محبوبترین نویسندگان :
نویسندگان مقالات پربازدید :
مقالات شیمیایی 2013
جزئیات رویداد
همایش ، رویداد ، ژورنال
اینستاگرام تی پی بین
حوزه های تحت پوشش رویداد

  • x-ray absorption spectroscopy of nanostructured polyanilines

    نویسندگان :
    کلمات کلیدی :
    جزئیات بیشتر مقاله
    • تاریخ ارائه: 1392/07/24
    • تاریخ انتشار در تی پی بین: 1392/07/24
    • تعداد بازدید: 1390
    • تعداد پرسش و پاسخ ها: 0
    • شماره تماس دبیرخانه رویداد: -
     in this paper, x-ray absorption near edge spectroscopy at the nitrogen k edge (n k xanes) data of polyaniline (pani) and its derivatives were revisited and expanded. the n k xanes spectra of pani nanocomposites and pani nanofibers were also investigated. the analysis of n k xanes spectra were done by the deconvolution of bands and the 1s → π* and 1s → σ* transitions were assigned by a correlation with the n k xanes spectra of smaller organic compounds. the “free” forms of pani were dominated by bands from 397.7 ev to 399.1 ev attributed to imine and radical cation nitrogen atoms, respectively. nitrogen bonded to phenazine-like rings can also be seen, mainly for pani prepared at ph higher than 3.0. the spectra of nanocomposites show sharper bands than the “free” polymers as well as new bands at 398.8 ev and 405–406 ev. these new bands were assigned to phenazine-like rings and azo bonds in the structure of the polymers (polyaniline, polybenzidine, and poly(p-phenylediamine)) within the galleries of the montmorillonite clay. pani nanofibers doped with hcl or hclo4 show bands related to phenazine-like rings and/or dication segments of pani, indicating that these segments are important in the formation of pani nanofibers.

سوال خود را در مورد این مقاله مطرح نمایید :

با انتخاب دکمه ثبت پرسش، موافقت خود را با قوانین انتشار محتوا در وبسایت تی پی بین اعلام می کنم
مقالات جدیدترین رویدادها
مقالات جدیدترین ژورنال ها