Download Multifunctional molecular materials by Lahcene Ouahab PDF

By Lahcene Ouahab

This e-book offers a complete assessment on multifunctional molecular fabrics that contain coexistence or interaction or synergy among a number of actual houses targeting electric conductivity, magnetism, single-molecule magnets habit, chirality, spin crossover, and luminescence. The book’s insurance levels from transition metals and lanthanide coordination complexes to actual natural fabrics. The e-book additionally discusses a few possibilities of functions of those fabrics in molecule-based devices.

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Moreover, the paramagnetic behavior of the spins of the radical sites in (ESBN)ʹClO4 may also exclude the possibility of strong dimerization of donor radicals in these salts. Hence, it may be concluded that the Coulomb repulsion in this salt is not derived from U but from the nearest neighbor Coulomb repulsion (V). 33 34 Magnetism and Conductivity There have been studies related to the melting of the charge‘”†‡”‡† •–ƒ–‡ „› ƒ ‡Ž‡…–”‹… ϐ‹‡Ž†Ǥ ƒ–•—•Š‹–ƒ ƒ† —‰ƒ™ƒ”ƒͳͶͲ reported on the current-induced transformation from a highresistance state to a low-resistance state of the ion-radical salt ‘ˆ ƒ  Ǧ„ƒ•‡† †‹‡”‹… †‘‘” ȋȌ ‹ ™Š‹…Š –™‘   —‹–• are linked through trimethylene chains (Fig.

Thus, SOMO and HOMO of ETBN are of a space-sharing nature, which ‰—ƒ”ƒ–‡‡• •—ˆϐ‹…‹‡– ‡š…Šƒ‰‡ interactions between the S spins in SOMO and HOMO. Moreover, the on-site Coulomb repulsion, U, of SOMO is reasonably large because SOMO is spatially constrained. The exchange interaction, Jǡ ‹• ‡•–‹ƒ–‡† ƒ• ʹJ α ̱ʹͲͲ  „› —•‹‰ ͵Ȁ͸Ǧ͵ͳ ȗǤ —‡ –‘ –Š‡ presence of this exchange interaction, the S-electrons in HOMO feel a spin-dependent exchange interaction with the S-localized spin in SOMO.

The exchange interaction, Jǡ ‹• ‡•–‹ƒ–‡† ƒ• ʹJ α ̱ʹͲͲ  „› —•‹‰ ͵Ȁ͸Ǧ͵ͳ ȗǤ —‡ –‘ –Š‡ presence of this exchange interaction, the S-electrons in HOMO feel a spin-dependent exchange interaction with the S-localized spin in SOMO. As a result, when the SOMO electron has an up-spin (D), HOMO (E) is pushed up as shown in Fig. 13b, according to the spinunrestricted description, wherein the wave functions of D and E spins are separately expressed. Hence, the ground state of a cation– diradical species becomes a triplet as shown in Fig.

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