TY  - JOUR
AU  - Zhao, Tian
AU  - Cuignet, Laure
AU  - Dirtu, Marinela Maria
AU  - Wolff, Mariusz
AU  - Spasojević, Vojislav
AU  - Boldog, Ishtvan
AU  - Rotaru, Aurelian
AU  - Garcia, Yann
AU  - Janiak, Christoph
PY  - 2015
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/672
AB  - The spin-crossover (SCO) compounds [Fe(Htrz)(3)](BF4)(2)center dot H2O (SCO-1) and [Fe(Htrz)(2)trz]BF4 (SCO-2) (Htrz = 1,2,4-triazole) were embedded in the pores of mesostructured silica MCM-41 to yield SCO"MCM composites as evidenced by electron microscopy, gas sorption studies, powder X-ray diffractometry, atomic absorption and infrared spectrometry. Studies of the temperature-induced spin crossover behavior of the composites by temperature-variable Fe-57 Mossbauer spectroscopy, magnetic and differential scanning calorimetry measurements and optical reflectivity indicate that the spin transition of the composites was significantly shifted for SCO-1"MCM to higher temperature in comparison to bulk SCO-1 compounds while the shift for SCO-2 was negligible. These shifts in the transition temperature for SCO-1"MCM [versus bulk SCO-1] amounted to T-c(up arrow) = 371/376 K [282/291 K] and T-c(down arrow) = 340/345 K [276/286 K] (magnetic/optical reflectivity data) with a broadening of the hysteresis by 25-26 K relative to bulk SCO-1 (varying slightly with the used method). The significant difference in the SCO behavior of the similar materials SCO-1 and SCO-2 when embedded in the MCM-41 matrix is assigned to the hydration of the SCO-1"MCM material. Water is apparently crucial in transmitting the confinement pressure or matrix effect on the spin transition when the SCO compound is embedded between the pore walls.
T2  - Journal of Materials Chemistry. C
T1  - Water effect on the spin-transition behavior of Fe(II) 1,2,4-triazole 1D chains embedded in pores of MCM-41
VL  - 3
IS  - 30
SP  - 7802
EP  - 7812
DO  - 10.1039/c5tc00311c
ER  - 

@article{
author = "Zhao, Tian and Cuignet, Laure and Dirtu, Marinela Maria and Wolff, Mariusz and Spasojević, Vojislav and Boldog, Ishtvan and Rotaru, Aurelian and Garcia, Yann and Janiak, Christoph",
year = "2015",
abstract = "The spin-crossover (SCO) compounds [Fe(Htrz)(3)](BF4)(2)center dot H2O (SCO-1) and [Fe(Htrz)(2)trz]BF4 (SCO-2) (Htrz = 1,2,4-triazole) were embedded in the pores of mesostructured silica MCM-41 to yield SCO"MCM composites as evidenced by electron microscopy, gas sorption studies, powder X-ray diffractometry, atomic absorption and infrared spectrometry. Studies of the temperature-induced spin crossover behavior of the composites by temperature-variable Fe-57 Mossbauer spectroscopy, magnetic and differential scanning calorimetry measurements and optical reflectivity indicate that the spin transition of the composites was significantly shifted for SCO-1"MCM to higher temperature in comparison to bulk SCO-1 compounds while the shift for SCO-2 was negligible. These shifts in the transition temperature for SCO-1"MCM [versus bulk SCO-1] amounted to T-c(up arrow) = 371/376 K [282/291 K] and T-c(down arrow) = 340/345 K [276/286 K] (magnetic/optical reflectivity data) with a broadening of the hysteresis by 25-26 K relative to bulk SCO-1 (varying slightly with the used method). The significant difference in the SCO behavior of the similar materials SCO-1 and SCO-2 when embedded in the MCM-41 matrix is assigned to the hydration of the SCO-1"MCM material. Water is apparently crucial in transmitting the confinement pressure or matrix effect on the spin transition when the SCO compound is embedded between the pore walls.",
journal = "Journal of Materials Chemistry. C",
title = "Water effect on the spin-transition behavior of Fe(II) 1,2,4-triazole 1D chains embedded in pores of MCM-41",
volume = "3",
number = "30",
pages = "7802-7812",
doi = "10.1039/c5tc00311c"
}

Zhao, T., Cuignet, L., Dirtu, M. M., Wolff, M., Spasojević, V., Boldog, I., Rotaru, A., Garcia, Y.,& Janiak, C.. (2015). Water effect on the spin-transition behavior of Fe(II) 1,2,4-triazole 1D chains embedded in pores of MCM-41. in Journal of Materials Chemistry. C, 3(30), 7802-7812.
https://doi.org/10.1039/c5tc00311c

Zhao T, Cuignet L, Dirtu MM, Wolff M, Spasojević V, Boldog I, Rotaru A, Garcia Y, Janiak C. Water effect on the spin-transition behavior of Fe(II) 1,2,4-triazole 1D chains embedded in pores of MCM-41. in Journal of Materials Chemistry. C. 2015;3(30):7802-7812.
doi:10.1039/c5tc00311c .

Zhao, Tian, Cuignet, Laure, Dirtu, Marinela Maria, Wolff, Mariusz, Spasojević, Vojislav, Boldog, Ishtvan, Rotaru, Aurelian, Garcia, Yann, Janiak, Christoph, "Water effect on the spin-transition behavior of Fe(II) 1,2,4-triazole 1D chains embedded in pores of MCM-41" in Journal of Materials Chemistry. C, 3, no. 30 (2015):7802-7812,
https://doi.org/10.1039/c5tc00311c . .