Organic Radical-Linked Covalent Triazine Framework with Paramagnetic Behavior.
ACS Nano
; 13(5): 5251-5258, 2019 May 28.
Article
em En
| MEDLINE
| ID: mdl-31033280
ABSTRACT
The production of multifunctional pure organic materials that combine different sizes of pores and a large number of electron spins is highly desirable due to their potential applications as polarizers for dynamic nuclear polarization-nuclear magnetic resonance and as catalysts and magnetic separation media. Here, we report a polychlorotriphenylmethyl radical-linked covalent triazine framework (PTMR-CTF). Two different sizes of micropores were established by N2 sorption and the presence of unpaired electrons (carbon radicals) by electron spin resonance and superconducting quantum interference device-vibrating sample magnetometer analyses. Magnetization measurements demonstrate that this material exhibits spin-half paramagnetism with a spin concentration of â¼2.63 × 1023 spins/mol. We also determined the microscopic origin of the magnetic moments in PTMR-CTF by investigating its spin density and electronic structure using density functional theory calculations.
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MEDLINE
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En
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ACS Nano
Ano de publicação:
2019
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Article