Figure 2: Configurational Selectivity of Pillararene for Alkane Molecule (image) Kanazawa University Share Print E-Mail Caption n-alkane gas molecule can be captured because of its molecular shape (configuration) for the cavity of pillararene, whereas branched alkane molecule cannot. Credit Kanazawa University Usage Restrictions The image may only be used with appropriate caption and credit. Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.