Transparent glass with photochromism and luminescence has emerged as an attractive material due to its exciting prospects in the fields of information encryption and 3D optical storage. However, thermal stimulation has usually been used to bleach photochromic glass, limiting its applications. Herein, a new entirely photostimulation-induced reversible photochromic glass, doped with lanthanide ions and silver chloride (RE-Ag glass), was explored. Under the alternating stimulation of 365 nm light and a 690 nm laser, reversible photochromism (ΔR t = 91%) from transparent to black and luminescence modification (ΔR m = 93%) with high fatigue resistance were achieved in the RE-Ag glass. This is attributed to the formation and decomposition of silver nanoparticles in the glass host. The optical information can be recorded and erased in the RE-Ag glass with good rewritability and re-erasability, realizing a double-model 3D optical storage. The result highlights a new strategy to explore an entirely photostimulation induced photochromic glass with luminescence for 3D optical storage applications.

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The tetrahydroxyl derivative of BINOL, (S)-or (R)-1, and its analogs are synthesized. (S)-or (R)-1 can be used to conduct the enantioselective recognition of chiral amino alcohols. In comparison with BINOL, the two additional hydroxyl groups of (S)-or (R)-1 have increased the binding of this compound with the amino alcohols and significantly improved the fluorescence quenching efficiency. The fluorescence responses of (S)-or (R)-1 towards amino alcohols are compared with those of its analogs (R)-4 and (R)-6. It shows that the interaction of the central naphthyl hydroxyl groups of (S)-or (R)-1 with the substrates is responsible for the observed fluorescence quenching and the two additional alkyl hydroxyl groups increase the quenching efficiency.

h i g h l i g t s • A bio based flame retardant (IC) was synthesized via inclusion behavior • Impact of IC on ther mal sta bility and flame retardancy of EP was inve stigat ed • Flame reta rdant mechanism of EP/IC was proposed