S1 Electronic Supporting Information Chiroptical Detection of a Model Ruthenium Dye in Water by Circularly Polarized- Electrochemiluminescence Silvia Voci, †a Francesco Zinna, †b,c Lorenzo Arrico, b Stéphane Grass, c Laurent Bouffier, a Jérôme Lacour,* c Lorenzo Di Bari* b and Neso Sojic* a a Univ. Bordeaux, Bordeaux INP, CNRS, Institut des Sciences Moléculaires, UMR 5255. 33607 Pessac, France. E-mail: neso.sojic@enscbp.fr b Dipartimento di Chimica e Chimica Industriale. University of Pisa. via G. Moruzzi 13, 56124, Pisa, Italy. E-mail: lorenzo.dibari@unipi.it c Department of Organic Chemistry. University of Geneva. Quai Ernest Ansermet 30, 1211 Geneva 4, Switzerland. E-mail: Jerome.lacour@unige.ch † These authors equally contributed Synthesis and characterizations ............................................................................................................ S2 CP-PL/ECL measurements...................................................................................................................... S3 References ............................................................................................................................................. S4 Electronic Supplementary Material (ESI) for ChemComm. This journal is © The Royal Society of Chemistry 2020