Borophosphates are an ideal material class for the design of deep-UV optical functional crystals, yet their practical applications are limited by their small birefringence. Herein, a new mixed-coordinated borophosphate, NH(BPO(OH))·HO, has been successfully designed and synthesized, which exhibits the largest birefringence of all reported borophosphates.
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http://dx.doi.org/10.1039/d2cc00084a | DOI Listing |
J Phys Chem B
December 2024
Interdisciplinary Center for Transfer-oriented Research in Natural Sciences (IWE TFN), Martin Luther University Halle-Wittenberg, 06099 Halle/Saale, Germany.
The kinetics of homogeneous crystal nucleation and the stability of nuclei were analyzed for a random butylene succinate/butylene adipate copolymer (PBSA), employing Tammann's two-stage crystal nuclei development method, with a systematic variation of the condition of nuclei transfer from the nucleation to the growth stage. Nuclei formation is fastest at around 0 °C, which is about 50 K higher than the glass transition temperature and begins after only a few seconds. Due to the high nuclei number, spherulitic growth of lamellae is suppressed.
View Article and Find Full Text PDFAngew Chem Int Ed Engl
November 2024
Beijing Key Laboratory of Energy Conversion and Storage Materials, College of Chemistry, Beijing Normal University, Beijing, 100875, People's Republic of China.
Birefringent crystals, which possess optical anisotropy, are important optical components. However, designing and synthesizing birefringent crystals faces the challenge of achieving anisotropic structures, especially coplanar geometries. Herein, we achieve a significant birefringence in an ionic compound (CHON)(NO), (4-hydroxypyridinium nitrate, 4HPN) by hydrogen bonding between planar donors and planar acceptors.
View Article and Find Full Text PDFInt J Mol Sci
October 2024
Division of Life Science, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, China.
Dinoflagellate birefringent chromosomes (BfCs) contain some of the largest known genomes, yet they lack typical nucleosomal micrococcal-nuclease protection patterns despite containing variant core histones. One BfC end interacts with extranuclear mitotic microtubules at the nuclear envelope (NE), which remains intact throughout the cell cycle. Ultrastructural studies, polarized light and fluorescence microscopy, and micrococcal nuclease-resistant profiles (MNRPs) revealed that NE-associated chromosome ends persisted post-mitosis.
View Article and Find Full Text PDFInorg Chem
October 2024
Institute of Crystal Growth, School of Materials Science and Engineering, Shanghai Institute of Technology, Shanghai 201418, China.
Birefringent materials as the key materials in laser science and technology have attracted continuous attention due to their ability to modulate polarized light. Herein, a new lead vanadate tellurate, PbTeVO, has been synthesized through the rational integration of different kinds of birefringence-active functional units. PbTeVO features a unique two-dimensional (2D) [TeVO] layered structure consisting of [VO] and [TeO] octahedra, and Pb cations reside between the [TeVO] layers.
View Article and Find Full Text PDFPLoS One
September 2024
Skeletal Biology and Forensic Anthropology Research Group, School of Archaeology and Anthropology, Australian National University, Canberra, Australian Capital Territory, Australia.
The use of diagenetic alterations in bone microstructure ('histotaphonomy') as indicators of funerary treatment in the past and for post-mortem interval calculations in forensic cases has received increasing attention in the last decade. Studies have used histological changes to conclude in-situ decomposition, mummification, infanticide and post-mortem interval. There has been very little attempt to experimentally validate the links between decomposition, depositional conditions, time-since-death and microscopic changes in human bone so that meaningful interpretations of archaeological and forensic observations can be made.
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