A New Class of Narrow-Band Organic Polymers with a Ferromagnetic Ground State

Tyutyulkov, N.; Karabunarliev, Stoyan; Ivanov, C.I.

doi:10.1080/00268948908037475

Cited by 13 publications

(6 citation statements)

References 33 publications

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“…A considerable amount of theoretical and experimental studies have led to a sound understanding of the nature of spin interactions in π-electron conjugated organic diradicals and polyradicals. Early work of Coulson, Rushbrooke, and Longuet-Higgins on the prediction of spin states based on a count of nonbonding molecular orbitals has been generalized by Tyutyulkov and co-workers . Ovchinnikov's rule for the ground state spin of alternant systems and Mataga's predictions for polycarbenes have been verified by extensive computational and experimental tests .…”

Section: Introductionmentioning

confidence: 99%

Spin Coupling in Nonconjugated Organic Radicals

Prasad

Radhakrishnan

1997

J. Phys. Chem. A

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Section: Introductionmentioning

confidence: 99%

Spin Coupling in Nonconjugated Organic Radicals

Prasad

Radhakrishnan

1997

J. Phys. Chem. A

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“…p systems in which a carbon atom has bee replaced by a heteroatom or heteroatomic group in a NCP can be considered to be perturbed. In the terminology introduced by Longuet-Higgins, [25] a NBMO (in an alternant or QA system [26] ) will be perturbed by substitution of a carbon atom only in those positions (active positions) for whose AO the coefficients (C) in the NBMO are nonzero. The active positions in the monomers of NCP 1 and QANCP 9 are shown in Figure 3.…”

Section: Discussionmentioning

confidence: 99%

Nonclassical Conducting Polymers: New Approaches to Organic Metals?

Baumgarten

Tyutyulkov

1998

Chem. Eur. J.

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“…82 Therefore, important explorations apparently remain even for apparently simple model compounds as part of the organic exchange rule book. 17 18…”

Section: R 1 = R 2 = T -Bumentioning

confidence: 98%

Design of Organic-Based Materials with Controlled Magnetic Properties

Lahti

1996

ACS Symposium Series

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Organic chemistry has a strong role to play in delineating theoretical, computational, and experimental strategies for designing new three-dimensional materials with interesting and potentially useful magnetic properties.The past decade has witnessed a tremendous growth in research aimed at applying chemical principles to the design of electronic materials. One of the most ambitious of these research areas is the design of molecular magnetic materials. Modern civilization has come to depend upon magnetic technologies. Credit cards identify us, cassette tapes amuse us, and on-line computer access services inform us. All of these capabilities --and many, many more ~ would not exist in their present form without magnetic technology. All of this technology is based upon materials of the ferromagnetic triad of inorganic elements in the periodic table, which have been known since the days that early explorers used "lodestone" to detect Earth's magnetic north pole. The use of these materials has matured in the past century to become a modern industry generating billions of US dollars in sales.For many years, scientific research on magnetism consisted of measuring the magnetic properties of various elements and alloys as functions of temperature and composition. That work led to the present technologies, which are quite impressive. In 1987, it was possible to purchase a 250 Megabyte hard drive computer disk occupying about 6 cubic feet for about US$22,000. In 1995, it is possible to purchase a 9000 Megabyte disk occupying about 40-50 cubic inches for US$2,500. Although it would seem that such improvements continue apace every year, some believe that the end is in sight for further optimization of current technology. 1 Hence, scientific research on magnetism is evolving to the next level, from the elucidation and optimization of properties in existing materials, to the use of molecular principles to design new materials with novel properties. This is the ambitious goal of researchers in the area of molecular magnetic materials.The design of new magnetic materials is necessarily multidisciplinary. It is necessary to combine strategies from many "traditional" areas such as inorganicorganic-polymer chemistry, physics, and engineering. Space considerations preclude detailed description of the full scope of background ideas and design strategies being employed in this research area. This chapter will specifically focus on general theoretical concepts and synthetic design strategies that are being employed in efforts to design organic molecules with controlled magnetic properties. 0097-6156/%/0644-0218$15.00A)

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A New Class of Narrow-Band Organic Polymers with a Ferromagnetic Ground State

Cited by 13 publications

References 33 publications

Spin Coupling in Nonconjugated Organic Radicals

Spin Coupling in Nonconjugated Organic Radicals

Nonclassical Conducting Polymers: New Approaches to Organic Metals?

Design of Organic-Based Materials with Controlled Magnetic Properties

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