Accepted Manuscript Recognition of switching on or off fluorescence emission spectrum on the Schiff- bases as a Mg 2+ chemosensor: A first principle DFT and TD-DFT study Avat Arman Taherpour, Morteza Jamshidi, Omid Rezaei PII: S0022-2860(17)30850-5 DOI: 10.1016/j.molstruc.2017.06.069 Reference: MOLSTR 23955 To appear in: Journal of Molecular Structure Received Date: 3 May 2017 Revised Date: 14 June 2017 Accepted Date: 15 June 2017 Please cite this article as: A.A. Taherpour, M. Jamshidi, O. Rezaei, Recognition of switching on or off fluorescence emission spectrum on the Schiff-bases as a Mg 2+ chemosensor: A first principle DFT and TD-DFT study, Journal of Molecular Structure (2017), doi: 10.1016/j.molstruc.2017.06.069. This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. 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.