Buckley, Laura E R Tunable Chiral Second-Order Nonlinear Optical Chromophores Based on Helquat Dications. [electronic resource] - The journal of physical chemistry. A Aug 2017 - 5842-5855 p. digital Publication Type: Journal Article ISSN: 1520-5215 Standard No.: 10.1021/acs.jpca.7b06057 doi