TY - JOUR
T1 - Electrochemical behavior of [Cu 3(BTC) 2] metal-organic framework
T2 - The effect of the method of synthesis
AU - Loera-Serna, Sandra
AU - Oliver-Tolentino, Miguel A.
AU - De Lourdes López-Núñez, Ma
AU - Santana-Cruz, Alejandra
AU - Guzmán-Vargas, Ariel
AU - Cabrera-Sierra, R.
AU - Beltrán, Hiram I.
AU - Flores, Jorge
N1 - Funding Information:
The authors would like to thank the financial support giving through the Projects CONACyT (154736, 101319) and ICyTDF PICS (09-321, 08-29). M.A.O.T gratefully acknowledges the CONACyT for a scholarship.
PY - 2012/11/5
Y1 - 2012/11/5
N2 - For the construction of the metal-organic framework [Cu 3(BTC) 2] (commonly known as MOF-199 or HKUST-1), three different synthesis strategies were employed: room temperature stirring (RT), solvothermal (ST) and ultrasonic assisted (US); which afforded the desired material in moderate yields. Several characterization techniques (XRD, FT-IR, SEM and TGA) showed that HKUST-1 was obtained in every method. However, there were found interesting differences in functionalization depending on the synthesis conditions which produced the same [Cu 3(BTC) 2] host net but with different coordinative and bulk molecular guests. By XRD pattern analysis, it was possible to identify characteristic peaks of Cu 2O in the ST obtained material as secondary phase, showing that this methodology is quite harsh giving place to this product, although the [Cu 3(BTC) 2] complex was obtained in good yield. Regardless the energy source applied, in all three cases the desired [Cu 3(BTC) 2] MOF was obtained. In order to determine if the method of synthesis impacts directly on the electrochemical behavior of de material, applied cyclic voltammetry (CV), chronoamperometry (CA) and electrochemical impedance spectroscopy (EIS) were investigated. The electrochemical results have shown that the resistance to the faradic process increases in the following order: Cu-MOF US, Cu-MOF RT and Cu-MOF ST. This behavior can be associated to the presence of Cu 2O in Cu-MOF ST. However, the synthesized MOF at room temperature showed a major content of copper, which could be electrochemically transformed, as well as purity, in comparison with those obtained by solvothermal and ultrasonic assisted methods.
AB - For the construction of the metal-organic framework [Cu 3(BTC) 2] (commonly known as MOF-199 or HKUST-1), three different synthesis strategies were employed: room temperature stirring (RT), solvothermal (ST) and ultrasonic assisted (US); which afforded the desired material in moderate yields. Several characterization techniques (XRD, FT-IR, SEM and TGA) showed that HKUST-1 was obtained in every method. However, there were found interesting differences in functionalization depending on the synthesis conditions which produced the same [Cu 3(BTC) 2] host net but with different coordinative and bulk molecular guests. By XRD pattern analysis, it was possible to identify characteristic peaks of Cu 2O in the ST obtained material as secondary phase, showing that this methodology is quite harsh giving place to this product, although the [Cu 3(BTC) 2] complex was obtained in good yield. Regardless the energy source applied, in all three cases the desired [Cu 3(BTC) 2] MOF was obtained. In order to determine if the method of synthesis impacts directly on the electrochemical behavior of de material, applied cyclic voltammetry (CV), chronoamperometry (CA) and electrochemical impedance spectroscopy (EIS) were investigated. The electrochemical results have shown that the resistance to the faradic process increases in the following order: Cu-MOF US, Cu-MOF RT and Cu-MOF ST. This behavior can be associated to the presence of Cu 2O in Cu-MOF ST. However, the synthesized MOF at room temperature showed a major content of copper, which could be electrochemically transformed, as well as purity, in comparison with those obtained by solvothermal and ultrasonic assisted methods.
KW - Cu (BTC)
KW - Electrochemical behavior
KW - Electrochemical characterization
KW - Metal-organic frameworks
KW - Redox potential
KW - Synthesis
UR - http://www.scopus.com/inward/record.url?scp=84864399209&partnerID=8YFLogxK
U2 - 10.1016/j.jallcom.2012.06.030
DO - 10.1016/j.jallcom.2012.06.030
M3 - Artículo
SN - 0925-8388
VL - 540
SP - 113
EP - 120
JO - Journal of Alloys and Compounds
JF - Journal of Alloys and Compounds
ER -