کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
63179 47674 2006 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Relationship between infrared spectra and stoichiometry of pyridine-H3PW12O40 salts using a new TGA-infrared coupling
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی کاتالیزور
پیش نمایش صفحه اول مقاله
Relationship between infrared spectra and stoichiometry of pyridine-H3PW12O40 salts using a new TGA-infrared coupling
چکیده انگلیسی

A new thermogravimetric–infrared coupled apparatus was used to determine the stoichiometry of the pyridinium salts resulting from absorption of pyridine on H3PW12O40 (HPW). Gravimetric measurements showed that two pyridinium salts with definite stoichiometry—(Py2H+)3PW12O40 (bis-pyridinium salt) and (PyH+)3PW12O40 (mono-pyridinium salt)—are formed. Their infrared spectra closely correspond to those reported for pyridinium salts in strong acid solutions. The splitting of the ν8b and ν19b bands of absorbed pyridine (1610–1603 cm−1 and 1540–1532 cm−1, respectively) is characteristic of mono-pyridinium formation in the HPW structure.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Catalysis - Volume 241, Issue 1, 1 July 2006, Pages 221–224
نویسندگان
, , , , , , ,