噻吩[3,4- b ]噻吩-苯并[1,2- b:4,5 - b ']二噻吩基聚合物,其具有光学纯的2-乙基己基侧基:在聚合物太阳能电池中的合成及应用
摘要:
光学活性的窄带隙聚合物(([R ,- [R )-和(小号,小号)-PTB5)由交替的Ñ辛基噻吩并[3,4- b ]噻吩-2-羧酸甲酯和苯并[1,2- b:首次合成分别带有光学纯的(R)-和(S)-2-乙基己基侧基的4,5- b ']二噻吩单元。(R,R)-和(S,S)-PTB5膜在聚合物主链的吸收区域中表现出明显的圆二色性,这是由于支链烷基侧基的手性引起的手性有序超结构的形成。使用(R,R)-或(S,S)-PTB5作为电子供体,并用[6,6]-苯基-C 61-丁酸甲酯作为电子,制备了倒置型大容量异质结聚合物太阳能电池(PSC)。受体。将PSC的光伏性能与相应的PSC的光伏性能进行了比较,其中相应的PSC包含带有消旋的2-乙基己基侧基的光学惰性PTB5。
C2‐Symmetric hexahelicenes 3a–3g, which bear four or six alkoxy chains, were prepared in eight‐to‐nine reaction steps in high overall yields. The final step consisted of a twofold oxidative photocyclization of the corresponding 2,7‐bis(2‐phenylethenyl)naphthalenes. Long (and branched) chains provide a good solubility and processability, which is a prerequisite for applications in organic synthesis
This invention provides a highly fluorescent material containing a single (i=0) or a series of (i=1, 2, etc.) complex ring systems. This chromophore is particularly useful for the absorption and emission of photons in the visible light wavelength range and near-infrared wavelength range. This chromophore, highly luminescent with photostability, has various applications, such as in wavelength conversion films. Wavelength conversion films have the potential to significantly improve the concentration efficiency of solar light in photovoltaic devices or solar cells.
CHROMOPHORES FOR PHOTOCHROMIC COMPOSITIONS USEFUL FOR THREE DIMENSIONAL DISPLAY APPLICATIONS
申请人:Gu Tao
公开号:US20170044373A1
公开(公告)日:2017-02-16
Described herein are novel azo-benzene type chromophores. The chromophores are useful in photochromic compositions comprising a polymer matrix and a chromophore, wherein the chromophore is a novel azo-benzene type structure. The photochromic composition is photoresponsive upon irradiation by at least one wavelength of laser light across the visible light spectrum. Photochromic devices which comprise the novel azo-benzene type chromophore compound show significantly higher photoinduced birefringence, higher diffraction efficiency, and brighter images than devices that comprise well known azo-benzene chromophores. The photochromic composition may include a liquid crystal.
Synthesis, photophysical and electrochemical characterization of phthalocyanine-based poly(p-phenylenevinylene) oligomers
作者:Juan-José Cid、Christian Ehli、Carmen Atienza-Castellanos、Andreas Gouloumis、Eva-María Maya、Purificación Vázquez、Tomás Torres、Dirk M. Guldi
DOI:10.1039/b818772j
日期:——
The synthesis of two poly(p-phenylenevinylene) oligomers (oPPV) laterally substituted by phthalocyanines (Pc) is described. The preparation of Pc-based oligomers 1 and 2 was accomplished by means of Knoevenagel and Wadsworth–Horner–Emmons reactions, respectively. Diformylphthalocyanine 3 was employed as a monomer in these reactions, thus providing functionalised conjugated oligomers upon reaction with
The present invention relates to novel sulfonates based upon alcohol perfumes. The sulfonates have the general formulas of (I) and (II): ##STR1## where R and Z are independently selected from the group consisting of nonionic or anionic, substituted or unsubstituted C.sub.1 -C.sub.30 straight, branched or cyclic alkyl, alkenyl, alkynyl, alkylaryl or aryl group; Y is a radical that, upon hydrolysis of the sulfonate, forms an alcohol with a boiling point at 760 mm Hg of less than about 300.degree. C. that is a perfume; and excluding geranyl and neryl methanesulfonates. Preferably these sulfonate compounds are incorporated into laundry and cleaning compositions.