Disappeared supramolecular isomer reappears with perylene guest

In-Hyeok Park; Atanu Dey; Kenta Sasaki; Masaaki Ohba; Shim Sung Lee; Jagadese J Vittal

doi:10.1107/S2052252520001451

Disappeared supramolecular isomer reappears with perylene guest

IUCrJ. 2020 Feb 27;7(Pt 2):324-330. doi: 10.1107/S2052252520001451. eCollection 2020 Mar 1.

Authors

In-Hyeok Park¹, Atanu Dey¹, Kenta Sasaki^{1

2}, Masaaki Ohba², Shim Sung Lee³, Jagadese J Vittal¹

Affiliations

¹ Department of Chemistry, National University of Singapore, 3 Science Drive 3, 117543, Singapore.
² Department of Chemistry, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan.
³ Department of Chemistry and Research Institute of Natural Science, Gyeongsang National University, Jinju 52828, Republic of Korea.

Abstract

Among different types of polymorphism, disappearing polymorphism deals with the metastable kinetic form which can not be reproduced after its first isolation. In the world of coordination polymers (CPs) and metal-organic frameworks (MOFs), despite the fact that many types of supramolecular isomerism exist, we are unaware of disappearing supramolecular isomerism akin to disappearing polymorphism. This work reports a MOF with dia topology that could not be reproduced, but subsequent synthesis yielded another supramolecular isomer, a double-pillared-layer MOF. When perylene was added in the same reaction, the disappeared dia MOF reappeared with perylene as a guest in the channels. Interestingly, the photoluminescence of the dia MOF with a perylene guest is dominated by the emission of the guest molecule. The influence of guest molecules on the stabilization of the supramolecular isomers of a MOF opens up a strategy to access MOFs with different structures.

Keywords: MOFs; coordination polymers; crystal engineering; disappearing polymorphism; metal–organic frameworks; polymorphism; supramolecular isomerism; supramolecular isomers.

Grants and funding

This work was funded by Ministry of Education, Singapore (National University of Singapore grants WBS R-143-000-A12-114 and WBS R-143-000-B13-114. National Research Foundation (NRF) of South Korea grants 2017R1A4A1014595 and 2019R1A2C1002075.