A new conjugated alternating donor-acceptor copolymer is synthesized from perylene diimide and the benzodithiophene derivative via the Suzuki reaction. Temperatures corresponding to the 10% weight loss of the copolymer in air and argon are 336 and 362°C. The copolymer is soluble in common organic solvents. The maxima of absorption spectra of the copolymer in chloroform solution and thin films are at 456 and 567 and at 444 and 567 nm, respectively. The optical band gap, as calculated from the onset of the absorption spectrum, is 1.74 eV, and the electrochemical band gap is 1.89 eV. The energies of HOMO and LUMO derived from the onset of the first oxidation and reduction potential of the cyclic voltamperogram are −5.97 and −4.08 eV. It is found that the solar cell with copolymer-to-poly(3-hexylthiophene) = 1: 1 features the best characteristics: The open circuit voltage is 0.54 V, the short circuit current is 0.976 mA/cm2, the fill factor is 0.397, and the efficiency is 0.14%. The conjugated polymer based on perylene diimide belongs to the class of n-type polymers and shows promise as an acceptor material for all-polymer bulk heterojunction solar cells.

A new conjugated alternating donor-acceptor copolymer is synthesized from perylene diimide and the benzodithiophene derivative via the Suzuki reaction. Temperatures corresponding to the 10% weight loss of the copolymer in air and argon are 336 and 362°C. The copolymer is soluble in common organic sol� vents. The maxima of absorption spectra of the copolymer in chloroform solution and thin films are at 456 and 567 and at 444 and 567 nm, respectively. The optical band gap, as calculated from the onset of the absorp� tion spectrum, is 1.74 eV, and the electrochemical band gap is 1.89 eV. The energies of HOMO and LUMO derived from the onset of the first oxidation and reduction potential of the cyclic voltamperogram are -5.97 and -4.08 eV. It is found that the solar cell with copolymertopoly(3�hexylthiophene) = 1 : 1 features the best characteristics: The open circuit voltage is 0.54 V, the short circuit current is 0.976 mA/cm 2 , the fill factor is 0.397, and the efficiency is 0.14%. The conjugated polymer based on perylene diimide belongs to the class of ntype polymers and shows promise as an acceptor mate rial for allpolymer bulk heterojunction solar cells.

A number of new phenylated polyfluorenes with blue emission are synthesized via the Diels-Alder reaction in chloronaphthalene and supercritical carbon dioxide. It is shown that these polymers are thermally stable. A comparative analysis of their properties shows that a "green" solvent is a suitable alternative to organic solvents for obtaining phenyl-substituted polyfluorenes via the Diels-Alder reaction.

Синтезированы новые -сопряженные сополифлуорены с электроноакцепторными триазольными группами в основной цепи и электронодонорными карбазольными фрагментами в боковой цепи макромолекул. Все сополимеры растворяются в обычных органических растворителях, обнаруживают высокую термическую стабильность и прекрасные пленкообразующие свойства. Исследованы их абсорбционные, фото-, электролюминесцентные и электрохромные свойства. Полимерные пленки характеризуются стабильными электрохромными свойствами с изменением цвета от желтого в нейтральной форме до сиреневого в окисленной форме при изменении приложенного напряжения от 0 до 1.9 В. Сополифлуорены также проявляют лучшие электролюминесцентные свойства по сравнению со стандартным гомополифлуореном и могут быть привлекательными электроактивными материалами в качестве излучающего слоя в полимерных светоизлучающих устройствах.

New π-conjugated copolyfluorenes carrying main-chain electron-acceptor triazole groups and side-chain electron-donor carbazole fragments are synthesized. All copolymers show solubility in common organic solvents and exhibit high thermal stability and excellent film-forming behavior. The absorption, photoluminescent, electroluminescent, and electrochromic properties of the copolymers are investigated. Polymer films feature stable electrochromic properties as their color changes from yellow in the neutral from to lilac in the oxidized form during a change in the applied voltage from 0 to 1.9 V. In addition, copolyfluorenes demonstrate better electroluminescent properties than the standard homopolylfluorene and offer promise as attractive electroactive materials for use as emitting layers in polymer light-emitting devices.