Both Spacer Length and Parity Influence the Thermal and Light-Induced Properties of Iron(II) α,ω-Bis(tetrazole-1-yl)alkane Coordination Polymers
作者:Alina Absmeier、Matthias Bartel、Chiara Carbonera、Guy N. L. Jameson、Peter Weinberger、Andrea Caneschi、Kurt Mereiter、Jean-François Létard、Wolfgang Linert
DOI:10.1002/chem.200500941
日期:2006.3.1
A new series of [mu-tris-1,n-bis(tetrazol-1-yl)alkane-N4,N4'}iron(II)] bis(perchlorate) spin-crossover coordination polymers ([Fe(nditz)3](ClO4)2]; n = 4-9) has been synthesised and characterised. The ditetrazole bridging ligands provide octahedral symmetry at the iron(II) centres while allowing the distance between iron(II) centres to be varied. These polymers have therefore been investigated to
一系列新的[mu-tris- 1,n-双(四唑-1-基)烷烃-N4,N4'}铁(II)]双(高氯酸盐)自旋交联配位聚合物([Fe(nditz)3 ](ClO4)2]; n = 4-9)已合成并表征。双四唑桥连配体在铁(II)中心提供八面体对称性,同时允许铁(II)中心之间的距离变化。因此,已经对这些聚合物进行了研究,以确定间隔物长度对其热和光诱导的自旋转变行为的影响。间隔物(n)中碳原子数目的增加提高了热自旋交叉温度,同时降低了通过照射光致激发自旋态俘获(LIESST)效应而产生的光致亚稳态的稳定性。样品在530 nm处。但是值得注意的是 间隔基的奇偶性也具有作用,使得取决于桥连的配体是否具有偶数或奇数个碳原子,将一系列络合物分成两个亚系列。提出了使用单构型坐标(SCC)模型在分子水平上的解释。
Microwave alkylation of lithium tetrazolate
作者:Danny Müller、Christian Knoll、Peter Weinberger
DOI:10.1007/s00706-016-1867-7
日期:2017.1
ABSTRACT: N1-substituted tetrazoles are interesting ligands in transition metal coordination chemistry, especially in the field of spin crossover. Their synthesis is performed in most cases according to the Franke-synthesis, using a primary amine as reagent introducing the substitution pattern. To enhance flexibility in means of substrate scope, we developed a new protocol based on alkylation of lithium
Mutual Influence of Spacer Length and Noncoordinating Anions on Thermal and Light‐Induced Spin‐Crossover Properties of Iron(II)–α,ω‐Bis(tetrazol‐1‐yl)alkane Coordination Polymers
作者:Alina Absmeier、Matthias Bartel、Chiara Carbonera、Guy N. L. Jameson、Franz Werner、Michael Reissner、Andrea Caneschi、Jean‐François Létard、Wolfgang Linert
DOI:10.1002/ejic.200601096
日期:2007.7
The influence of noncoordinatinganions is analysed in an extension of our systematic investigations into iron(II) spin-crossover coordinationpolymers. We present here ditetrazole complexes of iron(II) tetrafluoroborate where the two tetrazole moieties are separated by alkylene spacers. The number of carbon atoms in the spacer (n) was varied between n = 5–10, 12, and the complexes were compared with