Co₂ and Co₃ Mixed Cluster Secondary Building Unit Approach toward a Three-Dimensional Metal-Organic Framework with Permanent Porosity.

Autor: Chao MY; College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China. 15062328714@163.com., Zhang WH; College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China. whzhang@suda.edu.cn., Lang JP; College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China. jplang@suda.edu.cn.
Jazyk: angličtina
Zdroj: Molecules (Basel, Switzerland) [Molecules] 2018 Mar 25; Vol. 23 (4). Date of Electronic Publication: 2018 Mar 25.
DOI: 10.3390/molecules23040755
Abstrakt: Large and permanent porosity is the primary concern when designing metal-organic frameworks (MOFs) for specific applications, such as catalysis and drug delivery. In this article, we report a MOF Co 11 (BTB)₆(NO₃)₄(DEF)₂(H₂O) 14 ( 1 , H₃BTB = 1,3,5-tris(4-carboxyphenyl)benzene; DEF = N , N -diethylformamide) via a mixed cluster secondary building unit (SBU) approach. MOF 1 is sustained by a rare combination of a linear trinuclear Co₃ and two types of dinuclear Co₂ SBUs in a 1:2:2 ratio. These SBUs are bridged by BTB ligands to yield a three-dimensional (3D) non-interpenetrated MOF as a result of the less effective packing due to the geometrically contrasting SBUs. The guest-free framework of 1 has an estimated density of 0.469 g cm -3 and exhibits a potential solvent accessible void of 69.6% of the total cell volume. The activated sample of 1 exhibits an estimated Brunauer-Emmett-Teller (BET) surface area of 155 m² g -1 and is capable of CO₂ uptake of 58.61 cm³ g -1 (2.63 mmol g -1 , 11.6 wt % at standard temperature and pressure) in a reversible manner at 195 K, showcasing its permanent porosity.
Competing Interests: The authors declare no conflict of interest.
Databáze: MEDLINE
Externí odkaz:
Nepřihlášeným uživatelům se plný text nezobrazuje