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Selective formation of dinuclear and heptanuclear Zn(II), Ni(II), and Co(II) metal clusters from a simple dialdehyde

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Abstract
Herein, the selective formation of dinuclear and hexagonal disk-shape heptanuclear metal cluster complexes is reported. The reaction of 4-tert-butyl-2,6-diformylphenol (L) and M(ClO4)(2), where M is Zn (II), Co (II), or Ni (II), in the presence of a strong base resulted in the formation of heptanuclear metal cluster complexes. Treatment of M(ClO4)(2)center dot 6H(2)O (M = Zn, and Ni) in the presence of NaOCH3 in MeOH at the elevated temperature afforded [Zn-2(L)(2)(CH3O)(4)].ClO4 (1) and [Ni-2(L)(2)(CH3O)(2)].ClO4 (2). Furthermore, treatment of M(ClO4)(2)center dot 6H(2)O (M = Zn, Co, and Ni) in the presence of NaOH in MeOH at the elevated temperature yielded heptanuclear metal cluster complexes [Zn-7(L)(6)(mu(3)-CH3O)(6)]center dot 2ClO(4) (3), [Co-7(L)(6)(mu(3)-CH3O)(6)]center dot 2ClO(4) (4), and [Ni-7(L)(6)(mu(3)-OH)(6)]center dot 2ClO(4) (5). These were characterized using elemental analysis, infrared spectroscopy, and X-ray crystallography. Zinc complexes 1 and 3 were also characterized using H-1 NMR spectroscopy. In the crystal structures of heptanuclear cluster complexes 3-5, six ligand molecules were aligned to hold six metal centers that were in hexagonal positions. The central metal atom was connected by the bridging of the oxygen atom of methoxy and hydroxy groups with the remaining metal atoms. The photophysical properties of complexes were studied and zinc complexes 1 and 3 showed strong fluorescence in PL spectra. Themetal cluster complexes 1, 3 and 4 were employed as catalysts in the cycloaddition reaction of CO2 to epoxide, exhibiting moderate activities.
Author(s)
FarwaUme정성후류지연PaitMoumitaSinghNeetu조성이민형이준승
Issued Date
2021
Type
Article
Keyword
Cyclic carbonateHeptanuclearMetal clusterNickelZinc
DOI
10.1016/j.poly.2021.115491
URI
https://oak.ulsan.ac.kr/handle/2021.oak/9663
https://ulsan-primo.hosted.exlibrisgroup.com/primo-explore/fulldisplay?docid=TN_cdi_crossref_primary_10_1016_j_poly_2021_115491&context=PC&vid=ULSAN&lang=ko_KR&search_scope=default_scope&adaptor=primo_central_multiple_fe&tab=default_tab&query=any,contains,Selective%20formation%20of%20dinuclear%20and%20heptanuclear%20Zn(II),%20Ni(II),%20and%20Co(II)%20metal%20clusters%20from%20a%20simple%20dialdehyde&offset=0&pcAvailability=true
Publisher
POLYHEDRON
Location
네덜란드
Language
영어
ISSN
0277-5387
Citation Volume
210
Citation Number
1
Citation Start Page
0
Citation End Page
0
Appears in Collections:
Natural Science > Chemistry
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