analytical chemistry division 2014
DESCRIPTION
Analytical Chemistry Division 2014. Analytical Chemistry. Not JUST titrations! We’re doing research in topics as diverse as better batteries, labs-on-chips, forensics, explosives detection and degradation, and better body armor. We use almost every instrument you’ve seen plus some. - PowerPoint PPT PresentationTRANSCRIPT
Analytical Chemistry Division
2014
Analytical Chemistry• Not JUST titrations!• We’re doing research in topics as diverse as
better batteries, labs-on-chips, forensics, explosives detection and degradation, and better body armor.
• We use almost every instrument you’ve seen plus some.
• Two of the departments’ scanning probe instruments are in the Analytical Division.
Analytical Chemistry Members• CDR Rob Calhoun• Professor Graham Cheek• Professor Christine Copper• Professor Judith Hartman• Associate Professor Dianne Luning Prak• Professor Dan O’Sullivan• Professor Maria Schroeder• Associate Professor Ron Siefert• Professor Paul Trulove
RESEARCH INTERESTSProf. G. CheekMi 144 36625
Electrochemistry of organic compounds1. Effect of Lewis acids on reaction pathways2. Bio-electrochemistry of amino acids
3. Kolbe reaction RCOO- - 1 e- RCOO.
RCOO. → R. + CO2
2 R. → R2
Solvents : Ionic liquids, water, acetonitrileN
+CF3 SO3 -
Forensic Applications1. Soil Characterization : X-Ray Fluorescence2. Paper / Ink Characterization : Raman Spectroscopy
RESEARCH INTERESTS Prof. G. Cheek
Effect of Lewis acids on organic reactions
-20
-10
0
10
20
-3-2-1012
Cur
rent
, uA
Potential, V vs Ag / AgCl
+ Yb(TfO)3
Ionic liquid BMPY TfON
+CF3 SO3 -
Use of NMR, UV-VIS ?
Bio-electrochemistry of amino acids
- 2 e-
- 2 H+
cysteine
cystine
also dipeptides ?
Prof Christine [email protected]
Michelson 265
project will also include collaboration with scientists at the Naval Research Laboratory, Washington, D.C. or at Drexel University
Development of Separation and Detection Methods for Environmentally
Important Molecules
Capillary Electrophoresis (CE)
*Separation is achieved based on different rates of migration of charged species in an applied electric field.
Capillary
Lamp
Inlet Buffer/Sample Injection Outlet Buffer
Data Collection/Storage
vi = uapp E
High Voltage Power +-
DetectorDetector
Electrophoresis
+----
+++
++
++--
----
• CE was first used in the early 1980’s.• Reasonably high sensitivity (ppm or ppb)• Short separation time (<5 min)• Small Sample Volume (nanoliters)• Can be done on a microchip device instead of
in a column
Instrumentation
This automated instrument can run samples when you are not there!
CE instrument is in MI 264.
Capillary Electrophoresis can be used to detect…
• Explosives in seawater• Poisons in beverages• Ozone in submarine atmospheres• Nerve agents in atmospheres• Polyaromatic hydrocarbons in environmental samples• Carbon monoxide poisoning in blood• Illicit drugs in urine
Current students:Micala Migneault and Clay Aronica
http://greenfleet.dodlive.mil/energy/great-green-fleet/ Midn 1/C Sarah Alexandre
Fuel certification program/Office of Naval Research Goal: Analysis and testing of alternative fuels: density, viscosity, surface tension, speed of sound, bulk modulus, flash point, enthalpy of combustion (bomb calorimetry)
Luning Prak, D. J., Alexandre, S. M., Cowart, J. S., Trulove, P.C., “Density, Viscosity, Speed of Sound, Bulk Modulus, Surface Tension, and Flash Point of Binary Mixtures of N-Dodecane with 2,2,4,6,6-Pentamethylheptane or 2,2,4,4,6,8,8-Heptamethylnonane” submitted to J. Chem. Eng. Data, 1/14
July 19-20, 2012 demonstration successfully evaluated the performance of “drop in replacement” advanced biofuel [50-50 mixtures of biofuel (made from used cooking oil and algae) and petroleum-based marine diesel or aviation fuel. ]
Assoc. Prof. Dianne Luning Prak ([email protected]) & Prof. Paul Trulove
Luning Prak, D.J., Milewski, E.A., Jedlicka, E.E., Kersey, A.J., O’Sullivan, D.W., 2013, “Influence of pH, Temperature, Salinity, and Dissolved Organic Matter on the Photolysis of 2,4-dinitrotoluene and 2,6-dinitrotoluene in Seawater,” Marine Chemistry, 157, 233-241.
How does the photolysis behavior of munitions constituents in marine systems differ from that in fresh water systems? · salinity · nitrate · dissolved organic matter
Unexploded Ordnance in shallow waters
Photolysis of munitions constituents
http://www.SERDP.org Midn 1/C James Breuer
HPLC with autosampler
SUNSHINE LABSolar Simulator Project involves
· preparing solutions · using solar simulator · analyzing samples with HPLC · identifying products solid-phase extraction, LC/MS
Professor Schroeder’s Research Interests
Harold Edgerton, photographer - Improved Polymer Coatings for:
- Military Transport (Humvees)- Body Armor- Hazardous Material Transport (DTRA)- Transparent Armor (ARL)
- Laboratory Development:- Experiments in support of Chemistry of Cooking course- Experiments for the IL courses
Projectile hitting elastomer at > 500 mph
Motivation for Coatings Research• To understand the mechanisms
of impact protection of polymer-coated surfaces
projectiles hitting elastomers at
high speed protection no protection
• To understand temp effects (Tg)• To utilize nanoparticles
• To improve armor protection
Polymer synthesis, characterization, processing
Engineering, physical and mechanical testing
Materials Science Ballistic testing
Basic research with military
applications
Continuing Student Project (DTRA)Protective Coatings for Hazardous Material Transport
Research Collaboration:Naval Research Laboratory (NRL)
Defense Threat Reduction Agency (DTRA)
Train Derailment – Lac-Megantic, Quebec74 train cars containing crude oil42 persons killed, 30 buildings destroyedJuly 6, 2013
Current Research Student1/C Philip Solt
North Dakota Dec 31, 2013
Ron SiefertAssociate Professor
3-6336 (office), Mi-243 (office), Mi-240 (lab)
Iron in Marine Aerosols
Vehicle NH3 Emissions Agricultural NH3 Emissions
Current Projects / Development of Nanoporous Sorbent Materials
Deposition of Nutrients to Surface Waters
Novel Sorbents (PMOs: periodic mesoporous organisilicas) -For Analysis of Nitroenergetics (i.e, explosives)-For Analysis of Perchlorates (used as propellants)-As a substrate for catalysts to destroy contaminants
Past Projects
Measurements in the Chesapeake Bay
Enhanced Detection of Explosives and Related Compounds
OBJECTIVE: Develop organosilicas as sorbents applicable to the preconcentration of nitroenergetics and perchlorates for enhancement of in situ detection techniquesAPPROACH: Characterize the binding characteristics (e.g., selectivity, capacity, kinetics) of imprinted PMOs for nitroenergetics and perchlorate propellants. Use of HPLC and IC.
Nanoporous Photocatalysts for Decontamination of Nerve Agents
Lab on a ChipMicrofluidic devices using electro-osmotic flow.
Department of Chemistry
Natural Fiber Welding - Ionic Liquid Facilitated Biopolymer Mobilization and Reorganization
Prof. Paul C. Trulove, MI248, [email protected], 3-6622
ST
ATU
S Q
UO
NEW
INSI
GH
TS
QU
AN
TITATIVE IM
PAC
T E
ND
-OF-P
HA
SE
GO
AL
Research GoalsDevelop multi-functional natural materials and coatings with unique electronic, optical, and sensing properties for Air Force and DoD relevant applications in areas such as ballistic protection, energy storage, microelectronics, stealth, laser eye protection, optical computing, chem./bio sensing, in-situ medical applications
MAIN ACHIEVEMENTS·Investigated the impact co-solvent properties on the natural fiber welding process
·Demonstrated Inkjet printing of ionic liquids on natural fiber substrates
·Utilized Laser heating to spatially control the welding of natural fiber substrates
·Developed a continuous fiber welding process to coat yarns with functional solid materials
·Evaluated the electrochemical and knitting properties of yarn based supercapacitors
·Studied incorporation of fire retardant materials in natural yarns via fiber welding
Ionic Liquids Solvents·We have shown that ionic liquids are powerful solvents for the dissolution and processing of a wide variety of natural polymers.
·The solvating ability of ionic liquids provides a powerful tool for the modification and processing of natural polymers.
Natural Polymers·Natural polymers are renewable materials that have many attractive properties. Some natural silks have strength and toughness comparable to the best synthetic polymers.
·The ability to modify and tailor the shape and properties of natural polymers is limited.
Current Impact·Producing natural materials with dramatically enhanced mechanical properties
·Enabling tuneable natural material properties with high spatial resolution
·Facilitating the integration of functional solid materials with electrical, magnetic and optical properties into natural fiber matrices
N N
R'
R R''
+CH3COO−
Natural materials with dramatically enhanced physical and chemical properties
17
Department of Chemistry
Control of Natural Fiber Welding Using Inkjet Printing of Ionic Liquids
Movies Obtained from Wikipediahttp://en.wikipedia.org/wiki/Micro_Piezo
piezoelectric inkjet
thermal inkjet
18Yellow – Rhodamine/Ionic LiquidGreen – Substrate
Department of Chemistry
Laser Induced Natural Fiber Welding
CNC 40 W CO2 laser with raster and/or vector operation by Full Spectrum Laser (www.fslaser.com)
Laser
NaturalFiber
Substrate
IonicLiquid AFOSR
Use a Laser to Spatially Control the Welding of Ionic Liquid Coated Cotton Paper
19
Department of Chemistry20
Use of Ionic Liquids to Fabricate Biopolymer Composite Materials
Knitted Electrochemical Capacitors for Smart Textiles*
*Collaboration with Drexel University
Bamboo (0.54 mg/cm)
BeforeTreatment
AfterTreatment
Department of Chemistry
+ + +
Yarn Separator
Yarn Electrode
Yarn Electrode
Knitted Linen/Bamboo/Viscose Capacitors!
21
separator
VERY FLEXIBLE!
Questions?