Tuning of luminescent and magnetic properties via metal doping of Zn-BTC systems
Închide
Conţinutul numărului revistei
Articolul precedent
Articolul urmator
718 0
SM ISO690:2012
QU, Taoguang, WEI, Qiang, ORDONEZ, Carlos, LINDLINE, Jennifer, PETRONIS, Michael , FONARI, Marina, TIMOFEEVA, Tatiana. Tuning of luminescent and magnetic properties via metal doping of Zn-BTC systems. In: Crystals, 2018, vol. 8, p. 0. ISSN 2073-4352. DOI: https://doi.org/10.3390/cryst8040162
EXPORT metadate:
Google Scholar
Crossref
CERIF

DataCite
Dublin Core
Crystals
Volumul 8 / 2018 / ISSN 2073-4352

Tuning of luminescent and magnetic properties via metal doping of Zn-BTC systems

DOI:https://doi.org/10.3390/cryst8040162

Pag. 0-0

Qu Taoguang1, Wei Qiang1, Ordonez Carlos1, Lindline Jennifer2, Petronis Michael 2, Fonari Marina13, Timofeeva Tatiana1
 
1 New Mexico Highlands University, Department of Chemistry, Las Vegas,
2 New Mexico Highlands University, Department of Natural Resources Management, Las Vegas,
3 Institute of Applied Physics, Academy of Sciences of Moldova
 
Proiecte:
 
Disponibil în IBN: 7 mai 2018


Rezumat

In order to assess how metal doping affects the luminescence and magnetic properties of anionic Metal-Organic Frameworks (MOFs), seven single-metal doped MOFs {M-Zn-BTC}{Me2NH2 +} (M = Co, Cu, Ni, Mn, Ca, Mg, Cd) and three dual-metal doped MOFs {Zn-M1-M2-BTC}{Me2NH2 +} (M1 = Co, Cu, M2 = Ni, Co) were synthesized. Trace amounts of different metals were doped via addition of another metal salt during the synthetic process. All compounds retained the same crystal structure as that of the parent {Zn-BTC}{Me2NH2 +} MOF, which was supported by single crystal and powder X-ray diffraction studies. Thermal Gravimetric Analysis (TGA) of these compounds also revealed that all MOFs had similar stability up to ~450 _C. Solid state photoluminescent studies indicated that {Zn-Mn-BTC}{Me2NH2 +}, {Zn-Cd-BTC}{Me2NH2 +}, and {Zn-Ca-BTC}{Me2NH2 +} had a significant red shifting effect compared to the original {Zn-BTC}{Me2NH2 +} MOF. Applications of this doping method to other MOF systems can provide an efficient way to tune the luminescence of such systems, and to obtain a desired wavelength for several applications such as sensors and white light LED materials. Because Zn, Co, Cu, Ni, Mg have magnetic properties, the effect of the doping metal atom on the magnetism of the {Zn-BTC}{Me2NH2 +} networks was also studied. To characterize the magnetic behavior of the synthesized MOFs, we conducted low-temperature (10 K) saturation remanence experiments in a 3 Tesla applied field, with the principal goal of identifying the domain state of the synthesized materials (Zn, Zn-Co, Zn-Cu-Co, Zn-Cu-Ni, Zn-Mg, Zn-Mn, Zn-Ni-Co, Zn-Ni). During room/low temperature saturation magnetization experiments, Zn, Zn-Co, Zn-Cu-Co, and Zn-Cu-Ni systems yielded data indicative of superparamagnetic behavior, yet during zero field and field cooled experiments Zn-Co showed a slight paramagnetic effect, Zn showed no temperature dependence on warming and Zn-Cu-Co and Zn-Cu-Ni demonstrated only a slight temperature dependence on warming. These behaviors are consistent with ferromagnetic ordering. Zero field and field cooled experiments indicate that Zn-Mg and Zn-Ni have a ferromagnetic ordering and Zn-Mn and Zn-Ni-Co show paramagnetic ordering behavior.

Cuvinte-cheie
Fluorescence, Magnetic ordering behavior, Metal doping, MOFs