Synthetic Organic Chemistry

Project Description

Fluorescence-based analytical tools are becoming very attractive for rapid detection of explosives. Fluorescence emission is very sensitive phenomena and any change in fluorescence emission can be observed upon interactions of fluorescence probes with analytes present in the explosives. Explosive molecules are extremely electron deficient materials due to the presence of electron withdrawing groups such as nitro group. Such electron deficient molecules can easily interact and bind with electron-rich fluorescent molecules (fluorophors). Fluorescence of a fluorphore can be quenched through molecular interactions between the fluorophore and specific explosive material. The oxidation and reduction potentials would predict the direction of electron flow. Energy of ground state orbitals and excited state orbitals would also predict the direction of photo-induced electron transfer. With this in mind, π-electron rich tetraphenyethylene and fluorene-based conjugated polymers are designed. Electron rich conjugated polymers will provide basis for contact with electro-deficient explosive molecules through the donor-acceptor (D-A) interactions. A conjugated polymer with fluorene backbone and phenylene as spacer units is designed for rapid detection of ultra-trace analytes from explosive molecules. Sterically large adamantane group and pyrene moiety will serve as bulky side chains which will impart desired properties to the proposed polymers. A library of relevant fluorescent polymers will be generated by varying size of side chains.

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Project Funding

Sr. No.Funding BodyFunds
1 PSF of Pakistan and NSFC China 4958118 Rs

Members

  • Dr. Sohail Anjum Shahzad