Search tips
Search criteria

Results 1-4 (4)

Clipboard (0)

Select a Filter Below

Year of Publication
Document Types
1.  Comparative Study of Alternating Low-band-Gap Benzothiadiazole Co-oligomers 
Journal of Fluorescence  2011;21(4):1625-1633.
The benzothiadiazole – arylene alternating conjugated oligomers have been designed and synthesized via Suzuki coupling reaction. The structures and properties of the conjugated oligomers were characterized by 1HNMR, 13CNMR, UV–vis absorption spectroscopy, photoluminescence (PL) spectroscopy. The luminescent measurements demonstrate that polybenzothiadiazoles are good chromophores able to form thin films by Langmuir-Blodgett (LB) technique, making them suitable for further applications. Also the electrical properties of obtained films confirm the good potential of these novel aryl-based π-conjugated polymers for the development of various electrical and electrochemical solid-state devices.
PMCID: PMC3144376  PMID: 21279539
Benzothiadiazole; Copolymers; Suzuki coupling; Electroconductivity; Luminescence; Atomic force microscopy
2.  Phenoxazine Based Units- Synthesis, Photophysics and Electrochemistry 
Journal of Fluorescence  2010;21(1):169-178.
A few new phenoxazine-based conjugated monomers were synthesized, characterized, and successfully used as semiconducting materials. The phenoxazine-based oligomers have low ionization potentials or high-lying HOMO levels (~4.7 eV), which were estimated from cyclic voltammetry. Conjugated oligomers offer good film—forming, mechanical and optical properties connected with their wide application. These results demonstrate that phenoxazine-based conjugated mers are a promising type of semiconducting and luminescent structures able to be used as thin films in organic electronics.
PMCID: PMC3032184  PMID: 20625802
Phenoxazines; Stille condensation; Cyclic voltammetry; Conductivity; Luminescence; Atomic Force Microscopy (AFM)
3.  Biocatalysts Immobilized in Ultrathin Ordered Films 
Sensors (Basel, Switzerland)  2010;10(11):10298-10313.
The immobilization of enzymes and other proteins into ordered thin materials has attracted considerable attention over the past few years. This research has demonstrated that biomolecules immobilized in different [Langmuir-Blodgett (LB)/Langmuir-Schaefer (LS)] matrixes retain their functional characteristics to a large extent. These new materials are of interest for applications as biosensors and biocatalysts. We review the growing field of oxidases immobilized onto ordered Langmiur-Blodgett and Langmuir-Schaefer films. Strategies for the preparation of solid supports and the essential properties of the resulting materials with respect to the envisaged applications are presented. Basic effects of the nature of the adsorption and various aspects of the application of these materials as biosensors, biocatalysts are discussed. Outlook of potential applications and further challenges are also provided.
PMCID: PMC3230983  PMID: 22163470
biosensors; enzyme immobilization; Langmuir-Blodgett technique; enzyme activity; AFM
4.  Structure and Sensor Properties of Thin Ordered Solid Films 
Sensors (Basel, Switzerland)  2009;9(10):7733-7752.
Miniaturized gas sensors and biosensors based on nanostructured sensing elements have attracted considerable interest because these nanostructured materials can be used to significantly improve sensor sensitivity and the response time. We report here on a generic, reversible sensing platform based on hybrid nanofilms. Thin ordered Langmuir-Blodgett (LB) films built of fluorene derivatives were used as effective gas sensors for both oxidative and reductive analytes. A novel immobilization method based on thin LB films as a matrix has been developed for construction of sensing protein layers. Biomolecules can often be incorporated into and immobilized on Langmuir-Blodgett films using adsorption methods or by covalent immobilization of proteins. The sensor sensitisation was achieved by an amphiphilic N-alkyl-bis(thiophene)arylenes admixed into the film. The interlaced derivative was expected to facilitate the electron transfer, thereby enhancing the sensor sensitivity. The results suggest that this may be very promising approach for exploring the interactions between proteins and high throughput detection of phenol derivatives in wastewater.
PMCID: PMC3292080  PMID: 22408477
Langmuir-Blodgett films; laccase; tyrosinase; diphenylamine and carbazole derivatives; biosensing effect; gas sensors; electroconductivity; AFM

Results 1-4 (4)