synthesis of http-mofs on hopg poster
TRANSCRIPT
Printing:This poster is 48” wide by 36” high. It’s designed to be printed on a large
Customizing the Content:The placeholders in this formatted for you. placeholders to add text, or click an icon to add a table, chart, SmartArt graphic, picture or multimedia file.
Tfrom text, just click the Bullets button on the Home tab.
If you need more placeholders for titles, make a copy of what you need and drag it into place. PowerPoint’s Smart Guides will help you align it with everything else.
Want to use your own pictures instead of ours? No problem! Just rightChange Picture. Maintain the proportion of pictures as you resize by dragging a corner.
OBJECTIVEINTRODUCTION
Design and Synthesis of Electrochemically Active Metal Organic Frameworks for Voltage-Driven Capture and Release of Ethylene
Ethylene is widely used within the chemical industry, and isproduced more than any other organic compound.Currently, the purification process of ethylene (e.g. steamor catalytic cracking and cryogenic distillation) is energy-intensive and expensive. Wang and Steifel proposed thatthe use of voltage-driven, chemically specific separationreagents, such as nickel-dithiolene complex, can be apotentially inexpensive and efficient approach for thepurification of olefins.
EXPERIMENTAL DESIGN
Metal Organic Frameworks (MOFs) have remarkableproperties that may help address global challenges in gaspurification. The design and synthesis of MOFs that can actas nanostructured porous electrodes to enable reversiblebinding of ethylene may advance energy-efficient strategiesfor the purification and separation of olefins.
Synthesis of HTTP:
Special thanks to the Mirica Group, the Women in Science Program, and the Dartmouth Chemistry Department.
V
Multicomponent
Stream (MCS)
+
MCS
V2
V1
MOF
electrochemically active
porous solid supported
MOF nanostructures
voltage-actuated
capture and release
of ethylene
ligand
MCS without
purified
(a) R. Eisenberg et al., Inorg. Chem., 2011, 50, 9741-9751. (b) K. Wang et al., Science, 2001, 291 106-108
Here we illustrate the theory behind purification of ethyleneby Ni-bisdithiolene based MOFs. Increasing the size of thebisdithiolene-containing aromatic backbone increases theporosity and the electron density, affecting the efficiency ofethylene capture and purification.
dd d
L1
L2
L3
Hypothesis 1: increasing diameter (affects gas diffusion kinetics)
Hypothesis 2: decreasing band gap (affects activation energy, conductivity, electrochemistry)
L1: Kambe et al., J. Am. Chem. Soc., 2013, 135. Liu et al., J. Phys. Chem., 2016, 120.L2: Marinescu et al., J. Am. Chem. Soc., 2015, 137. Cui and Xu, Chem. Commun., 2014, 50, 3986. Dong et al., Angew. Chem. Int. Ed., 2015, 54.
0
200
400
600
800
1000
1200
1400
1600
0 1 2 3 4 5 6 7 8 9 10
Co
un
ts
Energy (keV)
EDS of Cu3(HTTP)2 MOF on HOPG
Cu
C
Cu
CuO
S
Cu
Cu3(HTTP)2 MOF:
Ni3(HTTP)2 MOF:
Co3(HTTP)2 MOF:R. Dong et al., Angew. Chem. Int. Ed., 2015, 54.
Synthesis of MOF:
Alice Hsu, WISP Intern; Xiaoping Zhang, Post-Doc; Katherine Mirica, PI; Mirica Group. Affiliation: Department of Chemistry, Dartmouth College
M I R I C AG R O U P
2μm 1μm10μm
10μm 2μm20μm
0
500
1000
1500
2000
2500
3000
3500
4000
0 1 2 3 4 5 6 7 8 9 10
Co
un
ts
Energy (keV)
EDS of Ni3(HTTP)2MOF on HOPG
C
O
Ni
Si
S
SNi
Ni
2μm 2μm5μm
0
1000
2000
3000
4000
5000
6000
7000
0 1 2 3 4 5 6 7 8 9 10
Co
un
ts
Energy (keV)
EDS of Co3(HTTP)2 MOF on HOPGC
O
Co Si
SCo Co
Co
METHODS
ACKNOWLEDGEMENTS
• HTTP has been successfully made and characterized.
• MOFs form nanocrystals on HOPG surface differentlydepending on the metal center.
• Continue the synthesis and characterization of HTTP-based MOFs with different metal centers.
M I R I C AG R O U P
RESULTS
CONCLUSIONS AND FUTURE WORK
A B C
D E F
G H I