کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1300467 | 1498822 | 2007 | 43 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Magnetic assemblies based on Mn(III) salen analogues
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کلمات کلیدی
PhthH2AbpyterephthalatePAODPPEN-methylimidazoleTCNQTCNE1-Methylimidazole - 1-متیلیمیدازول1,2-Bis(diphenylphosphino)ethane - 1،2-Bis (دی فینیل فسفین) اتان2,2′-Bipyridine - 2،2'-بپییریدین4-tert-Butylpyridine - 4-ترت-بوتیل پرییدین4-Picoline - 4-پیکولینTetracyanoquinodimethane - tetracianquinodimethaneTetracyanoethylene - tetracyanoethyleneSalen - آنها ترک می کنندImidazole - ایمیدازولHIM - به اوMagnetic properties - خواص مغناطیسیSuperparamagnetism - سوپر پارامغناطیسCyclopentadiene - سیکلوپنتادیوHydrotris(pyrazolyl)borate - هیدروتریس (پریازولیل) بوراتPyridine - پیریدین
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی معدنی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Assembled Mn(III) salen-type quadridentate Schiff-base (SB) complexes, [MnIII(SB)]n+, with various metal-containing/non-metal building blocks and their synthetic strategies are summarized. With the Mn(III) salen-type complexes, it is possible to have two coordination labile sites in trans- or cis-position as the SB ligand takes a quasi-planar chelate form and a stereoscopic chelate form, respectively, being a coordination-acceptor building block. Particularly in the quasi-planar form, the coordination labile sites face the direction of the Jahn-Teller elongated axis occupying the dz2 orbital with an unpaired electron. Due to this characteristic orbital arrangement, the activity and magnetic-electronic properties of the Mn(III) salen-type complexes can be tuned, at will, by modulating the SB ligand that is equatorially located around the Mn(III) ion and coupled with the empty dx2ây2 orbital. Both the structural aspects, and magnetic characteristics of assembled compounds are of great interest. This point is the main theme in this review. The high-spin Mn(III) salen-type complexes (SÂ =Â 2) display strong magnetic uniaxial anisotropy, in which the magnetic easy axis can be unambiguously found as the Jahn-Teller axis. Thus, out-of-plane assembly of the quasi-planar Mn(III) salen-type complexes makes it possible to align the easy axes of the Mn(III) ions. This strategy creates unique magnetic systems involving molecular superparamagnets such as single-molecule magnets and single-chain magnets. So far, variously assembled systems employing Mn(III) salen-type complexes as oligomers, one-dimensional chains, and two- or three-dimensional networks have been designed. By following this review, we would know that the Mn(III) salen-type complexes have the potential as a versatile magnetic source for the design of unique magnetic materials with multiple assembling structures.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Coordination Chemistry Reviews - Volume 251, Issues 21â24, November 2007, Pages 2622-2664
Journal: Coordination Chemistry Reviews - Volume 251, Issues 21â24, November 2007, Pages 2622-2664
نویسندگان
Hitoshi Miyasaka, Ayumi Saitoh, Satoshi Abe,