Breeding behavior of radiation-induced effects in organic materials and their possible use as radiation dosimeters

Abdelaal, Saad; Abdelhady, A.M.; Tokhy, Hatem Hussny; Eid, Ahmed M.; Rammah, Y.S.; Awad, E.M.; Elmaghraby, Elsayed K.

doi:10.1016/j.jpcs.2020.109814

Cited by 12 publications

(1 citation statement)

References 28 publications

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“…Structural stability of organic-based materials in the presence of high radiation fields is crucial for advancements in detection and monitoring, but very little is known about the primary decomposition and secondary interactions that occur with exposure to radiation. [1][2][3][4] Organic materials are widely used in applications where they are exposed to ionizing radiation (i. e. radiation detection, nuclear shielding, space science, and radiopharmaceuticals) and significant efforts have initially focused on the impact of γ radiation to chemical and physical properties of organic polymers. [4,5] Polymers contain macromolecules that are linked to form either amorphous or semicrystalline arrange-ments and their overall radiation resistance can be related to the inclusion of aromatic groups as well as specifics to the structure.…”

Section: Introductionmentioning

confidence: 99%

Atomistic‐Level Effects of Noncovalent Interactions and Crystalline Packing for Organic Material Structural Integrity upon Exposure to Gamma Radiation

Kruse,

Rajapaksha,

MacGillivray

et al. 2023

Chemistry A European J

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Developing an atomistic understanding of ionizing radiation induced changes to organic materials is necessary for intentional design of greener and more sustainable materials for radiation shielding and detection. Cocrystals are promising for these purposes, but a detailed understanding of how the specific intermolecular interactions within the lattice upon exposure to radiation affect the structural stability of the organic crystalline material is unknown. Herein, we report the first study evaluating atomistic‐level effects of γ radiation on both single‐ and multicomponent organic crystalline materials and how specific noncovalent interactions and packing within the crystalline lattice enhance structural stability. Dose studies were performed on all crystalline systems and evaluated via experimental and computational methods. Changes in crystallinity were evaluated by p‐XRD and free radical formation was analyzed via EPR spectroscopy. Type of intermolecular interactions and packing within the crystal lattice was delineated and related to the specific free radical species formed and the structural integrity of each material. Periodic DFT and HOMO‐LUMO surface mapping calculations provided atomistic‐level identifications of the most probable sites for the radicals formed upon exposure to γ radiation and relate intermolecular interactions and molecular packing within the crystalline lattice to experimental results.

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