Design and synthesis of functional molecular squares

Akpınar, Handan
Self-assembly has big importance in synthesizing supramolecular structures. Highly fluorescent molecular squares with boradiazaindacene (BODIPY) building blocks were obtained via usage of metal driven self-asembly. The boradiazaindacene units were connected with the Pd(II) complex unit enforcing a near-90 degree angle between the building blocks. Thus, we believe we have the first example of BODIPY carrying fluorescent squares. With collective experience in BODIPY chemistry in our group, we may have the first example of functionalizable molecular square. Self-assembled light harvesting systems will be ultimate biomimetic example of photosynthetic reaction center.


Development of acyl anion precursors and their applications
Reis, Ömer; Demir, Ayhan Sıtkı; Department of Chemistry (2005)
This thesis presents the development of new acyl anion precursors and their applications. The main concern of this thesis was to make use of acyl anion precursors in catalytic bond forming reactions. Toward this aim, previously known cyanide ion catalyzed cleavage of benzils was investigated in scope and efficiency in unsymmetrical benzoin condensation. Although benzils were proved to be useful entities as acyl anion precursors in benzoin condensation, they suffer some major drawbacks. Therefore acylphospho...
Chemoenzymatic synthesis of chiral hydroxymethyl cycloalkenols
Şenocak, Deniz; Demir, Ayhan Sıtkı; Department of Chemistry (2004)
Chiral cyclic alkenols with hydroxymethyl functionality are important structural units in many biologically active natural compouds such as prostaglandins, sesquiterpene antiviral agents, pentenomycins, xanthocidin, sarkomycin, etc. 1,3-cycloalkanediones are converted into bicyclic polyoxo derivatives with formaldehyde and trioxane in the presence of Lewis acid. Selective oxidation of the bicyclic compounds by using manganese(III)acetate followed by enzyme-catalyzed kinetic resolution afforded chiral bicycl...
Theoretical approach to the structural, electronic, and morphological properties of poly(E >-caprolactone) grafted polypyrroles
Yıldırım, Erol; Yurtsever, Mine (Springer Science and Business Media LLC, 2013-09-01)
Poly(E >-caprolactone) grafted polypyrroles (PPy-g-PCL) are an important member of hairy-rod copolymers which have many industrial applications. PPy-g-PCL cooligomers were studied for their electronic, structural and morphological properties by density functional theory (DFT), molecular dynamics and mesoscale dynamics simulation methods. The band gaps of the cooligomers were calculated at the B3LYP/6-31g(d,p) level by varying the grafting position of PCL group. UV spectra was studied by time-dependent DFT m...
Manganese(iii)acetate-based free-radical additions of -dicarbonyl compounds to bicyclic systems
Fedalla, Mohammad Ali; Balcı, Metin; Department of Chemistry (2007)
Additions of carbon-centered radicals to alkenes are useful method for cyclic compounds formation. Manganese(III)-based oxidative free-radical cyclizations, where the radicals are generated and terminated oxidatively, are established as efficient methods for the construction of cyclic molecule. Treatment of a mixture of dimedone, Mn(OAc)3, and Cu(OAc)2 in glacial acetic acid with homobenzonorbornadiene (80) (4h at 50 C) gave furan derivative (107), dihydrofuran adduct (108), in addition to rearranged produc...
Enantioselective Michael Addition of Nitroalkanes to Nitroalkenes Catalyzed by Chiral Bifunctional Quinine-Based Squaramides
Kanberoğlu, Esra; Tanyeli, Cihangir (Wiley, 2015-10-26)
A family of chiral bifunctional acid-/base-type quinine/squaramide organocatalysts is shown to be highly active promoters of the conjugate addition of 1-nitropropane to various trans-β-nitroalkenes. The cooperation of the quinine and the sterically encumbered squaramide moieties catalyzed the Michael addition reactions at 0 °C by using a catalyst loading of only 2 mol % to afford the 1,3-dinitro Michael adducts with excellent enantioselectivity and diastereoselectivity (up to 95 % ee and syn/anti isomers
Citation Formats
H. Akpınar, “Design and synthesis of functional molecular squares,” M.S. - Master of Science, Middle East Technical University, 2006.