Journal Pre-proof Zr-MOF with free carboxylic acid for storage and controlled release of caffeine Mithun Sarker, Sung Hwa Jhung PII: S0167-7322(19)34505-2 DOI: https://doi.org/10.1016/j.molliq.2019.112060 Reference: MOLLIQ 112060 To appear in: Journal of Molecular Liquids Received date: 10 August 2019 Revised date: 9 October 2019 Accepted date: 3 November 2019 Please cite this article as: M. Sarker and S.H. Jhung, Zr-MOF with free carboxylic acid for storage and controlled release of caffeine, Journal of Molecular Liquids(2019), https://doi.org/10.1016/j.molliq.2019.112060 This is a PDF file of an article that has undergone enhancements after acceptance, such as the addition of a cover page and metadata, and formatting for readability, but it is not yet the definitive version of record. This version will undergo additional copyediting, typesetting and review before it is published in its final form, but we are providing this version to give early visibility of the article. Please note that, during the production process, errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. © 2019 Published by Elsevier.