Zobrazeno 1 - 10
of 20
pro vyhledávání: '"I-Ssuer Chuang"'
Publikováno v:
Environmental Science & Technology. 33:2224-2233
{sup 2}H NMR spectra and interpretations are presented on a series of samples, each consisting of a deuterium-labeled organic pollutant (trichloroethylene, acetone, pyridine, benzene, or ethylene glycol) adsorbed on a soil component (montmorillonite
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::278033661f8b9f8b9aa5e4ae2691b07c
https://doi.org/10.1021/es981221w
https://doi.org/10.1021/es981221w
Publikováno v:
Journal of Non-Crystalline Solids. 212:281-291
Polysiloxane-immobilized phosphine ligand systems have been prepared by hydrolytic condensation of mixtures of Si(OEt)4 and (R′O)3Si(CH2)nPPh2 (n = 2, R′ = Me; n = 3, R′ = Et) Polysiloxane-immobilized phosphine-amine and phosphine-thiol ligand
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c0741b53de66e9475e624fecec7cec45
https://doi.org/10.1016/s0022-3093(96)00682-5
https://doi.org/10.1016/s0022-3093(96)00682-5
Publikováno v:
Journal of Non-Crystalline Solids. 209:19-39
Polysiloxane-immobilized amine and diamine ligand systems have been made by hydrolytic condensation of Si(OEt)4 with (EtO)3Si(CH2)3NH2 or (MeO)3Si(CH2)3NH(CH2)2NH2. The corresponding triamine ligand was made from the reaction of 3-chloropropylpolysil
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cfba30d12d9b9ab02cff535fa300bc28
https://doi.org/10.1016/s0022-3093(96)00534-0
https://doi.org/10.1016/s0022-3093(96)00534-0
Autor:
Gary E. Maciel, I-Ssuer Chuang and
Publikováno v:
Journal of the American Chemical Society. 118:401-406
By studying 1H→29Si cross-polarization dynamics of two untreated and two “dry” silica gel samples (one evacuated at 25 °C and one evacuated at 200 °C), we find that all the surface silanols on the two untreated silicas are hydrogen bonded, ei
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::661f4741d8aafe80ff596ab75b95b442
https://doi.org/10.1021/ja951550d
https://doi.org/10.1021/ja951550d
Autor:
I-Ssuer Chuang, Gary E. Maciel
Publikováno v:
Polymer. 35:1621-1628
High-quality natural-abundance 15N cross-polarization/magic-angle spinning (c.p.-m.a.s.) spectra of urea-formaldehyde (UF) resins were obtained by employing a large-volume (2.5 cm3) magic-angle spinning (m.a.s.) rotor. 15N c.p.-m.a.s. nuclear magneti
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9e6f10189a01e07afc7769891db58fdd
https://doi.org/10.1016/0032-3861(94)90834-6
https://doi.org/10.1016/0032-3861(94)90834-6
Autor:
I-Ssuer Chuang, Gary E. Maciel
Publikováno v:
Polymer. 35:1602-1620
13C cross-polarization/magic-angle spinning nuclear magnetic resonance spectroscopy has been used to investigate urea-formaldehyde (UF) resins prepared at room temperature from reaction mixtures containing N,N′-dimethylolurea or various pretreated
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::daf87604ad8858b4299e8a0638339a74
https://doi.org/10.1016/0032-3861(94)90833-8
https://doi.org/10.1016/0032-3861(94)90833-8
Publikováno v:
Journal of the American Chemical Society. 115:8695-8705
Silica gels were deuterium-exchanged with D 2 O at 25 and 100 o C. 29 Si CP-MAS NMR results indicate that for a silica gel with lower surface area, 9.3% of the single silanols remains undeuterated at 25 o C and 4.0% of the single silanols remains und
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::37dddf8f7e9d90af2d8e921d4667e51a
https://doi.org/10.1021/ja00072a024
https://doi.org/10.1021/ja00072a024
Publikováno v:
Journal of the American Chemical Society. 115:6786-6794
The interaction of water with the silica surface is explored using 1 H NMR technique. The silica is examined at various levels of hydration/dehydration and temperature, using line narrowing by magic-angle spinning, with or without multiple-pulse aver
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::258a252a13465d9bdf7f69fb645470ff
https://doi.org/10.1021/ja00068a041
https://doi.org/10.1021/ja00068a041
Autor:
I Ssuer Chuang, Gary E. Maciel
Publikováno v:
Macromolecules. 25:3204-3226
Urea-formaldehyde (UF) resins prepared at room temperature from reaction mixtures with four different formaldehyde-to-urea molar ratios (1.00, 1.50, 2.00, and 3.00), three different urea concentrations, and six pH values (1,3,5,7,9, and 12) were inve
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fa3e6a79296aa81e41a0ecb242f2fd57
https://doi.org/10.1021/ma00038a029
https://doi.org/10.1021/ma00038a029
Publikováno v:
The Journal of Physical Chemistry. 96:4027-4034
Four {sup 29}Si CP-MAS NMR pulse sequences have been used to study the effects of {sup 1}H spin exchange among various {sup 1}H spin reservoirs on a silica gel surface. Both {sup 1}H-{sup 29}Si dipolar-dephasing experiments and proton-coupled {sup 29
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4962e83c37f1616bcff6429bc04900ef
https://doi.org/10.1021/j100189a022
https://doi.org/10.1021/j100189a022