Zobrazeno 1 - 10
of 47
pro vyhledávání: '"Mark P. Niemczyk"'
Autor:
Michael R. Wasielewski, Wighard J. H. Jäger, Mark P. Niemczyk, Lin X. Chen, David J. Gosztola
Publikováno v:
Synthetic Metals. 116:229-234
Effects of two types of chemical modifications on photoconducting polymers consisting of polyphenylene vinylene (PPV) derivatives are studied by static and ultrafast transient optical spectroscopy as well as semi-empirical ZINDO calculations. The fir
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a7aaa41479ebef01616e51b453c0ce46
https://doi.org/10.1016/s0379-6779(00)00458-6
https://doi.org/10.1016/s0379-6779(00)00458-6
Publikováno v:
The Journal of Physical Chemistry A. 104:6545-6551
The radical anions of aromatic diimides have been implicated recently in a wide variety of photochemical electron transfer reactions. Photoexcitation of these radical anions produces powerfully reducing species. Yet, the properties of the π* excited
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::90707f26eba864aaf7eff6ed5fa93c8c
https://doi.org/10.1021/jp000706f
https://doi.org/10.1021/jp000706f
Autor:
Michael R. Wasielewski, Wighard J. H. Jäger, Lin X. Chen, Mark P. Niemczyk, David J. Gosztola
Publikováno v:
The Journal of Physical Chemistry B. 104:1950-1960
The effects of metal ion chelation to the 2,2‘-bipyridine (bpy) groups on the photophysics and exciton dynamics of two conjugated polymers 1 and 2 in solution are investigated. The structures of polymers 1 and 2 have 2,2‘-bipyridyl-5-vinylene uni
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::009c293bdb6a0ed0898a962d41389e9b
https://doi.org/10.1021/jp993365i
https://doi.org/10.1021/jp993365i
Publikováno v:
The Journal of Physical Chemistry A. 103:4341-4351
The effect of π-conjugation attenuation on the photophysics and exciton dynamics of two conjugated polymers 1 and 2 are examined in solution. The structures of polymers 1 and 2 have 2,2‘-bipyridyl-5-vinylene units that alternate with one and three
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a0a00d45c7d54cb10bbaa71e56bcea04
https://doi.org/10.1021/jp990248e
https://doi.org/10.1021/jp990248e
Publikováno v:
Chemistry of Materials. 11:1409-1412
New organic materials that exhibit photorefractive effects are of wide interest for potential optical signal processing applications. The authors report on a photorefractive nematic liquid crystal composite containing the conjugated polymer poly(2,5-
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::be5e3a670a36d26bb4d1ef30952f35b1
https://doi.org/10.1021/cm9901008
https://doi.org/10.1021/cm9901008
Publikováno v:
Journal of the American Chemical Society. 118:81-88
We report ultrafast transient absorption studies of photoinduced electron transfer in the triad molecule zinc methyl 131-desoxopyropheophorbide a−pyromellitimide−1,8:4,5-naphthalenediimide (ZC−PI−NI) in solution. The absorption spectra of the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2b5d50ca706a74cc0a7db6e333b82560
https://doi.org/10.1021/ja953159y
https://doi.org/10.1021/ja953159y
Publikováno v:
The Journal of Physical Chemistry. 99:8918-8926
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d6a4fe56e9561a15ad5141beeb4a5412
https://doi.org/10.1021/j100021a069
https://doi.org/10.1021/j100021a069
Publikováno v:
Solar Energy Materials and Solar Cells. 38:127-134
Photosynthetic reaction center models consisting of zinc 9-desoxo-pyrochlorophyllide a primary electron donors, ZC, that are directly bonded at their 3-position to the 5-position of a 2,8,12,18-tetraethyl-3,7,13,17-tetramethylporphyrin, ZP, which is
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4d8c3d02a18928701ea7138bf1015cde
https://doi.org/10.1016/0927-0248(94)00221-5
https://doi.org/10.1016/0927-0248(94)00221-5
Autor:
Michael R. Wasielewski, David W. Minsek, Gary P. Wiederrecht, Walter A. Svec, George L. Gaines, Douglas G. Johnson, Mark P. Niemczyk
Publikováno v:
Journal of the American Chemical Society. 115:5692-5701
The photochemistry of four chlorophyll-porphyrin-naphthoquinone molecules possessing both fixed distances and orientations between the three components is described. These molecules consist of a methyl pyropheophorbide a or pyrochlorophyllide a that
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5c10ad137bf76cfa67040454a9743964
https://doi.org/10.1021/ja00066a039
https://doi.org/10.1021/ja00066a039
Autor:
Mark P. Niemczyk, Michael R. Wasielewski, David J. Gosztola, George L. Gaines, Michael P. O'Neil, Walter A. Svec
Publikováno v:
ChemInform. 24
An electron donor-acceptor-donor molecule consisting of two porphyrin donors rigidly attached to the two-electron acceptor N,N'-diphenyl-3,4,9,10-perylenebis(dicarboximide) acts as a light intensity-dependent molecular switch on a picosecond time sca
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cee6e02e3b3b42019670010230af9565
https://doi.org/10.1002/chin.199306257
https://doi.org/10.1002/chin.199306257