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Han C, Bradford AJ, McNulty JA, Zhang W, Halasyamani PS, Slawin AMZ, Morrison FD, Lee SL, Lightfoot P. Polarity and Ferromagnetism in Two-Dimensional Hybrid Copper Perovskites with Chlorinated Aromatic Spacers. Chem Mater 2022; 34:2458-2467. [PMID: 35431437 PMCID: PMC9008537 DOI: 10.1021/acs.chemmater.2c00107] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/12/2022] [Revised: 02/08/2022] [Indexed: 06/13/2023]
Abstract
Two-dimensional (2D) organic-inorganic hybrid copper halide perovskites have drawn tremendous attention as promising multifunctional materials. Herein, by incorporating ortho-, meta-, and para-chlorine substitutions in the benzylamine structure, we first report the influence of positional isomerism on the crystal structures of chlorobenzylammonium copper(II) chloride perovskites A2CuCl4. 2D polar ferromagnets (3-ClbaH)2CuCl4 and (4-ClbaH)2CuCl4 (ClbaH+ = chlorobenzylammonium) are successfully obtained. They both adopt a polar monoclinic space group Cc at room temperature, displaying significant differences in crystal structures. In contrast, (2-ClbaH)2CuCl4 adopts a centrosymmetric space group P 21/ c at room temperature. This associated structural evolution successfully enhances the physical properties of the two polar compounds with high thermal stability, discernible second harmonic generation (SHG) signals, ferromagnetism, and narrow optical band gaps. These findings demonstrate that the introduction of chlorine atoms into the interlayer organic species is a powerful tool to tune crystal symmetries and physical properties, and this inspires further exploration of designing high-performance multifunctional copper-based materials.
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Affiliation(s)
- Ceng Han
- School
of Chemistry and EaStChem, University of
St Andrews, St Andrews KY16 9ST, United Kingdom
| | - Alasdair J. Bradford
- School
of Chemistry and EaStChem, University of
St Andrews, St Andrews KY16 9ST, United Kingdom
- School
of Physics, University of St Andrews, St Andrews, Fife KY16 9SS, United Kingdom
| | - Jason A. McNulty
- School
of Chemistry and EaStChem, University of
St Andrews, St Andrews KY16 9ST, United Kingdom
| | - Weiguo Zhang
- Department
of Chemistry, University of Houston, Houston, Texas 77204, United States
| | - P. Shiv Halasyamani
- Department
of Chemistry, University of Houston, Houston, Texas 77204, United States
| | - Alexandra M. Z. Slawin
- School
of Chemistry and EaStChem, University of
St Andrews, St Andrews KY16 9ST, United Kingdom
| | - Finlay D. Morrison
- School
of Chemistry and EaStChem, University of
St Andrews, St Andrews KY16 9ST, United Kingdom
| | - Stephen L. Lee
- School
of Physics, University of St Andrews, St Andrews, Fife KY16 9SS, United Kingdom
| | - Philip Lightfoot
- School
of Chemistry and EaStChem, University of
St Andrews, St Andrews KY16 9ST, United Kingdom
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Han C, McNulty JA, Bradford AJ, Slawin AMZ, Morrison FD, Lee SL, Lightfoot P. Polar Ferromagnet Induced by Fluorine Positioning in Isomeric Layered Copper Halide Perovskites. Inorg Chem 2022; 61:3230-3239. [PMID: 35138839 PMCID: PMC9007457 DOI: 10.1021/acs.inorgchem.1c03726] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We present the influence of positional isomerism on the crystal structure of fluorobenzylammonium copper(II) chloride perovskites A2CuCl4 by incorporating ortho-, meta-, and para-fluorine substitution in the benzylamine structure. Two-dimensional (2D) polar ferromagnet (3-FbaH)2CuCl4 (3-FbaH+ = 3-fluorobenzylammonium) is successfully obtained, which crystallizes in a polar orthorhombic space group Pca21 at room temperature. In contrast, both (2-FbaH)2CuCl4 (2-FbaH+ = 2-fluorobenzylammonium) and (4-FbaH)2CuCl4 (4-FbaH+ = 4-fluorobenzylammonium) crystallize in centrosymmetric space groups P21/c and Pnma at room temperature, respectively, displaying significant differences in crystal structures. These differences indicate that the position of the fluorine atom is a driver for the polar behavior in (3-FbaH)2CuCl4. Preliminary magnetic measurements confirm that these three perovskites possess dominant ferromagnetic interactions within the inorganic [CuCl4]∞ layers. Therefore, (3-FbaH)2CuCl4 is a polar ferromagnet, with potential as a type I multiferroic. This work is expected to promote further development of high-performance 2D copper(II) halide perovskite multiferroic materials.
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Affiliation(s)
- Ceng Han
- School of Chemistry and EaStChem, University of St Andrews, St Andrews KY16 9ST, U.K
| | - Jason A McNulty
- School of Chemistry and EaStChem, University of St Andrews, St Andrews KY16 9ST, U.K
| | - Alasdair J Bradford
- School of Chemistry and EaStChem, University of St Andrews, St Andrews KY16 9ST, U.K.,School of Physics, University of St Andrews, St Andrews, Fife KY16 9SS, U.K
| | - Alexandra M Z Slawin
- School of Chemistry and EaStChem, University of St Andrews, St Andrews KY16 9ST, U.K
| | - Finlay D Morrison
- School of Chemistry and EaStChem, University of St Andrews, St Andrews KY16 9ST, U.K
| | - Stephen L Lee
- School of Physics, University of St Andrews, St Andrews, Fife KY16 9SS, U.K
| | - Philip Lightfoot
- School of Chemistry and EaStChem, University of St Andrews, St Andrews KY16 9ST, U.K
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Bradford AJ, Yao W, da Silva I, Telling M, Guidi T, Li MD, Lee SL, Lightfoot P. Frustrated magnets with chemically tailorable interactions. Acta Crystallogr A Found Adv 2021. [DOI: 10.1107/s010876732108733x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Clulow R, Bradford AJ, Lee SL, Lightfoot P. Perovzalates: a family of perovskite-related oxalates. Acta Crystallogr A Found Adv 2021. [DOI: 10.1107/s0108767321094101] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Han C, Bradford AJ, Slawin AMZ, Bode BE, Fusco E, Lee SL, Tang CC, Lightfoot P. Structural Features in Some Layered Hybrid Copper Chloride Perovskites: ACuCl 4 or A 2CuCl 4. Inorg Chem 2021; 60:11014-11024. [PMID: 34242021 DOI: 10.1021/acs.inorgchem.1c00705] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We present three new hybrid copper(II) chloride layered perovskites of generic composition ACuCl4 or A2CuCl4, which exhibit three distinct structure types. (m-PdH2)CuCl4 (m-PdH22+ = protonated m-phenylenediamine) adopts a Dion-Jacobson (DJ)-like layered perovskite structure type and exhibits a very large axial thermal contraction effect upon heating, as revealed via variable-temperature synchrotron X-ray powder diffraction (SXRD). This can be attributed to the contraction of an interlayer block, via a slight repositioning of the m-PdH22+ moiety. (3-AbaH)2CuCl4 (3-AbaH+ = protonated 3-aminobenzoic acid) and (4-AbaH)2CuCl4 (4-AbaH+ = protonated 4-aminobenzoic acid) possess the same generic formula as Ruddlesden-Popper (RP) layered perovskites, A2BX4, but adopt different structures. (4-AbaH)2CuCl4 adopts a near-staggered structure type, whereas (3-AbaH)2CuCl4 adopts a near-eclipsed structure type, which resembles the DJ rather than the RP family. (3-AbaH)2CuCl4 also displays static disorder of the [CuCl4]∞ layers. The crystal structures of each are discussed in terms of the differing nature of the templating molecular species, and these are compared to related layered perovskites. Preliminary magnetic measurements are reported, suggesting dominant ferromagnetic interactions.
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Affiliation(s)
- Ceng Han
- School of Chemistry and EaStChem, University of St Andrews, St Andrews, KY16 9ST, United Kingdom
| | - Alasdair J Bradford
- School of Chemistry and EaStChem, University of St Andrews, St Andrews, KY16 9ST, United Kingdom.,School of Physics, University of St Andrews, St Andrews, Fife KY16 9SS, United Kingdom
| | - Alexandra M Z Slawin
- School of Chemistry and EaStChem, University of St Andrews, St Andrews, KY16 9ST, United Kingdom
| | - Bela E Bode
- School of Chemistry and EaStChem, University of St Andrews, St Andrews, KY16 9ST, United Kingdom
| | - Edoardo Fusco
- School of Chemistry and EaStChem, University of St Andrews, St Andrews, KY16 9ST, United Kingdom
| | - Stephen L Lee
- School of Physics, University of St Andrews, St Andrews, Fife KY16 9SS, United Kingdom
| | - Chiu C Tang
- Diamond Light Source Ltd, Didcot, OX11 0DE, United Kingdom
| | - Philip Lightfoot
- School of Chemistry and EaStChem, University of St Andrews, St Andrews, KY16 9ST, United Kingdom
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Myers JN, Bradford AJ, Hallas VS, Lawson LL, Pitcher TE, Dunham RA, Butts IAE. Channel catfish ovarian fluid differentially enhances blue catfish sperm performance. Theriogenology 2020; 149:62-71. [PMID: 32247214 DOI: 10.1016/j.theriogenology.2020.03.022] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2019] [Revised: 02/24/2020] [Accepted: 03/12/2020] [Indexed: 12/12/2022]
Abstract
For externally fertilizing fishes, interactions between male and female gametes have been shown to have remarkable impacts on sperm performance. Ovarian fluid (OF) and its ability to alter the swimming behavior of fish sperm makes it a determining factor of fertility. With the expansion of channel catfish (Ictalurus punctatus) ♀ × blue catfish (Ictalurus furcatus) ♂ hybrid aquaculture, it is essential to understand the impacts during fertilization and the magnitude such gametic interactions have on sperm performance and subsequent male fertility potential. This study was conducted to address the following: 1) activate blue catfish sperm with/without channel catfish OF to determine impacts on sperm performance and 2) assess if sperm behave differently when activated in the OF from individual females. Sperm (n = 4 males) were activated without OF (control) and with diluted OF from unique females (n = 6), creating 24 experimental crosses. Sperm motility (%), velocity (VCL), and longevity were analyzed using computer assisted sperm analyses software. With OF incorporated in the activation media, sperm velocity was significantly higher than the control at 10, 20, and 30 s post-activation. OF did not have an impact on motility for any females at 10 s and 20 s post-activation but became significantly higher than the control at 30 s. In all cases, OF treatments greatly increased longevity. Male × female interactions were highly significant, such that motility, velocity, and longevity were dependent on specific male-female pairs. This information shows that OF should be incorporated in aquatic media to simulate natural spawning conditions and accurately assess the fluid mechanics of sperm propulsion for each male. Additionally, there are mechanisms that drive gamete interactions that need to be explored further, which may improve selection of male-female pairs for in-vitro fertilization. On a broad scale, our results also help to shed light on the complexities of fertilization and fish reproduction overall, which may have implications for recruitment variability and recovery strategies of threatened and/or endangered freshwater species.
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Affiliation(s)
- J N Myers
- School of Fisheries, Aquaculture and Aquatic Sciences, Auburn University, Auburn, AL, 36849, USA.
| | - A J Bradford
- School of Fisheries, Aquaculture and Aquatic Sciences, Auburn University, Auburn, AL, 36849, USA.
| | - V S Hallas
- School of Fisheries, Aquaculture and Aquatic Sciences, Auburn University, Auburn, AL, 36849, USA.
| | - L L Lawson
- School of Fisheries, Aquaculture and Aquatic Sciences, Auburn University, Auburn, AL, 36849, USA.
| | - T E Pitcher
- Great Lakes Institute for Environmental Research, University of Windsor, Windsor, ON N9B 3P4, Canada; Department of Biological Sciences, University of Windsor, Windsor, ON N9B 3P4, Canada.
| | - R A Dunham
- School of Fisheries, Aquaculture and Aquatic Sciences, Auburn University, Auburn, AL, 36849, USA.
| | - I A E Butts
- School of Fisheries, Aquaculture and Aquatic Sciences, Auburn University, Auburn, AL, 36849, USA.
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Abstract
The title compound is the first example of a layered fluoroperovskite containing an interlayer organic cation. Preliminary magnetic characterisation is reported, and structural relationships to related layered perovskites are discussed.
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Affiliation(s)
- Teng Li
- School of Chemistry and EaStChem, University of St Andrews, St Andrews, Fife, KY16 9ST, UK.
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Abstract
The compounds ALi3M(C2O4)3 (A = K, Rb, Cs; M = Fe, Co, Ni) adopt a perovskite-like structure with cations as large as Cs+ in the perovskite A-site.
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Affiliation(s)
- Rebecca Clulow
- School of Chemistry and EaStChem
- University of St Andrews
- St Andrews
- UK
| | - Alasdair J. Bradford
- School of Chemistry and EaStChem
- University of St Andrews
- St Andrews
- UK
- School of Physics
| | | | - Philip Lightfoot
- School of Chemistry and EaStChem
- University of St Andrews
- St Andrews
- UK
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Dransfield DT, Yeh JL, Bradford AJ, Goldenring JR. Identification and characterization of a novel A-kinase-anchoring protein (AKAP120) from rabbit gastric parietal cells. Biochem J 1997; 322 ( Pt 3):801-8. [PMID: 9148752 PMCID: PMC1218258 DOI: 10.1042/bj3220801] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
The type-II cAMP-dependent protein kinase (A-Kinase) partitions primarily into the particulate fraction in gastric parietal cells. Localization of this kinase to particular subcellular domains is mediated through the binding of the regulatory subunit (RII) dimer to A-Kinase-anchoring proteins (AKAPs). Using a [32P]RII overlay assay, we have screened a rabbit gastric parietal cell cDNA library and have isolated a single RII-binding protein clone. Sequence analysis revealed an open reading frame coding for 1022 amino acids (AKAP120). Recombinant fragments of the full-length clone were prepared and the RII-binding region mapped to an area between amino acids 489 and 549. This area contained a putative alpha-helical RII-binding region between amino acids 503 and 516. Incubation of [32P]RII with a synthetic peptide of AKAP120-(489-522) completely inhibited the binding of [32P]RII to the recombinant AKAP120 fragments that demonstrated RII binding. In vitro RII-binding affinity studies indicated a high-affinity interaction between AKAP120 and RII with a Kapp between 50 and 120 nM for the three recombinant fragments that bound [32P]RII. RNase-protection analysis revealed that AKAP120 is a widely distributed protein, with the highest levels of mRNA observed in gastric fundus. The presence of this novel high-affinity AKAP in gastric parietal cells suggests that it may regulate RII subcellular sequestration in this cell type.
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Affiliation(s)
- D T Dransfield
- Institute of Molecular Medicine and Genetics, Medical College of Georgia, Augusta, GA 30912-3175, USA
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Abstract
cAMP-dependent protein kinase (A-kinase) anchoring proteins (AKAPs) are responsible for the subcellular sequestration of the type II A-kinase. Previously, we identified a 78 kDa AKAP which was enriched in gastric parietal cells. We have now purified the 78 kDa AKAP to homogeneity from gastric fundic mucosal supernates using type II A-kinase regulatory subunit (RII) affinity chromatography. The purified 78 kDa AKAP was recognized by monoclonal antibodies against ezrin, the canalicular actin-associated protein. Recombinant ezrin produced in either Sf9 cells or bacteria also bound RII. Recombinant radixin and moesin, ezrin-related proteins, also bound RII in blot overlay. Analysis of recombinant truncations of ezrin mapped the RII binding site to a region between amino acids 373 and 439. This region contained a 14-amino-acid amphipathic alpha-helical putative RII binding region. A synthetic peptide containing the amphipathic helical region (ezrin409-438) blocked RII binding to ezrin, but a peptide with a leucine to proline substitution at amino acid 421 failed to inhibit RII binding. In mouse fundic mucosa, RII immunoreactivity redistributed from a predominantly cytosolic location in resting parietal cells, to a canalicular pattern in mucosa from animals stimulated with gastrin. These results demonstrate that ezrin is a major AKAP in gastric parietal cells and may function to tether type II A-kinase to a region near the secretory canaliculus.
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Affiliation(s)
- D T Dransfield
- Institute of Molecular Medicine and Genetics, Medical College of Georgia and the Augusta Veterans Affairs Medical Center, 30912, USA
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Affiliation(s)
- J Navarre
- Medical College of Georgia, Augusta, USA
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12
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Abstract
Recent investigations have suggested that subcellular compartmentalization of second messenger responsive enzyme systems may be responsible for specific patterns of cellular activation. The type II cAMP-dependent kinase (A-kinase) is localized to particular subcellular domains through the binding of the regulatory subunit (RII) dimer to A-kinase anchoring proteins (AKAPs). Using a [32P]RII overlay assay, we have investigated the presence of AKAPs throughout the gastrointestinal tract, with specific emphasis focused on the gastric parietal cell. All gastrointestinal tissues contained at least one detectable AKAP (60 kDa), with five AKAPs (50-140 kDa) in fundic and antral mucosa. Isolated gastric glands contained four AKAPs. Two AKAPs (50 and 78 kDa) were detected in purified parietal cells, with the 78 kDa AKAP (AKAP78) specific to parietal cell enriched populations. RII-binding to all of these AKAPs was abolished by preincubation of [32P]RII with a synthetic peptide representing the RII-binding region of the AKAP, HT-31. AKAP78 was distributed throughout all membrane fractions of subfractionated parietal cells, with the largest amount of RII-binding detected in the light membrane fraction. Identification of A-kinase regulatory subunits by photoaffinity labeling with 8-azido-[32P]cAMP demonstrated that RII segregated into the same parietal cell subfractions as AKAP78. A majority (approximately 60%) of AKAP78 was detected in the Triton X-100-insoluble fraction, suggesting that this protein resides in a cytoskeletal domain. AKAP78 may be involved in localizing the type II A-kinase to specific intracellular locations in the parietal cell.
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Affiliation(s)
- D T Dransfield
- Department of Medicine, Surgery and Cellular Biology and Anatomy, Medical College of Georgia, Augusta, USA
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