Worcester Polytechnic Institute Electronic Theses and Dissertations Collection

Title page for ETD etd-090308-093207


Document Typethesis
Author NameLee, Lisa S
URNetd-090308-093207
TitleDesign of porous solids from 2-D and 3-D coordination frameworks utilizing imidazolylbenzoic acids and esters
DegreeMS
DepartmentChemistry & Biochemistry
Advisors
  • John C. MacDonald, Advisor
  • Kristin K. Wobbe, Department Head
  • Keywords
  • metal organic frameworks
  • Date of Presentation/Defense2008-08-07
    Availability unrestricted

    Abstract

    The investigation through design and synthesis of metal-organic frameworks was conducted in an effort to create new types of porous crystalline solids. The supramolecular chemistry and crystal structures of six novel frameworks (1-Cd, 2Cd, 1-Cu, 2a-Cu, 2b-Cu, 3-Cu) are reported. We are targeting porous solids composed of the transition metals Cu2+ and Cd2+ with three related families of organic molecules: Ethyl 4-(1H-imidazol-1-yl)benzoate, 4-(1H-benzo[d]imidazol-1-yl)benzoic acid, and Ethyl 4-(2-methyl-1H-imidazol-1-yl)benzoate. These molecular building blocks self assemble via metal coordination into coordination polymers that form a variety of 1-D, 2-D, and 3-D architectures. The networks are comprised of M•••O and M•••N bonds that coordinate into different geometrical arrangements dependent on steric hindrance and the metal ions that are used. The frameworks synthesized display porous behavior using weight measurements that are also seen to be reversible in some cases using atmospheric reuptake of guest molecules from growth solution. The uptake of rhodamine b was examined for the framework 3-Cu.

    Files
  • llee.pdf

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