Hybrid microporous and mesoporous organosilicate covalent polymers with high porosity

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F17%3A00098063" target="_blank" >RIV/00216224:14310/17:00098063 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1016/j.micromeso.2016.11.012" target="_blank" >http://dx.doi.org/10.1016/j.micromeso.2016.11.012</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.micromeso.2016.11.012" target="_blank" >10.1016/j.micromeso.2016.11.012</a>

Result language

angličtina

Original language name

Hybrid microporous and mesoporous organosilicate covalent polymers with high porosity

Original language description

A novel non-hydrolytic sol-gel synthesis of hybrid organosilicates is reported allowing control of micro/mesoporous character of the xerogels by variation of the silicon precursor. The polycondensation reaction of silicon(IV) acetate, Si(OAc)(4), with 1,3,5-trihydroxybenzene (THB) in dry dioxane at 100 degrees C produces acetic acid and highly porous amorphous aromatic organosilicate xerogels. Their apparent BET surface areas are as high as 990 m(2) g(-1) and the total pore volume is 0.843 cm(3) g-1. These materials are mostly microporous with a low abundance of mesopores and an average pore size of 3.5 nm. The reaction of HSi(OAc)(3) with THB produced a novel mesoporous material with properties superior to xerogels obtained from Si(OAc)(4). The BET surface area of 933 m(2) g(-1) is retained upon heating and average pore size reached 6.0 nm. The total pore volume of 1.36 cm(3) g(-1) is the highest value achieved in porous aromatic organosilicates so far and is comparable to values typical for 3D covalent organic networks (COFs). The materials are stable up to 400-500 degrees C but they are sensitive to hydrolysis in moist air. The reactions of other silicon precursors (MeSi(OAc)(3) and (BuSi)-Bu-t(OAc)(3)) and larger polyphenol connectors, 1,3,5-tris(4 '-hydroxyphenyl)benzene (THPB), 2,4,6-tris(4 '-hydroxyphenyl)-1,3,5-triazine (THPTA), and 2,3,6,7,10,11-hexahydroxytriphenylene (HHTP), produced materials with less satisfactory properties. (C) 2016 Elsevier Inc. All rights reserved.

Czech name

—

Czech description

—

Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10402 - Inorganic and nuclear chemistry

Project

<a href="/en/project/LQ1601" target="_blank" >LQ1601: CEITEC 2020</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2017

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

MICROPOROUS AND MESOPOROUS MATERIALS

ISSN

1387-1811

e-ISSN

—

Volume of the periodical

240

Issue of the periodical within the volume

March

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

11

Pages from-to

205-215

UT code for WoS article

000395604600025

EID of the result in the Scopus database

—