BROWSE

Related Researcher

Author

Lah, Myoung Soo
Nanoporous Materials Lab
Research Interests
  • Metal-Organic Frameworks (MOFs)

ITEM VIEW & DOWNLOAD

Synthesis and characterization of mononuclear and dinuclear Mn complexes with N,N '-disubstituted octaaza macrocycle

Cited 8 times inthomson ciCited 6 times inthomson ci
Title
Synthesis and characterization of mononuclear and dinuclear Mn complexes with N,N '-disubstituted octaaza macrocycle
Author
Park, WonchoulCho, Jang-HoonLee, Hong-InPark, MiraLah, Myoung SooLim, Dongyeol
Keywords
Crystal structures; Manganese(II) complexes; Octaaza macrocycle
Issue Date
200806
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Citation
POLYHEDRON, v.27, no.9-10, pp.2043 - 2048
Abstract
A new 24-membered octaaza macrocyclic ligand (L) containing two methoxybenzyl pendant arms has been synthesized. While its complexation with MnCl2 in the presence of perchlorate anion yielded a mononuclear complex, [MnL](ClO4)2, a similar reaction in the absence of perchlorate anion led to an endocyclic dinuclear complex, [Mn2LCl4]. In [MnL](ClO4)2, the Mn(II) ion was tightly surrounded by the N8-macrocyclic ligand to form a distorted bicapped octahedral geometry. In [Mn2LCl4], the endomacrocyclic bound two manganese ions are bridged via two chloro ligands to form a bis-(μ-chloro) Mn2Cl2 diamond core. Each Mn(II) ion in the dinuclear complex is additionally ligated with a diaminomethyl pyridinyl nitrogen donor atom of the ligand and a terminal chloride, which leads to a distorted octahedral geometry of the N3Cl3 donor set. An EPR study of [MnL](ClO4)2 in DMSO or DMF showed an unprecedented Mn(II) EPR signal spreading from ∼100 G over ∼7000 G with 55Mn nuclear hyperfine structures at 600-1800 G. For [Mn2LCl4], a typical high-spin Mn(II) signal was observed near g = ∼2 with an average 55Mn nuclear hyperfine coupling constant of 91 G and small ZFS.
URI
Go to Link
DOI
http://dx.doi.org/10.1016/j.poly.2008.03.021
ISSN
0277-5387
Appears in Collections:
SNS_Journal Papers

find_unist can give you direct access to the published full text of this article. (UNISTARs only)

Show full item record

qr_code

  • mendeley

    citeulike

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

MENU