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A Self‐Assembled Heterometallic {Co 7 –Ho 1 } Nanocluster: 3d‐4f Trimeric Keggin‐Type Silicotungstate [HoCo 7 Si 3 W 29 O 108 (OH) 5 (H 2 O) 4 ] 18 – and its Catalytic and Magnetic Applications
Author(s) -
Das Vivek,
Khan Imran,
Hussain Firasat,
Sadakane Masahiro,
Hageo Kazuki,
Ichihashi Katsuya,
Inoue Katsuya,
Nishihara Sadafumi
Publication year - 2019
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201801103
Subject(s) - polyoxometalate , chemistry , thermogravimetric analysis , crystallography , antiferromagnetism , cyclohexanol , paramagnetism , benzyl alcohol , electrospray ionization , spectroscopy , infrared spectroscopy , catalysis , crystal structure , mass spectrometry , inorganic chemistry , organic chemistry , physics , chromatography , quantum mechanics , condensed matter physics
A new self assembled Co 2+ and Ho 3+ ‐substituted polyoxometalate have been synthesized using a trilacunary Keggin‐type silicotungstate. The polyanion complex of the formula [HoCo 7 Si 3 W 29 O 108 (OH) 5 (H 2 O) 4 ] 18– (1) has a trimeric crystal structure which displayed an excellent catalytic and magnetic property. Here, we have carried out selective oxidation of various alcohol substrates such as derivatives of benzyl alcohol, cyclohexanol etc. to its corresponding aldehydes/ketones. The paramagnetic nature of the compound was seen from the magnetic study. However, antiferromagnetic interaction was observed between Co 2+ ‐Co 2+ or Co 2+ ‐Ho 3+ at a very low temperature. The compound was characterized by FT‐IR, UV/Visible spectroscopy, Single crystal X‐ray diffraction, X‐ray powder diffraction, high‐resolution electrospray ionization mass spectroscopy (HR‐ESI‐MS) and thermogravimetric analysis (TGA).