Quaternary Ammonium-based Deep Eutectic Solvents, Green Solvents Conference 2016, Mónia A. R. Martins, Liliana P. Silva, Paula V. A. Pontes, Guilherme J. Máximo, Olga Ferreira, Simão P. Pinho, Eduardo A. C. Batista, Antonio J. A. Meirelles and João A. P. Coutinho, Kiel, Germany