An organic radical solid solution with strong ferromagnetic exchange

Hidenori Murata; Joel T. Mague; Safo Aboaku; Naoki Yoshioka; Paul M. Lahti

doi:10.1021/cm0711459

An organic radical solid solution with strong ferromagnetic exchange

Hidenori Murata, Joel T. Mague, Safo Aboaku, Naoki Yoshioka, Paul M. Lahti

Department of Applied Chemistry

Research output: Contribution to journal › Article › peer-review

14 Citations (Scopus)

Abstract

A solid-solution crystallization of two organic radicals to give strong 1D chain ferromagnetic (FM) exchange, controlled by hydrogen-bonding assembly of the radicals was analyzed. The hydrogen-bonded chains in the benzimidazole group assembled nitronylnitroxide radical groups in BImNN into T-stacks that favor FM exchange by a through-space spin polarization (SP) model. Favorable contacts occurred when spin orbitals of opposite spin density overlap, leading in the case of BImNN to (FM) exchange. Magnetic measurements supported the SP model, showing 1D Heisenberg chain FM exchange in BImNN. X-ray diffraction analysis of several single crystals of the mixture confirmed that the fluorinated and nonfluorinated radicals intimately co-mingle. The contacts should induce FM exchange along the whole chain of T-stacks, based on qualitative spin orbital overlap. Results show that structural changes to BImNN can give significant changes in solid-state crystal packing and magnetic-exchange behavior.

Original language	English
Pages (from-to)	4111-4113
Number of pages	3
Journal	Chemistry of Materials
Volume	19
Issue number	17
DOIs	https://doi.org/10.1021/cm0711459
Publication status	Published - 2007 Aug 21

ASJC Scopus subject areas

Chemistry(all)
Chemical Engineering(all)
Materials Chemistry

Access to Document

10.1021/cm0711459

Cite this

@article{ba7769d6311a4f41886b7e4a49de2499,

title = "An organic radical solid solution with strong ferromagnetic exchange",

abstract = "A solid-solution crystallization of two organic radicals to give strong 1D chain ferromagnetic (FM) exchange, controlled by hydrogen-bonding assembly of the radicals was analyzed. The hydrogen-bonded chains in the benzimidazole group assembled nitronylnitroxide radical groups in BImNN into T-stacks that favor FM exchange by a through-space spin polarization (SP) model. Favorable contacts occurred when spin orbitals of opposite spin density overlap, leading in the case of BImNN to (FM) exchange. Magnetic measurements supported the SP model, showing 1D Heisenberg chain FM exchange in BImNN. X-ray diffraction analysis of several single crystals of the mixture confirmed that the fluorinated and nonfluorinated radicals intimately co-mingle. The contacts should induce FM exchange along the whole chain of T-stacks, based on qualitative spin orbital overlap. Results show that structural changes to BImNN can give significant changes in solid-state crystal packing and magnetic-exchange behavior.",

author = "Hidenori Murata and Mague, {Joel T.} and Safo Aboaku and Naoki Yoshioka and Lahti, {Paul M.}",

year = "2007",

month = aug,

day = "21",

doi = "10.1021/cm0711459",

language = "English",

volume = "19",

pages = "4111--4113",

journal = "Chemistry of Materials",

issn = "0897-4756",

publisher = "American Chemical Society",

number = "17",

}

TY - JOUR

T1 - An organic radical solid solution with strong ferromagnetic exchange

AU - Murata, Hidenori

AU - Mague, Joel T.

AU - Aboaku, Safo

AU - Yoshioka, Naoki

AU - Lahti, Paul M.

PY - 2007/8/21

Y1 - 2007/8/21

N2 - A solid-solution crystallization of two organic radicals to give strong 1D chain ferromagnetic (FM) exchange, controlled by hydrogen-bonding assembly of the radicals was analyzed. The hydrogen-bonded chains in the benzimidazole group assembled nitronylnitroxide radical groups in BImNN into T-stacks that favor FM exchange by a through-space spin polarization (SP) model. Favorable contacts occurred when spin orbitals of opposite spin density overlap, leading in the case of BImNN to (FM) exchange. Magnetic measurements supported the SP model, showing 1D Heisenberg chain FM exchange in BImNN. X-ray diffraction analysis of several single crystals of the mixture confirmed that the fluorinated and nonfluorinated radicals intimately co-mingle. The contacts should induce FM exchange along the whole chain of T-stacks, based on qualitative spin orbital overlap. Results show that structural changes to BImNN can give significant changes in solid-state crystal packing and magnetic-exchange behavior.

AB - A solid-solution crystallization of two organic radicals to give strong 1D chain ferromagnetic (FM) exchange, controlled by hydrogen-bonding assembly of the radicals was analyzed. The hydrogen-bonded chains in the benzimidazole group assembled nitronylnitroxide radical groups in BImNN into T-stacks that favor FM exchange by a through-space spin polarization (SP) model. Favorable contacts occurred when spin orbitals of opposite spin density overlap, leading in the case of BImNN to (FM) exchange. Magnetic measurements supported the SP model, showing 1D Heisenberg chain FM exchange in BImNN. X-ray diffraction analysis of several single crystals of the mixture confirmed that the fluorinated and nonfluorinated radicals intimately co-mingle. The contacts should induce FM exchange along the whole chain of T-stacks, based on qualitative spin orbital overlap. Results show that structural changes to BImNN can give significant changes in solid-state crystal packing and magnetic-exchange behavior.

UR - http://www.scopus.com/inward/record.url?scp=34548363296&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=34548363296&partnerID=8YFLogxK

U2 - 10.1021/cm0711459

DO - 10.1021/cm0711459

M3 - Article

AN - SCOPUS:34548363296

SN - 0897-4756

VL - 19

SP - 4111

EP - 4113

JO - Chemistry of Materials

JF - Chemistry of Materials

IS - 17

ER -

An organic radical solid solution with strong ferromagnetic exchange

Abstract

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this