Cycloparaphenylene as a molecular porous carbon solid with uniform pores exhibiting adsorption-induced softness

Hirotoshi Sakamoto, Toshihiko Fujimori, Xiaolin Li, Katsumi Kaneko, Kai Kan, Noriaki Ozaki, Yuh Hijikata, Stephan Irle, Kenichiro Itami

Research output: Contribution to journalArticlepeer-review

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Abstract

The molecular carbon nanoring, cycloparaphenylene (CPP), is fascinating as a new class of carbonaceous porous solids with the uniform structure of an all-benzene surface. We explored the feasibility of [12]CPP as a carbon-based porous material and uncovered its unique adsorption properties due to its shape and highly nonpolar surface. Unlike other porous carbon solids, [12]CPP shows stepwise adsorption behaviors sensitive to the functionalities of the guest molecules. In situ powder X-ray diffraction and infrared spectra provided insights into how [12]CPP accommodates the guest molecules with structural deformation retaining its structural periodicity during the whole adsorption process, which exemplifies that this molecular nanoring represents an unprecedented carbon-based soft porous solid.

Original languageEnglish
Pages (from-to)4204-4210
Number of pages7
JournalChemical Science
Volume7
Issue number7
DOIs
StatePublished - 2016
Externally publishedYes

Funding

This work was supported by the Exotic Nanocarbons Project, Japan Regional Innovation Strategy Program by the Excellence, and ERATO program of Japan Science and Technology Agency (JST), and Grants-in-Aid for Scientific Research (A) (24241038). ITbM is supported by the World Premier International Research Center Initiative (WPI), Japan. The synchrotron radiation experiments were performed at the BL02B2 of SPring-8 with the approval of the Japan Synchrotron Radiation Research Institute (JASRI) (Proposal No. 2012B1591, 2013A1313, 2013B1119, 2014A1276, 2014B1428, and 2015A1490)

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