Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 28 for “"bridging ligand"”.
-
Synthesis and photophysical investigation of supramolecular complexes developed for photoinitiated electron collection
… of the chromophoric units, [Ru₂(bpy)(BL)]²⁺, the bridging ligand was varied. The dpq bridging ligand was modified through the incorporation of electron donating and electron withdrawing substituents. The 6,7-dimethyl-2,3-bis(2’- pyridyl)quinoxaline and 6,7-chloro-2,3-bis(2’-pyridyl)quinoxaline …
-
The synthesis and characterization of a new kind of tagged Ru-Pt bimetallic DNA binding agent
… as TAG-LA-BL-BAS (TAG = NMR active phosphine ligand, LA = light absorber, BL = bridging ligand and BAS = bioactive site). The TAG provides a NMR probe for the characterization of supramolecular complexes as well as for the future investigation of the metal complex−DNA interaction process. In …
-
Tuning the ground and excited state properties of a series of polymetallic tridentate complexes incorporating Ru(II) or Os(II) as the chromophore
… incorporating the tridentate polypyridyl bridging ligand tpp (where tpp = 2,3,5,6-tetrakis(2-pyridyl)pyrazine) and an investigation of their ground and excited state properties. A series of ruthenium monometallic chromophore complexes has been prepared varying the ligands coordinated on …
-
OCTAHEDRAL METAL CLUSTERS AS MOLECULAR BUILDING BLOCKS OF COORDINATION POLYMERS: SYNTHESIS, CHARACTERIZATION, AND STUDY OF THEIR HOST-GUEST INTERACTIONS
… blocks of coordination polymers. Apical cyanide ligands are used as bridging ligands between the cluster and other molecular building blocks for the preparation of supramolecular assemblies with different dimensions. Using the self-assembly approach, eight new compounds were synthesized and their …
-
Ruthenium-Platinum Polypyridyl Complexes: Synthesis and Characterization
… (tpy = 2,2':6',2"-terpyridine and BL = bridging ligand) and their spectroscopic, electrochemical, and DNA binding properties studied. The bridging ligands used in these complexes were 2,3-bis(2'-pyridyl)pyrazine (dpp), 2,3-bis(2'-pyridyl)quinoxaline (dpq) and …
-
Porphyrins and metalloporphyrins as field-responsive materials
… polymers of metalloporphyrins with non-symmetric bridging ligands have been synthesized as candidates for molecular ferroelectric materials. These include the iron(II) porphyrinate polymer: \lbrack Fe$\sp{\rm II}$(TPP)(pyCN)\rbrack$\sb\infty$ (where TPP = 5,10,15,20-tetraphenylporphyrinate(2$-$); …
-
Development of a room temperature molecular electronics: Direct vs indirect metal complex synthesis
… as a comparison between ‘direct’ (complexes as ligands/complexes as metals) and ‘indirect’ (on-complex) synthesis as a method of metal complex synthesis. Chapter 1 introduces the theory behind molecular electronics and solar energy conversion as well as the applicability of transition metal …
-
Transformations of bridging ligands in diiron complexes: unconventional routes to new functionalized multisite bound organic frames
… has concerned the possible transformations of bridging ligands in diiron complexes, in order to explore unconventional routes to the synthesis of new functionalized multisite bound organic frames. The results achieved during the Ph.D. can be summarized in the following points: 1) We have …
-
Photochemistry of a Series of Weakly Coupled Dinuclear Ruthenium(II) Complexes
… the reaction was investigated in regards to the ligands, bridging ligands, and starting materials. Several ligands were successful in the synthesis, including 2,2’-bipyridine (bpy), 4,4’-dimethyl-2,2’-dipyridyl (dmb), 1,10-phenanthroline (phen), 4,7-diphenyl-1,10-phenanthroline (dpphen), and …
-
Improving Photocatalytic Hydrogen Production of Ru,Rh,Ru Supramolecular Complexes in Aerobic Aqueous Solutions
… of the architecture [{(TL)2Ru(BL)}2RhX2]5+ (BL=bridging ligand, TL=terminal ligand, X=halide) are among the highest reported in deoxygenated organic solvents, but do not function in air-saturated aqueous solution due to quenching of the metal-to-ligand charge transfer (MLCT) excited-state under …
-
The development of inorganic dyes for the application of photocatalytic CO2 reduction
… (I) complexes using various synthetic routes and ligands. The experimental methodology (i.e. the materials, methods and instrumentation) used while conducting this research, is described in Chapter 2. The investigation into the preparation of photocatalysts begins in chapter 3 with the development …
-
Synthesis of heteroaromatic ruthenium dyes for use as electron reservoirs in dye-sensitized solar cells
… The two 4,4’-dicarboxy-2,2’-bipyridine ligands allow strong attachment of the complex to TiO2 and the 2,2’-bipyrimidine ligand allows for additional ruthenium centers to be attached.</p> <p>The third chapter describes the creation of a series of triruthenium complexes. Initially, an …
-
Synthesis, Structures, and Properties of Metal Formates
… containing metal cations connected with organic bridging ligands to form extended structures. The research present in this dissertation investigates the use of short-bridging ligands in constructing dense-MOFs under solvothermal conditions and their applications. In particular, formate, the …
-
Synthesis and Characterization of Crystalline Coordination Networks Constructed From Neutral Imidazole Containing Ligand and Rigid Aromatic Carboxylate
… metal ion with one anionic and one neutral bridging ligand. In the field of crystalline coordination networks, the goal is to synthesize porous 3D crystalline coordination networks with molecular sized cavities. The materials are characterized by XRD and TGA. It is important to understand …
-
The Design, Synthesis and Study of Mixed-Metal Ru,Rh and Os, Rh Complexes with Biologically Relevant Reactivity
… [(TL)2M(dpp)RhCl2(TL)]3 (M = Ru and Os, terminal ligands (TL) = phen, Ph2phen, Me2phen and bpy, terminal ligands (TL) = phen, bpy and Me2bpy ), which couple one Ru or Os polyazine light absorber (LA) to a cis-RhIIICl2 center through a dpp bridging ligand (BL), were synthesized using a building …
-
Tuning the Photophysical and Biological Properties of a Series of Ruthenium-Based Chromophores and Chromophore Coupled Cisplatin Analogs with Substituted Terpyridine Ligands
… and [(TL)RuCl(BL)PtCl₂](PF₆) with the BL (bridging ligand) = 2,3-bis(2-pyridyl)pyrazine (dpp) and varying TL (terminal ligand) (tpy = 2,2'':6'',2''-terpyridine, MePhtpy = 4''-(4-methylphenyl)- 2,2'':6'',2''- terpyridine, or tBu3tpy = 4,4'',4''-tri-tert-butyl-2,2'':6'',2''-terpyridine) have …
-
High-Nuclearity Lanthanide(III) Complexes as Single-Molecule Magnets and Luminescent Materials
The employment of the bridging/chelating Schiff base ligands, N-salicylidene-o-aminophenol (saphH2), N-salicylidene-o-aminocyclohexanol (sachH2) and N-salicylidene-2-amino-5-chlorobenzoic acid (sacbH2), in lanthanide (LnIII) cluster chemistry has afforded four families of polynuclear and dinuclear …
-
Mixed-Metal Ruthenium-Platinum Polyazine Supermolecules: Synthesis, Characterization and Exploration of DNA Binding
… ruthenium light absorbers using the dpq and dpb bridging ligands (where dpq = 2,3-bis(2-pyridyl)quinoxaline, dpb = 2,3-bis(2-pyridyl) benzoquinoxaline). These complexes are potentially bifunctional, capable of DNA intercalation through the bridging ligand and covalent binding to DNA through the …
-
Probing the Redox and Photophysical Properties of Ru(II)-Pt(II) Supramolecular Complexes as Efficient Photodynamic Therapy Agents
… = 4,7-diphenyl-1,10-phenanthroline, and BL (bridging ligand) = dpp = 2,3-bis(2-pyridyl)pyrazine, or dpq = 2,3-bis(2-pyridyl)quinoxaline) structural motif were synthesized and their redox, photophysical, and photochemical properties studied. Subsequently the application of the Ru(II)-Pt(II) …
Page 1 of 2