ABSTRACT
A novel reactivity-triggering strategy for inert organic molecules was developed via the chemical properties of a crystal-solution interface. Upon self-assembling to form a {002} crystal interface, inactive 9-anthracene boric acid was transformed into an ultra-high active state, triggering a catalyst-free, environmentally benign, aromatic substitution and oxidation reaction, which achieved 99% yield in 1 h under ambient conditions.
ABSTRACT
The stability of pure organic room-temperature phosphorescent (RTP) materials in air has been a research hotspot in recent years. Without crystallization or encapsulation, a new strategy was proposed to obtain self-stabilized organic RTP materials, based on a complete ionization of a photo-induced charge separation system. The ionization of aromatic phenol 4-carbazolyl salicylaldehyde (CSA) formed a stable H-bonding anion-cation radical structure and led to the completely amorphous CSA-I film. Phosphorescent lifetimes as long as 0.14â s at room temperature and with direct exposure to air were observed. The emission intensity was also increased by 21.5-fold. Such an amorphous RTP material reconciled the contradiction between phosphorescence stability and vapor permeability and has been successfully utilized for peroxide vapor detection.
