Monte L. Helm, Ph.D. - Publications

Affiliations: 
University of Colorado, Boulder, Boulder, CO, United States 
Area:
Main Group Chemistry

64 high-probability publications. We are testing a new system for linking publications to authors. You can help! If you notice any inaccuracies, please sign in and mark papers as correct or incorrect matches. If you identify any major omissions or other inaccuracies in the publication list, please let us know.

Year Citation  Score
2015 Wiedner ES, Brown HJ, Helm ML. Kinetic Analysis of Competitive Electrocatalytic Pathways: New Insights into Hydrogen Production with Nickel Electrocatalysts. Journal of the American Chemical Society. PMID 26692398 DOI: 10.1021/jacs.5b10853  0.8
2015 Raugei S, Helm ML, Hammes-Schiffer S, Appel AM, O'Hagan M, Wiedner ES, Bullock RM. Experimental and Computational Mechanistic Studies Guiding the Rational Design of Molecular Electrocatalysts for Production and Oxidation of Hydrogen. Inorganic Chemistry. PMID 26653114 DOI: 10.1021/acs.inorgchem.5b02262  0.8
2015 Cosimbescu L, Wei X, Vijayakumar M, Xu W, Helm ML, Burton SD, Sorensen CM, Liu J, Sprenkle V, Wang W. Anion-Tunable Properties and Electrochemical Performance of Functionalized Ferrocene Compounds. Scientific Reports. 5: 14117. PMID 26374254 DOI: 10.1038/srep14117  0.8
2015 Bullock RM, Helm ML. Molecular Electrocatalysts for Oxidation of Hydrogen Using Earth-Abundant Metals: Shoving Protons Around with Proton Relays. Accounts of Chemical Research. PMID 26079983 DOI: 10.1021/acs.accounts.5b00069  0.8
2015 Cheng Y, Stolley RM, Han KS, Shao Y, Arey BW, Washton NM, Mueller KT, Helm ML, Sprenkle VL, Liu J, Li G. Highly active electrolytes for rechargeable Mg batteries based on a [Mg2(μ-Cl)2](2+) cation complex in dimethoxyethane. Physical Chemistry Chemical Physics : Pccp. 17: 13307-14. PMID 25920549 DOI: 10.1039/c5cp00859j  0.8
2015 Peterson SM, Helm ML, Appel AM. Nickel complexes of a binucleating ligand derived from an SCS pincer. Dalton Transactions (Cambridge, England : 2003). 44: 747-52. PMID 25407101 DOI: 10.1039/c4dt02718c  0.8
2015 Darmon JM, Kumar N, Hulley EB, Weiss CJ, Raugei S, Bullock RM, Helm ML. Increasing the rate of hydrogen oxidation without increasing the overpotential: A bio-inspired iron molecular electrocatalyst with an outer coordination sphere proton relay Chemical Science. 6: 2737-2745. DOI: 10.1039/c5sc00398a  0.8
2015 Brown HJS, Wiese S, Roberts JAS, Bullock RM, Helm ML. Electrocatalytic hydrogen production by [Ni(7PPh 2NH)2]2+: Removing the Distinction between endo- and exo-protonation sites Acs Catalysis. 5: 2116-2123. DOI: 10.1021/cs502132y  0.8
2015 Miller DL, Boro BJ, Grubel K, Helm ML, Appel AM. Synthesis and characterization of a triphos ligand derivative and the corresponding PdII complexes European Journal of Inorganic Chemistry. 2015: 5781-5785. DOI: 10.1002/ejic.201500791  0.8
2015 Dutta A, Lense S, Roberts JAS, Helm ML, Shaw WJ. The Role of Solvent and the Outer Coordination Sphere on H2 Oxidation Using [Ni(PCy 2NPyz 2)2]2+ European Journal of Inorganic Chemistry. 2015: 5218-5225. DOI: 10.1002/ejic.201500732  0.8
2014 Stolley RM, Helm ML. Light-harvesting materials: soft support for energy conversion. Nature Chemistry. 6: 949-50. PMID 25343594 DOI: 10.1038/nchem.2088  0.8
2014 Stolley RM, Darmon JM, Helm ML. Solvent and electrolyte effects on Ni(P(R)(2)N(R')2)(2)-catalyzed electrochemical oxidation of hydrogen. Chemical Communications (Cambridge, England). 50: 3681-4. PMID 24554087 DOI: 10.1039/c4cc00295d  0.8
2014 Das P, Ho MH, O'Hagan M, Shaw WJ, Bullock RM, Raugei S, Helm ML. Controlling proton movement: electrocatalytic oxidation of hydrogen by a nickel(II) complex containing proton relays in the second and outer coordination spheres. Dalton Transactions (Cambridge, England : 2003). 43: 2744-54. PMID 24306451 DOI: 10.1039/c3dt53074d  0.8
2014 Hulley EB, Helm ML, Bullock RM. Heterolytic cleavage of H2 by bifunctional manganese(i) complexes: Impact of ligand dynamics, electrophilicity, and base positioning Chemical Science. 5: 4729-4741. DOI: 10.1039/c4sc01801j  0.8
2014 Hou J, Fang M, Cardenas AJP, Shaw WJ, Helm ML, Bullock RM, Roberts JAS, O'Hagan M. Electrocatalytic H2 production with a turnover frequency >107 s-1: The medium provides an increase in rate but not overpotential Energy and Environmental Science. 7: 4013-4017. DOI: 10.1039/c4ee01899k  0.8
2014 Bullock RM, Appel AM, Helm ML. Production of hydrogen by electrocatalysis: Making the H-H bond by combining protons and hydrides Chemical Communications. 50: 3125-3143. DOI: 10.1039/c3cc46135a  0.8
2014 Galan BR, Wiedner ES, Helm ML, Linehan JC, Appel AM. Effects of phosphine-carbene substitutions on the electrochemical and thermodynamic properties of nickel complexes Organometallics. 33: 2287-2294. DOI: 10.1021/om500206e  0.8
2014 Weiss CJ, Egbert JD, Chen S, Helm ML, Bullock RM, Mock MT. Protonation studies of a tungsten dinitrogen complex supported by a diphosphine ligand containing a pendant amine Organometallics. 33: 2189-2200. DOI: 10.1021/om401127v  0.8
2014 Wiedner ES, Helm ML. Comparison of [Ni(PPh2NPh2)2(CH3CN)]2+ and [Pd(PPh2NPh2)2]2+ as electrocatalysts for H2 production Organometallics. 33: 4617-4620. DOI: 10.1021/om4010669  0.8
2014 Jeletic MS, Helm ML, Hulley EB, Mock MT, Appel AM, Linehan JC. A cobalt hydride catalyst for the hydrogenation of CO2: Pathways for catalysis and deactivation Acs Catalysis. 4: 3755-3762. DOI: 10.1021/cs5009927  0.8
2014 Weiss CJ, Das P, Miller DL, Helm ML, Appel AM. Catalytic oxidation of alcohol via nickel phosphine complexes with pendant amines Acs Catalysis. 4: 2951-2958. DOI: 10.1021/cs500853f  0.8
2014 Darmon JM, Raugei S, Liu T, Hulley EB, Weiss CJ, Bullock RM, Helm ML. Iron complexes for the electrocatalytic oxidation of hydrogen: Tuning primary and secondary coordination spheres Acs Catalysis. 4: 1246-1260. DOI: 10.1021/cs500290w  0.8
2014 Appel AM, Helm ML. Determining the overpotential for a molecular electrocatalyst Acs Catalysis. 4: 630-633. DOI: 10.1021/cs401013v  0.8
2014 Fang M, Engelhard MH, Zhu Z, Helm ML, Roberts JAS. Electrodeposition from acidic solutions of nickel bis(benzenedithiolate) produces a hydrogen-evolving Ni-S film on glassy carbon Acs Catalysis. 4: 90-98. DOI: 10.1021/cs400675u  0.8
2014 Das P, Stolley RM, Van Der Eide EF, Helm ML. A NiII-bis(diphosphine)-hydride complex containing proton relays - Structural characterization and electrocatalytic studies European Journal of Inorganic Chemistry. 2014: 4611-4618. DOI: 10.1002/ejic.201402250  0.8
2013 Hoffert WA, Roberts JA, Morris Bullock R, Helm ML. Production of H2 at fast rates using a nickel electrocatalyst in water-acetonitrile solutions. Chemical Communications (Cambridge, England). 49: 7767-9. PMID 23743801 DOI: 10.1039/c3cc43203c  0.8
2013 van der Eide EF, Helm ML, Walter ED, Bullock RM. Structural and spectroscopic characterization of 17- and 18-electron piano-stool complexes of chromium. Thermochemical analyses of weak Cr-H bonds. Inorganic Chemistry. 52: 1591-603. PMID 23343354 DOI: 10.1021/ic302460y  0.8
2013 Shaw WJ, Helm ML, DuBois DL. A modular, energy-based approach to the development of nickel containing molecular electrocatalysts for hydrogen production and oxidation. Biochimica Et Biophysica Acta. 1827: 1123-39. PMID 23313415 DOI: 10.1016/j.bbabio.2013.01.003  0.8
2013 Franz JA, O'Hagan M, Ho MH, Liu T, Helm ML, Lense S, Dubois DL, Shaw WJ, Appel AM, Raugei S, Bullock RM. Conformational dynamics and proton relay positioning in nickel catalysts for hydrogen production and oxidation Organometallics. 32: 7034-7042. DOI: 10.1021/om400695w  0.8
2013 Stewart MP, Ho MH, Wiese S, Lindstrom ML, Thogerson CE, Raugei S, Bullock RM, Helm ML. High catalytic rates for hydrogen production using nickel electrocatalysts with seven-membered cyclic diphosphine ligands containing one pendant amine Journal of the American Chemical Society. 135: 6033-6046. DOI: 10.1021/ja400181a  0.8
2013 Wiese S, Kilgore UJ, Ho MH, Raugei S, Dubois DL, Bullock RM, Helm ML. Hydrogen production using nickel electrocatalysts with pendant amines: Ligand effects on rates and overpotentials Acs Catalysis. 3: 2527-2535. DOI: 10.1021/cs400638f  0.8
2012 Jain A, Reback ML, Lindstrom ML, Thogerson CE, Helm ML, Appel AM, Shaw WJ. Investigating the role of the outer-coordination sphere in [Ni(P(Ph)2N(Ph‑R)2)2]2+ hydrogenase mimics. Inorganic Chemistry. 51: 6592-602. PMID 22662880 DOI: 10.1021/ic300149x  0.8
2012 Weiss CJ, Groves AN, Mock MT, Dougherty WG, Kassel WS, Helm ML, DuBois DL, Bullock RM. Synthesis and reactivity of molybdenum and tungsten bis(dinitrogen) complexes supported by diphosphine chelates containing pendant amines. Dalton Transactions (Cambridge, England : 2003). 41: 4517-29. PMID 22344347 DOI: 10.1039/c2dt12224c  0.8
2012 Wiedner ES, Yang JY, Chen S, Raugei S, Dougherty WG, Kassel WS, Helm ML, Bullock RM, DuBois MR, DuBois DL. Stabilization of nickel complexes with Ni 0H-N bonding interactions using sterically demanding cyclic diphosphine ligands Organometallics. 31: 144-156. DOI: 10.1021/om200709z  0.8
2012 Jain A, Helm ML, Linehan JC, Dubois DL, Shaw WJ. Biologically inspired phosphino platinum complexes Inorganic Chemistry Communications. 22: 65-67. DOI: 10.1016/j.inoche.2012.04.039  0.8
2012 Waggoner NW, Spreer LS, Boro BJ, Dubois DL, Helm ML. Group 10 complexes containing phosphinomethylamine ligands: Synthesis, structural analysis and electrochemical studies Inorganica Chimica Acta. 380: 14-21. DOI: 10.1016/j.ica.2011.07.001  0.8
2011 Kilgore UJ, Stewart MP, Helm ML, Dougherty WG, Kassel WS, DuBois MR, DuBois DL, Bullock RM. Studies of a series of [Ni(P(R)2N(Ph)2)2(CH3CN)]2+ complexes as electrocatalysts for H2 production: substituent variation at the phosphorus atom of the P2N2 ligand. Inorganic Chemistry. 50: 10908-18. PMID 21999814 DOI: 10.1021/ic201461a  0.8
2011 Helm ML, Stewart MP, Bullock RM, DuBois MR, DuBois DL. A synthetic nickel electrocatalyst with a turnover frequency above 100,000 s⁻¹ for H₂ production. Science (New York, N.Y.). 333: 863-6. PMID 21836012 DOI: 10.1126/science.1205864  0.8
2011 Galan BR, Schöffel J, Linehan JC, Seu C, Appel AM, Roberts JA, Helm ML, Kilgore UJ, Yang JY, DuBois DL, Kubiak CP. Electrocatalytic oxidation of formate by [Ni(P(R)2N(R')2)2(CH3CN)]2+ complexes. Journal of the American Chemical Society. 133: 12767-79. PMID 21692477 DOI: 10.1021/ja204489e  0.8
2011 Bullock RM, Yang JY, Roberts JAS, Kilgore UJ, Helm ML, Smith SE, Stewart MP, Dubois DL. Nickel(II) electrocatalysts with pendant amines as proton relays for production of hydrogen and oxidation of hydrogen Acs National Meeting Book of Abstracts 0.8
2010 Lowry DJ, Helm ML. Synthesis of 1,4,7-triphenyl-1,4,7-triphosphacyclononane: the first metal-free synthesis of a [9]-aneP(3)R(3) ring. Inorganic Chemistry. 49: 4732-4. PMID 20441207 DOI: 10.1021/ic100274m  0.8
2010 Carroll GM, Miller SM, Helm ML. Synthesis, characterization and crystal structure of (cis-P,P′-diphenyl-1,4-diphospha-cyclohexane)molybdenum(0)tetracarbonyl Inorganic Chemistry Communications. 13: 534-536. DOI: 10.1016/j.inoche.2010.01.030  0.8
2009 Heston SA, Noll BC, Helm ML. {Bis[2-(diphenyl-phosphino)eth-yl]phenyl-phosphine-κP,P',P''}chloridoplatinium(II) hexa-fluoridophosphate. Acta Crystallographica. Section E, Structure Reports Online. 65: m793. PMID 21582720 DOI: 10.1107/S1600536809022405  0.8
2009 Vorce PR, Miller SM, Helm ML. {Bis[2-(diphenyl-phosphino)eth-yl]phenyl-phosphine-κP,P',P''}chloridopalladium(II) hexa-fluoridophosphate. Acta Crystallographica. Section E, Structure Reports Online. 65: m792. PMID 21582719 DOI: 10.1107/S1600536809022417  0.8
2009 Sussman JE, Morey TS, Miller SM, Helm ML. Group 9 half-sandwich complexes containing the unique P,P′-diphenyl-1,4-diphospha-cyclohexane ligand: Synthesis, X-ray structure analyses and spectroscopic studies Journal of Organometallic Chemistry. 694: 3506-3510. DOI: 10.1016/j.jorganchem.2009.06.023  0.8
2008 Rooney CP, Wade JL, Hinkle AC, Stolley RM, Miller SM, Helm ML. Group 6 metal carbonyl complexes of a family of bulky phosphines: Spectroscopic and structural studies of chromium(0)-, molybdenum(0)- and tungsten(0)-pentacarbonylsilylphosphines Main Group Chemistry. 7: 155-165. DOI: 10.1080/10241220802376535  0.8
2007 Morey TS, Miller SM, Helm ML. Bis(cis-1,4-diphenyl-1,4-diphosphacyclo-hexane-k2 P,P′)platinum(II) bis-(tetra-fluorido-borate) Acta Crystallographica Section E: Structure Reports Online. 63: m1983. DOI: 10.1107/S1600536807030115  0.8
2007 Mason LJ, Moore AJ, Carr A, Helm ML. Lithium bis(2-phenylphosphidoethyl)phenylphosphine: A reactive phosphorus ntermediate Heteroatom Chemistry. 18: 675-678. DOI: 10.1002/hc.20351  0.8
2006 Helm ML, Hill LL, Lee JP, Van Derveer DG, Grant GJ. Cadmium-113 NMR studies on homoleptic complexes containing thioether ligands: the crystal structures of [Cd([12]aneS4)2](ClO4)2, [Cd([18]aneS4N2)](PF6)2 and [Cd([9]aneS3)2](PF6)2. Dalton Transactions (Cambridge, England : 2003). 3534-43. PMID 16855755 DOI: 10.1039/b601665k  0.8
2006 Mason LJ, Perrault EM, Miller SM, Helm ML. Group 10 metal complexes of a cyclic diphosphine: The crystal structures of bis(cis-P,P′-diphenyl-1,4-diphospha-cyclohexane)M(II) chloride, M = palladium, platinum Inorganic Chemistry Communications. 9: 946-948. DOI: 10.1016/j.inoche.2006.06.003  0.8
2005 Helm ML, Helton GP, Vanderveer DG, Grant GJ. Mercury-199 NMR studies of thiacrown and related macrocyclic complexes: the crystal structures of [Hg(18S6)](PF6)2 and [Hg(9N3)2](ClO4)2. Inorganic Chemistry. 44: 5696-705. PMID 16060620 DOI: 10.1021/ic050500z  0.8
2005 Denker MW, Helm ML. Synthesis and spectroscopic studies of group 6 metal carbonyl complexes with a novel cyclotriphosphazane ligand Synthesis and Reactivity in Inorganic, Metal-Organic and Nano-Metal Chemistry. 35: 227-231. DOI: 10.1081/SIM-200052654  0.8
2005 Grant GJ, Lee JP, Helm ML, VanDerveer DG, Pennington WT, Harris JL, Mehne LF, Klinger DW. Synthetic, structural, spectroscopic, and electrochemical studies of mixed sandwich Rh(III) and Ir(III) complexes involving Cp* and tridentate macrocycles Journal of Organometallic Chemistry. 690: 629-639. DOI: 10.1016/j.jorganchem.2004.10.010  0.8
2004 Grant GJ, Patel KN, Helm ML, Mehne LF, Klinger DW, Vanderveer DG. Heteroleptic platinum(II) complexes with crown thioethers and diimine ligands: The crystal structures of [Pt(9S3)(2,2′-bipy)](PF 6)2 and [Pt(9S3)(4,4-dimethyl-2,2′-bipy)](PF 6)2 · 2.5CH3NO2 Polyhedron. 23: 1361-1369. DOI: 10.1016/j.poly.2004.02.023  0.8
2003 Tarassoli A, Sedaghat T, Helm ML, Norman AD. Synthesis, spectroscopic characterization and x-ray studies of new complexes of organotin(IV) chlorides with n-alkylated 2-amino-1-cyclopentene-1-carbodithioic acids Journal of Coordination Chemistry. 56: 1179-1189. DOI: 10.1080/00958970310001628939  0.8
2003 Helm ML, Vanderveer DG, Grant GJ. Mercury complexes with thiacrowns: The crystal structure of bis(1,4,7-trithiacyclodecane)mercury(II) hexafluorophosphate Journal of Chemical Crystallography. 33: 625-630. DOI: 10.1023/A:1024954028516  0.8
2003 Helm ML, Loveday KD, Combs CM, Bentzen EL, VanDerveer DG, Rogers RD, Grant GJ. Heavy metal complexes of macrocyclic trithioethers Journal of Chemical Crystallography. 33: 447-455. DOI: 10.1023/A:1024294417454  0.8
2002 Helm ML, Hitchcock PB, Nixon JF, Nyulászi L, Szieberth D. Synthetic, structural and theoretical studies on the new 2,3-dihydro-1,2,4-thia-, selena- and tellura-diphospholes, P2EC2Bu2 t(H)Me, (E = S, Se, Te) and their [M(CO)5] complexes (M = Cr, Mo, W) Journal of Organometallic Chemistry. 659: 84-91. DOI: 10.1016/S0022-328X(02)01706-0  0.8
2002 Caliman V, Helm ML, Hitchcock PB, Jones C, Nixon JF. The first 2,3-dihydro-1 H-[1,2,4] triphosphole Journal of Organometallic Chemistry. 650: 198-201. DOI: 10.1016/S0022-328X(02)01227-5  0.8
2002 Helm ML, Combs CM, VanDerveer DG, Grant GJ. Homoleptic Group 12 metal complexes of macrocyclic thioethers: The crystal structures of bis(1,4,7-trithiacyclodecane)M(II) perchlorate: M(II)=zinc(II), cadmium(II), mercury(II) Inorganica Chimica Acta. 338: 182-188. DOI: 10.1016/S0020-1693(02)01016-2  0.8
1999 Helm ML, Katz SA, Imiolczyk TW, Hands RM, Norman AD. Synthesis, characterization, and solution properties of skeletally stabilized triphosphazanes Inorganic Chemistry. 38: 3167-3172.  0.8
1998 Helm ML, Noll BC, Norman AD. New Cleft-Containing Heterosubstituted Cyclophosphazanes. Inorganic Chemistry. 37: 4478-4479. PMID 11670587  0.8
1998 Helm ML, Noll BC, Norman AD. New Cleft-Containing Heterosubstituted Cyclophosphazanes Inorganic Chemistry. 37: 4478-4479.  0.8
1997 Hands RM, Helm M, Noll B, Norman AD. Skeletal stabilization: A basis for new classes of cyclophosphazanes Phosphorus, Sulfur and Silicon and Related Elements. 124: 285-293.  0.8
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