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(NH)CdClF and (NH)CdBrF: The First Fluoride-Containing d Metal Mixed Halides Exhibiting Superior Ultraviolet Nonlinear Optical Properties.
Adv Sci (Weinh)
January 2025
Department of Chemistry, Sogang University, 35 Baekbeom-ro, Mapo-gu, Seoul, 04107, Republic of Korea.
In the search for new ultraviolet (UV) nonlinear optical (NLO) materials, two novel cadmium mixed halide compounds, (NH)CdClF and (NH)CdBrF, are successfully synthesized via hydrothermal methods. These compounds crystallize in the noncentrosymmetric (NCS) space group, R32, and are composed of distorted octahedral [CdXF] (X═Cl or Br) units, which extend into a 3D framework. Remarkably, both compounds demonstrate strong second-harmonic generation (SHG) efficiencies-3.
View Article and Find Full Text PDFSymmetry Breaking: Case Studies with Organic Cage-Racemates.
Acc Chem Res
January 2025
School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China.
ConspectusSymmetry is a pervasive phenomenon spanning diverse fields, from art and architecture to mathematics and science. In the scientific realms, symmetry reveals fundamental laws, while symmetry breaking─the collapse of certain symmetry─is the underlying cause of phenomena. Research on symmetry and symmetry breaking consistently provides valuable insights across disciplines, from parity violation in physics to the origin of homochirality in biology.
View Article and Find Full Text PDFInterplay between Two Structure Types in the Incommensurately Modulated ATaSe Compounds (A = Rb, Cs).
Inorg Chem
January 2025
Department of Chemistry, Northwestern University, Evanston, Illinois 60208, United States.
Incommensurately modulated crystals are a rare class of materials that are notoriously difficult to characterize properly. We have synthesized two new incommensurately modulated compounds, RbTaSe and CsTaSe, based on the MQ (M = Nb, Ta; Q = S, Se) unit using high-temperature solid-state synthesis. Using superspace crystallography in combination with second harmonic generation measurements, we confirmed both materials to be noncentrosymmetric, falling into the superspace group 1(αβγ)0, while the basic cell suggests 2/.
View Article and Find Full Text PDFDesigning rare earth borates as UV nonlinear optical crystals exhibiting strong second-harmonic generation responses.
Chem Commun (Camb)
January 2025
Tianjin Key Laboratory of Functional Crystal Materials, Institute of Functional Crystal, Tianjin University of Technology, Tianjin 300384, China.
Two new rare earth borate NLO crystals, KNaSrYBO and RbBaLuBO, were successfully designed and synthesized, which feature NLO-active [BO] groups and [Y/LuO] polyhedra. They exhibit notably short UV absorption cutoff edges below 200 nm, wide band gaps exceeding 6.2 eV, and strong second-harmonic generation intensities that are comparable to KDP.
View Article and Find Full Text PDFLocal characterization of collagen architecture and mechanical properties of tissue engineered atherosclerotic plaque cap analogs.
Acta Biomater
January 2025
Department of Cardiology, Biomedical Engineering, Cardiovascular Institute, Thorax Center, Erasmus MC, Rotterdam, The Netherlands.
Many cardiovascular events are triggered by fibrous cap rupture of an atherosclerotic plaque in arteries. However, cap rupture, including the impact of the cap's structural components, is poorly understood. To obtain better mechanistic insights in a biologically and mechanically controlled environment, we previously developed a tissue-engineered fibrous cap model.
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