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Titolo:
A new 3-D polymeric spin transition compound: [tris(1,4-bis(tetrazol-1-yl)butane-N1,N1 ')iron(II)] bis(perchlorate)
Autore:
van Koningsbruggen, PJ; Garcia, Y; Kooijman, H; Spek, AL; Haasnoot, JG; Kahn, O; Linares, J; Codjovi, E; Varret, F;
Indirizzi:
Univ Mainz, Inst Anorgan Chem & Analyt Chem, D-55099 Mainz, Germany Univ Mainz Mainz Germany D-55099 m & Analyt Chem, D-55099 Mainz, Germany Univ Utrecht, Bijvoet Ctr Biomol Res Crystal & Struct Chem, NL-3584 CH Utrecht, Netherlands Univ Utrecht Utrecht Netherlands NL-3584 CH 3584 CH Utrecht, Netherlands Leiden Univ, Gorlaeus Labs, Leiden Inst Chem, NL-2300 RA Leiden, Netherlands Leiden Univ Leiden Netherlands NL-2300 RA NL-2300 RA Leiden, Netherlands Inst Chim Mat Condensee Bordeaux, F-33608 Pessac, France Inst Chim Mat Condensee Bordeaux Pessac France F-33608 08 Pessac, France Univ Versailles, Lab Magnetisme & Opt, CNRS, UMR 8634, F-78035 Versailles,France Univ Versailles Versailles France F-78035 634, F-78035 Versailles,France
Titolo Testata:
JOURNAL OF THE CHEMICAL SOCIETY-DALTON TRANSACTIONS
fascicolo: 4, , anno: 2001,
pagine: 466 - 471
SICI:
1472-7773(2001):4<466:AN3PST>2.0.ZU;2-B
Fonte:
ISI
Lingua:
ENG
Soggetto:
MOLECULAR MATERIALS; IRON(II) COMPLEXES; MAGNETIC-SUSCEPTIBILITY; TETRAZOLE LIGANDS; MEMORY DEVICES; CROSSOVER; LIGHT; STATE; TEMPERATURE; MOSSBAUER;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
46
Recensione:
Indirizzi per estratti:
Indirizzo: van Koningsbruggen, PJ Univ Mainz, Inst Anorgan Chem & Analyt Chem, Staudingerweg 9, D-55099 Mainz, Germany Univ Mainz Staudingerweg 9 Mainz GermanyD-55099 y
Citazione:
P.J. van Koningsbruggen et al., "A new 3-D polymeric spin transition compound: [tris(1,4-bis(tetrazol-1-yl)butane-N1,N1 ')iron(II)] bis(perchlorate)", J CHEM S DA, (4), 2001, pp. 466-471

Abstract

A series of novel polymeric compounds of formula [M(btzb)(3)][ClO4](2) (M-II=Fe, Ni or Cu) with btzb=1,4-bis(tetrazol-1-yl)butane have been prepared and their physical properties investigated. The btzb ligand has been prepared and its crystal structure determined, together with a tentative crystal structure of the 3-D compound [Fe(btzb)(3)][ClO4](2). The model of the latter shows two symmetry-related, interpenetrating Fe-btzb networks in which the iron(II) ions approach each other as close as 8.3 and 9.1 Angstrom. Thissupramolecular catenane undergoes a sharp thermal spin transition around 160 K with hysteresis (20 K) along with a pronounced thermochromic effect. The spin crossover behaviour has been followed by magnetic, DSC, optical spectroscopy and Fe-57 Mossbauer spectroscopy measurements. Irradiation with green light at low temperature leads to population of the metastable high-spin state for the thermally active iron(II) ions. The nature of the spin crossover behaviour has been discussed in detail.

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Documento generato il 18/01/20 alle ore 01:38:29