Water-Soluble Perylene Diimides:  Solution Photophysics and Layer-by-Layer Incorporation into Polyelectrolyte Films

Langmuir ◽  
2006 ◽  
Vol 22 (18) ◽  
pp. 7610-7616 ◽  
Author(s):  
Tingji Tang ◽  
Jianqiang Qu ◽  
Klaus Müllen ◽  
Stephen E. Webber
Keyword(s):  
Water Soluble ◽  
Layer By Layer ◽  
Perylene Diimides

scholarly journals Energy Transfer in Molecular Layer-by-Layer Films of Water-Soluble Perylene Diimides

Langmuir ◽  
2007 ◽  
Vol 23 (8) ◽  
pp. 4623-4628 ◽  
Author(s):  
Tingji Tang ◽  
Andreas Herrmann ◽  
Kalina Peneva ◽  
Klaus Müllen ◽  
Stephen E. Webber
Keyword(s):  
Energy Transfer ◽  
Molecular Layer ◽  
Water Soluble ◽  
Layer By Layer ◽  
Perylene Diimides

Molecular Layer-by-Layer Self-Assembly of Water-Soluble Perylene Diimides through π−π and Electrostatic Interactions

Langmuir ◽  
2006 ◽  
Vol 22 (1) ◽  
pp. 26-28 ◽  
Author(s):  
Tingji Tang ◽  
Jiangqiang Qu ◽  
Klaus Müllen ◽  
Stephen E. Webber
Keyword(s):  
Self Assembly ◽  
Electrostatic Interactions ◽  
Molecular Layer ◽  
Water Soluble ◽  
Layer By Layer ◽  
Perylene Diimides

Fabrication and Conductive Properties of Multilayered Ultrathin Films Designed by Layer-by-Layer Assembly of Water-Soluble Fullerenes

Langmuir ◽  
2010 ◽  
Vol 26 (16) ◽  
pp. 13472-13478 ◽  
Author(s):  
Kohji Masuda ◽  
Takefumi Abe ◽  
Hiroaki Benten ◽  
Hideo Ohkita ◽  
Shinzaburo Ito
Keyword(s):  
Ultrathin Films ◽  
Water Soluble ◽  
Layer By Layer ◽  
Layer By Layer Assembly ◽  
Conductive Properties ◽  
Layer Assembly

Catalytic Oxidation of NADH on Gold Electrode Modified by Layer-by- Layer Self-Assembly of Thermostable Diaphorase and Redox Polymer

2011 ◽  
Vol 675-677 ◽  
pp. 231-234 ◽  
Author(s):  
Wen Juan Zheng ◽  
Hai Tao Zheng ◽  
Tao Sun ◽  
Pu Liu ◽  
Shinichiro Suye
Keyword(s):  
Self Assembly ◽  
Multilayer Structure ◽  
Gold Electrode ◽  
Multilayer Film ◽  
Water Soluble ◽  
Current Response ◽  
Layer By Layer ◽  
Redox Polymer ◽  
Relative Response ◽  
Reduced Nicotinamide Adenine Dinucleotide

A redox polymer, poly(ethylenimine)ferrocene (PEI-Fc) was synthesized by attaching ferrocene groups to the backbone of water soluble poly(ethylenimine), and multilayer film in nanoscale was assembled on gold electrode by alternate layer-by-layer adsorption (LBL) of the positively charged PEI-Fc and the negatively charged thermostable diaphorase (DI) from B.Stearothermophilus. The LBL process was monitored and analyzed by quartz crystal microbalance (QCM) technique, which confirmed the formation of the multilayer structure. The electrochemical oxidation of coenzyme (reduced nicotinamide adenine dinucleotide, NADH) was observed on the electrode fabricated with PEI-Fc/DI multilayer film, and the influence of layer number on current response was investigated. The modified electrode retained ca. 65% relative response after storage in buffer for two months and 50% relative response after incubation at 80 °C for 3 min, which inferred that the multilayer structure was unique stable. A NAD-dependent glucose-6-phosphate dehydrogenase (G6PDH) was also immobilized via the same LBL technique, and electrode modified with PEI-Fc/DI/G6PDH film exhibited current response to glucose-6- phosphate in the presence of free NAD+.

Photophysics of Water Soluble Perylene Diimides in Surfactant Solutions

2007 ◽  
Vol 111 (42) ◽  
pp. 10609-10614 ◽  
Author(s):  
Tingji Tang ◽  
Kalina Peneva ◽  
Klaus Müllen ◽  
Stephen E. Webber
Keyword(s):  
Water Soluble ◽  
Perylene Diimides ◽  
Surfactant Solutions

Rendering Rayon Fibres Antimicrobial and Thermal-Responsive via Layer-by-Layer Self-Assembly of Functional Polymers

2011 ◽  
Vol 236-238 ◽  
pp. 1103-1106 ◽  
Author(s):  
Yuan Feng Pan ◽  
Hui Ning Xiao
Keyword(s):  
Self Assembly ◽  
Guanidine Hydrochloride ◽  
Antimicrobial Property ◽  
Water Soluble ◽  
Solution Temperature ◽  
Poly Vinyl Alcohol ◽  
Layer By Layer ◽  
Anionic Polymer ◽  
Water Soluble Polymer ◽  
Lbl Assembly

A thermal-responsive polymer was prepared by partially acetalyzing poly(vinyl alcohol) (PVA). The completely reversible polymer aggregation and dissolution occur above and below a low critical solution temperature (LCST) for the aqueous solution of the modified PVA. The partially acetalized PVA (APVA) with higher molecular weight and higher degree of acetalysis exhibited a lower LCST transition and was used as an anionic polymer for polymer complexation. Water-soluble polymer, cationic polyhexamethylene guanidine hydrochloride (CPHGH) with antimicrobial property, was also prepared. In conjunction with APVA, CPHGH created the unique antimicrobial polymer multilayers on the surfaces of rayon fibres via layer by layer (LbL) assembly. AFM images revealed that the particles generated by multilayers became larger after the material was treated at 60°C; while the roughness of the surfaces was increased as the layer number increased and then decreased. Moreover, antimicrobial tests also demonstrated that the rayon fiber assembled with (CPHGH/APVA) multilayers exhibited higher antimicrobial activity against E. coli and s. aureus.

Novel and Unique Matrix Design for Osteochondral Tissue Engineering

2014 ◽  
Vol 1621 ◽  
pp. 17-23 ◽  
Author(s):  
Deborah L. Dorcemus ◽  
Syam P. Nukavarapu
Keyword(s):  
Tissue Engineering ◽  
Bone Matrix ◽  
Water Soluble ◽  
Layer By Layer ◽  
Micro Computed Tomography ◽  
The Matrix ◽  
Biodegradable Hydrogel ◽  
Osteochondral Tissue ◽  
The Individual ◽  
Osteochondral Tissue Engineering

ABSTRACTOsteochondral (OC) tissue is comprised of articular cartilage, the subchondral bone and the central cartilage-bone interface. To facilitate proper regeneration, an equally complex and multiphasic matrix must be used. Although mono-phasic and bi-phasic matrices were previously applied, they failed to establish the OC interface upon regeneration. In this study, we designed and developed a novel matrix with increasing pore volume from one end to other, along the matrix length. For this matrix polylactide-co-glycolide (PLGA) 85:15 microspheres were combined with a water-soluble porogen in a layer-by-layer fashion and thermally sintered. The resulting matrix was then porogen-leached to form a gradiently-porous structured matrix. The formation of this gradient pore structure was established using Micro-Computed Tomography (μCT) scanning. A biodegradable hydrogel was infiltrated into the structure to form a unique OC matrix where the microsphere and hydrogel phases co-exist with opposing gradients. When the individual phases are associated with osteogenic and chondrogenic growth factors, the structureinduced factor delivery might provide the spatially controlled factor delivery necessary to regenerate osteochondral tissue structure. Overall, we designed a gradient matrix system that is expected to support osteochondral tissue engineering while forming a seamless interface between the cartilage and the bone matrix.

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