A facile route for the preparation of nanoparticles of the spin-crossover complex [Fe(Htrz)2(trz)](BF4) in xerogel transparent composite films

被引：65

作者：

Faulmann, Christophe ^{[1
,2
]}

Chahine, Joe ^{[1
,2
]}

Malfant, Isabelle ^{[1
,2
]}

de Caro, Dominique ^{[1
,2
]}

Cormary, Benoit ^{[1
,2
]}

Valade, Lydie ^{[1
,2
]}

机构：

[1] CNRS, Chim Coordinat Lab, F-31077 Toulouse, France

[2] Univ Toulouse, UPS, INPT, LCC, F-31062 Toulouse, France

来源：

DALTON TRANSACTIONS | 2011年 / 40卷 / 11期

关键词：

TRANSITION MOLECULAR MATERIALS; ROOM-TEMPERATURE; PHASE-TRANSITION; STATE; LIESST; GELS; TRZ;

D O I：

10.1039/c0dt01586e

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Films and monoliths containing the spin crossover complex [Fe(Htrz)(2)(trz)](BF4) (trz = 1,2,4-triazole) as nanoparticles have been obtained. The dispersion and consecutive inclusion of the Fe complex in a silica matrix prepared from tetramethoxysilane or tetraethoxysilane afford monoliths or films with a violet colour at room temperature, which turns white above 380 K. This change of colour is reversible. This thermochromic behaviour has been characterized by measuring the magnetic properties together with thermogravimetric studies and Raman spectroscopy, the result of which all demonstrate that both films and monoliths undergo a spin crossover. Microscopy studies confirm the occurrence of the Fe complex as nanoparticles, in both the monoliths and the films. The facile synthesis of these materials as nanoparticles in transparent films should open the possibility of the synthesis of high quality films.

引用

页码：2480 / 2485

页数：6

共 62 条

[31] Towards spin crossover applications [J].

Létard, JF ;

Guionneau, P ;

Goux-Capes, L .

SPIN CROSSOVER IN TRANSITION METAL COMPOUNDS III, 2004, 235 :221-249

[32] First evidence of che LIESST effect in a Langmuir-Blodgett film [J].

Létard, JF ;

Nguyen, O ;

Soyer, H ;

Mingotaud, C ;

Delhaès, P ;

Kahn, O .

INORGANIC CHEMISTRY, 1999, 38 (13) :3020-+

[33] Photoinduced phase transition and relaxation behavior in a spin-crossover Fe (II) complex Nafion-[Fe(Htrz)3] film [J].

Liu, XJ ;

Moritomo, Y ;

Nakamura, A ;

Hirao, T ;

Toyazaki, S ;

Kojima, N .

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 2001, 70 (09) :2521-2524

[34]

MALFANT I, 2009, Patent No. 0900126

[35] Thin film of a spin crossover complex [Fe(dpp)2](BF4)2 [J].

Matsuda, Masaki ;

Tajima, Hiroyuki .

CHEMISTRY LETTERS, 2007, 36 (06) :700-701

[36] Lipid-packaged linear iron(II) triazole complexes in solution: Controlled spin conversion via solvophobic self-assembly [J].

Matsukizono, Hiroyuki ;

Kuroiwa, Keita ;

Kimizuka, Nobuo .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2008, 130 (17) :5622-+

[37] EXAFS AND X-RAY-POWDER DIFFRACTION STUDIES OF THE SPIN TRANSITION MOLECULAR MATERIALS [FE(HTRZ)A(TRZ)](BF4) AND [FE(HTRZ)(3)](BF4)(2)CENTER-DOT-H2O (HTRZ=1,2,4-4H-TRIAZOLE, TRZ=1,2,4-TRIAZOLATO) [J].

MICHALOWICZ, A ;

MOSCOVICI, J ;

DUCOURANT, B ;

CRACCO, D ;

KAHN, O .

CHEMISTRY OF MATERIALS, 1995, 7 (10) :1833-1842

[38] A combined top-down/bottom-up approach for the nanoscale patterning of spin-crossover coordination polymers [J].

Molnar, Gabor ;

Cobo, Saioa ;

Real, Jose Antonio ;

Carcenac, Franck ;

Daran, Emmanuelle ;

Vien, Christophe ;

Bousseksou, Azzedine .

ADVANCED MATERIALS, 2007, 19 (16) :2163-+

[39] Two-step spin-crossover phenomenon under high pressure in the coordination polymer Fe(3-methylpyridine)2[Ni(CN)4] [J].

Molnar, Gabor ;

Guillon, Thomas ;

Moussa, Nawel Ould ;

Rechignat, Lionel ;

Kitazawa, Takafumi ;

Nardone, Marc ;

Bousseksou, Azzedine .

CHEMICAL PHYSICS LETTERS, 2006, 423 (1-3) :152-156

[40] Bidirectional photo-switching of the spin state of iron(II) ions in a triazol based spin crossover complex within the thermal hysteresis loop [J].

Moussa, Nawel Ould ;

Ostrovskii, Denis ;

Martinez Garcia, Victor ;

Molnar, Gabor ;

Tanaka, Koichiro ;

Gaspar, Ana B. ;

Antonio Real, Jose ;

Bousseksou, Azzedine .

CHEMICAL PHYSICS LETTERS, 2009, 477 (1-3) :156-159

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