Hydrogen Bond Acceptors and Additional Cationic Charges in Methylene Blue Derivatives: Photophysics and Antimicrobial Efficiency

<table>Synthesis of the precursors; conditions: (a) DCM, I<sub>2</sub>, RT, 2 h, quant.; (b) HNMe<sub>2</sub>, MeOH, RT, 14 h, 63%.</table>

BioMed Research International

Scheme 1: Hydrogen Bond Acceptors and Additional Cationic Charges in Methylene Blue Derivatives: Photophysics and Antimicrobial Efficiency 