首页> 外文期刊>Chemistry: A European journal >Spin Crossover, Polymorphism and Porosity to Liquid Solvent in Heteroleptic Iron(III) {Quinolylsalicylaldimine/Thiosemicarbazone-Salicylaldimine} Complexes
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Spin Crossover, Polymorphism and Porosity to Liquid Solvent in Heteroleptic Iron(III) {Quinolylsalicylaldimine/Thiosemicarbazone-Salicylaldimine} Complexes

机译:杂多铁(III){Quinolylsalicylaldimine / Thiosemicarbazone-Salicylaldimine}配合物中的自旋交叉,多态性和液体溶剂的孔隙率

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摘要

Heteroleptic iron(III) complexes of formula [Fe(qsal)(thsa)]center dot solvent have been synthesized: [Fe(qsal)(thsa)]center dot 0.4 BuOH (1), [Fe(qsal)(thsa)]center dot 0.5 MeCN (2) and [Fe(qsal)(thsa)]center dot 0.5 THF, (3). The latter two show partial solvent loss at room temperature to yield [Fe(qsal)(thsa)]center dot 0.1 MeCN (2') and [Fe(qsal)(thsa)]center dot 0.1 THF (3'), respectively. This family maintains a structural integrity which is analogous over different degrees of solvation, a rare occurrence in discrete molecular species. Uniquely, removal of MeCN from compound 2 leads to retention of crystallinity yielding the isostructural, fully desolvated compound [Fe(qsal)(thsa)] (2'') and a new high spin polymorph, 4. To the best of our knowledge, this is the first compound that forms polymorphs through a desolvation process. The desolvated mixture, 2'' and 4, is porous and can reabsorb MeCN and give rise to 2' again. This illustrates the reversible single-crystal-to-single-crystal transformation of two polymorphs back to a purely original phase, 2''+4 <-> 2'. The structural, magnetic and Mossbauer features of the various samples are described in terms of spin crossover.
机译:合成了式[Fe(qsal)(thsa)]中心点溶剂的杂多铁(III)配合物:[Fe(qsal)(thsa)]中心点0.4 BuOH(1),[Fe(qsal)(thsa)]中心点0.5 MeCN(2)和[Fe(qsal)(thsa)]中心点0.5 THF,(3)。后两个在室温下显示部分溶剂损失,分别产生[Fe(qsal)(thsa)]中心点0.1 MeCN(2')和[Fe(qsal)(thsa)]中心点0.1 THF(3')。该家族维持类似于不同溶剂化程度的结构完整性,这在离散分子物种中很少发生。唯一地,从化合物2中除去MeCN会导致结晶度得以保留,从而产生同构,完全去溶剂化的化合物[Fe(qsal)(thsa)](2'')和新的高自旋多晶型物4。据我们所知,这是第一种通过去溶剂化过程形成多晶型物的化合物。去溶剂化的混合物2''和4是多孔的,可以重新吸收MeCN并再次产生2'。这说明了两个多晶型物可逆的单晶至单晶转变回到纯原始相2''+ 4 <-> 2'。各种样品的结构,磁性和Mossbauer特征均通过自旋交越来描述。

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