaw, 14 F. Joliot - Curie, 50-383 Wroclaw, Poland
| | - Stanisław Bartkiewicz
- Institute
of Advanced Materials, Faculty of Chemistry, Wroclaw University of Science and Technology, Wybrzeże Wyspiańskiego
27, 50-370 Wroclaw, Poland
| | - Monika Wiśniewska-Bełej
- Institute
of Advanced Materials, Faculty of Chemistry, Wroclaw University of Science and Technology, Wybrzeże Wyspiańskiego
27, 50-370 Wroclaw, Poland
| | - Joanna Cybińska
- Faculty
of Chemistry, University of Wroclaw, 14 F. Joliot - Curie, 50-383 Wroclaw, Poland
- Łukasiewicz
Research Network - PORT Polish Center for Technology Development, ul. Stabłowicka 147, 54-066 Wrocław, Poland
| | - Anna Piecha-Bisiorek
- Faculty
of Chemistry, University of Wroclaw, 14 F. Joliot - Curie, 50-383 Wroclaw, Poland
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2
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Turner GA, Hwang Y, Rong J, Strachan C, Simpson GJ. Incoherent Nonreciprocal Absorbance Circular Dichroism of Uniaxial Assemblies. J Phys Chem B 2023; 127:8216-8225. [PMID: 37722139 DOI: 10.1021/acs.jpcb.3c03104] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/20/2023]
Abstract
Analytical theory is proposed predicting remarkably large and fully electric-dipole-allowed circular dichroism (CD) in electronic ultraviolet-visible (UV-vis) absorbance spectroscopy of uniaxial surface assemblies. Partial depolarization of the transmitted beam provides a pathway for surface-specific and chiral-specific dissymmetry parameters that are orders of magnitude greater than those from analogous measurements of isotropic systems. Predictions of the model generated using ab initio quantum chemical calculations with no adjustable parameters agreed with UV-vis absorbance CD measurements of naproxen microcrystals prepared on hydrophilic substrates. Notably, these calculations correctly predicted (i) the key spectroscopic features, (ii) the relative magnitudes of chiral-specific peaks in the CD spectrum, (iii) the absolute CD sign, and (iv) the reciprocal CD sign inversion arising from sample reorientation in the instrument. These results connect the molecular structure and orientation to large CD observable in oriented thin-film assemblies, with the potential for further extension to broad classes of chiral-specific spectral analyses.
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Affiliation(s)
- Gwendylan A Turner
- Department of Chemistry, Purdue University, West Lafayette, Indiana 47907, United States
| | - Yechan Hwang
- Department of Chemistry, Purdue University, West Lafayette, Indiana 47907, United States
| | - Jiayue Rong
- Department of Chemistry, Purdue University, West Lafayette, Indiana 47907, United States
| | - Camila Strachan
- Department of Chemistry, Purdue University, West Lafayette, Indiana 47907, United States
| | - Garth J Simpson
- Department of Chemistry, Purdue University, West Lafayette, Indiana 47907, United States
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3
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Yao Y, Ugras TJ, Meyer T, Dykes M, Wang D, Arbe A, Bals S, Kahr B, Robinson RD. Extracting Pure Circular Dichroism from Hierarchically Structured CdS Magic Cluster Films. ACS NANO 2022; 16:20457-20469. [PMID: 36395373 DOI: 10.1021/acsnano.2c06730] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Chiroptically active, hierarchically structured materials are difficult to accurately characterize due to linear anisotropic contributions (i.e., linear dichroism (LD) and linear birefringence (LB)) and parasitic ellipticities that produce artifactual circular dichroism (CD) signals, in addition to chiral analyte contributions ranging from molecular-scale clusters to micron-sized assemblies. Recently, we have shown that CdS magic-sized clusters (MSC) can self-assemble into ordered films that have a hierarchical structure spanning seven orders of length-scale. These films have a strong CD response, but the chiral origins are obfuscated by the hierarchical architecture and LDLB contributions. Here, we derive and demonstrate a method for extracting the "pure" CD signal (CD generated by structural dissymmetry) from hierarchical MSC films and identified the chiral origin. The theory behind the method is derived using Mueller matrix and Stokes vector conventions and verified experimentally before being applied to hierarchical MSC and nanoparticle films with varying macroscopic orderings. Each film's extracted "true CD" shares a bisignate profile aligned with the exciton peak, indicating the assemblies adopt a chiral arrangement and form an exciton coupled system. Interestingly, the linearly aligned MSC film possesses one of the highest g-factors (0.05) among semiconducting nanostructures reported. Additionally, we find that films with similar electronic transition dipole alignment can possess greatly different g-factors, indicating chirality change rather than anisotropy is the cause of the difference in the CD signal. The difference in g-factor is controllable via film evaporation geometry. This study provides a simple means to measure "true" CD and presents an example of experimentally understanding chiroptic interactions in hierarchical nanostructures.
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Affiliation(s)
- Yuan Yao
- Department of Materials Science and Engineering, Cornell University, Ithaca, New York14853, United States
| | - Thomas J Ugras
- School of Applied and Engineering Physics, Cornell University, Ithaca, New York14853, United States
- Kavli Institute at Cornell for Nanoscale Science, Ithaca, New York14853, United States
| | - Talisi Meyer
- Department of Materials Science and Engineering, Cornell University, Ithaca, New York14853, United States
| | - Matthew Dykes
- Department of Physics, Cornell University, Ithaca, New York14853, United States
| | - Da Wang
- Electron Microscopy for Materials Science (EMAT) and NANOlab Center of Excellence, University of Antwerp, 2020Antwerp, Belgium
| | - Arantxa Arbe
- Centro de Física de Materiales (CSIC, UPV/EHU) and Materials Physics Center MPC, Paseo Manuel de Lardizabal 5, E-20018San Sebastián, Spain
| | - Sara Bals
- Electron Microscopy for Materials Science (EMAT) and NANOlab Center of Excellence, University of Antwerp, 2020Antwerp, Belgium
| | - Bart Kahr
- Department of Chemistry and Molecular Design Institute, New York University, New York City, New York10003, United States
| | - Richard D Robinson
- Department of Materials Science and Engineering, Cornell University, Ithaca, New York14853, United States
- Kavli Institute at Cornell for Nanoscale Science, Ithaca, New York14853, United States
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4
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Salij A, Goldsmith RH, Tempelaar R. Theory of Apparent Circular Dichroism Reveals the Origin of Inverted and Noninverted Chiroptical Response under Sample Flipping. J Am Chem Soc 2021; 143:21519-21531. [PMID: 34914380 DOI: 10.1021/jacs.1c06752] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Circular dichroism (CD) finds widespread application as an optical probe for the structure of molecules and supramolecular assemblies. Its underlying chiral light-matter interactions effectively couple between photonic spin states and select quantum-mechanical degrees of freedom in a sample, implying an intricate connection with photon-to-matter quantum transduction. However, effective transduction implementations likely require interactions that are antisymmetric with respect to the direction of light propagation through the sample, yielding an inversion of the chiroptical response upon sample flipping, which is uncommon for CD. Recent experiments on organic thin films have demonstrated such chiroptical behavior, which was attributed to "apparent CD" resulting from an interference between the sample's linear birefringence and linear dichroism. However, a theory connecting the underlying optical selection rules to the microscopic electronic structure of the constituent molecules remains to be formulated. Here, we present such a theory based on a combination of Mueller calculus and a Lorentz oscillator model. The theory reaches good agreement with experimental CD spectra and allows for establishing the (supra)molecular design rules for maximizing or minimizing this chiroptical effect. It furthermore highlights that, in addition to antisymmetrically, it can manifest symmetrically such that no chiroptical response inversion occurs, which is a consequence of a helical stacking of molecules in the light propagation direction.
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Affiliation(s)
- Andrew Salij
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Randall H Goldsmith
- Department of Chemistry, University of Wisconsin-Madison, Madison, Wisconsin 53706-1322, United States
| | - Roel Tempelaar
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
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5
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Dong B, Liu J, Xue M, Ni Z, Guo Y, Huang Z, Zhang Z. One-Fold Anisotropy of Silver Chiral Nanoparticles Studied by Second-Harmonic Generation. ACS Sens 2021; 6:454-460. [PMID: 33332104 DOI: 10.1021/acssensors.0c02031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Second-harmonic generation (SHG) integrated with diverse nonlinear optical activity characterization has high sensitivity to detect the symmetry of materials at an interface, but the study is in its infancy. Here, we employ SHG with linear dichroism (or SHG-LD) to study the chiroptical origin of silver (Ag) chiral nanoparticles (CNPs) deposited by glancing angle deposition (GLAD). It is found that Ag CNPs show the chiroptical activity ascribed to not only the structural chirality (i.e., atomically chiral lattices) but also one-fold anisotropy at an interface due to the substrate rotation during GLAD. Therefore, the SHG-LD shows great potential to provide valuable complementary information to study the chiroptical properties of chiral metamaterials.
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Affiliation(s)
- Bin Dong
- Beijing National Laboratory of Molecular Sciences, State Key Laboratory of Molecular Reaction Dynamics, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- University of the Chinese Academy of Sciences, Beijing 100049, China
| | - Junjun Liu
- Department of Physics, Hong Kong Baptist University (HKBU), Kowloon Tong, Kowloon, Hong Kong SAR, China
- HKBU Institute of Research and Continuing Education, Shenzhen, Guangdong 518057, China
| | - Man Xue
- Beijing National Laboratory of Molecular Sciences, State Key Laboratory of Molecular Reaction Dynamics, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- University of the Chinese Academy of Sciences, Beijing 100049, China
| | - Ziyue Ni
- Department of Physics, Hong Kong Baptist University (HKBU), Kowloon Tong, Kowloon, Hong Kong SAR, China
| | - Yuan Guo
- Beijing National Laboratory of Molecular Sciences, State Key Laboratory of Molecular Reaction Dynamics, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- University of the Chinese Academy of Sciences, Beijing 100049, China
| | - Zhifeng Huang
- Department of Physics, Hong Kong Baptist University (HKBU), Kowloon Tong, Kowloon, Hong Kong SAR, China
- HKBU Institute of Research and Continuing Education, Shenzhen, Guangdong 518057, China
- Institute of Advanced Materials, State Key Laboratory of Environmental and Biological Analysis, Golden Meditech Centre for NeuroRegeneration Sciences, HKBU, Kowloon Tong, Kowloon, Hong Kong SAR, China
| | - Zhen Zhang
- Beijing National Laboratory of Molecular Sciences, State Key Laboratory of Molecular Reaction Dynamics, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- University of the Chinese Academy of Sciences, Beijing 100049, China
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6
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Ristow F, Scheffel J, Xu X, Fehn N, Oberhofer KE, Riemensberger J, Mortaheb F, Kienberger R, Heiz U, Kartouzian A, Iglev H. Understanding laser desorption with circularly polarized light. Chirality 2020; 32:1341-1353. [PMID: 33091214 DOI: 10.1002/chir.23279] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2020] [Revised: 08/25/2020] [Accepted: 09/07/2020] [Indexed: 01/19/2023]
Abstract
We present aspects of emerging optical activity in thin racemic 1,1'-Bi-2-naphthol films upon irradiation with circularly polarized light and subsequent resonant two-photon absorption in the sample. Thorough analysis of the sample morphology is conducted by means of (polarization-resolved) optical microscopy and scanning electron microscopy (SEM). The influence of crystallization on the nonlinear probing technique (second harmonic generation circular dichroism [SHG-CD]) is investigated. Optical activity and crystallization are brought together by a systematic investigation in different crystallization regimes. We find crystallization to be responsible for two counter-acting effects, which arise for different states of crystallization. Measuring crystallized samples offers the best signal-to-noise ratio, but it limits generation of optical activity due to self-assembly effects. For suppression of crystallization on the other hand, there is a clear indication that enantiomeric selective desorption is responsible for the generation of optical activity in the sample. We reach the current resolution limit of probing with SHG-CD, as we suppress the crystallization in the racemic sample during desorption. In addition, intensity-dependent measurements on the induced optical activity reveal an onset threshold (≈0.7 TW cm-2), above which higher order nonlinear processes impair the generation of optical activity by desorption with CPL.
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Affiliation(s)
- Florian Ristow
- Physik-Department E11, Technische Universität München, Garching, Germany
| | - Jakob Scheffel
- Physik-Department E11, Technische Universität München, Garching, Germany
| | - Xuqiang Xu
- Catalysis Research Center and Chemistry Department, Physical Chemistry, Technical University of Munich, Garching, Germany
| | - Natalie Fehn
- Catalysis Research Center and Chemistry Department, Physical Chemistry, Technical University of Munich, Garching, Germany
| | - Katrin E Oberhofer
- Physik-Department E11, Technische Universität München, Garching, Germany
| | | | - Farinaz Mortaheb
- Catalysis Research Center and Chemistry Department, Physical Chemistry, Technical University of Munich, Garching, Germany
| | | | - Ulrich Heiz
- Catalysis Research Center and Chemistry Department, Physical Chemistry, Technical University of Munich, Garching, Germany
| | - Aras Kartouzian
- Catalysis Research Center and Chemistry Department, Physical Chemistry, Technical University of Munich, Garching, Germany
| | - Hristo Iglev
- Physik-Department E11, Technische Universität München, Garching, Germany
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7
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Albano G, Pescitelli G, Di Bari L. Chiroptical Properties in Thin Films of π-Conjugated Systems. Chem Rev 2020; 120:10145-10243. [PMID: 32892619 DOI: 10.1021/acs.chemrev.0c00195] [Citation(s) in RCA: 235] [Impact Index Per Article: 58.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Chiral π-conjugated molecules provide new materials with outstanding features for current and perspective applications, especially in the field of optoelectronic devices. In thin films, processes such as charge conduction, light absorption, and emission are governed not only by the structure of the individual molecules but also by their supramolecular structures and intermolecular interactions to a large extent. Electronic circular dichroism, ECD, and its emission counterpart, circularly polarized luminescence, CPL, provide tools for studying aggregated states and the key properties to be sought for designing innovative devices. In this review, we shall present a comprehensive coverage of chiroptical properties measured on thin films of organic π-conjugated molecules. In the first part, we shall discuss some general concepts of ECD, CPL, and other chiroptical spectroscopies, with a focus on their applications to thin film samples. In the following, we will overview the existing literature on chiral π-conjugated systems whose thin films have been characterized by ECD and/or CPL, as well other chiroptical spectroscopies. Special emphasis will be put on systems with large dissymmetry factors (gabs and glum) and on the application of ECD and CPL to derive structural information on aggregated states.
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Affiliation(s)
- Gianluigi Albano
- Dipartimento di Chimica e Chimica Industriale, Università di Pisa, Via Giuseppe Moruzzi 13, 56124 Pisa, Italy
| | - Gennaro Pescitelli
- Dipartimento di Chimica e Chimica Industriale, Università di Pisa, Via Giuseppe Moruzzi 13, 56124 Pisa, Italy
| | - Lorenzo Di Bari
- Dipartimento di Chimica e Chimica Industriale, Università di Pisa, Via Giuseppe Moruzzi 13, 56124 Pisa, Italy
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8
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Zinna F, Albano G, Taddeucci A, Colli T, Aronica LA, Pescitelli G, Di Bari L. Emergent Nonreciprocal Circularly Polarized Emission from an Organic Thin Film. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2020; 32:e2002575. [PMID: 32734682 DOI: 10.1002/adma.202002575] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/15/2020] [Revised: 06/30/2020] [Indexed: 06/11/2023]
Abstract
Controlling circularly polarized (CP) emission is key for both fundamental understanding and applications in the field of chiral photonics and electronics. Here, a completely new way to achieve this goal is presented. A luminescent thin film, made from a chiral conjugated phenylene bis-thiophenylpropynone able to self-assemble into ordered structures, emits highly circularly polarized light with opposite handedness from its two opposite faces. Such emergent nonreciprocal behavior in CP emission, so far unprecedented, represents a fundamental advance, opening new opportunities in design, preparation, and applications of CP emitting materials.
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Affiliation(s)
- Francesco Zinna
- Dipartimento di Chimica e Chimica Indistriale, Università Di Pisa, via Moruzzi 13, Pisa, 56124, Italy
- CISUP, Centro per l'Integrazione della Strumentazione dell'Università di Pisa, Lungarno Pacinotti 43, Pisa, 56126, Italy
| | - Gianluigi Albano
- Dipartimento di Chimica e Chimica Indistriale, Università Di Pisa, via Moruzzi 13, Pisa, 56124, Italy
| | - Andrea Taddeucci
- Dipartimento di Chimica e Chimica Indistriale, Università Di Pisa, via Moruzzi 13, Pisa, 56124, Italy
| | - Tony Colli
- Dipartimento di Chimica e Chimica Indistriale, Università Di Pisa, via Moruzzi 13, Pisa, 56124, Italy
| | - Laura Antonella Aronica
- Dipartimento di Chimica e Chimica Indistriale, Università Di Pisa, via Moruzzi 13, Pisa, 56124, Italy
- CISUP, Centro per l'Integrazione della Strumentazione dell'Università di Pisa, Lungarno Pacinotti 43, Pisa, 56126, Italy
| | - Gennaro Pescitelli
- Dipartimento di Chimica e Chimica Indistriale, Università Di Pisa, via Moruzzi 13, Pisa, 56124, Italy
- CISUP, Centro per l'Integrazione della Strumentazione dell'Università di Pisa, Lungarno Pacinotti 43, Pisa, 56126, Italy
| | - Lorenzo Di Bari
- Dipartimento di Chimica e Chimica Indistriale, Università Di Pisa, via Moruzzi 13, Pisa, 56124, Italy
- CISUP, Centro per l'Integrazione della Strumentazione dell'Università di Pisa, Lungarno Pacinotti 43, Pisa, 56126, Italy
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9
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Zinna F, Pescitelli G, Di Bari L. Circularly polarized light at the mirror: Caveats and opportunities. Chirality 2020; 32:765-769. [PMID: 32162387 DOI: 10.1002/chir.23217] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2019] [Revised: 02/22/2020] [Accepted: 02/25/2020] [Indexed: 11/06/2022]
Abstract
Moving from the simple concept that reflection onto a mirror surface changes the handedness of circularly polarized light, we describe what happens to the emergent polarization in two different cases after reflection on a back mirror. In the first case, a regular emitter is taken into account, where reflection has the effect to destroy the emergent polarization. In the second case, we show what could happen when a hypothetical apparently non-reciprocal emitting material undergoes a similar experiment. These simple concepts have important implications in the design of efficient circularly polarized emitting devices.
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Affiliation(s)
- Francesco Zinna
- Dipartimento di Chimica e Chimica Industriale, University of Pisa, Pisa, Italy
| | - Gennaro Pescitelli
- Dipartimento di Chimica e Chimica Industriale, University of Pisa, Pisa, Italy
| | - Lorenzo Di Bari
- Dipartimento di Chimica e Chimica Industriale, University of Pisa, Pisa, Italy
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10
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Mortaheb F, Oberhofer K, Riemensberger J, Ristow F, Kienberger R, Heiz U, Iglev H, Kartouzian A. Enantiospecific Desorption Triggered by Circularly Polarized Light. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201906630] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Farinaz Mortaheb
- Catalysis Research Center and Chemistry Department Chair of Physical Chemistry Technische Universität München Lichtenbergstr. 4 85748 Garching Germany
| | - Katrin Oberhofer
- Physik-Department E11 Technische Universität München James-Franck-Str. 1 85748 Garching Germany
| | - Johann Riemensberger
- Physik-Department E11 Technische Universität München James-Franck-Str. 1 85748 Garching Germany
| | - Florian Ristow
- Physik-Department E11 Technische Universität München James-Franck-Str. 1 85748 Garching Germany
| | - Reinhard Kienberger
- Physik-Department E11 Technische Universität München James-Franck-Str. 1 85748 Garching Germany
| | - Ulrich Heiz
- Catalysis Research Center and Chemistry Department Chair of Physical Chemistry Technische Universität München Lichtenbergstr. 4 85748 Garching Germany
| | - Hristo Iglev
- Physik-Department E11 Technische Universität München James-Franck-Str. 1 85748 Garching Germany
| | - Aras Kartouzian
- Catalysis Research Center and Chemistry Department Chair of Physical Chemistry Technische Universität München Lichtenbergstr. 4 85748 Garching Germany
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11
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Mortaheb F, Oberhofer K, Riemensberger J, Ristow F, Kienberger R, Heiz U, Iglev H, Kartouzian A. Enantiospecific Desorption Triggered by Circularly Polarized Light. Angew Chem Int Ed Engl 2019; 58:15685-15689. [PMID: 31393661 PMCID: PMC6851867 DOI: 10.1002/anie.201906630] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2019] [Revised: 07/18/2019] [Indexed: 11/09/2022]
Abstract
The interest in enantioseparation and enantiopurification of chiral molecules has been drastically increasing over the past decades, since these are important steps in various disciplines such as pharmaceutical industry, asymmetric catalysis, and chiral sensing. By exposing racemic samples of BINOL (1,1′‐bi‐2‐naphthol) coated onto achiral glass substrates to circularly polarized light, we unambiguously demonstrate that by controlling the handedness of circularly polarized light, preferential desorption of enantiomers can be achieved. There are currently no mechanisms known that would describe this phenomenon. Our observation together with a simplified phenomenological model suggests that the process of laser desorption needs to be further developed and the contribution of quantum mechanical processes should be revisited to account for these data. Asymmetric laser desorption provides us with a contamination‐free technique for the enantioenrichment of chiral compounds.
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Affiliation(s)
- Farinaz Mortaheb
- Catalysis Research Center and Chemistry Department, Chair of Physical Chemistry, Technische Universität München, Lichtenbergstr. 4, 85748, Garching, Germany
| | - Katrin Oberhofer
- Physik-Department E11, Technische Universität München, James-Franck-Str. 1, 85748, Garching, Germany
| | - Johann Riemensberger
- Physik-Department E11, Technische Universität München, James-Franck-Str. 1, 85748, Garching, Germany
| | - Florian Ristow
- Physik-Department E11, Technische Universität München, James-Franck-Str. 1, 85748, Garching, Germany
| | - Reinhard Kienberger
- Physik-Department E11, Technische Universität München, James-Franck-Str. 1, 85748, Garching, Germany
| | - Ulrich Heiz
- Catalysis Research Center and Chemistry Department, Chair of Physical Chemistry, Technische Universität München, Lichtenbergstr. 4, 85748, Garching, Germany
| | - Hristo Iglev
- Physik-Department E11, Technische Universität München, James-Franck-Str. 1, 85748, Garching, Germany
| | - Aras Kartouzian
- Catalysis Research Center and Chemistry Department, Chair of Physical Chemistry, Technische Universität München, Lichtenbergstr. 4, 85748, Garching, Germany
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12
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Kartouzian A. Spectroscopy for model heterogeneous asymmetric catalysis. Chirality 2019; 31:641-657. [PMID: 31318108 DOI: 10.1002/chir.23113] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2019] [Accepted: 07/02/2019] [Indexed: 12/31/2022]
Abstract
Heterogeneous catalysis has vastly benefited from investigations performed on model systems under well-controlled conditions. The application of most of the techniques utilized for such studies is not feasible for asymmetric reactions as enantiomers possess identical physical and chemical properties unless while interacting with polarized light and other chiral entities. A thorough investigation of a heterogeneous asymmetric catalytic process should include probing the catalyst prior to, during, and after the reaction as well as the analysis of reaction products to evaluate the achieved enantiomeric excess. I present recent studies that demonstrate the strength of chiroptical spectroscopic methods to tackle the challenges in investigating model heterogeneous asymmetric catalysis covering all the abovementioned aspects.
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Affiliation(s)
- Aras Kartouzian
- Lehrstuhl für physikalische Chemie, Catalysis Research Center, Technische Universität München, Garching bei München, Germany
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