Aminophenylnitronylnitroxides: Highly Networked Hydrogen-Bond Assembly in Organic Radical Materials

Author(s)

Aboaku, Safo ^[1] ; Paduan-Filho, Armando ^[2] ; Bindilatti, Valdir ^[2] ; Oliveira, Jr., Nei Fernandes ^[2] ; Schlueter, John A. ^[3] ; Lahti, Paul M. ^[1]

Affiliation

^[1] Univ Massachusetts, Dept Chem, Amherst, MA 01003 - USA

^[2] Univ Sao Paulo, Inst Fis, BR-05315970 Sao Paulo - Brazil

^[3] Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 - USA

• Document type: Journal article
• Source: CHEMISTRY OF MATERIALS; v. 23, n. 21, p. 4844-4856, NOV 8 2011.
• Web of Science Citations: 6

Abstract

2-(Meta-aminophenyl)-4,4,5,5-tetramethyl-4,5-dihydro-1H-imidazole-3-oxid e-1-oxyl (mAPN) and 2-(para-aminophenyl)-4,4,5,5-tetramethyl-4,5-dihydro-1H-imidazole-3-oxid e-1-oxyl (pAPN) were synthesized and subjected to magnetostructural analysis. Both form extended hydrogen bonding networks involving both amino NH bonds to radical spin-density bearing nitronylnitroxide NO groups. Their crystallographic assembly motifs and magnetic exchange properties are compared to those of tert-butoxylcarbonyl (BOC) and amide derivatives having only one NH bond. The conversion of pAPN to acid salt derivatives gives a solid that is essentially diamagnetic, although dissolution of the solid shows the radical spin units to be preserved. (AU)

• FAPESP's process: 07/50968-0 - Research into new materials involving intense magnetic fields and low temperatures
• Grantee: Nei Fernandes de Oliveira Junior
• Support Opportunities: Research Projects - Thematic Grants