The hydrogen-bonded dianion of vitamin K1 produced in aqueous–organic solutions exists in equilibrium with its hydrogen-bonded semiquinone anion radical

• Main Authors: Lim, Zhen Hui, Chng, Elaine Lay Khim, Hui, Yanlan, Webster, Richard David
• Other Authors: School of Physical and Mathematical Sciences
• Format: Article
• Language: English
• Published: 2013
• Online Access: https://hdl.handle.net/10356/99251; http://hdl.handle.net/10220/17370
• Institution: Nanyang Technological University

When the quinone, vitamin K1 (VK1), is electrochemically reduced in aqueous-acetonitrile solutions (CH3CN with 7.22 M H2O), it undergoes a two-electron reduction to form the dianion that is hydrogen-bonded with water [VK1(H2O)y2–]. EPR and voltammetry experiments have shown that the persistent exist...