POLIANILIN MATRITSASIDA C70 FULLERENINING OPTIK XOSSALARINING O‘ZGARISHI
Annotatsiya
Ushbu tadqiqotda N-metil-2-pirrolidon (NMP) muhitidagi polianilin (PANI) va C70 fulleren eritmalarining optik xossalari hamda agregatsiya xususiyatlari o‘rganilgan. Eritmadagi molekulalararo o‘zaro ta’sirlar va strukturaviy o‘zgarishlarni tahlil qilish uchun refraktometriya, UV–Vis yutilish spektroskopiyasi va Raman spektroskopiyasidan foydalanilgan. Sindirish ko‘rsatkichi natijalari konsentratsiya ortishi bilan uning oshishini va vaqt o‘tishi bilan biroz kamayishini ko‘rsatdi, bu esa PANI/C70 tizimlarida qutblanuvchanlikning kuchayishi va bosqichma-bosqich strukturaviy relaksatsiyani bildiradi. Yutilish spektroskopiyasi C70 ning UV sohasida kuchli yutilishni yuzaga keltirishini va bir vaqtning o‘zida PANI ning ko‘rinadigan diapazondagi xarakterli yutilish bandasini o‘zgartirishini ko‘rsatdi, bu donor–akseptor o‘zaro ta’sirlarini tasdiqlaydi. Vaqtga bog‘liq spektral o‘zgarishlar C70 agregatsiyasi va PANI zanjirlarining konformatsion qayta tashkil etilishini ko‘rsatadi. Raman tahlili vibratsion javobda NMP ustunligini, kichik spektral farqlar esa eritmadagi komponentlarning mavjudligi va barqarorligini tasdiqlashini ko‘rsatdi. Natijalar PANI/C70 tizimlarida erituvchi vositasidagi o‘zaro ta’sirlar, agregatsiya mexanizmlari va optik xatti-harakatlar haqida kompleks tasavvur beradi.
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