TY - JOUR

T1 - UiO-66 framework with an encapsulated spin probe: synthesis and exceptional sensitivity to mechanical pressure

AU - Poryvaev, Artem S

AU - Larionov, Kirill P

AU - Albrekht, Yana N

AU - Efremov, Alexander A

AU - Kiryutin, Alexey S

AU - Smirnova, Kristina A

AU - Evtushok, Vasiliy Y

AU - Fedin, Matvey V

N1 - This work was supported by the Russian Science Foundation (22-73-10239).

PY - 2023/5/24

Y1 - 2023/5/24

N2 - Probes sensitive to mechanical stress are in demand for the analysis of pressure distribution in materials, and the design of pressure sensors based on metal-organic frameworks (MOFs) is highly promising due to their structural tunability. We report a new pressure-sensing material, which is based on the UiO-66 framework with trace amounts of a spin probe (0.03 wt%) encapsulated in cavities. To obtain this material, we developed an approach for encapsulation of stable nitroxide radical TEMPO ((2,2,6,6-tetramethylpiperidin-1-yl)oxyl) into the micropores of UiO-66 during its solvothermal synthesis. Pressure read-out using electron paramagnetic resonance (EPR) spectroscopy allows monitoring the degradation of the defected MOF structure upon pressurization, where full collapse of pores occurs at as low a pressure as 0.13 GPa. The developed methodology can be used in and ex situ and provides sensitive tools for non-destructive mapping of pressure effects in various materials.

AB - Probes sensitive to mechanical stress are in demand for the analysis of pressure distribution in materials, and the design of pressure sensors based on metal-organic frameworks (MOFs) is highly promising due to their structural tunability. We report a new pressure-sensing material, which is based on the UiO-66 framework with trace amounts of a spin probe (0.03 wt%) encapsulated in cavities. To obtain this material, we developed an approach for encapsulation of stable nitroxide radical TEMPO ((2,2,6,6-tetramethylpiperidin-1-yl)oxyl) into the micropores of UiO-66 during its solvothermal synthesis. Pressure read-out using electron paramagnetic resonance (EPR) spectroscopy allows monitoring the degradation of the defected MOF structure upon pressurization, where full collapse of pores occurs at as low a pressure as 0.13 GPa. The developed methodology can be used in and ex situ and provides sensitive tools for non-destructive mapping of pressure effects in various materials.

UR - https://www.scopus.com/record/display.uri?eid=2-s2.0-85159339596&origin=inward&txGid=f4791de3086711ad1b1093412a111659

UR - https://www.mendeley.com/catalogue/3b348692-da1d-3c1e-83a7-b4430c7c83ab/

U2 - 10.1039/d3cp01063e

DO - 10.1039/d3cp01063e

M3 - Article

C2 - 37161549

VL - 25

SP - 13846

EP - 13853

JO - Physical Chemistry Chemical Physics

JF - Physical Chemistry Chemical Physics

SN - 1463-9076

IS - 20

ER -