Spin- crossover 3D architecture of Fe(II) bearing triazole ligand
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Date
2018-01-26
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Publisher
Chemical Society of Nigeria
Abstract
A new assembled iron (II) complex with triazole derivative, [Fe(pbtrz)6](ClO4)2 : (pbtrz = 4, 4’ - (1, 4 - phenylene)bis - 1, 2, 4 - triazole) was synthesized and well characterized. The ligand showed 3D architectures bridging with iron (II) metal through the N-1 and N-2. The investigation of its magnetic properties has revealed a spin-crossover (SCO) between the low-spin (LS) and the high-spin (HS) states (T1/2 = 242 K) without a thermal hysteresis loop. The spin-crossover regime was also followed by Mössbauer spectroscopy. Furthermore, a photo-induced spin transition otherwise known as light-induced excited spin-state trapping (LIESST- effect) was observed when the complex was illuminated at 5 K.
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Keywords
triazole, iron (II), spin-crossover, Mössbauer spectroscopy