Host (nanocavity of zeolite Y)/guest (Co(II), Ni(II) and Cu(II) complexes of unsaturated 16-membered octaaza; 3,4,11,12-tetramethyl-1,2,5,6,9,10,13,14-octaazacyclohexadecane; Me4[16]aneN8 nanocomposite materials (HGNM): template synthesis, characterization and catalytic oxidation of benzyl alcohol |
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Authors: | Masoud Salavati-Niasari Mohammad Reza Ganjali and Parviz Norouzi |
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Institution: | (1) Institute of Nano Science and Nano Technology, University of Kashan, Kashan, P. O. Box. 87317-51167, Iran;(2) Center of Excellence in Electrochemistry, Department of Chemistry, Tehran University, Tehran, Iran |
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Abstract: | Nanocavity zeolite-Y (host) encapsulated Co(II), Ni(II) and Cu(II) complexes of unsaturated 16-membered octaaza; 3,4,11,12-tetramethyl-1,2,5,6,9,10,13,14-octaazacyclohexadecane
‘Me416]aneN8’; macrocycle (guest) were synthesized and characterized by chemical analyses, s.e.m., x.r.d., u.v.–vis., d.r.s., surface
area, pore volume, conductometric, magnetic measurements and i.r. spectroscopy with a view to confirming the encapsulation
of complexes and to arrive at the composition, structure and geometry of encapsulated complexes. The characterization data
show the absence of extraneous complexes, retention of zeolite crystaline structure and encapsulation in the nanocavities.
Host–Guest Nanocomposite Materials (HGNM) ‘M(Me416]aneN8)]2+-NaY’ are catalytically very efficient as compared to other neat complexes for the partial oxidation of benzyl alcohol which
is stable and becomes recycled without much deterioration. |
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