|
ИСТИНА |
Войти в систему Регистрация |
ИПМех РАН |
||
Porosity of Rigid Dendrimers in Bulk: Interdendrimer Interactions and Functionality as Key Factorsстатья
Статья опубликована в высокорейтинговом журнале
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 15 декабря 2021 г.
- Авторы: Serenko Olga, Skupov Kirill, Bakirov Artem, Kuchkina Nina, Shifrina Zinaida, Muzafarov Aziz
- Журнал: Nanomaterials
- Том: 11
- Номер: 10
- Год издания: 2021
- Издательство: MDPI
- Местоположение издательства: Basel, Switzerland
- Первая страница: 2600
- DOI: 10.3390/nano11102600
- Аннотация: The porous structure of second- and third-generation polyphenylene-type dendrimers was investigated by adsorption of N2, Ar, and CO2 gases, scanning electron microscopy and small-angle X-ray spectroscopy. Rigid dendrimers in bulk are microporous and demonstrate a molecularsieve effect. When using CO2 as an adsorbate gas, the pore size varies from 0.6 to 0.9 nm. This ismost likely due to the distances between dendrimer macromolecules or branches of neighboringdendrimers, whose packing is mostly realized due to intermolecular interactions, in particular, π–πinteractions of aromatic fragments. Intermolecular interactions prevent the manifestation of theporosity potential inherent to the molecular 3D structure of third-generation dendrimers, while for the second generation, much higher porosity is observed. The maximum specific surface area for the second-generation dendrimers was 467 m2/g when measured by CO2 adsorption, indicating thatshorter branches of these dendrimers do not provide dense packing. This implies that the possible universal method to create porous materials for all kinds of rigid dendrimers is by a placement of bulky substituents in their outer layer.
- Добавил в систему: Серенко Ольга Анатольевна
Прикрепленные файлы
| № | Имя | Описание | Имя файла | Размер | Добавлен |
|---|---|---|---|---|---|
| 1. | nanomaterials-11-02600.pdf | nanomaterials-11-02600.pdf | 1,5 МБ | 23 января 2023 [bakirov_artem] |