Comparative Study of Alternating Low-band-Gap Benzothiadiazole Co-oligomers

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

Phenoxazine Based Units- Synthesis, Photophysics and Electrochemistry

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

Organic semiconductors - materials of the future?

Odkrycie przewodnictwa elektrycznego oraz interesujących właściwości optycznych (luminescencji) makrocząsteczek ze sprzężonym układem wiązań ? zrewolucjonizowało elektronikę. Szerokie możliwości aplikacyjne organicznych półprzewodników (m.in. organiczne komórki fotowoltaiczne, biosensory, organiczne diody elektroluminescencyjne, drukowane obwody) sprawiły, że uzyskały one miano "materiałów przyszłości". W artykule przeprowadzono dyskusję czy rzeczywiście przewodzące związki makrocząsteczkowe zasługują na takie określenie, oraz czy mają szansę zdominować rodzime rynki.The discovery of electrical conductivity and interesting optical properties (luminescence) of macromolecules with conjugated ?-bond system has revolutionized the electronics. Extensive application of organic semiconductors (organic photovoltaic cells, biosensors, organic light emitting diodes, printed circuits) caused that they being named "the materials of the future". In the article was carried out the discussion whether actually conducting macromolecular compounds deserve such a term and will dominate native markets

Development of a Bioorthogonal and Highly Efficient Conjugation Method for Quantum Dots using Tetrazine-Norbornene Cycloaddition

We present a bioorthogonal and modular conjugation method for efficient coupling of organic dyes and biomolecules to quantum dots (QDs) using a norbornene−tetrazine cycloaddition. The use of noncoordinating functional groups combined with the rapid rate of the cycloaddition leads to highly efficient conjugation. We have applied this method to the in situ targeting of norbornene-coated QDs to live cancer cells labeled with tetrazine-modified proteins.National Institutes of Health (U.S.) (NIH Grant 5-U54-CA119349-05)National Institutes of Health (U.S.) (NIH Grant 5R01CA126642-02)National Institutes of Health (U.S.) (NIH Grant U01-HL080731)National Institutes of Health (U.S.) (NIH Grant T32-CA79443