Journal
OPTICAL MATERIALS
Volume 72, Issue -, Pages 442-446Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.optmat.2017.06.037
Keywords
Aggregation-induced emission; Rewritable media; Naphthalene derivative
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Funding
- Research Center for Advanced Materials Science (RCAMS),King Khalid University, Saudi Arabia
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Organic molecules having extended pi-conjugated moieties is useful for creating 'dynamic' functional materials by modulating the photophysical properties and molecular packing through non-covalent interactions. Herein, we report the photoluminescence properties of a luminogen, NBA, exhibiting aggregation-induced emission (AIE) characteristics, synthesized by Knoevenagel condensation reaction between 2-Hydroxy naphthaldehyde and malononitrile. NBA emits strongly upon aggregation and in solid state with large Stokes shift whereas it is non emissive in pure solvents. The aggregation induced emission behavior of the compound was carried out in DMSO (good solvent)-water mixture (poor solvent) with water fraction (fw) ranging from 0% to 98%. The AIE property of the luminogen were further exploited for fabricating rewritable fluorescent paper substrates that found applications in security printing and data storage where the written images or letters stored on the filter paper are invisible under normal light. (C) 2017 Elsevier B.V. All rights reserved.
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