C
Charles S. Spanjers
Researcher at University of Minnesota
Publications - 21
Citations - 568
Charles S. Spanjers is an academic researcher from University of Minnesota. The author has contributed to research in topics: Catalysis & Flame ionization detector. The author has an hindex of 11, co-authored 21 publications receiving 458 citations. Previous affiliations of Charles S. Spanjers include Pennsylvania State University & National Science Foundation.
Papers
More filters
Journal ArticleDOI
Polylactide-poly(dimethylsiloxane)-polylactide triblock copolymers as multifunctional materials for nanolithographic applications.
TL;DR: The formation of well-ordered arrays of hexagonally packed PDMS cylinders oriented normal to the substrate, the orthogonal etchability of these cylinders and the PLA matrix, and the formation of etch-resistant domains that can be used as pattern transfer masks are demonstrated.
Journal ArticleDOI
Biomass-Derived Butadiene by Dehydra-Decyclization of Tetrahydrofuran
Omar A. Abdelrahman,Omar A. Abdelrahman,Dae Sung Park,Katherine P. Vinter,Charles S. Spanjers,Limin Ren,Limin Ren,Hong Je Cho,Hong Je Cho,Dionisios G. Vlachos,Dionisios G. Vlachos,Wei Fan,Wei Fan,Michael Tsapatsis,Michael Tsapatsis,Paul J. Dauenhauer,Paul J. Dauenhauer +16 more
TL;DR: In this article, it was demonstrated that tetrahydrofuran with phosphorus-containing siliceous self-pillared pentasil (SPP) or MFI structure exhibits high selectivity to butadiene (85-99%) at both low (9%) and high (89%) conversion of THF.
Journal ArticleDOI
Zinc inclusion to heterogeneous nickel catalysts reduces oligomerization during the semi-hydrogenation of acetylene
Charles S. Spanjers,Jacob T. Held,Michael J. Jones,Donavin D. Stanley,Richard S. Sim,Michael J. Janik,Robert M. Rioux +6 more
TL;DR: In this article, isotopic labeling and density functional theory (DFT) were used to determine the mechanism for acetylene hydrogenation and oligomerization on well-defined intermetallic nickel-zinc catalysts.
Journal ArticleDOI
Renewable Isoprene by Sequential Hydrogenation of Itaconic Acid and Dehydra-Decyclization of 3-Methyl-Tetrahydrofuran
Omar A. Abdelrahman,Dae Sung Park,Dae Sung Park,Katherine P. Vinter,Charles S. Spanjers,Charles S. Spanjers,Limin Ren,Hong Je Cho,Kechun Zhang,Kechun Zhang,Wei Fan,Michael Tsapatsis,Paul J. Dauenhauer,Paul J. Dauenhauer +13 more
TL;DR: In this article, a one-pot cascade reaction converted itaconic acid to 3-methyl-tetrahydrofuran (3-MTHF) at ∼80% yield with Pd-Re/C catalyst and 1000 psig H2.
Journal ArticleDOI
In Situ Spectroscopic Characterization of Ni1–xZnx/ZnO Catalysts and Their Selectivity for Acetylene Semihydrogenation in Excess Ethylene
TL;DR: In this article, the structures of ZnO-supported Ni catalysts were explored with in situ X-ray absorption spectroscopy, temperature-programmed reduction, Xray diffraction, high-resolution transmission electron microscopy (HRTEM), scanning transmission electron microscope (SEM), and electron energy loss spectrum analysis.