Self-Assembly Properties of Amphiphilic Iron(III) Spin Crossover Complexes in Water and at the Air-Water Interface

被引：11

作者：

Martinho, Paulo N. ^{[1
,5
,6
]}

Kuhne, Irina A. ^{[1
]}

Gildea, Brendan ^{[1
]}

McKerr, George ^{[2
]}

O'Hagan, Barry ^{[2
]}

Keyes, Tia E. ^{[3
]}

Lemma, Tibebe ^{[3
]}

Gandolfi, Claudio ^{[4
]}

Albrecht, Martin ^{[1
,4
,7
]}

Morgan, Grace G. ^{[1
]}

机构：

[1] UCD, Sch Chem, Dublin D4, Ireland

[2] Univ Ulster, Sch Biomed Sci, Cromore Rd, Coleraine BT52 1SA, Londonderry, North Ireland

[3] Dublin City Univ, Sch Chem Sci, Dublin D9, Ireland

[4] Univ Fribourg, Dept Chem, Ch Musee 9, CH-1700 Fribourg, Switzerland

[5] Univ Lisbon, Fac Sci, BioISI Biosyst & Integrat Sci Inst, Campo Grande,C8 Bdg, P-1749016 Lisbon, Portugal

[6] Charles Univ Prague, Fac Sci, Dept Inorgan Chem, Prague 12843 2, Czech Republic

[7] Univ Bern, Dept Chem & Biochem, Freiestr 3, CH-3012 Bern, Switzerland

来源：

MAGNETOCHEMISTRY | 2018年 / 4卷 / 04期

基金：

瑞士国家科学基金会; 爱尔兰科学基金会;

关键词：

spin crossover; iron(III) amphiphile; micelle; Langmuir isotherm; Raman spectroscopy; lyophilization; THERMAL HYSTERESIS; PHASE-TRANSITIONS; STRUCTURAL PHASE; CHARGE-STATE; CHAIN; FILMS; TEMPERATURE; NANOPARTICLES; EQUILIBRIUM; MOLECULES;

D O I：

10.3390/magnetochemistry4040049

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The assembly properties of three known spin crossover iron(III) complexes 1-3, at the air-water interface, are reported. All three complexes are amphiphiles, each bearing a pair of C-n alkyl chains on the polyamino Schiff base sal(2)trien ligand (n = 6, 12, or 18). Complex 1 is water-soluble but complexes 2 and 3 form Langmuir films, and attempts were made to transfer the film of the C-18 complex 3 to a glass surface. The nature of the assembly of more concentrated solutions of 3 in water was investigated by light scattering, cryo-SEM (scanning electron microscopy), and TEM (transmission electron microscopy), all of which indicated nanoparticle formation. Lyophilization of the assembly of complex 3 in water yielded a powder with a markedly different magnetic profile from the powder recovered from the initial synthesis, notably, the spin crossover was almost completely quenched, and the thermal behavior was predominantly low spin, suggesting that nanoparticle formation traps the system in one spin state.

引用

页数：16

共 91 条

[31] Spin state switching in iron coordination compounds [J].