BROWSE

Related Researcher

Author

Moon, Hoi Ri
Functional Inorganic Nanomaterials for Energy Lab (FINE)
Research Interests
  • Inorganic-organic hybrid materials, carbon capture materials, hydrogen storage materials, heterogeneous catalyst

ITEM VIEW & DOWNLOAD

Post-Synthetic Modifications of Framework Metal Ions in Isostructural Metal-Organic Frameworks: Core-Shell Heterostructures via Selective Transmetalations

Cited 0 times inthomson ciCited 28 times inthomson ci
Title
Post-Synthetic Modifications of Framework Metal Ions in Isostructural Metal-Organic Frameworks: Core-Shell Heterostructures via Selective Transmetalations
Author
Song, XiaokaiKim, Tae KyungKim, HyehyunKim, DongwookJeong, SeokMoon, Hoi RiLah, Myoung Soo
Keywords
Core region; Core-shell; Framework structures; Isostructural; Kinetically controlled; Metal organic framework; Net topology; Postsynthetic modification; Soaking time; Transmetalation; Transmetalation reaction
Issue Date
201208
Publisher
AMER CHEMICAL SOC
Citation
CHEMISTRY OF MATERIALS, v.24, no.15, pp.3065 - 3073
Abstract
The transmetalation (the replacement of metal ions) of a family of highly porous isostructural metal organic frameworks (MOFs), M-6(BTB)(4)(BP)(3) (where M = Zn(II) (1), Co(II) (2), Cu(II) (3), and Ni(II) (4), BTB = 1,3,5-benzenetribenzoate, and BP = 4,4'-dipyridyl) with an ith-d net topology has been investigated. These compounds have different framework stabilities depending on the framework metal ions. The transmetalation and the reverse transmetalation reactions of the framework metal ions were observed between the MOFs, 1 and 2, having a similar thermodynamic stability. While the transmetalation from thermodynamically less stable 1 and 2 to more stable 3 and 4 were achieved by soaking single crystals of 1 and 2 in a solution of N,N'-dimethylformamide (DMF) containing Cu(II) and Ni(II) ions, respectively, no reverse transmetalation was observed. By simply controlling the soaking time, not only could homogeneously transmetalated crystalline framework structures be prepared via the thermodynamically controlled complete replacement of the framework metal ions but also selectively transmetalated core shell heterostructures were formed via kinetically controlled replacement that was mainly restricted to the external shell region of the crystal. The fully transmetalated MOFs showed significantly improved framework stabilities compared with the parent MOFs. A marked improvement in the framework stability was observed, even in the selectively transmetalated Co(II)/Cu(II)- and Co(II)/Ni(II)-core shell heterostructures. Although the frameworks are partially transmetalated, the framework stability of not only the external shell region but also of the internal core region was significantly affected.
URI
Go to Link
DOI
http://dx.doi.org/10.1021/cm301605w
ISSN
0897-4756
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