Manipulating Magneto-Optic Properties of a Chiral Polymer by Doping with Stable Organic Biradicals

Lim, Chang Keun; Cho, Min Ju; Singh, Ajay; Li, Qi; Kim, Won Jin; Jee, Hong Sub; Fillman, Kathlyn L.; Carpenter, Stephanie H.; Neidig, Michael L.; Baev, Alexander; Swihart, Mark T.; Prasad, Paras N.

doi:10.1021/acs.nanolett.6b01874

Cited by 32 publications

(34 citation statements)

References 24 publications

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“…Chemie y(dialkyfluorene)/radical composites, [23] and small molecule liquid crystals [24] (Figure 10). Thep hysics governing these large effects are far from understood;h owever, the fact that materials have been discovered that have V values more than 20 times larger than conventional materials suggests that there may be some big advances on the horizon, by which these cost-effective magneto-optical materials could be used as transducers for biosensing or even in magnetometry.…”

Section: Methodsmentioning

confidence: 99%

Sensor Technologies Empowered by Materials and Molecular Innovations

Swager

2018

Angew Chem Int Ed

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Functional synthetic designer materials can impact many advanced technologies, and the chemical sensor area is intimately reliant on these new chemical innovations. The transduction of chemical and biological signals is necessary for low cost omnipresent chemical sensing and will be realized by chemical designs of new transduction materials. We are poised for many new innovations to empower new generations of sensor technologies. Materials innovations promise to expand the capabilities of present hardware, drive down the cost, and ensure broad implementation of these methods.

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Section: Methodsmentioning

confidence: 99%

Sensor Technologies Empowered by Materials and Molecular Innovations

Swager

2018

Angew Chem Int Ed

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“…Thus, it is expected that the organic chiral charge-transfer magnets have enormous potential for the application of optical communication and polarized light detection. To further enhance the magneto-optic effect, [8] organic chiral materials with a high spin state density www.advopticalmat.de nw-P3HT are also studied. Utilizing H-bonding or other weak interactions could fabricate chiral structures via long-range supramolecular self-assembly, [1] and this concept has attracted great interest given the relationship to biological structures, the specific physical and chemical properties in optical materials, [2] for example, circular dichroism, [3] and the prospect of circularly polarized light detection.…”

Section: Polarized Light-manipulated Magnetization Of Organic Chiral mentioning

confidence: 99%

“…Furthermore, the thermostability ( Figure S3, Supporting Information) and X-ray diffraction (XRD; Figure S4, Supporting Information) of chiral In this work, room-temperature organic chiral helical charge-transfer ferromagnets are fabricated with a high thermal stability. To further enhance the magneto-optic effect, [8] organic chiral materials with a high spin state density Under the stimulus of light, both right-handed and left-handed circularly polarized light can enhance the magnetization performance in chiral helical charge-transfer magnets compared with linearly polarized light with an identical intensity.…”

mentioning

confidence: 99%

“…Utilizing H-bonding or other weak interactions could fabricate chiral structures via long-range supramolecular self-assembly, [1] and this concept has attracted great interest given the relationship to biological structures, the specific physical and chemical properties in optical materials, [2] for example, circular dichroism, [3] and the prospect of circularly polarized light detection. To further enhance the magneto-optic effect, [8] organic chiral materials with a high spin state density The CISS is achieved due to the special property of chiral symmetry that couples an electron's spin and orbital angular momentum so that one type of spin is preferred for transport in the direction in which local spin polarization can be generated.…”

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confidence: 99%

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Polarized Light‐Manipulated Magnetization of Organic Chiral Magnets

Gao

Wang

Qin

2019

Advanced Optical Materials

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have been fabricated, [9] implying that chiral materials with ferromagnetism can enhance the coupling between light and spin. In 2008, Train et al. designed and fabricated organic ferromagnetic materials [N(CH 3 )(n-C 3 H 7 ) 2 (s-C 4 H 9 )][MnCr(ox) 3 ], in which chirality shakes hands with magnetism with a T C of 7 K. [10] The magnetochiral dichroic effect can be enhanced by a factor of 17 when it enters into the ferromagnetic phase. In addition, organic ferromagnetism can be realized with specific molecular structures, [11] and some of them can be processed above the room-temperature Curie temperature. [12] Thus, it is possible to fabricate organic room-temperature ferromagnets with pronounced magneto-optic coupling effects, which can be used to enable a faster and less dissipative magnetic random access memory [13] and an all-optical manipulation of the magnetization in magnetooptical recording. [14] To date, self-assembly can build up organic charge-transfer networks with different dimensions to promote simultaneous dipoles and spin ordering, [15] such as ferromagnetic charge-transfer complexes tetrakis(dimethylamino)ethylene (TDAE):C 60 , [16] ferroelectric tetrathiafulvalene-p-bromanil (TTF:BA), [17] and magnetoelectric charge-transfer compound k-(ET) 2 Cu[N(CN) 2 ]Cl. [18] Thus, inspired by the progress of self-assembled organic charge-transfer networks, we attempted to screw organic crystals to a chiral helical structure and fabricate pure room-temperature organic chiral helical magnets without transition metal doping.In this work, we design and fabricate organic chiral chargetransfer magnets, for which chirality is characterized via both transmission electron microscopy (TEM) and a circular dichroism (CD) spectrometer. Ferromagnetism is studied with a superconducting quantum interference device. Organic chargetransfer magnets possess a high thermal stability and display a pronounced optomagnetic effect at room temperature. Importantly, linearly and circularly polarized lights with identical intensities are used to study polarized light-dependent magnetization and magnetoelectric coupling in chiral charge-transfer magnets.As shown in Figure 1a, a chiral poly(3-hexylthiophene-2,5-diyl) nanowire (nw-P3HT) is fabricated and characterized via TEM. To optimize the performance of the chirality, different concentrations of nw-P3HT ( Figure S1, Supporting Information) and N, N′-dipentyl-3,4,9,10-perylenedicarboximide (PTCDI; Figure S2, Supporting Information) are studied, as presented in the Supporting Information. Furthermore, the thermostability ( Figure S3, Supporting Information) and X-ray diffraction (XRD; Figure S4, Supporting Information) of chiral In this work, room-temperature organic chiral helical charge-transfer ferromagnets are fabricated with a high thermal stability. Compared with achiral ferromagnets, involving chirality-generated orbital angular momentum in chiral magnets will increase the value of magnetization. Under the stimulus of light, both right-handed and left-handed circularly polarized...

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“…[2][3][4]. Traditionally the field of magneto-optics has been dominated by inorganic materials or radical species [5][6][7][8]. Only recently have diamagnetic organic materials emerged as novel FR supplies [9][10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Thin Films of Tolane Aggregates for Faraday Rotation: Materials and Measurement

et al. 2019

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We present organic, diamagnetic materials based on structurally simple (hetero-)tolane derivatives. They form crystalline thin-film aggregates that are suitable for Faraday rotation (FR) spectroscopy. The resulting new materials are characterized appropriately by common spectroscopic (NMR, UV-Vis), microscopy (POM), and XRD techniques. The spectroscopic studies give extremely high FR activities, thus making these materials promising candidates for future practical applications. Other than a proper explanation, we insist on the complexity of designing efficient FR materials starting from single molecules.In the present work, we present tolane structures that form crystalline thin films and assess their MO activity by FR spectroscopy (Figure 1). Coatings 2019, 9, x FOR PEER REVIEW 2 of 6 M.E.; investigation, M.E.; Resources: LC: T.V. and M.E., Synthesis, I.L.-D. and G.H.; data curation, M.E.; writing-original draft preparation, M.E. and T.V.; writing-review and editing, M.E., T.V. and G.H.; visualization, M.E. and G.H.; supervision, M.E. and G.H. and T.V., project administration, M.E. and G.H.; funding acquisition, G.H and T.V. All authors have given approval to the final version of the manuscript.

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Manipulating Magneto-Optic Properties of a Chiral Polymer by Doping with Stable Organic Biradicals

Cited by 32 publications

References 24 publications

Sensor Technologies Empowered by Materials and Molecular Innovations

Sensor Technologies Empowered by Materials and Molecular Innovations

Polarized Light‐Manipulated Magnetization of Organic Chiral Magnets

Thin Films of Tolane Aggregates for Faraday Rotation: Materials and Measurement

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