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Tim Bender

Tim Bender

Academic Title: Associate Professor (Cross Appointed), Chemical Engineering

Phone: 416-978-6140

Office: WB225


Research Homepage: Click here


His new laboratory utilizes a combination of computer aided molecular modeling, synthetic chemistry (polymers and small molecules) and post synthetic characterization pursuing the design, engineering and application of new materials for application in plastic/organic solar cells..

Keywords: Organic electronic materials (polymers and small molecules), organic solar cells, photoactive materials.


Prof. Bender is an established expert in the field of organic electronic materials, specifically in their industrial application to organic photoreceptive devices. As an industrial researcher, he has filed over 65 US Patents and over time has authored or co-authored 17 peer reviewed papers in the fields of organic electronic materials and polymeric structures.

Selected Publications

  • “Systematic Variation of the HOMO and LUMO Energy Levels of Synthetically Accessible Boron Subphthalocyanines: a Molecular Modeling Study” Bender , T.P.; Stanwick, J.; J. Chem. Theory and Comp. , Manuscript in preparation.
  • “A Pronounced Anionic Effect in the Pd-catalyzed Buchwald-Hartwig Amination Revealed in Phosphonium Salt Ionic Liquids”. McNulty, J.; Cheekoori, S.; Bender , T. P. ; Coggan, J.A.; Chem. Eur. J. , 2007 , 1423–1428.
  • “The Synthesis of Poly(arylene ether)s in Solution at Pilot-Plant Scale with Control over Molecular Weight and End-Group Composition”. Bender , T. P. ; Burt, R.A.; Hamer, G.K.; DeVisser, C.; Smith, P. F.; Saban, M.; Org. Process Res. Dev. , 2002 , 6 (5), 714-720.
  • “Effect of Substitution on the Electrochemical and Xerographic Properties of Triarylamines: Correlation to the Hammett Parameter of the Substituent and Calculated HOMO Energy Level”. Bender , T. P. ; Graham, J.F.; Duff, J.M.; Chem. Mater. , 2001 , 13 (11), 4105-4511.

Selected Issued US Patents:

  1. “Silicon-containing layers for electrophotographic photoreceptors and methods for making the same” Bender , T.P.; Hu, N.X.; Graham, J.F.; Gagnon, Y.; Coggan, J.A.; US 7,238,456 . July 3, 2007 . (Description: A hole-transporting crosslinked siloxane network capable of protecting an organic photoreceptive device from environmental degradation.)
  2. “Process for arylamine production” Bender , T.P.; Coggan, J.; US 7,227,034 . June 5, 2007 . (Description: an industrially practical method for the synthesis of a functionalized arylamine compounds capable of participating in sol-gel chemistry.)
  3. “Polycarbonates and photoconductive imaging members” Bender , T. P. ; Goodbrand, H.B.; US 7,144,971 . December 5, 2006 . (Description: A method for the synthesis of a polycarbonate capable of thermal curing having controlled molecular weight and molecular weight distribution.)
  4. “Photoconductive imaging members” Bender , T. P. ; Graham, J. F.; Hor, A. M.; Junginger, J.; US 7,070,894 . July 4, 2006 . (Description: A method for the synthesis and use of branched polysiloxane copolymers by sol-gel processing and their use as an electrically conductive layer in an organic photoreceptor.)
  5. “Imaging Members” Bender , T. P. ; Graham, J. F.; Duff, J. M.; Ioannidis, A.; Belknap, N. L.; US 7,070,892 . July 4, 2006 . (Description: The design and use of a proprietary electron-transporting material and its use in a single layer photoreceptor design.)
  6. “Process for preparing branched polyarylene ethers” Bender , T. P. ; US 7,067,608 . June 27, 2006 . (Description: A novel method for the production of branched and hyperbranch poly(arylene ether)s by depolymerization of a liner polymer via an entropically driven reaction with a salt of a polyphenolic compound.)
  7. “Naphthalene tetracarboxylic diimide dimmers” Bender , T. P. ; Grahm, J.F.; Duff, J.M.; US 7,011,916 . March 14, 2006 . (Description: A divisional patent protecting specific compositions of naphthalene tetracarboxylic diimide dimmers as electron-transporting materials found to be of particular usefulness).
  8. “Blue diode laser sensitive photoreceptor“ Bender , T. P. ; Graham, J.F.; US 6,969,573 . November 29, 2005 . (Description: A patent protecting the composition of a particular class of triarylamines found to have comparable performance and equivalent xerographic properties to the more common benzidine based arylamine compound TPD. These compounds are advantageous since they are transparent in the blue region (400 nm) of the electromagnetic spectrum.)
  9. “Naphthalene tetracarboxylic diimide dimers" Bender , T. P. ; Graham, J.F.; Duff, J.M.; US 6,794,102 , September 21, 2004 . (Description: A novel class of compounds comprising two chemically link naphthalene tetracarboxylic diimide units. These compounds were found to have unique electrochemical and electron-transporting properties. This broad umbrella patent claims and protects the entire class of compounds/composition of matter.)
  10. “Process for preparing polyarylene ethers”. Bender , T. P. ; DeVisser, C.J.; Burt, R.A.; Smith, P. F.; Saban, M.D.; US 6,716,956 . April 6, 2004 . (Description: A novel process for preparing poly(arylene ether)s of controlled molecular weight and tight polydispersity at a pilot plant scale.)
  11. “Photoconductive Members”. Bender , T. P. ; Duff, J.M.; Vong, C.; Hamer, G.; US 6,656,651 . December 2, 2003 . (Description: A novel class of compounds comprising chemically link naphthalene and perylene units. These compounds were found to have unique abilities to photogenerate electrical charge under irradiation with a 400 nm laser via energy transfer from the naphthalene to the perylene chromaphore followed by charge separation. This broad umbrella patent claims and protects the entire class of compounds/composition of matter.)
  12. “Imaging members”. Graham, J. F.; Bender , T. P. ; Lin, L.B.; Ioannidis; A.; US 6,586,148 . July 1, 2003 . (Description: A patent protecting the composition, materials package and device configuration of a dual-layer organic photoreceptive device.)