Pyridyl-Thioethers as Capping Ligands for the Design of Heteroleptic Fe(II) Complexes with Spin-Crossover Behavior

被引：2

作者：

Ungor, Oekten ^{[1
]}

Igimbayeva, Dilyara ^{[1
,2
]}

Dragulescu-Andrasi, Alina ^{[3
]}

Yergeshbayeva, Sandugash ^{[1
]}

Delgado, Teresa ^{[4
]}

Greer, Samuel M. ^{[1
,5
]}

Donalson, Gabrielle ^{[1
,6
]}

Jo, Minyoung ^{[1
]}

Erkasov, Rakhmetulla ^{[2
]}

Shatruk, Michael ^{[1
,5
]}

机构：

[1] Florida State Univ, Dept Chem & Biochem, 95 Chieftan Way, Tallahassee, FL 32306 USA

[2] LN Gumilyov Eurasian Natl Univ, Dept Chem, 5 Munaitpasov Str, Astana 010008, Kazakhstan

[3] Univ Idaho, Dept Chem, Moscow, ID 83844 USA

[4] Univ Geneva, Dept Chim Phys, Quai Ernest Ansermet 30, CH-1211 Geneva, Switzerland

[5] Natl High Magnet Field Lab, 1800 E Paul Dirac Dr, Tallahassee, FL 32310 USA

[6] Colorado Mesa Univ, Dept Phys & Environm Sci, 1100 North Ave, Grand Junction, CO 81501 USA

来源：

MAGNETOCHEMISTRY | 2021年 / 7卷 / 10期

基金：

美国国家科学基金会;

关键词：

spin crossover; thioether ligands; heteroleptic complexes; Mossbauer spectroscopy; IRON(II) COMPLEXES; COORDINATION; TRANSITION; COMPOUND;

D O I：

10.3390/magnetochemistry7100134

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Mononuclear heteroleptic complexes [Fe(tpma)(bimz)](ClO4)(2) (1a), [Fe(tpma)(bimz)](BF4)(2) (1b), [Fe(bpte)(bimz)](ClO4)(2) (2a), and [Fe(bpte)(bimz)](BF4)(2) (2b) (tpma = tris(2-pyridylmethyl)amine, bpte = S,S '-bis(2-pyridylmethyl)-1,2-thioethane, bimz = 2,2 '-biimidazoline) were prepared by reacting the corresponding Fe(II) salts with stoichiometric amounts of the ligands. All complexes exhibit temperature-induced spin crossover (SCO), but the SCO temperature is substantially lower for complexes 1a and 1b as compared to 2a and 2b, indicating the stronger ligand field afforded by the N2S2-coordinating bpte ligand relative to the N-4-coordinating tpma. Our findings suggest that ligands with mixed N/S coordination can be employed to discover new SCO complexes and to tune the transition temperature of known SCO compounds by substituting for purely N-coordinating ligands.

引用

页数：14

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