Synthesis and structural characterization of a flexible metal organic framework {[Ni(dpbz)][Ni(CN₄]}_n, dpbz = 1,4-bis(4-pyridyl)benzene) with an unusual Ni-N bond

Journal Article · Wed Feb 10 00:00:00 EST 2016 · Solid State Sciences

DOI:https://doi.org/10.1016/j.solidstatesciences.2015.11.010· OSTI ID:1237758

Wong-Ng, Winnie; Culp, Jeffrey T.; Chen, Yu-S.; Deschamps, Jeffrey R.; Marti, Anna ^[1]

---

1. NRL

The chartreuse monoclinic Ni-dpbz (Ni(L)[Ni(CN)₄], (L = 1,4-Bis(4-pyridyl)benzene, or dpbz) crystal assumes a pillared structure with layers defined by 2-D Ni[Ni(CN)₄]_n nets and dpbz ligands as pillars, linking between coordinated Ni sites. In addition to the hysteretic adsorption/desorption feature of Ni-dpbz, in half of the parallelepiped-shape space enclosed by the pillars and nets, an additional dpbz ligand was found to link between the open ends of two four-fold Ni sites. This arrangement results in an unusual 5-fold pseudo square-pyramid environment for Ni and a significantly long Ni–N distance of 2.369(4) Å. The presence of disordered dimethyl sulfoxide (DMSO) solvent molecules give rise to the formula of Ni(dpbz)[Ni(CN)₄]·½dpbz·0.44DMSO. Sorption isotherms showed flexible behavior during the adsorption and desorption of CO₂.

• Research Organization: Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
• Sponsoring Organization: DOE - BASIC ENERGY SCIENCESNSF
• OSTI ID: 1237758
• Journal Information: Solid State Sciences, Vol. 52; ISSN 1293-2558
• Publisher: Elsevier
• Country of Publication: United States
• Language: ENGLISH