Roy A. Periana

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Roy A. Periana
The Scripps Research Institute

The University of Southern California

Catalytica Inc.
Catalytica Advanced Technologies
Dow Chemical

Monsanto Company
Doctoral advisorRobert G. Bergman

Roy A. Periana is a Guyanese-American

organometallic chemist
.

Biography

Early life

He was born in

dissertation
was entitled, "Mechanism of Oxidative Addition of Cyclopentadienyl-Rhodium Complexes to Carbon-Hydrogen and Carbon-Carbon Bonds."

Career

After graduation, Periana joined the

Scripps Research Institute. In 2007, the Scripps Energy & Materials Center
was founded as a center to enable a new generation of chemistry for a sustainable planet.

CH4 and other hydrocarbons, (N2, O2, H2O, and CO2) are among the most abundant raw materials on Earth. The conversion of these small molecules generate the majority of the world's energy and materials and the bulk of CO2 emissions. The bonds (forces) that hold the atoms together in all of these small molecules are among the strongest known in chemistry. In spite of over 75 years of research, the chemistries to control and break these bonds at lower temperatures have not been developed. As a result, current technologies to convert these raw materials are inefficient and lead to substantially more

catalysts that can facilitate the cleavage of strong bonds of these raw materials. One main area of focus of much of Periana's career has been on the selective, partial oxidative conversion of methane (CH4, the main component of natural gas) to methanol
(MeOH). The general strategy that is being utilized is the design of molecular catalysts that operate by CH activation: a reaction whereby a molecular catalyst, MX, can react with and cleave the RH bond to generate M-R intermediates under mild conditions with high selectivity. Continuous functionalization of these MR intermediates to products with regeneration of MX leads to a very effective catalytic cycle for direct, selective alkane functionalization.

AlkaneOxCy
AlkaneOxCy

Periana has demonstrated several working examples of molecular catalysts based on electrophilic

CH activation (generates positive charge on the C during CH cleavage) that operate in sulfuric acid (H2SO4) to convert methane to methyl bisulfate, the sulfate ester of methanol in high yield and selectivity. The two most prominent examples of this work involved the use of Hg(II) cations [4] or a Pt(bpym)Cl2 complex.[5]
In addition to increasing the rate at which the CH bond is cleaved central to the success of this approach has been the use of the acid solvent to both activate the catalyst as well as "protect" the alcohol product through protonation reactions.

Periana published an article in the multidisciplinary journal Science describing the use of main group trifluoroacetate salts of lead and thallium that convert a natural gas stream (comprising methane, ethane, and propane) to the respective trifluoroacetate esters.[6] It was found that the system readily led to the rapid oxidation of the natural gas stream at 180 °C and was capable of reacting with a mixed gas stream or each alkane independently.[7]

He has since extended his work on

ligands that participate in the reaction by protonation or deprotonation.[8][9] This allowed for the demonstration of the first example of aqueous base accelerated CH activation involving the use of a Ru(IPI)Cl3 pre-catalyst where IPI = 2,6-diimidizoylpyridine.[10]
This strategy has led to demonstration of CH activation by a Ru(II)(IPI)(OH)n(H2O)m complex dissolved in aqueous KOH. As hoped, it was found that rates of CH activation are accelerated by increasing [KOH].

Periana is currently the Director of the Scripps Energy & Materials Center, (SEMC). Periana's broad vision for SEMC is to bring together all the disparate skills and expertise in the activation of strong bonds in the small molecules CH4, N2, O2, H2O, and CO2 under one roof with the goal of developing a new generation of clean, cost-effective technologies for a sustainable planet in the 21st century.

Awards and professional activities

Roy Periana has been involved in a variety of synergistic activities:

  • Co-Founder and Member of Board of Directors, Qateomix, Inc. Covina, CA[when?]
  • Japan Society for the Promotion of Science (JSPS) Fellowship, 2007
  • Topics in Current Chemistry. Volume Editor: C-H Activation, 2005
  • Seminaire Hors-Ville en Chimie Inorganique Switzerland, September, 2001
  • Catalytica Adv. Technologies, Inc. Co-Founder and Vice President 1994-2000
  • Chairman of National ACS Inorganic Symposium in 1999
  • Publications in Science (1993, 1998, 2003 & 2014). Wide coverage in various media: C&E News, Wall Street Journal, New York Times, etc.
  • Invited Speaker at 1993, 1997 and 1999 Gordon Organometallic and Inorganic Reaction Mechanisms Conferences
  • Achievement Award, Monsanto Company, 1987 and 1988
  • Graduate Scholastic Honor Society, U.C. Berkeley, 1983 - 1985
  • Keynote Speaker at the 1998, Bloomberg Conference on Energy
  • Keynote Speaker at 1998, Zimmerman Organometallic Workshop

References

  1. PMID 22482496
    .
  2. doi:10.1021/ja00283a032
    .
  3. doi:10.1021/ja00283a033
    .
  4. S2CID 21140403
    .
  5. PMID 9554841
    .
  6. S2CID 25107449
    .
  7. ^ "The Key to the Next Energy Revolution". Science Now. 2014. https://www.science.org/content/article/key-next-energy-revolution
  8. S2CID 206529865
    .
  9. doi:10.1039/C0NJ00776E
    .
  10. PMID 20734988
    .

External links

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