Publications by authors named "Joanna Wojnarska"
Article Synopsis
- * The study presents the crystal structure of N-tosyl-L-proline (TPOH) benzene hemisolvate, revealing a unique cyclic dimer structure formed by strong hydrogen bonds between carboxylic acid molecules.
- * Characterization methods like X-ray diffraction and NMR spectroscopy confirm the dimer formation and its packing with benzene solvent molecules, with a similar disordered dimeric structure found in only a few previous studies according to the Cambridge Structural Database.
Article Synopsis
- - The study explores how the color of the organic material tyraminium violurate can be changed by manipulating its environment (solvatochromic) and different crystal forms (crystallochromic), which exhibit a significant color shift (192 nm) from yellow to dark violet.
- - Tyraminium violurate crystallizes in two forms: red crystals (form I) from water and violet crystals (form II) from methanol, with form I undergoing phase transformations upon heating that also change color.
- - Advanced techniques, including UV-Vis spectroscopy and theoretical calculations, help explain the optical properties and color origins of these materials, highlighting form II's remarkable birefringence and high refractive index.
Technological innovation enforces a revolutionized approach towards materials chemistry. In this paper a new methodology towards crystal engineering of polar materials for possible applications in linear or non-linear optics (NLO), as well as ferroelectric, pyroelectric or piezoelectric crystals is presented. The necessity to fulfil several criteria concerning symmetry, electron properties of the building blocks, and also mechanical and optical stability was achieved by fusion of a pharmaceutical molecule and an NLO-phore.
View Article and Find Full Text PDF