A5021875316- biodegradable polymer synthesis and properties
- Advanced Polymer Synthesis and Characterization
- Organometallic Complex Synthesis and Catalysis
- Synthetic Organic Chemistry Methods
- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Thermal and Kinetic Analysis
- Metal complexes synthesis and properties
- Polymer Nanocomposites and Properties
- Synthesis and properties of polymers
- Carbon dioxide utilization in catalysis
- Aerogels and thermal insulation
- Silicone and Siloxane Chemistry
- Radioactive element chemistry and processing
- Polymer Surface Interaction Studies
- Synthesis and Properties of Aromatic Compounds
- Metalloenzymes and iron-sulfur proteins
- Supercapacitor Materials and Fabrication
- Bone Tissue Engineering Materials
- Electrospun Nanofibers in Biomedical Applications
- Organometallic Compounds Synthesis and Characterization
- Magnetism in coordination complexes
- Asymmetric Hydrogenation and Catalysis
- Ferrocene Chemistry and Applications
- Supramolecular Chemistry and Complexes
National and Kapodistrian University of Athens
2015-2024
Abstract Statistical and block copolymers of n ‐hexyl isocyanate (HIC) 2‐chloroethyl (ClEtIC) were synthesized via cοοrdination polymerization employing the half‐titanocene complex [( η 5 ‐C H )(( S )‐2‐Bu‐O)TiCl 2 ] as initiator. The complex, bearing a chiral substituent, led to optically active products, confirmed by circular dichroism measurements. molecular characterization all products was carried out NMR IR spectroscopy size exclusion chromatography (SEC), while their thermal stability...
ABSTRACT We report the synthesis of novel half‐titanocene alkoxide complex bischloro‐ η 5 ‐cyclopentadienyl(bicyclo[2.2.1]‐hept‐5‐en‐2‐oxy) titanium (IV), [CpTiCl 2 (O‐NBE)]. This was employed for chiral poly( l ‐lactide‐ b ‐hexyl isocyanate) diblock copolymer bearing a norbornene end group with sequential addition monomers. The poly(hexyl block is due to last ‐lactide unit ‐lactide) block. macromonomer polymerized towards polymer brush structure polynorbornene backbone and side chains using...
ABSTRACT A new chiral half‐titanocene complex, [CpTiCl 2 (O‐(S)−2‐Bu)], is synthesized and characterized by 1 H 13 C NMR spectroscopy. This complex employed for the coordination polymerization of n ‐butyl ‐hexyl‐ isocyanate leading to polymers, as revealed their CD spectra. Only left‐handed helix produced, due (S)−2‐butoxy group, which bound polymer chain end. The 3‐(triethoxysilyl)propyl produces less soluble polymers. On other hand, phenyl reacts slowly with quantitatively selectively...
ABSTRACT We report the synthesis of poly( l ‐lactide) and poly(hexyl isocyanate) macromonomers using bischloro‐ η 5 ‐cyclopentadienyl(bicyclo[2.2.1]‐hept‐5‐en‐2‐oxy) Titanium (IV), [CpTiCl 2 (O‐NBE)]. These bearing a norbornene end group were polymerized towards brush copolymers employing Grubbs' first generation catalyst. Brush consisting blocks with different side chains synthesized. The polymers characterized by Size Exclusion Chromatography, Nuclear Magnetic Resonance, their thermal...
The cationic statistical copolymerization of n-butyl (be) and 2-chloroethyl vinyl ether (CEVE), is efficiently conducted using bis(η5-cyclopentadienyl)dimethyl zirconium (Cp2ZrMe2) in combination with tetrakis(pentafluorophenyl)borate dimethylanilinum salt [B(C6F5)4]-[Me2NHPh]+, as an initiation system. reactivity ratios are calculated both linear graphical non-linear methods. Structural parameters the copolymers obtained by calculating dyad sequence fractions mean length, which derived...
The synthesis and characterization of the tetrathiomolybdatorhodium(I) monoanionic complexes [L2Rh(μ-S)2MoS2](-) (L = CO (3), P(OPh)3 (4), P(O-o-Tol)3 (P(o-CH3C6H4)3; 5), P(OMe)3 (6), P(OEt)3 (7), P(O-i-Pr)3 (8); L2 COD (1,5-cyclooctadiene; 2), cis-dppen (cis-Ph2PCH═CHPPh2; 9), dppe (Ph2PCH2CH2PPh2; 10), dppb (Ph2P(CH2)4PPh2; 11)) is presented. complex 2 (NEt4(+) salt) was characterized by X-ray diffraction analysis. A detailed DFT study electronic structures 2-4 6-8 has revealed existence...
Well-defined statistical copolymers of n-hexyl isocyanate, HIC, and 3-(triethoxysilyl)propyl TESPI, were synthesized via coordination polymerization mechanism, employing a chiral half-titanocene complex as initiator. The monomer reactivity ratios the calculated using linear graphical methods computer program COPOINT in frame terminal model. molecular structural characteristics also calculated. kinetics thermal decomposition was studied by Thermogravimetric Analysis, TGA, Differential...
ABSTRACT Seven (half‐)titanocene alkoxide complexes, [Cp 2 TiCl(OEt)], TiCl(O‐2‐Bu)], TiCl(OCH CF H)], [CpTiCl (OEt)], (O‐( S )‐2‐Bu)], (OCH 3 )], and were synthesized employed in lactide coordination polymerization. These organotitanium (IV) compounds proved to be very efficient initiators for the ring‐opening polymerization of enantiomeric l ‐lactide racemic mixture rac ‐lactide, leading end‐functionalized polymers. Kinetic studies illustrated that these produce well‐defined polymers a...
Abstract A series of well‐defined poly{ dl ‐lactide‐ b ‐[oligo(ethylene glycol) methyl ether (meth)acrylate)]} (PDLLA‐ ‐POEG[M]A) functional amphiphilic diblock copolymers was synthesized by employing a multistep procedure involving: (a) ring‐opening polymerization ‐lactide using n ‐decanol and stannous octoate as the initiating system, (b) esterification reaction PDLLA hydroxyl end groups with 2‐bromoisobutyryl bromide, (c) atom transfer radical OEG(M)A newly created bromoisobutyryl site,...
Periodontitis is a microbially-induced inflammation of the periodontium that characterized by destruction periodontal ligament (PDL) and alveolar bone constitutes principal cause teeth loss in adults. Periodontal tissue regeneration can be achieved through guided tissue/bone (GTR/GBR) membranes act as physical barrier preventing epithelial infiltration providing adequate time space for PDL cells osteoblasts to proliferate into affected area. Electrospun nanofibrous scaffolds, simulating...
Τhis work describes the synthesis of PLA-grafted M-alginate (g-M-alginate; M: Ca2+, Co2+, Ni2+, Cu2+) aerogels. DL-lactide (LA) was attached on surface preformed beads and polymerized, using stannous octoate as catalyst –OH groups alginate backbone initiators/points attachment. The material properties g-M-alginate aerogels were not affected much by grafting, because linear PLA chains grew framework like a brush did bridge their points attachment in polyurea-crosslinked Thus, all retained...