Natural and induced optical activity of ferroelectric crystals posessing ordering structure units

Stasyuk, I. V.; Kotsur, S. S.; Stetsiv, R. Ya.

doi:10.1080/07315178808200663

Cited by 6 publications

(6 citation statements)

References 3 publications

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“…Its chiroptical properties are attractive for study because it has a number of isomorphs to which it can be compared. From Table 2 it is hard to discern firm trends among the family of KDP crystals 19,84…”

Section: Measurement Of Optical Rotation In Achiral Crystalsmentioning

confidence: 99%

Optical Rotation of Achiral Compounds

et al. 2008

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Oriented achiral molecules and crystals with D(2d) symmetry or one of its non-enantiomorphous subgroups, S(4), C(2v), or C(s), can rotate the plane of transmitted polarized light incident in a general direction. This well-established fact of crystal optics is contrary to the teaching of optical activity to students of organic chemistry. This Minireview gives an overview of the measurement and calculation of the chiroptical properties of some achiral compounds and crystals. Methane derivatives with four identical ligands related by reflection symmetry are quintessential optically inactive compounds according to the logic of van't Hoff. Analysis of the optical activity of simple achiral compounds such as H(2)O and NH(3) provides general aspects of chiroptics that are not readily broached when considering chiral compounds exclusively. We show here, through the use of group theoretical arguments, the transformation properties of tensors, and diagrams, why some achiral, acentric compounds are optically active while others are not.

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Section: Measurement Of Optical Rotation In Achiral Crystalsmentioning

confidence: 99%

Optical Rotation of Achiral Compounds

et al. 2008

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“…As polar materials, ferroelectrics should crystallize in the ten polar point groups ( C 1 , C 2 , C s , C 2 v , C 4 , C 4 v , C 3 , C 3 v , C 6 , C 6 v ), seven of which, including five enantiomorphic groups ( C 1 , C 2 , C 4 , C 3 , C 6 ,) and two non-enantiomorphic groups ( C s , C 2 v ), are optically active3. Because ferroelectric phase transitions and ferroelectric polarization reversal are accompanied by the change of the chirality of the crystals in many cases, ferroelectric optical activity is of importance for practical applications and the understanding of phase transition mechanisms45678910.…”

mentioning

confidence: 99%

Anomalously rotary polarization discovered in homochiral organic ferroelectrics

et al. 2016

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Molecular ferroelectrics are currently an active research topic in the field of ferroelectric materials. As complements or alternatives of conventional inorganic ferroelectrics, they have been designed to realize various novel properties, ranging from multiferroicity and semiconductive ferroelectricity to ferroelectric photovoltaics and ferroelectric luminescence. The stabilizing of ferroelectricity in various systems is owing to the flexible tailorability of the organic components. Here we describe the construction of optically active molecular ferroelectrics by introducing homochiral molecules as polar groups. We find that the ferroelectricity in (R)-(−)-3-hydroxlyquinuclidinium halides is due to the alignment of the homochiral molecules. We observe that both the specific optical rotation and rotatory direction change upon paraelectric-ferroelectric phase transitions, due to the existence of two origins from the molecular chirality and spatial arrangement, whose contributions vary upon the transitions. The optical rotation switching effect may find applications in electro-optical elements.

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“…The data were obtained for the (100) plates of pure and doped KDP crystals at a wavelength = 633 nm. The change in the phase difference À was achieved by heating the samples from 300 to 350 K. The ellipticity k of the eigenwaves was considered constant since the very weak temperature dependence of the OA of KDP crystals at room temperature was confirmed earlier both experimentally (Takada et al, 1989;Shopa et al, 2005) and theoretically (Stasyuk et al, 1988). This simplifies the processing of the experimental results and makes it possible to determine systematic errors by linear approximation following relations (6) and (7).…”

Section: Conventional Haup Experimentsmentioning

confidence: 99%

“…In the KDP group of crystals there are ample opportunities for varying chemical composition and deuteration (replacement of hydrogen by deuterium) without altering the symmetry, although the measurement of OA in the birefringent directions of these crystals is more complicated. The ionic, crystalline and mixed contributions to the gyration tensors from the various configurations of H n PO 4 ionic groups have been considered theoretically for KDP crystals (Stasyuk et al, 1988). The configurations of H n PO 4 groups are determined by the number and positions of the protons in the hydrogen bonds.…”

Section: Figurementioning

confidence: 99%

Polarimetric studies of L-arginine-doped potassium dihydrogen phosphate single crystals

Shopa

Shribak

et al. 2020

J Appl Cryst

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Conoscopic interference patterns, channelled spectra and polarimetric techniques have been used for the characterization of pure and doped (with L-arginine amino acid) potassium dihydrogen phosphate (KDP) single crystals. Experimental polarimetric data have been obtained for the frequently used wavelength of 633 nm and for two close wavelengths of 532 and 543 nm in a high-accuracy dual-wavelength polarimeter. The measurement of eigenwave ellipticity in the [100] and [010] directions and between 295 and 340 K shows small differences in the absolute values of the specific optical rotations of KDP crystals doped with L-arginine in the range of 0.7–3.8 wt%. It is found that the gyration tensor component g 11, specific optical rotation and eigenwave ellipticity show different dispersion in the visible spectral region.

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Natural and induced optical activity of ferroelectric crystals posessing ordering structure units

Cited by 6 publications

References 3 publications

Optical Rotation of Achiral Compounds

Optical Rotation of Achiral Compounds

Anomalously rotary polarization discovered in homochiral organic ferroelectrics

Polarimetric studies of L-arginine-doped potassium dihydrogen phosphate single crystals

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