Zobrazeno 1 - 10
of 354
pro vyhledávání: '"Stephen F. Nelsen"'
Autor:
Yen-Ting Chen, Stephen F. Nelsen, Jeffrey I. Zink, Matthew D. Kiesz, Ryan M. Hoekstra, João P. Telo
Publikováno v:
The Journal of Physical Chemistry A. 118:11490-11498
The electronic absorption spectrum of 9,9-dimethyl-2,7-dinitrofluorene radical anion in HMPA displays both a NIR intervalence charge transfer and a visible excited state mixed valence transition. These transitions contain a similar vibronic progressi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::673e9d56dad4e28d34cc581ef8df7dd9
https://doi.org/10.1021/jp505299p
https://doi.org/10.1021/jp505299p
Autor:
Frank Weinhold, Clauss Allen David, Mohamed Ayoub, John W. Moore, Stephen F. Nelsen, Clark R. Landis
Publikováno v:
Chem. Educ. Res. Pract.. 15:417-434
We describe the logical flaws, experimental contradictions, and unfortunate educational repercussions of common student misconceptions regarding the shapes and properties of lone pairs, inspired by overemphasis on “valence shell electron pair repul
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::452ff3033172616e199d7ab819fcc9cd
https://doi.org/10.1039/c4rp00057a
https://doi.org/10.1039/c4rp00057a
Publikováno v:
The Journal of Organic Chemistry. 78:11373-11381
We report synthesis and investigation of doubly trimethylene-bridged tetrabenzyl-p-phenylenediamine 1(Bz) in its singly and doubly charged redox states. The singly oxidized monoradical cation, which is a mixed-valence (MV) system with directly intera
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::13b778d91142c009b54e76e092e79163
https://doi.org/10.1021/jo401921f
https://doi.org/10.1021/jo401921f
Autor:
Jeffrey I. Zink, Keiji Okada, Stephen F. Nelsen, Ryan M. Hoekstra, Michael N. Weaver, Marcelle Dibrelle
Publikováno v:
Journal of Physical Organic Chemistry. 25:578-585
The optical and resonance Raman spectra of the 2,2′: 6′,2″:6″,6-trioxytriphenyl-amine cation are measured and interpreted. This molecule contains two simultaneous types of coupling between three chromophores and two types of bridging atoms. T
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1074e86021264b8b9a0796d604c24fac
https://doi.org/10.1002/poc.2920
https://doi.org/10.1002/poc.2920
Publikováno v:
The Journal of Physical Chemistry A. 115:3016-3021
Optical and electron paramagnetic resonance spectroscopies were used to study the radical anions of several m-dinitrobenzenes and p-dinitrobenzenes with substituents on ortho positions relative to the nitro groups. 1,4-Dinitrobenzene, 1,4-dimethyl-2,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::edf71ddbc5c6f64e15b1cde847466218
https://doi.org/10.1021/jp200829r
https://doi.org/10.1021/jp200829r
Publikováno v:
Journal of the American Chemical Society. 132:6176-6182
X-ray crystallographic structures are reported for 1(Me)(2+)(SbCl(6)(-))(2) x 2 CH(3)CN, 2(Et)(2+)(SbF(6)(-))(2) x 2 CH(3)CN x 2 CH(2)Cl(2), and 1(iPr)(2+)(SbF(6)(-))(2), which also contained unresolved solvent and is in a completely different confor
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::98eb5bb7b0fe81707bbbed24a5c96bcb
https://doi.org/10.1021/ja100322k
https://doi.org/10.1021/ja100322k
Publikováno v:
Journal of Physical Organic Chemistry. 22:522-526
The optical absorption spectrum and resonance Raman enhancement of the lowest energy absorption band of K+7,7,8,8-tetracyanoquinodimethane− (TCNQ) are reported and examined in the mixed valence (MV) framework. The absorption spectrum is assigned, i
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b9b96f715d05779ab66370be88639cc3
https://doi.org/10.1002/poc.1518
https://doi.org/10.1002/poc.1518
Autor:
Jenny V. Lockard, Michael N. Weaver, Stephen F. Nelsen, Xianghuai Wang, Yun Luo, Edward A. Plummer, Jeffrey I. Zink, Guadalupe Valverde-Aguilar
Publikováno v:
The Journal of Physical Chemistry A. 112:7332-7341
Absorption spectra for 2,3-diaryl-2,3-diazabicyclo[2.2.2]octane radical cations (2(X)(*+)) and for their monoaryl analogues 2-tert-butyl-3-aryl-2,3-diazabicyclo[2.2.2]octane radical cations (1(X)(*+)) having para chloro, bromo, iodo, cyano, phenyl, a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e46ba2d7f0ef58a123c2250f929beeeb
https://doi.org/10.1021/jp7120005
https://doi.org/10.1021/jp7120005
Publikováno v:
The Journal of Physical Chemistry A. 111:10993-10997
Optical spectra in dimethylformamide are reported for the radical anions of benzoquinone, its tetramethyl and tetrachloro analogues, and tetra-ortho-alkyl derivatives of biphenyl, stilbene, terphenyl, quadriphenyl, and 1,4-bis(2-phenylethenyl)benzene
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::49b0a7086e2cf0b3c36c7dd889c7c4f5
https://doi.org/10.1021/jp075788n
https://doi.org/10.1021/jp075788n
Autor:
Xianghuai Wang, Stephen F. Nelsen, Guadalupe Valverde-Aguilar, Jeffrey I. Zink, Michael N. Weaver
Publikováno v:
The Journal of Physical Chemistry A. 111:5441-5447
Resonance Raman and absorption spectra of 9,10-bis(2-tert-butyl-2,3-diazabicyclo[2.2.2]oct-3-yl)-anthracene (2) are measured and analyzed. The contribution of the individual vibrational normal modes to the reorganization energy is investigated. Excit
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::802ec2d3b646c88e07d3a492e26a2174
https://doi.org/10.1021/jp071203d
https://doi.org/10.1021/jp071203d