%0 Journal Article %T Spin-Crossover and Field-Induced Single-Molecule Magnet Behaviour in Metal(II)-Dipyrazolylpyridine Complexes %+ Institut des Sciences Chimiques de Rennes (ISCR) %+ Université Larbi Tébessi [Tebessa] %+ Institut de Physique de Rennes (IPR) %A Douib, Haiet %A Cornet, Louis %A Gonzalez, Jessica Flores %A Trzop, Elzbieta %A Dorcet, Vincent %A Gouasmia, Abdelkrim %A Ouahab, Lahcène %A Cador, Olivier %A Pointillart, Fabrice %Z Centre National de la Recherche Scientifique (CNRS) %Z ERC Consolidator Grant MULTIPROSMM [725184] %Z Universite de Rennes 1 %< avec comité de lecture %@ 1434-1948 %J European Journal of Inorganic Chemistry %I Wiley-VCH Verlag %V 2018 %N 40 %P 4452-4457 %8 2018-11-01 %D 2018 %R 10.1002/ejic.201800819 %K Iron %K Cobalt %K Dipyrazolylpyridine %K Single-molecule magnet %K Spin crossover %Z Physics [physics]Journal articles %X The reaction between the 2,6-di(pyrazol-1-yl)-4-(bromomethyl) pyridine (L) ligand and divalent transition metal salts led to the formation of three mononuclear complexes of formula [M(L)(2)](BF4)(2)center dot xMeNO(2) [M = Fe-II (1 center dot xMeNO(2)), x = 0 and 4, M = Co-II, x = 2 (2 center dot 2MeNO(2)) and]. Static magnetic measurements highlighted thermal spin crossover at high temperature (320-340 K) for the two Fe-II solvatomorphs nevertheless both the solvation degree and crystal packing had drastic influence on the shape and width of the hysteresis loop. Thus the 1 displayed abrupt and straight (6 K) hysteresis loop while for 1 center dot 4MeNO(2) the thermal spin transition could be described as a six-step gradual transition with the widest magnetic bistability range (35 K) for this kind of complexes. Irradiation at 530 nm of 1 center dot 4MeNO(2) provoked an efficient LIESST effect at low temperature (T-LIESST = 55 K). Finally dynamic magnetic measurements of 2 center dot 2MeNO(2) shown a field-induced mononuclear Single-Molecule Magnet behavior with Delta = 14.6(4) cm(-1) and tau(0) = 6.28(8) x 10(-7) s. %G English %2 https://univ-rennes.hal.science/hal-01935237/document %2 https://univ-rennes.hal.science/hal-01935237/file/Douib%20et%20al_Spin%20Crossover%20and%20Field-Induced%20Single-Molecule%20Magnet%20Behaviour.pdf %L hal-01935237 %U https://univ-rennes.hal.science/hal-01935237 %~ UNIV-RENNES1 %~ CNRS %~ INSA-RENNES %~ ENSC-RENNES %~ OSUR %~ ISCR %~ SCR_OMC2012 %~ IPR %~ ISCR-OMC %~ STATS-UR1 %~ UR1-SPM %~ ISCR-PRATS %~ INC-CNRS %~ UR1-UFR-SPM %~ UR1-HAL %~ UR1-SDLM %~ IPR-ML %~ TEST-UR-CSS %~ UNIV-RENNES %~ INSA-GROUPE %~ TEST-HALCNRS %~ UR1-MMS %~ TEST2-HALCNRS