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Spatially resolved investigation and control of the bistability in single crystals of the [Fe(bbpya)(NCS)2] spin crossover complex
- Source :
- Journal of Physical Chemistry C, Journal of Physical Chemistry C, American Chemical Society, 2016, 120 (48), pp.27608-27617. ⟨10.1021/acs.jpcc.6b10258⟩
- Publication Year :
- 2016
-
Abstract
- International audience; The spin transition in single crystals of the [FeII(bbpya) (NCS)2] (bbpya = N,N-bis(2–2′-bipyrid-6-yl)amine) mononuclear complex was investigated by a combination of X-ray diffraction, Raman spectroscopy, as well as optical and atomic force microscopy (AFM) methods. These studies, performed around 440 K, revealed an extremely abrupt spin transition associated with a structural phase transition from a triclinic (low spin) to a monoclinic (mixed low spin/high spin) structure. Spatially resolved observations of this transition evidenced a clear phase separation associated with heterogeneous nucleation and the formation of a moving macroscopic interface whose velocity reached in some cases 300 μm s–1. Using photothermal control it was possible to stabilize biphasic states of the crystal and then acquire AFM images of the phase boundary. A “sawtooth” like topography was repeatedly observed, which most likely emerges so as to minimize the elastic strain. Remarkably, a fine spatial control of the phase boundary could be also achieved using the AFM probe itself, through probe–sample convective heat exchange.
- Subjects :
- Phase boundary
010405 organic chemistry
Chemistry
Spin transition
Nucleation
Triclinic crystal system
01 natural sciences
Molecular physics
0104 chemical sciences
Surfaces, Coatings and Films
Electronic, Optical and Magnetic Materials
Crystal
Crystallography
symbols.namesake
General Energy
Spin crossover
0103 physical sciences
symbols
QD
[CHIM.COOR]Chemical Sciences/Coordination chemistry
Physical and Theoretical Chemistry
010306 general physics
Raman spectroscopy
Monoclinic crystal system
Subjects
Details
- Language :
- English
- ISSN :
- 19327447 and 19327455
- Database :
- OpenAIRE
- Journal :
- Journal of Physical Chemistry C, Journal of Physical Chemistry C, American Chemical Society, 2016, 120 (48), pp.27608-27617. ⟨10.1021/acs.jpcc.6b10258⟩
- Accession number :
- edsair.doi.dedup.....977fbadd41cba6c2b6916a0db7851cc5