Zobrazeno 1 - 10
of 23
pro vyhledávání: '"Donald M. Friedrich"'
Autor:
Menno Dreischor, Marc K. von Gunten, Chang Hsiung, Eric N.M. van Sprang, Nada A. O'Brien, Donald M. Friedrich, Henk-Jan Ramaker, Christopher G. Pederson
Publikováno v:
SPIE Proceedings.
While significant progress has been made towards the miniaturization of Raman, mid-infrared (IR), and near-infrared (NIR) spectrometers for homeland security and law enforcement applications, there remains continued interest in pushing the technology
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::69d685c6c3a3cff87e57fc7dbd49cc74
https://doi.org/10.1117/12.2050019
https://doi.org/10.1117/12.2050019
Autor:
Marc K. von Gunten, Nada A. O'Brien, Eric P. Williamson, Donald M. Friedrich, Charles A. Hulse, Christopher G. Pederson
Publikováno v:
SPIE Proceedings.
Point-of-use chemical analysis holds tremendous promise for a number of industries, including agriculture, recycling, pharmaceuticals and homeland security. Near infrared (NIR) spectroscopy is an excellent candidate for these applications, with minim
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::25f5be293b4be8039408ad32c2cbe750
https://doi.org/10.1117/12.2040669
https://doi.org/10.1117/12.2040669
Publikováno v:
The Journal of Physical Chemistry A. 105:6020-6023
The origin of the red-shifted fluorescence emission spectra observed for commercial zone-refined phenanthrene (purity 99.5+%) in concentrated cyclohexane solution and as sorbates on porous silica at high loading levels was studied by absorption and f
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9e7d5d3bf78d8f8858ffb116b101cddc
https://doi.org/10.1021/jp003983v
https://doi.org/10.1021/jp003983v
Autor:
Staci L. Hemmer, Alan G. Joly, Calvin C. Ainsworth, Zheming Wang, Donald M. Friedrich, Michael R. Beversluis
Publikováno v:
The Journal of Physical Chemistry A. 105:942-950
The tautomerization of salicylate anion in the presence of Al(III) in ethanol was studied by UV−visible absorption spectroscopy and fluorescence spectroscopy, anisotropy, and lifetime measurements from 100 to 298 K. Complexation with Al(III) causes
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::77a35db3b6fbfac4f37329d1634ae248
https://doi.org/10.1021/jp002844a
https://doi.org/10.1021/jp002844a
Publikováno v:
Geochimica et Cosmochimica Acta. 64:1159-1172
The reaction kinetics of salicylate with Al(III) in aqueous solution and at the colloidal alumina–water interface was studied by stopped-flow laser fluorescence spectroscopy. Temporal evolution of the fluorescence spectra suggests that formation of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::98ff173d49618255136347a110b0aaba
https://doi.org/10.1016/s0016-7037(99)00360-9
https://doi.org/10.1016/s0016-7037(99)00360-9
Publikováno v:
Journal of Colloid and Interface Science. 218:260-264
Time-resolved fluorescence anisotropy decays of solutions of Triton X-114 (TX-114) with various amounts of sodium dodecyl sulfate (SDS) were measured using the emission both from the surfactant itself and from added perylene. In the former case, the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::326fd05a635903a2911bb1b9052e82ff
https://doi.org/10.1006/jcis.1999.6414
https://doi.org/10.1006/jcis.1999.6414
Publikováno v:
Geochimica et Cosmochimica Acta. 62:595-612
Speciation of salicylate anions (o-hydroxybenzoate) adsorbed on aqueous colloidal alumina (δ-Al2O3) was determined by polarized fluorescence excitation spectroscopy. Adsorption isotherms and pH and ionic strength edges suggest the existence of both
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::897570f6c2b2bac9a553256cb01e0cdc
https://doi.org/10.1016/s0016-7037(97)00375-x
https://doi.org/10.1016/s0016-7037(97)00375-x
Publikováno v:
Chemical Physics Letters. 258:80-86
Raman spectra in resonance with the L a state of benzene derivatives exhibit activity in both the fundamental and two-quantum overtones of modes that are of e 2g symmetry in benzene. The Raman spectra can be used to test proposals of Petruska that re
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c419dbb702e2f940efdef94c0336c1db
https://doi.org/10.1016/0009-2614(96)00644-6
https://doi.org/10.1016/0009-2614(96)00644-6
Publikováno v:
The Journal of Physical Chemistry. 99:6347-6355
Raman excitation and absorption profiles were obtained for the 1:1 electron donor-acceptor complex of hexamethylbenzene with tetracyanoethylene in dichloromethane solution. The absorption and Raman profiles were analyzed using the time-dependent theo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e3b648ac75bdee82f92a3370fa064c5b
https://doi.org/10.1021/j100017a014
https://doi.org/10.1021/j100017a014
Autor:
Heinz W. Siesler, Charles A. Hulse, Marc K. von Gunten, Nada A. O'Brien, Frank Pfeifer, Donald M. Friedrich, Fred J. Van Milligen
Publikováno v:
SPIE Proceedings.
While substantial progress has been made recently towards the miniaturization of Raman, mid-infrared (IR), and nearinfrared (NIR) spectrometers, there remains continued interest from end-users and product developers in pushing the technology envelope
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0ce1e466ee5469e5bb44838a470ebb4c
https://doi.org/10.1117/12.917983
https://doi.org/10.1117/12.917983