Zobrazeno 1 - 10
of 45
pro vyhledávání: '"T. C. Sandreczki"'
Publikováno v:
Tetrahedron. 69:1105-1111
A series of oligomers, the hetero-coupled mono-terminated di-tert-butyl-substituted phenylene ethynylene dimer, trimer, tetramer, and pentamer have been successfully synthesized in a stepwise process and characterized. Their electronic properties hav
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6f7e763d911dfdc50c4b8ac4b15600e2
https://doi.org/10.1016/j.tet.2012.11.063
https://doi.org/10.1016/j.tet.2012.11.063
Publikováno v:
Tetrahedron Letters. 54:1711-1713
A series of highly fluorescent p -phenylene–ethynylene π-conjugated oligomers (trimers and tetramers) with different chromophore substituents have been synthesized stepwise under oxygen-free Sonogashira conditions. The emission wavelengths range f
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b122a9da34b89b6bedbc704160e2696f
https://doi.org/10.1016/j.tetlet.2013.01.076
https://doi.org/10.1016/j.tetlet.2013.01.076
Autor:
Tinh Nguyen, Yong Li, Yan Ching Jean, Hongmin Chen, R. Zhang, X. Gu, T. C. Sandreczki, Junjie Zhang
Publikováno v:
Journal of Polymer Science Part B: Polymer Physics. 42:2441-2459
The photodegradation of an amine-cured epoxy coating after exposure to accelerated UV-340 and UV-313 irradiation was investigated with an atomic-level technique, positron annihilation spectroscopy (PAS), which detected and characterized the free volu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4d1e7dd4404a5c8e9446c59803eff59c
https://doi.org/10.1002/polb.20135
https://doi.org/10.1002/polb.20135
Autor:
Ying Li, Junjie Zhang, Y.C. Wu, Peter E. Mallon, Toshiyuki Ohdaira, Ryoichi Suzuki, T. Nguyen, R. Zhang, X. Gu, T. C. Sandreczki, Hongmin Chen, Yan Ching Jean
Publikováno v:
Radiation Physics and Chemistry. 68:395-402
In complicated coating systems, positrons have shown sensitivity in detecting the early stage of deterioration due to weathering, specially, in probing a specific location or depth of coatings from the surface through interfaces and the bulk. Existin
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8f65bb10c42e2141c7daeb2c006c6e7f
https://doi.org/10.1016/s0969-806x(03)00190-7
https://doi.org/10.1016/s0969-806x(03)00190-7
Autor:
T. C. Sandreczki, J. R. Richardson, Yong Li, Y.C. Wu, Y.Y. Huang, Q. Peng, R. Zhang, Junjie Zhang, Hongmin Chen, Yan Ching Jean
Publikováno v:
Radiation Physics and Chemistry. 68:593-598
A series of commercial coatings were prepared according to the industrial specifications and were exposed to Florida natural weathering and controlled UVA irradiation. The Doppler broadening energy spectra (DBES) of positron annihilation were measure
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4fc1948c592247ea3c22edcf13c08cb3
https://doi.org/10.1016/s0969-806x(03)00238-x
https://doi.org/10.1016/s0969-806x(03)00238-x
Publikováno v:
Radiation Physics and Chemistry. 68:481-484
Polystyrene samples, incorporated with halogen elements (F, Cl, Br, I) on the para -position of the benzene ring, were studied using positron annihilation lifetime spectroscopy. It was found that the free-volume hole size is significantly affected by
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::37b05bb9ef3fe81046e313958f5ff7f2
https://doi.org/10.1016/s0969-806x(03)00212-3
https://doi.org/10.1016/s0969-806x(03)00212-3
Autor:
Toshiyuki Ohdaira, Peter E. Mallon, Yong Li, Hongmin Chen, Y.C. Wu, R. Zhang, R. Suzuki, Yan Ching Jean, T. C. Sandreczki
Publikováno v:
Applied Surface Science. 194:176-181
The durability of three commercially available polymeric coatings are investigated using slow positron beam techniques to monitor changes in sub nanometer defects during the degradation process. Doppler broadening energy spectra (DBES) measurements w
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9bef02f18f7d1e63edd80f815c87fb0e
https://doi.org/10.1016/s0169-4332(02)00120-4
https://doi.org/10.1016/s0169-4332(02)00120-4
Autor:
Y.Y. Huang, Peter E. Mallon, J. R. Richardson, Hongmin Chen, Toshiyuki Ohdaira, Yong Li, R. Suzuki, Y.C. Wu, R. Zhang, Q. Peng, Junjie Zhang, Yan Ching Jean, T. C. Sandreczki
Publikováno v:
Applied Surface Science. 194:168-175
The mechanical durability of seven commercially polymeric coatings is investigated using slow positron beam techniques to monitor changes in sub-nanometer defects during the process of cyclic loading. Doppler broadened energy spectra and positron ann
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::07174f6dcc1303473dd7a9f8e8873519
https://doi.org/10.1016/s0169-4332(02)00119-8
https://doi.org/10.1016/s0169-4332(02)00119-8
Autor:
Junjie Zhang, Peter E. Mallon, C.-M. Huang, T. C. Sandreczki, Y.C. Wu, R. Zhang, Hongmin Chen, Yong Li, Yan Ching Jean
Publikováno v:
Progress in Organic Coatings. 42:244-252
Photodegradation of a polyurethane coating by Xe arc-lamp irradiation as a function of time is studied by positron annihilation spectroscopy. Doppler broadening energy spectra (DBES) of annihilation irradiation is measured as a function of incident p
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a01c100ce866e2e00b8959dcefbc941c
https://doi.org/10.1016/s0300-9440(01)00200-4
https://doi.org/10.1016/s0300-9440(01)00200-4
Publikováno v:
Progress in Organic Coatings. 42:75-81
Photo-degradation studied by electron spin resonance (ESR) is described. Selected polyurethane film samples were exposed to different accelerated aging environments. These included narrow-band irradiation from 340 and 313 nm UV sources, broadband irr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9f5a0e001dbd908e5cdba05f6bb3c903
https://doi.org/10.1016/s0300-9440(01)00154-0
https://doi.org/10.1016/s0300-9440(01)00154-0