Spin-Crossover Properties of an Iron(II) Coordination Nanohoop

被引：20

作者：

Ojea, Maria Jose Heras ^{[1
]}

Van Raden, Jeff M. ^{[2
,3
]}

Louie, Shayan ^{[2
,3
]}

Collins, Richard ^{[1
]}

Pividori, Daniel ^{[4
]}

Cirera, Jordi ^{[5
,6
]}

Meyer, Karsten ^{[4
]}

Jasti, Ramesh ^{[2
,3
]}

Layfield, Richard A. ^{[1
]}

机构：

[1] Univ Sussex, Dept Chem, Brighton BN1 9QJ, E Sussex, England

[2] Univ Oregon, Dept Chem & Biochem, Eugene, OR 97403 USA

[3] Univ Oregon, Mat Sci Inst, Eugene, OR 97403 USA

[4] Friedrich Alexander Univ Erlangen Nurnberg FAU, Dept Chem & Pharm, Inorgan Chem, Egerlandstr 1, D-91058 Erlangen, Germany

[5] Univ Barcelona, Dept Quim Inorgan & Organ, Diagonal 645, Barcelona 08028, Spain

[6] Univ Barcelona, Inst Recerca Quim Teor & Computac, Diagonal 645, Barcelona 08028, Spain

来源：

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION | 2021年 / 60卷 / 07期

基金：

英国工程与自然科学研究理事会; 美国国家科学基金会;

关键词：

iron; magnetic properties; molecular materials; nanohoop ligand; spin crossover; MAGNETIC-PROPERTIES; TRANSITION; COMPLEXES; TEMPERATURE; SERIES;

D O I：

10.1002/anie.202013374

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Addition of the bipyridyl-embedded cycloparaphenylene nanohoop bipy[9]CPP to [Fe{H2B(pyz)(2)}] (pyz=pyrazolyl) produces the distorted octahedral complex [Fe(bipy[9]CPP){H2B(pyz)(2)}(2)] (1). The molecular structure of 1 shows that the nanohoop ligand contains a non-planar bipy unit. Magnetic susceptibility measurements indicate spin-crossover (SCO) behaviour with a T-1/2 of 130 K, lower than that of 160 K observed with the related compound [Fe(bipy){H2B(pyz)(2)}(2)] (2), which contains a conventional bipy ligand. A computational study of 1 and 2 reveals that the curvature of the nanohoop leads to the different SCO properties, suggesting that the SCO behaviour of iron(II) can be tuned by varying the size and diameter of the nanohoop.

引用

页码：3515 / 3518

页数：4

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