Torch-Like High-Performance Nlo and Electrochromic Bifunctional Molecular Switch Exhibiting Superalkalide and Superalkali Metal Salt Characteristics

Abstract

Bifunctional molecular switch with bifunctional characteristics is more suitable for miniaturization of molecular device and can significantly improve its energy efficiency. For novel designed torch-like nonlinear optical (NLO) and electrochromic bifunctional molecular switch, it is exhibited that, from superalkali metal salt Liδ+(HCN)4Liδ+ to superalkali-alkalide ion pair of Liδ+(HCN)4Liδ-, the increases in static and dynamic first hyperpolarizabilities constitute a 1~2 orders of magnitude, and coloration changes from light-brown to blue. Then, the former is an extinguishing torch (off form) while the latter is a lighting torch (on form) for the NLO and electrochromic bifunctional molecular switch. Similar behaviors occur for Na(HCN)4Li and K(HCN)4Li.

Keywords: Bifunctional molecular switch, Superalkali-alkalide ion pairs, Nonlinear optical response, Electrochromic