Efficient energy transfer in cofacial boradiazaindacene (BODIPY) dyes built on a xanthane scaffold as a model for early steps in photosynthesis

Dinç, Tarık
Energy transfer is a natural phenomena that bases of the photosynthesis. In photosynthesis, chlorophyls and auxlary absorbing dyes units absorb solar energy and transfer the energy to the reaction center where other chemical reactions occur. Studies showed that energy transfer depends strongly on distance and rigidy of the structure. Rigid structures that close in space transfer energy nearly %100 efficiency. Supramolecular chemistry tries to mimic nature and miniurize natural phenomence on to molecular scale. Thus, articifial photosynthesis has been very popular in supramolecular chemistry. A lot of studies have been dedicated to diffent parts of photosynthesis. BODIPY dyes have very well defined photophysical properties that can be used in multichromic systems and designing molecular switching potential tool on in supramolecular chemistry. In this study extended BODIPY dyes constructed on a rigid xanthane scaffold have been deviced for energy transfer.


Biochemical and genetic studies on the pyruvate branch point enzymes of rhizopus oryzae
Açar, Şeyda; Hamamcı, Haluk; Department of Biotechnology (2004)
Rhizopus oryzae is a filamentous fungi which produces lactic acid and ethanol in fermentations. R. oryzae has numerous advantages for use industrial production of L-(+)-lactic acid but the yield of lactic acid produced on the basis of carbon consumed is low. Metabolic flux analysis of R. oryzae has shown that most of the pyruvate produced at the end of the glycolysis is channelled to ethanol, acetyl-CoA and oxaloacetate production. This study aimed to answer some questions addressed on the regulation of pyr...
KOCABIVIK, S; PERLIN, MH (Elsevier BV, 1994-01-01)
1. Oligonucleotide-directed mutagenesis of APH(3')-II was used to investigate the functions of key amino acids in the P-loop analogous motif of the enzyme. 2. The mutations of Gly205 --> GIu, Gly210 --> Ala and Arg211 --> Pro considerably reduced the resistance of the resulting strains to KM and to related drugs, e.g. G418. 3. Similarly, enzyme activity in the crude extracts of these mutants was substantially reduced as well as the enzyme's affinity for Mg2+ ATP. 4. Alternatively substitutions at a highly c...
OZBELGE, TA; SOMER, TG (Elsevier BV, 1994-08-01)
Heat transfer from a solid surface to a fluid-solid suspension in vertical or horizontal transport is of importance in the design of heat-exchangers, driers, fluidized beds, and slurry pipeline reactors. There are fewer studies on heat transfer in liquid-solid flows than on gas-solid flows. In this paper, a correlation for heat transfer to dilute liquid-solid flows in a horizontal pipe is presented. Suspension properties were used to derive the following equation: Nu(s) = 0.202Res0.6Prs0.675(D/d(p))0.092(mu...
Antioxidant enzyme activities in rat liver tissues of diabetic rats
Sadi, Gökhan; Güray, Tülin; Department of Biochemistry (2004)
Free radicals are the compounds having one or more unpaired electrons in their outer orbital and this unpaired electron make these compounds very reactive. Especially as their concentration increases, they initiate a chain oxidation reaction of lipids, proteins and nucleic acids. The condition, in which the production of free radicals exceeds their elimination or tissue defense mechanism decrease against them or both occur together, is called oxidative stress. In diabetes mellitus which is a glucose metabol...
Determination of trace elements in marine plankton by inductively coupled plasma mass spectrometry (ICP-MS)
Arslan, Z; Ertas, N; Tyson, JF; Uden, PC; Denoyer, ER (Springer Science and Business Media LLC, 2000-02-01)
A method has been developed for the determination of 23 elements in marine plankton in which inductively coupled plasma (ICP) source mass spectrometry (MS) was used to quantify the elements in the solution after digestion in a mixture of hydrofluoric and nitric acids in sealed PTFE vessels in a microwave field. The procedure was validated by the analysis of a standard reference soil (SRM 2709 San Joaquin Soil) and a standard reference fresh water plankton (CRM 414). The method was applied to the analysis of...
Citation Formats
T. Dinç, “Efficient energy transfer in cofacial boradiazaindacene (BODIPY) dyes built on a xanthane scaffold as a model for early steps in photosynthesis,” M.S. - Master of Science, Middle East Technical University, 2006.