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85 results on '"Huddleston, Jonathan G."'

4. Design strategies for solid-state supramolecular arrays containing both mixed-metalated and freebase porphyrins

Author

Sharma, C.V. Krishnamohan, Broker, Grant A., Huddleston, Jonathan G., Baldwin, Jeffrey W., Metzger, Robert M., and Rogers, Robin D.

Subjects
Porphyrins -- Research, Metal halides -- Research, Photosynthesis research -- Analysis, Coordination compounds -- Research, Chemistry
Abstract

An experiment reports a novel crystal-engineering design strategy to imbed practically unlimited numbers of porphyrin chromophores in desirable, controlled metalation states into highly organizable, rigid, one-dimensional and/or two-dimensional crystalline, supramolecular arrays. The approach enables a virtually limitless number of metal ions to be inserted into the polymeric porphyrin arrays and is therefore relevant to the design of light harvesting model systems.

Published
1999

19. Controlling the aqueous miscibility of ionic liquids: aqueous biphasic systems of water-miscible ionic liquids and water-structuring salts for recycle, metathesis, and separations

Author

Gutowski, Keith E., Broker, Grant A., Willauer, Heather D., Huddleston, Jonathan G., Swatloski, Richard P., Holbrey, John D., and Rogers, Robin D.

Subjects
Ionic solutions -- Research, Solubility -- Control, Water chemistry, Chemistry
Abstract

The use of water-immiscible room-temperature ionic liquids (ILs) in place of volatile organic solvents (VOCs) for the separation of neutral organic molecules and metal ions is investigated. The ability to control the aqueous miscibility of ILs, particularly the hydrophilic type, is of particular importance in areas such as separations technology.

Published
2003

43. Metal Ion Separations in Aqueous Biphasic Systems and with ABEC™ Resins.

Author

Walker, John M., Hatti-Kaul, Rajni, Huddleston, Jonathan G., Griffin, Scott T., Zhang, Jianhua, Willauer, Heather D., and Rogers, Robin D.

Abstract

Solvent extraction is a proven technology for the recovery of metal ions from aqueous solution (1,2). Through the application of different diluents, extractants, and aqueous phase conditions, the technique may be adapted to handle a wide variety of solutes. Extraction kinetics are often rapid, enabling high throughput, and the technology may be engineered for selectivity and efficiency through the use of multistage contactors. However, there are disadvantages to the employment of aqueous/organic extraction schemes. In paticular, many utilize toxic and flammable organic diluents, which may add significant cost to the overall process design and which are highly regulated owing to their environmental impact. [ABSTRACT FROM AUTHOR]

Published
2000
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