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Department of Chemistry & Chemical Biology













C&CB PhD Defence Seminar – Cody Gale
	
 Apr 1, 2021 
 1:30PM to 2:30PM





Event Categories  Seminars and  Thesis Defense






























Date/Time

Date(s) - 01/04/2021
1:30 pm - 2:30 pm





Title:                    STRATEGIESFOR THE INCORPORATION OF PORPHYRINS IN POLYSILOXANES AND THEIR APPLICATIONS


Date:                    Thursday, April 1, 2021 


Time:                    1:30 p.m.   


Zoom:                  available by request to sprucel@mcmaster.ca 


Supervisor:         Dr. Michael Brook 


Abstract: 


Porphyrinsare a class of natural and synthetic aromatic macrocycles that have receivedextensive investigation because of their unique chemical and optoelectronicproperties. Their properties, which have led to diverse applications, havefascinated chemists from multiple fields.1 While porphyrins havemade in-roads in multiple fields they have received at best minimal attentionin the field of polysiloxane chemistry, in part due to their mutualincompatibilities.2,3Polysiloxanes are a class of inorganic polymers well known for their uniqueproperties including low glass transition temperature, high thermal andoxidative stabilities, high optical transparency and low refractive indices.4 If properly utilized,these properties could compliment those possessed by porphyrins. This talk willexplore the development of synthetic techniques including the Piers-Rubinsztajnreaction, and acid-base chemistry for the reliable and controllableincorporation of porphyrins into polysiloxane materials. Challenges associatedwith overcoming the natural incompatibility of the two materials will bedescribed. Finally, applications of the new materials including dielectricelastomers, singlet oxygen generating elastomers and catalytic elastomers willbe explored.5


References:


1. S. Hiroto, Y.Miyake and H. Shinokubo, Chem. Rev., 2017, 117, 2910–3043. 


2       . Y. Ji, Y. Y. Huang, A. R. Tajbakhsh and E. M. Terentjev, Langmuir,2009, 25, 12325–12331. 


3. E. Tarabukina,E. Fagadar-Cosma, C. Enache, N. Zakharova and M. Birdeanu, J. Macromol. Sci.Part B, 2013, 52, 1092–1106. 


4. M. A. Brook, Siliconin Organic, Organometallic, and Polymer Chemistry, Wiley, 1999. 


5.C. B. Gale, M.A. Brook and A. L. Skov, RSC Adv., 2020, 10, 18477–18486.