Co-Crystal Compounded by Coordination, Halogen and Hydrogen Bonds and its Self-Protective Phosphorescence

摘要

The cocrystal has been compounded by 5-iodosaiicylic acid (5-Isal) and lead ion. Lead ion coordinated with two carboxyl groups of two 5-Isal molecules to form "V-like" structure. Via the interactions of respective two C-I—C halogen bondings (XBs) and C-H—I-C hydrogen bondings (HBs), the "V-like" structure cemented into one dimension (1D) infinite "Zigzag-like" chain structures. The oxygen molecules were prevented from freely diffuse and permeate in cocrystal due to the compact structure, resulting to the generation of non-protective room-temperature phosphorescence. The synergistic cooperation and competition among various weak interactions should be an important factor to assembly supramolecular organic solid materials and understand the generation mechanism of novel property.