Issue 16, 2019

Impact of confinement in multimolecular inclusion compounds of melamine and cyanuric acid

Abstract

Supramolecular cavities can be found in clathrates and self-assembling capsules. In these computational experiments, we studied the effect of folding planar hydrogen-bonded supramolecules of melamine (M) and cyanuric acid (CA) into stable cage-like quartets. Based on dispersion-corrected density functional theory calculations at the ωB97XD/6-311++G(d,p) level, we show the flexibility of M and CA molecules to form free confined spaces. Our bonding analysis indicates that only CA can form a cage, which is more stable than its planar systems. We then studied the capacity of the complexes to host ionic and neutral monoatomic species like Na+, Cl and Ar. The encapsulation energies range from −2 to −65 kcal mol−1. A detailed energy decomposition analysis (EDA) supports the fact that the triazine ring of CA is superior to the M one for capturing chloride ions. In addition, the EDA and the topology of the electron density, by means of the Atoms in Molecules (AIM) theory and electrostatic potential maps, reveal the nature of the host–guest interactions in the confined space. The CA cluster appears to be the best multimolecular inclusion compound because it can host the three species and keep its cage structure, and therefore it could also act as a dual receptor of the ionic pair Na+Cl. We think these findings could inspire the design of new heteromolecular inclusion compounds based on triazines and hydrogen bonds.

Graphical abstract: Impact of confinement in multimolecular inclusion compounds of melamine and cyanuric acid

Supplementary files

Article information

Article type
Paper
Submitted
17 Dec 2018
Accepted
22 Feb 2019
First published
25 Feb 2019

Phys. Chem. Chem. Phys., 2019,21, 8205-8214

Impact of confinement in multimolecular inclusion compounds of melamine and cyanuric acid

A. N. Petelski, S. C. Pamies, A. G. Sejas, N. M. Peruchena and G. L. Sosa, Phys. Chem. Chem. Phys., 2019, 21, 8205 DOI: 10.1039/C8CP07705C

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements