Browsing by Author "Patrickios, Costas S."

Article

2-(Pyridin-2-yl)ethanol as a protecting group for carboxylic acids: Chemical and thermal cleavage, and conversion of poly[2-(pyridin-2-yl)ethyl methacrylate] to poly(methacrylic acid)

Elladiou, Marios; Patrickios, Costas S. (2012)

In this communication, we show that 2-(pyridin-2-yl)ethanol is a good protecting group for methacrylic acid (MAA), which can be selectively removed, after polymerization, either chemically under alkaline conditions or ...

Article

4-(Hydroxymethyl)pyridine and pyrimidine in manganese benzoate chemistry: Preparation and characterization of hexanuclear clusters featuring the { Mn4II Mn2III ( μ4 - O )2 }10 + core

Stamatatos, Theocharis C.; Foguet-Albiol, D.; Perlepes, Spyros P.; Raptopoulou, Catherine P.; Terzis, Aris; Patrickios, Costas S.; Christou, George; Tasiopoulos, Anastasios J. (2006)

The use of 4-(hydroxymethyl)pyridine (4hmpH) and pyrimidine (pym) in manganese benzoate chemistry has been investigated. The reactions of 4hmpH and pym with Mn(O2CPh)2 · 2H2O in MeCN affords the complexes [Mn6O2(O2CPh)10(4hmpH) ...

Article

ABA triblock copolymer-based model networks in the bulk: Effect of the number of arms on microphase behavior

Karbarz, M.; Stojek, Z.; Patrickios, Costas S. (2005)

The microphase separation behavior in the strong segregation limit of model networks based on cross-linked ABA triblock copolymers in the bulk was investigated by calculating analytically the Gibbs free energies of the ...

Article

ABC triblock polymethacrylates: Group transfer polymerization synthesis of the ABC, ACB, and BAC topological isomers and solution characterization

Patrickios, Costas S.; Lowe, A. B.; Armes, S. P.; Billingham, N. C. (1998)

ABC triblock copolymers of methyl methacrylate (MMA), (dimethylamino)-ethyl methacrylate (DMAEMA), and tetrahydropyranyl methacrylate (THPMA) consisting of 12 units of each type of monomer were synthesized by group transfer ...

Article

ABC Triblock Terpolymers with Orthogonally Deprotectable Blocks: Synthesis, Characterization, and Deprotection

Elladiou, Marios; Patrickios, Costas S. (2015)

The development and availability of new protecting groups are vital for all branches of synthetic chemistry. Equally vital is the facile and selective removal of these groups, leaving intact other protecting groups which ...

Article

Alcoholysis/hydrolysis of 1,1′-carbonyldiimidazole as a means of preparing unprecedented, imidazole-containing one-dimensional coordination polymers of copper(II)

Stamatatos, Theocharis C.; Perlepes, Spyros P.; Raptopoulou, Catherine P.; Terzis, Aris; Patrickios, Costas S.; Tasiopoulos, Anastasios J.; Boudalis, Athanassios K. (2009)

The use of 1,1′-carbonyldiimidazole, (im)2CO, for the synthesis of imidazolate (im-) and/or imidazole (Him)-containing copper(II) coordination polymers is described. The [Cu2(O 2CMe)4(H2O)2]/(im)2CO reaction system in EtOH ...

Article

Alternating amphiphilic multiblock copolymers: Controlled synthesis via RAFT polymerization and aqueous solution characterization

Hadjiantoniou, Natalie A.; Krasia‐Christoforou, Theodora; Loizou, Elena; Porcar, L.; Patrickios, Costas S. (2010)

Four linear amphiphilic multiblock copolymers based on 2-(dimethylamino) ethyl methacrylate (DMAEMA, hydrophilic) and methyl methacrylate (MMA, hydrophobic), bearing from two to five blocks, were synthesized using reversible ...

Article

Amphiphilic diblock and ABC triblock methacrylate copolymers: Synthesis and aqueous solution characterization

Triftaridou, Aggeliki I.; Vamvakaki, Maria; Patrickios, Costas S. (2002)

Three isomeric, linear, equimolar, amphiphilic ABC triblock copolymers comprising methyl methacrylate (MMA, nonionic hydrophobic), 2-(dimethylamino)ethyl methacrylate, (DMAEMA, ionizable hydrophilic) and hexa(ethylene ...

Article

Amphiphilic model conetworks based on combinations of methacrylate, acrylate, and styrenic units: Synthesis by RAFT radical polymerization and characterization of the swelling behavior

Achilleos, Mariliz; Krasia‐Christoforou, Theodora; Patrickios, Costas S. (2007)

Reversible addition-fragmentation chain transfer (RAFT) polymerization was employed for the preparation of homopolymer and copolymer (co)networks based on four monomer units, belonging to three monomer types: methacrylates, ...

Article

Amphiphilic model conetworks based on cross-linked star copolymers of benzyl methacrylate and 2-(dimenthylamino)ethyl methacrylate: Synthesis, characterization, and DNA adsorption studies

Achilleos, Demetra S.; Georgiou, Theoni K.; Patrickios, Costas S. (2006)

Six amphiphilic model conetworks of a new structure, that of cross-linked "in-out" star copolymers, were synthesized by the group transfer polymerization (GTP) of the hydrophobic monomer benzyl methacrylate (BzMA) and the ...

Article

Amphiphilic model conetworks of polyisobutylene methacrylate and 2-(dimethylamino)ethyl methacrylate prepared by the combination of quasiliving carbocationic and group transfer polymerizations

Georgiou, Theoni K.; Patrickios, Costas S.; Groh, P. W.; Iván, B. (2007)

A series of amphiphilic polymer conetworks (APCN) of the hydrophobic polyisobutylene methacrylate macromonomer (PIBMA) and the ionizable hydrophilic 2-(dimethylamino)ethyl methacrylate (DMAEMA) were synthesized by combining, ...

Article

Amphiphilic networks based on cross-linked star polymers: A small-angle neutron scattering study

Vamvakaki, Maria; Patrickios, Costas S.; Lindner, P.; Gradzielski, M. (2007)

Four different polymer model networks of identical molecular architecture based on cross-linked stars (CLSs) were investigated by small-angle neutron scattering (SANS). One of the model networks was a hydrophilic homopolymer ...

Article

Amphiphilic Polymer Conetworks Based on End-Linked "core-First" Star Block Copolymers: Structure Formation with Long-Range Order

Kepola, Eleni J.; Loizou, Elena; Patrickios, Costas S.; Leontidis, Epameinondas; Voutouri, Chrysovalantis; Stylianopoulos, Triantafyllos; Schweins, R.; Gradzielski, M.; Krumm, C.; Tiller, J. C.; Kushnir, M.; Wesdemiotis, Chrystostomos (2015)

Amphiphilic polymer conetworks are cross-linked polymers that swell both in water and in organic solvents and can phase separate on the nanoscale in the bulk or in selective solvents. To date, however, this phase separation ...

Article

Amphiphilic Polymer Conetworks Based on Interconnected Hydrophobic Star Block Copolymers: Synthesis and Characterization

Kepola, Eleni J.; Kyriacou, Kyriacos C.; Patrickios, Costas S.; Simon, Miriam; Gradzielski, M.; Kushnir, M.; Wesdemiotis, Chrystostomos (2017)

Herein we report on the preparation and structural characterization of six amphiphilic polymer conetworks (APCN) based on end-linked amphiphilic “core-first” star block copolymers, comprising methyl methacrylate and ...

Article

Amphiphilic polymethacrylate model co-networks: Synthesis by RAFT radical polymerization and characterization of the swelling behavior

Krasia‐Christoforou, Theodora; Patrickios, Costas S. (2006)

Reversible addition-fragmentation chain transfer (RAFT) controlled radical polymerization was employed, for the first time, to prepare well-defined (model) amphiphilic polymer co-networks based on n-butyl methacrylate ...

Article

Amphiphilic single and double networks: a small-angle X-ray scattering investigation

Zhang, X. K.; Kyriakos, K.; Rikkou-Kalourkoti, Maria D.; Kitiri, E. N.; Patrickios, Costas S.; Papadakis, Christine M. (2016)

We investigated the microphase-separated morphologies of water-swollen amphiphilic single and double polymer networks using small-angle X-ray scattering (SAXS). The networks consist of (i) a first conetwork containing ...

Article

Anionic amphiphilic end-linked conetworks by the combination of quasiliving carbocationic and group transfer polymerizations

Kali, Gergely; Georgiou, Theoni K.; Iván, B.; Patrickios, Costas S. (2009)

A series of amphiphilic end-linked conetworks was synthesized by the combination of two "quasiliving" polymerization techniques, quasiliving carbocationic (QLCCP) and group transfer polymerizations (GTP). The hydrophobic ...

Article

Aqueous size exclusion chromatography of random, diblock, and ABC triblock methacrylic polyampholytes

Patrickios, Costas S.; Strittmatter, J. A.; Hertler, Walter R.; Hatton, T. Alan (1996)

Aqueous size exclusion chromatography (SEC) at 1 M KCl and pH 8.5 was employed to probe the aggregation behavior of methacrylic polyampholytes. In agreement with earlier results obtained by light scattering techniques, ...

Article

Benzene oligocarboxylic acids: Characterization by isocratic, linear gradient, and frontal anion-exchange chromatography

Li, H.; Lue, L.; Patrickios, Costas S. (1999)

A series of nine benzene oligocarboxylic acids is characterized using anion-exchange chromalography to determine the steric mass-action affinity parameters: the characteristic charge, the equilibrium ion-exchange constant ...

Article

Binding of sodium dodecyl sulfate to linear and star homopolymers of the nonionic poly(methoxyhexa(ethylene glycol) methacrylate) and the polycation poly(2-(dimethylamino)ethyl methacrylate): Electromotive force, isothermal titration calorimetry, surface tension, and small-angle neutron scattering measurements

Couderc-Azouani, S.; Sidhu, J.; Georgiou, Theoni K.; Charalambous, Despina C.; Vamvakaki, Maria; Patrickios, Costas S.; Bloor, D. M.; Penfold, J.; Holzwarth, J. F.; Wyn-Jones, E. (2004)

The process of binding of sodium dodecyl sulfate (SDS) to various linear and star polymers of the nonionic methoxyhexa(ethylene glycol) methacrylate (PMHEGMA) and the ionic 2-(dimethylamino)ethyl methacrylate (PDMAEMA) was ...