• New publication in Chemical Communications

    "Effects of heteroatom substitution in conjugated heterocyclic compounds on photovoltaic performance: from sulfur to tellurium"

    Y. S. ParkT. S. KaleC.-Y. NamD. Choi and R. B. Grubbs*

    Chem. Commun., 2014, Advance Article

    (Received 12 Mar 2014, Accepted 30 Apr 2014; First published online 01 May 2014)

     We report a general strategy for fine-tuning the bandgap of donor–acceptor–donor based organic molecules by modulating the electron-donating ability of the donor moiety by changing the benzochalcogenophene donor groups from benzothiophenes to benzoselenophenes to benzotellurophenes. These molecules show red-shifts in absorption and external quantum efficiency maxima from sulfur to selenium to tellurium. In bulk heterojunction solar cell devices, the benzoselenophene derivative shows a power conversion efficiency as high as 5.8% with PC61BM as the electron acceptor.  Graphical abstract: Effects of heteroatom substitution in conjugated heterocyclic compounds on photovoltaic performance: from sulfur to tellurium

    Posted Jun 19, 2014, 12:59 PM by Robert Grubbs
  • Spring 2014 Graduates
    Congratulations to Menglan Jiang (MS), Bin Qian (MS), and Rui Yang (PhD)!
    From left: Zhe Sun, Bin Qian, Althea Grubbs-Aubrecht, Barney Grubbs, Menglan Jiang, Tianyuan Wu, Bingyin Jiang
    Group Graduation Dinner at Luso Restaurant.

    Posted Jun 19, 2014, 12:35 PM by Robert Grubbs
  • Spring 2014 Group Meeting Schedule
    All meetings will be held from 10-11:30 am on Wednesdays in Chemistry 515 (except 2/19 meeting, which will be held in 703).

    Research  Literature
    2/19 Jiang B Kim
    2/26 Wu Jiang M
    3/5 Sun Qian
    3/12 Yang Hewitt
    3/19 No meeting ACS mtg
    3/26 Yi Shih
    4/2 Choi Li
    4/9 Kim Jiang B
    4/16 Qian Wu
    4/23 Jiang M Sun
    4/30 Hewitt Yang
    5/7 Shih/Li Yi
    5/14 Yu/Zhou Choi
    Posted Feb 11, 2014, 10:03 AM by Robert Grubbs
  • New Chem Soc Rev Publication
    A review article on stimuli-responsive polymer assemblies with Zhe Sun as a co-author:

    Robert B. Grubbs  and  Zhe Sun, "Shape-changing polymer assemblies," Chem. Soc. Rev. 2013, Advance Article DOI: 10.1039/C3CS60079C

    A panoply of stimuli-sensitive polymorphic polymer assemblies has been constructed through the intentional synthesis of amphiphilic block copolymers comprising hydrophilic, stimulus-responsive, and hydrophobic blocks. Transformations among canonical micellar forms of polymer assemblies—spherical micelles, wormlike micelles, and vesicles (polymersomes)—have been demonstrated with a number of synthetic systems. This review discusses recent progress in the development and understanding of these systems with a focus on open questions about kinetics of shape change, effects of block copolymer architecture on the rate and nature of the transformation, and potential applications.

    Graphical abstract: Shape-changing polymer assemblies
    Posted Jun 26, 2013, 6:23 AM by Robert Grubbs
  • Summer Symposium on Supramolecular Materials (S3M) at Stony Brook
    Prof. Nancy Goroff has organized a special symposium on supramolecular materials in the Chemistry Department at Stony Brook on Friday, July 5th.

    Dario Bassani (Bordeaux)
    Barney Grubbs (Stony Brook)
    Yoshito Tobe (Osaka)
    Marcus Weck (NYU)

    Contributed posters are welcome and lunch will be provided to attendees.
    For more information, please see the flyer or contact
    Posted Jun 3, 2013, 11:02 AM by Robert Grubbs
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