1610474-45-7Relevant academic research and scientific papers
Pentacenequinone derivatives: Aggregation-induced emission enhancement, mechanism and fluorescent aggregates for superamplified detection of nitroaromatic explosives
Kaur, Sandeep,Gupta, Ankush,Bhalla, Vandana,Kumar, Manoj
, p. 7356 - 7363 (2014)
Pentacenequinone derivatives 5-9 have been synthesized by a Suzuki-Miyaura coupling protocol. These derivatives form fluorescent aggregates in mixed aqueous media due to their aggregation-induced emission enhancement (AIEE) attributes. Interestingly, size dependent emission enhancement is observed in the case of derivatives 5-7 and the effect of increase in the number of pyridine rotors on fluorescence emission of pentacenequinone derivatives 6-7 in solution and in the aggregate state confirms that the AIEE phenomenon is at the cost of aggregation driven growth and restriction of intramolecular rotation (RIR). On the other hand, derivatives 8 and 9 having electron rich phenyl groups are donor-accepter-donor type systems which exhibit an intermolecular charge transfer state (ICT) and form fluorescent aggregates in mixed aqueous media. In addition to this, the AIEE characteristics endow pentacenequinone derivatives 5-9 with sensing functionalities such as detection of nitroaromatic compounds. TLC strips of AIEE-active pentacenequinone derivatives 5-9 provide a more convenient and cost-effective approach for the trace detection of nitroaromatic explosives. This journal is the Partner Organisations 2014.
Pentacenequinone derivatives for preparation of gold nanoparticles: Facile synthesis and catalytic application
Sharma Nee Kamaldeep, Kamaldeep,Kaur, Sandeep,Bhalla, Vandana,Kumar, Manoj,Gupta, Ankush
, p. 8369 - 8375 (2014/06/09)
We have designed and synthesized pentacenequinone/pentacenequinodimethane derivatives 3, 4 and 6 having nitrile groups using Suzuki-Miyaura coupling and Knoevenagel condensation protocols. Interestingly, these pentacenequinone/ pentacenequinodimethane derivatives form fluorescent aggregates in aqueous media due to their aggregation-induced emission enhancement (AIEE) characteristics. Further these fluorescent aggregates generate gold nanoparticles at room temperature without addition of any external reducing agent, stabilizing agent and shape-directing additives. In addition, these nanomaterials have been found to have high catalytic activity for the reduction of p-nitroaniline to p-phenylenediamine.
