@article{26c17dfb0f6947a586d66edb4d0dc9cd,
title = "Preparation of Siloxane-Based Microporous Crystals from Hydrogen-Bonded Molecular Crystals of Cage Siloxanes",
abstract = "Controlled assembly of siloxane-based building blocks provides a rational approach toward designed architectures of silica-based porous materials. Here, a non-hydrothermal method to prepare microporous crystals from cage-type oligosiloxanes is reported. The crystals formation occurs through an ordered assembly assisted by hydrogen bonds and subsequent intermolecular connection by silylation. Cage siloxanes with a double-four ring (D4R) structure were modified with dimethylsilanol groups. Intermolecular hydrogen bonding of the dimethylsilanol groups led to the formation of a pillared-layer structure consisting of D4R units. A new crystalline microporous material retaining the original ordered arrangement was realized by bridging adjacent cages within the crystals by direct silylation of the silanol groups with trichlorosilane. The use of this silylating agent created microporous crystals containing Si−H groups, proving the advantages of the proposed concept.",
keywords = "cage siloxanes, hydrogen bonds, microporous materials, silanols",
author = "Naoto Sato and Yoshiyuki Kuroda and Hiroaki Wada and Atsushi Shimojima and Kazuyuki Kuroda",
note = "Funding Information: The authors are grateful to Mr. S. Sato, Mr. H. Sato (Rigaku Corporation) and Mr. T. Goto (MCCL, Waseda University) for X-ray diffraction analysis, Mr. T. Matsuno and Mr. Y. Shimasaki for TEM/SEM observations, Dr. T. Shibue for solid-state 29Si NMR analysis, and Dr. E. Yamamoto, Mr. H. Iwashita, and Mr. K. Tochigi for fruitful discussions. This work was supported in part by JSPS KAKENHI Grant Number 15H03879 (Grant-in-Aid for Scientific Research B) and by a Grant-in-Aid for Strategic International Collaborative Research Program (SICORP) “France–Japan Joint Call on Molecular Technology” from Japan Science and Technology Agency (JST), and Kagami Memorial Research Institute for Materials Science and Technology research grant 2016. Funding Information: The authors are grateful to Mr. S. Sato, Mr. H. Sato (Rigaku Corporation) and Mr. T. Goto (MCCL, Waseda University) for X-ray diffraction analysis, Mr. T. Matsuno and Mr. Y. Shimasaki for TEM/SEM observations, Dr. T. Shibue for solid-state 29Si NMR analysis, and Dr. E. Yamamoto, Mr. H. Iwashita, and Mr. K. Tochi-gi for fruitful discussions. This work was supported in part by JSPS KAKENHI Grant Number 15H03879 (Grant-in-Aid for Scientific Research B) and by a Grant-in-Aid for Strategic International Collaborative Research Program (SICORP) “France–Japan Joint Call on Molecular Technology” from Japan Science and Technology Agency (JST), and Kagami Memorial Research Institute for Materials Science and Technology research grant 2016. Publisher Copyright: {\textcopyright} 2018 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim",
year = "2018",
month = nov,
day = "16",
doi = "10.1002/chem.201804441",
language = "English",
volume = "24",
pages = "17033--17038",
journal = "Chemistry - A European Journal",
issn = "0947-6539",
publisher = "Wiley-VCH Verlag",
number = "64",
}