Identification of Multiple Cs+ Adsorption Sites in a Hydroxy-interlayered Vermiculite-like Layered Silicate through 133Cs MAS NMR Analysis
نویسندگان
چکیده
منابع مشابه
C CP / MAS NMR Study of the Layered Compounds
1 3 C C P / M A S N M R spectra were measured on the layered compounds [ C 6 H 5 C H 2 C H 2 N H 3 ] 2 [CH 3 NH 3 ] n _ 1Pb„I 3 n + j (w = 1, 2). The linewidth of the resonance peak corresponding to the phenyl carbons changed with temperature. The maximum broadening took place at 363 K for both compounds. The activation energy £ a for the reorientation of the phenyl group was determined to be 2...
متن کاملa swot analysis of the english program of a bilingual school in iran
با توجه به جایگاه زبان انگلیسی به عنوان زبانی بین المللی و با در نظر گرفتن این واقعیت که دولت ها و مسئولان آموزش و پرورش در سراسر جهان در حال حاضر احساس نیاز به ایجاد موقعیتی برای کودکان جهت یاد گیری زبان انگلیسی درسنین پایین در مدارس دو زبانه می کنند، تحقیق حاضر با استفاده از مدل swot (قوت ها، ضعف ها، فرصتها و تهدیدها) سعی در ارزیابی مدرسه ای دو زبانه در ایران را دارد. جهت انجام این تحقیق در م...
15 صفحه اولInterrogating the Lewis Acidity of Metal Sites in Beta Zeolites with 15N Pyridine Adsorption Coupled with MAS NMR Spectroscopy.
The Lewis acidity of isolated framework metal sites in Beta zeolites was characterized with 15N isotopically labeled pyridine adsorption coupled with magic-angle spinning nuclear magnetic resonance (MAS NMR) spectroscopy. The 15N chemical shift of adsorbed pyridine was found to scale with the acid character of both Lewis (Ti, Hf, Zr, Nb, Ta, and Sn) and Brønsted (B, Ga, and Al) acidic heteroato...
متن کاملEffect of Photolytic Oxalate Treatment on Soil Hydroxy-interlayered Vermiculites
-The effects of Na-citrate-dithionite (NaCD), ammonium oxalate in the dark (NH4Ox-D), and photolytic reaction under ultraviolet radiation (NH4Ox-P) on the mineralogy of <2-/~m fractions of selected soils from Virginia were investigated. The NH4Ox-D treatment removed the smallest amounts of Al (<0.22%) and Fe (<0.50%) from all soils, indicating low levels of noncrystalline material in these mate...
متن کاملOptimized multiple quantum MAS lineshape simulations in solid state NMR
The majority of nuclei available for study in solid state Nuclear Magnetic Resonance have half-integer spin I > 1/2, with corresponding electric quadrupole moment. As such, they may couple with a surrounding electric field gradient. This effect produces anisotropic line broadening in spectra for distinct chemical species in polycrystalline solids. In Multiple Quantum Magic Angle Spinning (MQMAS...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Chemistry Letters
سال: 2016
ISSN: 0366-7022,1348-0715
DOI: 10.1246/cl.160850