Výsledky vyhledávání - "Darla K. Graff"

Ground and excited state structural isomers in trans-[Ru(bpy)2(L)2](PF6)2

Autor: Jon R. Schoonover, David W. Thompson, Cavan N. Fleming, Thomas J. Meyer, Darla K. Graff

Publikováno v: Journal of Photochemistry and Photobiology A: Chemistry. 137:131-134

Spectroscopic evidence is presented for different structural isomers of trans -[Ru(bpy) 2 (L 1 )(L 1 )] 2+ (L 1 or L 2 =4-Etpy ( 1 ), py-PTZ) in which bpy is planar or nonplanar compared to cis -[Ru(bpy) 2 (py) 2 ] 2+ or [Ru(bpy) 3 ] 2+ in which bpy

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::409626aa6ac384fdbdc994325db89670
https://doi.org/10.1016/s1010-6030(00)00347-6

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High Spatial Resolution for IR Imaging Using an IR Diode Laser

Autor: Darla K. Graff, Jon R. Schoonover, James A. Bailey, R. Brian Dyer

Publikováno v: Applied Spectroscopy. 54:159-163

By coupling an infrared diode laser to a conventional infrared microscope, one achieves resolution approaching the diffraction limit while enabling rapid data collection. This technique is demonstrated with the use of a layered polymer sample that ha

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::f9aa35e0e79808ffa28a6bd0fef019ce
https://doi.org/10.1366/0003702001949122

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Static and Dynamic FT-IR Linear Dichroism Studies of Plasticization Effects in a Polyurethane Elastomer

Autor: Darla K. Graff, Jon R. Schoonover, Richard A. Palmer, Haochuan Wang

Publikováno v: Macromolecules. 32:7147-7155

By combining FTIR data of plasticized Estane (a polyester polyurethane copolymer) subjected to mechanical deformation with spectral differences as a function of added plasticizer, insight into the physical role of plasticization is gained. For Estane

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::a2fa78a0a0cc296d80f720a384ff3f58
https://doi.org/10.1021/ma990495g

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Static and Dynamic Infrared Linear Dichroic Study of a Polyester/Polyurethane Copolymer Using Step-Scan FT-IR and a Photoelastic Modulator

Autor: Haochuan Wang, Jon R. Schoonover, Darla K. Graff, Richard A. Palmer

Publikováno v: Applied Spectroscopy. 53:687-696

Dynamic infrared linear dichroism (DIRLD) measurements of films of a thermo-plastic polyester/polyurethane random copolymer (Estane 5703, B. F. Goodrich) are reported. Step-scan Fourier transform infrared (FT-IR) is used for dynamic measurements, and

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b366071ee4a1f8f8dc932708f12eb035
https://doi.org/10.1366/0003702991947126

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Energy Transfer in the Inverted Region: Calculation of Relative Rate Constants by Emission Spectral Fitting

Autor: Wayne E. Jones, Darla K. Graff, W. Douglas Bates, Zakir Murtaza, Laura A. Worl, Arden P. Zipp, Thomas J. Meyer

Publikováno v: The Journal of Physical Chemistry. 98:10504-10513

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::c693c227b591b5606cca72b894b9f008
https://doi.org/10.1021/j100092a020

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Calculation of Electron-Transfer Rate Constants in the Inverted Region from Absorption Spectra

Autor: Pinyung Chen, Thomas J. Meyer, Darla K. Graff, Sandra L. Mecklenburg, Néstor E. Katz

Publikováno v: The Journal of Physical Chemistry. 98:8959-8961

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::0261550cef9b1b0226821ec870bd26f8
https://doi.org/10.1021/j100087a024

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Study of estane polyester/polyurethane block copolymer by use of 2D-IR and DMA-FTIR: Understanding of polymer rheology from molecular dynamics

Autor: Jon R. Schoonover, Haochuan Wang, Richard A. Palmer, Darla K. Graff

Publikováno v: AIP Conference Proceedings.

In this paper, we demonstrate the use of the combination of dynamic mechanical analysis (DMA) and Fourier transform Infrared (FTIR) in simultaneous mechanical and dynamic IR spectral measurement. The DMA is performed on polymer films in the tensile g

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::6a3f82204d516bad51a9752a85dba6b7
https://doi.org/10.1063/1.1302845

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Energy transfer in the 'inverted region'

Autor: Arden P. Zipp, W. Doug Bates, Laura A. Worl, Thomas J. Meyer, Darla K. Graff, Zakir Murtaza, Wayne E. Jones

Publikováno v: Journal of the American Chemical Society. 113:5113-5114

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::af6d2c6081e043241f32c6dfb4a7687b
https://doi.org/10.1021/ja00013a085

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Fourier and Hadamard: Transforms in Spectroscopy

Autor: Darla K. Graff

Publikováno v: Journal of Chemical Education. 72:304

Discussion of mathematical transformations, focussing on the Hadamard transform, with comparisons to Fourier transform.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::24c4ad1007f681efd6ae7d942c79c07e
https://doi.org/10.1021/ed072p304

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Intramolecular electron transfer in the inverted region

Autor: Pingyun Chen, Thomas J. Meyer, Darla K. Graff, Rich Duesing

Publikováno v: Journal of the American Chemical Society. 111:8305-8306

In 1960 Marcus predicted that rate constants for electron transfer should decrease with -{Delta}G in the inverted region. In the inverted region, -{Delta}G > {lambda}, where {lambda} is the reorganization energy and {Delta}G the free energy loss asso

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9948389517fd210e188d6101ef4a572f
https://doi.org/10.1021/ja00203a056

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