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Michael Sponsler

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Papers by Michael Sponsler

Preparation of Ordered Polyacetylene by Solid-State Polymerization in Nanoscale Confinement

Chemistry of Materials, Feb 14, 2020

[<i>closo</i>-B<sub>10</sub>H<sub>8</sub>-1,10-(CN)<sub>2</sub>]<sup>2–</sup> as a Conduit of Electronic Effects: Comparative Studies of Fe···Fe Communication in [{(<i>η</i><sup><i>5</i></sup>-Cp)(dppe)Fe}<sub>2</sub>{μ<sub><i>2</i></sub>-(NC-X-CN)}]<sup><i>n</i>+</sup> (<i>n</i> = 0, 2)

Organometallics, Jul 9, 2021

Intermetal Coupling in [(η<sup>5</sup>-C<sub>5</sub>R<sub>5</sub>)Fe(dppe)]<sub>2</sub>(μ-CHCHCHCH) and in Their Dicationic and Monocationic Mixed-Valence Forms

Organometallics, Jul 18, 2003

Synthesis of E,E,E-1,6-diiodo-1,3,5-hexatriene and inclusion into urea crystals for polyacetylene formation

Microwave spectrum and structure of bicyclo[1.1.1]pentanone and comparison with several theoretical structures

The Journal of Physical Chemistry, Nov 1, 1986

Page 1. 6412 J. Phys. Chem. 1986, 90, 6412-6415 ARTICLES Microwave Spectrum and Structure of Bicy... more

Stabilization of (Trialkylphosphine)ruthenium Alkylidene Metathesis Catalysts using Phosphine Exchange

Organometallics, Apr 4, 2007

ABSTRACT The second-generation Grubbs analogues (H2IMes)RuCl2(CHPh)(PR3) (R = Me, Bu) were essent... more ABSTRACT The second-generation Grubbs analogues (H2IMes)RuCl2(CHPh)(PR3) (R = Me, Bu) were essentially metathesis-inactive and air-stable at room temperature but exhibited first-order metathesis with ethyl vinyl ether at elevated temperature. The PMe3 complex underwent second-order ligand exchange with PBu3, indicating different coordination mechanisms (dissociative vs associative) in the two reactions.

Matrix-isolation decay kinetics of triplet cyclobutanediyls. Observation of both Arrhenius behavior and heavy-atom tunneling in carbon-carbon bond-forming reactions

Journal of the American Chemical Society, Mar 1, 1989

Trithiocarbonate-mediated free-radical photopolymerization: improved uniformity in hologram recording

Applied optics, Sep 20, 2006

A holographic material based on a photopolymerizable nematic acrylate was improved by the additio... more A holographic material based on a photopolymerizable nematic acrylate was improved by the addition of the trithiocarbonate, EtO2CCH2SC(S)SCH2CO2Et, increasing uniformity and reproducibility in the formation of electrically switchable holographic gratings. Diffraction efficiencies as high as 34%, the thin-grating theoretical maximum, were achieved at large (10-14 microm) grating spacings. Improved diffraction efficiency was seen over a range of grating spacings (0.35-10 microm). The exposure window for grating formation was increased by an order of magnitude, resulting in much improved reproducibility.

Bicyclo[1.1.1]pentanone. Synthesis, thermal chemistry, and photochemistry

Journal of Organic Chemistry, Dec 1, 1984

Dynamic Holographic Gratings Recorded by Photopolymerization of Liquid Crystalline Monomers

Journal of the American Chemical Society, Aug 1, 1994

Mixed-Valence Diiron Complexes with Butadienediyl Bridges

Journal of the American Chemical Society, Mar 1, 1994

Cyclobutanediyls: a new class of localized biradicals. Synthesis and EPR spectroscopy

Journal of the American Chemical Society, Mar 1, 1988

ChemInform Abstract: Matrix-Isolation Decay Kinetics of Triplet Cyclobutanediyls. Observation of Both Arrhenius Behavior and Heavy-Atom Tunneling in C-C Bond-Forming Reactions

ChemInform, Jun 27, 1989

Switchable liquid crystalline photopolymer media for holography

Journal of the American Chemical Society, Feb 1, 1992

Ruthenium Alkylidenes: Fast Initiators for Olefin Metathesis

Organometallics, Mar 18, 2005

ChemInform Abstract: BICYCLO(1.1.1)PENTANONE. SYNTHESIS, THERMAL CHEMISTRY, AND PHOTOCHEMISTRY

Chemischer Informationsdienst, May 14, 1985

A Butadienediyl-Bridged Diiron Compound in Three Oxidation Levels

Organometallics, Nov 1, 1994

Metal Centers Connected by Conjugated Bridges. A Theoretical Evaluation of Delocalization Effects

Organometallics, Apr 1, 1995

... At -78 &quot;C, this wave becomes quasi-reversible; an EPR spectrum for l+ has also been ... more

$Research paper thumbnail of Refractive index and orientation profiles of holographic gratings written in liquid crystalline monomers$

Refractive index and orientation profiles of holographic gratings written in liquid crystalline monomers

The Journal of Physical Chemistry, Jun 1, 1995

... Michael B. Sponsler Department of Chemistry and W. M. Keck Center for Molecular Electronics, ... more

Liquid Crystals as Holographic Recording Media

Advances in chemistry series, May 5, 1994

Preparation of Ordered Polyacetylene by Solid-State Polymerization in Nanoscale Confinement

Chemistry of Materials, Feb 14, 2020

[<i>closo</i>-B<sub>10</sub>H<sub>8</sub>-1,10-(CN)<sub>2</sub>]<sup>2–</sup> as a Conduit of Electronic Effects: Comparative Studies of Fe···Fe Communication in [{(<i>η</i><sup><i>5</i></sup>-Cp)(dppe)Fe}<sub>2</sub>{μ<sub><i>2</i></sub>-(NC-X-CN)}]<sup><i>n</i>+</sup> (<i>n</i> = 0, 2)

Organometallics, Jul 9, 2021

Intermetal Coupling in [(η<sup>5</sup>-C<sub>5</sub>R<sub>5</sub>)Fe(dppe)]<sub>2</sub>(μ-CHCHCHCH) and in Their Dicationic and Monocationic Mixed-Valence Forms

Organometallics, Jul 18, 2003

Synthesis of E,E,E-1,6-diiodo-1,3,5-hexatriene and inclusion into urea crystals for polyacetylene formation

Microwave spectrum and structure of bicyclo[1.1.1]pentanone and comparison with several theoretical structures

The Journal of Physical Chemistry, Nov 1, 1986

Page 1. 6412 J. Phys. Chem. 1986, 90, 6412-6415 ARTICLES Microwave Spectrum and Structure of Bicy... more

Stabilization of (Trialkylphosphine)ruthenium Alkylidene Metathesis Catalysts using Phosphine Exchange

Organometallics, Apr 4, 2007

ABSTRACT The second-generation Grubbs analogues (H2IMes)RuCl2(CHPh)(PR3) (R = Me, Bu) were essent... more ABSTRACT The second-generation Grubbs analogues (H2IMes)RuCl2(CHPh)(PR3) (R = Me, Bu) were essentially metathesis-inactive and air-stable at room temperature but exhibited first-order metathesis with ethyl vinyl ether at elevated temperature. The PMe3 complex underwent second-order ligand exchange with PBu3, indicating different coordination mechanisms (dissociative vs associative) in the two reactions.

Matrix-isolation decay kinetics of triplet cyclobutanediyls. Observation of both Arrhenius behavior and heavy-atom tunneling in carbon-carbon bond-forming reactions

Journal of the American Chemical Society, Mar 1, 1989

Trithiocarbonate-mediated free-radical photopolymerization: improved uniformity in hologram recording

Applied optics, Sep 20, 2006

A holographic material based on a photopolymerizable nematic acrylate was improved by the additio... more A holographic material based on a photopolymerizable nematic acrylate was improved by the addition of the trithiocarbonate, EtO2CCH2SC(S)SCH2CO2Et, increasing uniformity and reproducibility in the formation of electrically switchable holographic gratings. Diffraction efficiencies as high as 34%, the thin-grating theoretical maximum, were achieved at large (10-14 microm) grating spacings. Improved diffraction efficiency was seen over a range of grating spacings (0.35-10 microm). The exposure window for grating formation was increased by an order of magnitude, resulting in much improved reproducibility.

Bicyclo[1.1.1]pentanone. Synthesis, thermal chemistry, and photochemistry

Journal of Organic Chemistry, Dec 1, 1984

Dynamic Holographic Gratings Recorded by Photopolymerization of Liquid Crystalline Monomers

Journal of the American Chemical Society, Aug 1, 1994

Mixed-Valence Diiron Complexes with Butadienediyl Bridges

Journal of the American Chemical Society, Mar 1, 1994

Cyclobutanediyls: a new class of localized biradicals. Synthesis and EPR spectroscopy

Journal of the American Chemical Society, Mar 1, 1988

ChemInform Abstract: Matrix-Isolation Decay Kinetics of Triplet Cyclobutanediyls. Observation of Both Arrhenius Behavior and Heavy-Atom Tunneling in C-C Bond-Forming Reactions

ChemInform, Jun 27, 1989

Switchable liquid crystalline photopolymer media for holography

Journal of the American Chemical Society, Feb 1, 1992

Ruthenium Alkylidenes: Fast Initiators for Olefin Metathesis

Organometallics, Mar 18, 2005

ChemInform Abstract: BICYCLO(1.1.1)PENTANONE. SYNTHESIS, THERMAL CHEMISTRY, AND PHOTOCHEMISTRY

Chemischer Informationsdienst, May 14, 1985

A Butadienediyl-Bridged Diiron Compound in Three Oxidation Levels

Organometallics, Nov 1, 1994

Metal Centers Connected by Conjugated Bridges. A Theoretical Evaluation of Delocalization Effects

Organometallics, Apr 1, 1995

... At -78 &quot;C, this wave becomes quasi-reversible; an EPR spectrum for l+ has also been ... more

$Research paper thumbnail of Refractive index and orientation profiles of holographic gratings written in liquid crystalline monomers$

Refractive index and orientation profiles of holographic gratings written in liquid crystalline monomers

The Journal of Physical Chemistry, Jun 1, 1995

... Michael B. Sponsler Department of Chemistry and W. M. Keck Center for Molecular Electronics, ... more

Liquid Crystals as Holographic Recording Media

Advances in chemistry series, May 5, 1994