Supporting Information Page S1 Naphthoquinone-Based Colorimetric and Fluorometric Dual-Channel Chemosensor for the Detection of Fe 2+ Ion and Its Application in Bio-Imaging of Live Cells and Zebrafish Palanisamy Ravichandiran, † Anna Boguszewska-Czubara, ∥ Maciej Masłyk, ⊥ Antony Paulraj Bella, # Sivakumar Allur Subramaniyan, ‡ Princy Merlin Johnson, # Kwan Seob Shim, ‡ Hwan Gyu Kim, † and Dong Jin Yoo* ,†,§ † Department of Life Sciences, College of Natural Sciences, Chonbuk National University, Jeollabuk-do 54896, Republic of Korea. ∥ Department of Medical Chemistry, Medical University of Lublin, ul. Chodźki 4A, 20-093, Lublin, Poland. ⊥ Department of Molecular Biology, Faculty of Biotechnology and Environmental Sciences, The John Paul II Catholic University of Lublin, ul. Konstantynów 1i, 20-708 Lublin, Poland. # PG and Research Department of Chemistry, Bishop Heber College, Tiruchirappalli-620017, Tamil Nadu, India. ‡ Department of Animal Biotechnology, College of Agriculture and Life Sciences, Chonbuk National University, Jeollabuk-do 54896, Republic of Korea. § Department of Energy Storage/Conversion Engineering of Graduate School, and Hydrogen and Fuel Cell Research Center, Chonbuk National University, Jeollabuk-do 54896, Republic of Korea. *Correspondence Prof. Dong Jin Yoo-PhD Department of Life Sciences, Department of Energy Storage/Conversion Engineering of Graduate School, Chonbuk National University, Jeollabuk-do 54896, Republic of Korea Tel: +82-(0)63-270-3608 /+82-(0)10-2110-2328 Fax: +82-(0)63-270-3909 E-mail: djyoo@jbnu.ac.kr Pages: S1-S22 Figures: S1-S15 Table: S1