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General chemical structure of a polydiacetylene

Polydiacetylenes (PDAs) are a family of conducting polymers. They are created by the photopolymerization of diacetylene moieties. They have multiple applications from the development of organic films to immobilization of other molecules[1]

Diacetylene monomers undergoes polymerization via 1,4 addition under UV light irradiation. The polymerization is marked by intense blue colorization (monomer is colorless). The polymer shows thermochromism which is associated with blue to red color.[2] Depending upon the structure of the monomer (amphiphilic monomer) it can form vesicle during polymerization. These synthetic vesicles can have huge applications in future.[3]


  1. ^ Reppy, Mary A.; Pindzola, Bradford A. (2007). "Biosensing with polydiacetylene materials: structures, optical properties and applications". Chemical Communications (42): 4317. doi:10.1039/b703691d. 
  2. ^ Xuemei Sun , Tao Chen , Sanqing Huang , Li Li and Huisheng Peng (2010). "Chromatic polydiacetylene with novel sensitivity". Chem. Soc. Rev. 39: 4244–4257. doi:10.1039/C001151G. 
  3. ^ Sheldon Okada , Susan Peng , Wayne Spevak , and Deborah Charych (1998). "Color and Chromism of Polydiacetylene Vesicles". Acc. Chem. Res 31 (5): 229–239. doi:10.1021/ar970063v. 

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